Trimming interface board USB to I2C with embedded load for
Contents
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3. In order to avoid this situation the ground of the 4 wire connector is not connected by default we assume the ground connection is made through the supply ground However if the user wants to have a ground connection on the SEA01 this is still possible without changing the hardware thanks a small signal NMOS Q15 controlled by a GPIO The GPIO is controlled in the GUI advanced configuration 4 6 Active load CV loop constant voltage While trimming the output voltage is straightforward just measure the supply output voltage trimming of the current limitation is more complex You can increase the current until the voltage drops but this process is quite long and uncertain The easiest way is to use an active load asserted on the output voltage when the supply enters current limitation mode its output voltage decreases see Figure 6 Figure 8 CC CV mode of power supply Voltage Supply Constant Voltage CV gt Current fixed by Load Supply Constant Current CC gt Voltage fixed by Load Current In Figure 9 the CV loop USA increases the current by increasing Q7 gate voltage until the supply voltage reaches the desired target voltage typically 80 9096 of nominal output voltage d DoclD027041 Rev 1 13 58 Hardware description and setup UM1832 Note 4 7 Note 14 58 Figure 9 CC CV loop AC_VTARGET CV Loop Anti Steadystate LO
4. 44 Mob CETT 45 Top side component side 46 DoclD027041 Rev 1 5 58 List of figures UM1832 Figure 49 Bottom side IA ereitten ka i eee WA has 46 Figure 50 Assembly plan component side 47 d 6 58 DoclD027041 Rev 1 UM1832 Main characteristics of the board 1 Main characteristics of the board e Bidirectional communication between PC USB and SEAO1 I4C e Self powered from the USB line e On board 19 V generation for SEA programming e Electrical isolation between USB and the other circuitry on the board e Three fC buses running at 100 kHz including one which is electrically isolated from the active load if the SEAO1 is on the primary side D Integrated electronic active load with sink capabilities of up to 25 V 10 A e Self calibrated references e Voltage and current measurement with precision of 0 1 voltage and 1 current e Integrated temperature sensor to monitor load temperature d DoclD027041 Rev 1 7 58 Getting started UM1832 2 Getting started 2 1 System reguirements To use the STEVAL PCCO19V1 board a PC with Windows operating system must be used The GUI graphical user interface works with Microsoft Windows XP Windows 7 or later and NET Framework 2 Note The NET Framework 2 is installed by default on all Windows XP or later operating systems so it is not included in the installation package 2 2 Package
5. Use of sense cables Given the amount of current we highly recommend using sense connection Figure 11 Theory of operation for sense connection STEVAL PCCO019V1 d DoclD027041 Rev 1 UM1832 Running the evaluation board Consider 5 A going through a cable of 1 5 mm section over a length of 50 cm if the resistance of the cable is 6 mQ the IR drop across the cable is 2 R 60 mV 60 mV represents 0 3 of the error which is more than one trimming step of the SEA01 To alleviate this issue the board has dedicated sense inputs for measuring voltage at the supply connection so the IR drop of the cable does not disturb the voltage measurements If the user does not want to use sense connection the sense and force signal must be shorted as in Figure 12 otherwise the board will not operate correctly 5 3 d Figure 12 Measure without sense Figure 13 Measure with sense SEN ENIM Status LEDs The status of the board is given by three LEDs Figure 14 Status LEDs Table 1 LED status definition LED amp color Status D1 Green MCU firmware OK D2 Green Connection with SEA01 established D3 Red Unused DoclD027041 Rev 1 17 58 Running the evaluation board UM1832 5 4 Note 18 58 Connecting supply and trimming board together See Figure 15 for a typical setup of the STEVAL PCCO19V1 board connected to the STEVAL
6. It may also be of interest to zoom the current limitation area a little to observe the detailed power supply behavior In Figure 31 we sweep the current between 3 4 A and 4 0 A with a smaller step 50 mA and we can clearly see the current limitation is around 3 70 A This is also clear in the tabular data see Figure 32 above 3 71 A the current no longer increases because it is limited by the power supply itself d DoclD027041 Rev 1 29 58 Running the GUI UM1832 Figure 31 Zooming on current limitation Main Current Vs Voltage Current Sweep in A CC mode Stat 3400 2 Stop 4000 Step 0 050 2 E Autodetect Make Measurement i Voltage Sweep in V CV mode Stat 19 000 2 Stop 12 000 S Step 0 500 E Make Measurement E clear before Graph Help e ClearGraph_ Graph Data 19 030V 18313V 17 835V 17 357V 16 879V 16 401 V 8 15 923V 15445V 14 967V _ J I I U 3329A 3385A 3440A 3496A 3551A 3 607 A 3 662 3718A 3773A Figure 32 Tabular data of supply in limitation mode Graph Data V TEMPERATURE CCUM Sg T im 18962 3442 34 Limit 18962 3488 34 Limit 18961 3542 34 Limit 18961 3588 34 Limit 18959 3642 34 Limit 18958 3687 34 Limit 18211 3730 34 Limit 15364 711 34 Limit 15122 3712 34 15121 3711 34 15122 710 34 15122 3710 34 Note The GUI can also detect the limiting region automatically and
7. U22 5 V to 24 V voltage for burning operation for port 1 and 2 e U23 5 V to 24 V voltage for burning operation for port 3 OTP burning operation The trimming board is also able to provide the target device with a sufficient Vc voltage for burning If the Vec on the target device is less than17 V the programming Vec can be simply connected to the target Vec with a couple of OR ing diodes Note On STEVAL PCCO19V1 series diodes D8 and D9 are already implemented The 19 V supply current delivered is limited to 100 mA by the on board LDOs U11 and U14 4 3 USB to ZC bridge Communication between the STEVAL PCCO19V1 and the PC is managed by the latter as a standard serial peripheral the IC U18 converts the USB connection into a virtual COM port refer to the Section 9 Board schematic 10 58 DoclD027041 Rev 1 Ly UM1832 Hardware description and setup The RX and TX signals are then isolated using opto couplers U16 and U19 and connected to the STM32 microcontroller U8 ensuring that the USB port and the remaining parts of the board are isolated from the mains The microcontroller is the heart of the system and is in charge of performing conversion between UART and IZC protocols The STM32 manages the UART to DC conversion for bidirectional communication between the PC and the target device The DC speed is set to 100 KHz maximum speed allowed by the SEAO1 A yellow LED placed near the mini B USB connector turns on
8. ky life augmented UM1832 User manual Trimming interface board USB to IZC with embedded load for automatic trimming of power supply based on SEAO01 October 2014 Introduction This user manual describes the operation of the STEVAL PCC019V1 USB to DC trimming interface board with embedded load for automatic power supply trimming based on SEAO1 Hardware and software installation is explained in the first part of the document followed by details regarding use of the interface The STEVAL PCC019V1 is a tool used to interface a Windows based PC with digitally trimmable products like the SEAO1 It is therefore essentially a bidirectional bridge between USB and KC buses The board also embeds an active CC CV load to trim SEA01 based power supplies without any external instruments such as supply voltmeter active load Figure 1 STEVAL PCC019V1 evaluation board DoclD027041 Rev 1 1 58 www st com Contents UM1832 Contents 1 Main characteristics of the board 7 2 Getting started IAA ERE ECKE AERE eed 8 2 1 System requirements 8 2 2 Package contents 8 3 Software installation 9 3 1 Virtual com port drivers installation SiLabs CP2102 9 3 2 GUI installation using the installer 9 3 3 GUI installation
9. U U I U U U 4 U 1 U U U U U U U U _ Main domain USB domain CP2102 STM32 USB UART Bridge MicroController ott nnn Rectifier Cap SEAO01 on the primary side In this case Port 3 must be used otherwise the primary and secondary of the power supply are connected together which would cause a requirements and perhaps even damage the boards lack of galvanic isolation and safety Figure 6 Connection for SEA01 on the primary side not isolated from mains ku ER TER E TRE acc OS TI EE IE IA n STEVAL PCC019V1 domains U U I i USB domain LI I 1 SEA Port 3 UE Rectifier Transfor Switching Rectifier MOS Cap Cap mer Control IC Grounds for SEA01 ports 1 and 2 As mentioned above the SEAO01 ports 1 amp 2 share the same domain as the load This means the SEAO01 grounds and active load are connected together Conversely on the STEVAL ISA161V1 e the main ground is connected to the STEVAL PCCO19V1 board e the SEAO1 ground is connected before Rsense Hence if we connect the grounds the Rsense shunt is short circuited which interferes with the current measurement DoclD027041 Rev 1 d UM1832 Hardware description and setup Figure 7 Recommended SEA01 grounding and power supply connection STEVAL ISA161V1 STEVAL PCC019V1
10. withoutinstaller 9 4 Hardware description and setup 10 4 1 Blockdiagram 10 4 2 Power supply section 10 4 3 USBtoRChbridge 10 44 IA AA EA UA AA ege Bag 11 4 5 Grounds for SEAO1 ports land 2 12 4 6 Active load CV loop constant voltage 13 4 7 Active load CC loop constant current 14 4 8 Thermal considerations 15 4 9 Anti steady state protection 15 4 10 ADC reference and calibration 15 5 Running the evaluation board 16 5 1 Hardware interfaces 16 5 2 Useofsensecables 16 5 3 Status LEDS AA AA AA AA RG aka AE 17 54 Connecting supply and trimming board together 18 6 Running the GUI 19 6 1 Connection management 19 6 2 Power supply basic specifications 20 2 58 DoclD027041 Rev 1 Ly UM1832 Contents 6 3 Modes ofoperation 21 6 4 SEA rt Le eet pecu E d od Ron ar inopi i Min o a d pere
11. 100V 0 17A SOT23 DiodesZetex R9 22K RES 22K O 1 10W 0 0596 0603 SMD Panasonic corp R10 1K RES 1K O 1 10W 0 0596 0603 SMD Panasonic corp R11 OR 0 0 O 596 1 10W 0603 YAGEO R12 NP RES NP 0603 R13 OR 0 0 O 596 1 10W 0603 YAGEO R14 3 9K 3 9K Q 596 0603 SMD R15 1 2K RES 1 2K O 1 10W 0 05 0603 SMD Panasonic corp R16 10K RES 10K Q 1 10W 0 05 0603 SMD Panasonic corp R17 1 2K RES 1 2K O 1 10W 0 05 0603 SMD Panasonic corp R21 470K RES 470K Q 5 0603 R22 68K RES 68K O 1 10W 5 0603 SMD Panasonic corp R23 10K RES 10K O 5 1 10W 0603 SMD R25 47K 47K O 5 1 10W R26 1K 1K Q 5 1 10W Panasonic corp d DoclD027041 Rev 1 51 58 Bill of material UM1832 Table 5 Bill of material continued Ref Value Description Manufacturer R28 10K 10K O 5 1 10W Panasonic corp R30 10K 10K O 596 1 10W Panasonic corp R31 47K 47K O 5 1 10W R32 4 7K RES 4 7K O 5 1 10W 0603 SMD R33 470K RES 470K O 5 0603 R34 22K 22K Q 5 1 10W Panasonic corp R35 1 00K Resistor 1 00K O 1 10W 196 0603 SMD Panasonic corp R36 0 1R RES 0 1 Q 1 30W CADDOCK R37 1 00K Resistor O1 00K Q 1 10W 196 0603 SMD Panasonic corp R38 10K 10K O 596 1 10W Panasonic corp R39 10K 10K Q 5 1 10W Panasonic corp R40 330R 330R O 5 1 10W R41 330R 330R O 5 1 10W R42 OR 0 0 O 5 1 10W 0603 YAGEO R43 OR 0 0 O 596 1 10W 0603 YAGEO R44 330R 330R O 5 1 10W R45 10
12. CD CEA Poner Status Reload a Control of Active load SEA controls The user can dynamically change the V I trimming values of the SEAO1 or reload the original V I trimming values stored in the OTP Active load control The user can dynamically change the active load control e Voltage Target this is the target the CV loop will try to reach e Current Limitation this is the limiting current of the load DoclD027041 Rev 1 23 58 Running the GUI UM1832 6 5 1 Note 6 5 2 Note 24 58 Example 1 the effects of voltage trimming See Figure 23 Set a reasonable current limit let s say 200 mA this will allow the dissipation of very low power into the load 19 0 2 3 8 W hence long operating time The Voltage Target value does not have any influence the CC loop of the load effectively limits the current so the CV loop has no influence Play with the VrefV trimming knob of the SEA01box and observe the variations in the output voltage The load is operating in CC mode as expected 187 mA measured for 200 mA target Figure 23 Manual operation load in CC mode playing with voltage trimming POWER SUPPLY TRIMMING BOARD E Rn SR LOAD e Load CC RETTEN NA Impacts dn om Vout Chip NVM Available 1 Status Reload L Se Example 2 the effects of current trimming See Figure 24 Set a reasonable voltage for VTarget typically 1 or 2 V be
13. ISA161V1 1 connect the trimming board to a PC with the USB cable 2 connect the target device SEAO01 board with the 4 wire flat cable to the trimming board 3 connect the power supply terminal to the load see Section 4 2 4 connect the mains to the power supply board Figure 15 Basic setup with STEVAL ISA161V1 board left and trimming board right Be sure that the target device is correctly supplied e thegreen LED D1 turns on when the MCU has booted and the board is supplied by the USB power e the yellow LED D4 turns on when the USB UART bridge is correctly recognized by the PC If this is the first time a CP210x SiLabs USB UART bridge driver is installed on the system it will first install the drivers Run the SEA01 GUI software on the PC d DoclD027041 Rev 1 UM1832 Running the GUI 6 Running the GUI The first screen that appears is shown in Figure 16 Figure 16 SEA01 GUI startup screen Connection See Management comi7 Connect To IF Board SEA Pot 1 H Mode of Main Curent Vs Voltage operation POWER SUPPLY TRIMMING BOARD Power S Supply Area E 9 Trimming board area The GUI is divided in 3 areas e Connection management used to manage connection with the trimming board and the SEA01 chip e Power supply area all controls related to the SEAO1 based supply nominal specification trimming controls e Trimming board area control of the
14. SW1 B3S 1000P SMT Tactile Switch OMRON TP2 TP Point Test TPTH ANELLO 1MM TP3 TP Point Test TPTH ANELLO 1MM TP4 TP Point Test TPTH ANELLO 1MM TP5 TP Point Test TPTH ANELLO 1MM TP6 TP Point Test TPTH ANELLO 1MM TP9 TP Point Test TPTH ANELLO 1MM TP10 TP Point Test TPTH ANELLO 1MM U1 STG719 IC ANLG SW SPDT 6 PIN SOT 23 STMicroelectronics U2 STG719 IC ANLG SW SPDT 6 PIN SOT 23 STMicroelectronics U4 STG719 IC ANLG SW SPDT 6 PIN SOT 23 STMicroelectronics U7 TC74A0 3 3VAT Temp Senor DC 40 125 C 3V3 MICROCHIP U8 STM32F373CCT6 IC MCU RISC 72 MHz 256KB 32KB TQFP 48 STMicroelectronics U9 ESDALC6V1P6 Quad TVS 3V U10 ESDALC6V1P6 Quad TVS 3V U11 LM2931DR IC VOLT REGADJ 100MA 8 PIN SOIC STMicroelectronics U12 Si8400AA I C Silicon IC Isolator 1kV 1 7MHz SO8 Silicon Laboratories U13 ESDALC6V1P6 Quad TVS 3V U14 LM2931DR IC VOLT REGADJ 100MA 8 PIN SOIC STMicroelectronics U15 ACPL M61L 1ch Optocoupler CMOS output Low Power SO 5 Avago 54 58 DoclD027041 Rev 1 er UM1832 Bill of material Table 5 Bill of material continued Ref Value Description Manufacturer U16 ACPL M61L 1ch Optocoupler CMOS output Low Power SO 5 Avago U17 USBLC6 2P6 USBLC6 2P6 RESEAU DE DIODE TVS USB2 STMicroelectronics U18 CP2102 UART over USB bridge QFN28 Silicon Labs U19 ACPL M61L 1ch Optocoupler CMOS output Low Power SO 5 Avago U20 NMD050515SC Isolated Dual Output DCDC 5V gt 5 amp 15V Murata U22 NMK0512SC Isolat
15. auo seu _ gert auo oV weou MedJeujoue si sti ing AbZ lt S OSPZSOOWN Aq paveda eq pino gt eae A Yo Seu E nt anor T sora ovo ES dun T T T i va Wa Ae Ae se Jona an uLeewavieeza P anzz anez ert ou ssn oNo PEELE D yo 98H Amt anzz 189 izes ZLNOA PETER Sen s 9dz 9218sn _ Sei on by T 8822883 r un oer ou g anow NIS z ed o d d aa Wie CINSLZLOdBLAJE Nine ne 88 m en SON Dk oe adv QiNSIZLOdBLIWTS Ven Moz Linon T E Zu die Y D 9 E er n D ON a cs shea an9 an9 n g LOA NA Ix ynon ON ano LE 8 d xo ant wa OSSISOSOGWN estas EM m H SUR Je t Wo Ne jon D D o N Jo ZI snan k REFEETE ANOOL GINSIzLOdaLW18 voos o een avo 259 NOZI MNOOS9f0 A QA DIE AR Act S AS BSN Im OS z01249 JE H ii Moz aiqewene 1 usul ZL 5 Inq uBnoue aq pinous AC ain ba hall bl tim Ed Les gm2ermgen gent QNO Noo 9r LOWY T 6 9 Quo dN S i xn z F 90219 Wis ao v auo 99 ae z TE E B D GdA 9 1 ein mu dA A Now Sai oral asn as awe peo1 A2 a xi ZOZI LILI xin K z uleuioq uey gt 50A T 1 9 E BAE QA SE aan DoclD027041 Rev 1 40 58 Board schematic UM1832 Figure 43 MCU section SOSVHOPLOLZOLHL OdSO dA ov NA 2av 8N3 90ud Wis Ou ga dl oqv NOL E BAE GGA gt gt isouviA ova
16. grid Display V I value yellow box e Ifthe clear before box is checked each time a new measurement is performed the previous data is automatically cleared otherwise the previous data remains displayed on the graph e Multiple curves on the same chart when multiple data is displayed on the same graph a new color is associated with each new set of measurements you can show or hide sets of measurements by clicking the associated color in the legend box see Figure 27 for each curve the type of sweep CC CV and the conditions are displayed in the legend box Figure 27 Legend of graph Graph Data 19981V 18806V 16455V 14104V lll CC Start 0 5 Stop 4 Step 0 5 I CV Start 21 Stop 1 Step 0 5 11 754V Samu e Measurements in tabular form are also available in the Data tab see Figure 28 voltage and current are given in mV mA temperature is also displayed CCLim indicates whether the load is operating in CCmode limit or CVmode nothing d DoclD027041 Rev 1 27 58 Running the GUI UM1832 6 6 2 Note 28 58 Figure 28 Tabular data Graph Data V I TEMPERATURE CCUM 3288 26 Limit 19080 3342 26 Limit 19078 3387 26 Limit 19079 3441 26 Limit 19078 3487 26 Limit 19076 3540 26 Limit 19076 3588 26 Limit 19076 3641 26 Limit 19076 3687 26 Limit 18289 3728 26 Limit 15413 3708 26 Limit 15211 371 26 15212 3
17. lt gt MD pij lt lt POLN OVA 99 ezu OOK BL OPA WHEL AD E wayo wan E NOL Edl 190 7887809 o eo ay us doo A9 ow Wnoo K SdL davon lt 2 29 LZIE SAAD Ar 2z v on v on 31007 90219 884 dN ASE o Ya anz E 1 t Sod OVOJ DoclD027041 Rev 1 42 58 Board schematic UM1832 Figure 45 SEA01 interface and isolation Ka i BiH md i E Ge paigesip AGL uBIH NANO yo G37 eioN S TH E Wis oe o H A zou 2222 DEEN o S Up NO ano AVION t s h ds 5 59 em ke z N yote D xz ele Sa ong 77 ieu Sn i o SECH E MATE Ji H W iem E i vn S Aveda DKCH H Wild avo wa gue DS ONO eisva e i Kd s lo gt 9 VVOOVBIS SATASO WOSS an TS gt sia i um en 9 3 t Cha sv vc eos o2 i 3 vasa vasv FE vas oa venia diis Ya weme IVANY x Karen wc HH ZH 3001 7 P noo Ls DIN m wo eeo 2cl ulewog pejelos i anu 8 e caa SEENEN BAE AGA Wis oe no 3189608 peo AC m Ho amp vN3 ooud wey ZOZI 8 LOZI D m us ujewog uen WOOud 29A oss un Nee A AA 9 sva Y am 694 Pe os Zoe ze z t 1 CERES 300 894 szosz yao 3001 IVI NN 194 994
18. zoom the inflection area by checking the AutoDetect box see Figure 33 Figure 33 AutoDetect feature of current sweep Main Curent Vs Voltage Current Sweep in A CC mode Stat 1 000 2 Stop 9 000 Step 1 000 V Autodetect Make Measurement 6 6 3 Voltage sweep As already mentioned it is also possible to perform a voltage sweep of the load In this case the current limitation is set to the maximum value 10 A hence we can observe the various current protection capabilities of the supply vs voltage 30 58 DoclD027041 Rev 1 Ly UM1832 Running the GUI Note Note d The user only needs to enter the start and stop and step values of the voltage sweep and click the make measurement button Vstan must always be greater than V stop See example Figure 34 where a sweep from 20 V down to 1 V is performed and the results are shown e TOT Vtarget above 19 V there is no current which is expected as the load can only sink current from the supply so Voy is always 19 V e for Vtarget around 19 V the supply is regulating hence operating in CV Mode e below 19 V nominal the behavior of the STEVAL ISA161V1 supply is a constant current at 3 710A 2 mA measurement uncertainty e below 8V the supply enters short circuit protection mode Voc below turn off threshold During CV sweep the limitation current used is set to 10 A DoclD027041 Rev 1 31 58
19. 01 on the primary side not isolated from mains 12 Recommended SEAO01 grounding and power supply connection 13 CC CV mode of power supply 13 GC CV OOP DET 14 Description of the various connectors of the board 16 Theory of operation for sense connection 16 Measure withoutsense 17 Measure with sense 17 tatus LEDS xx ee KA Pca Zoe ale rale uu e A ERAN cae S 17 Basic setup with STEVAL ISA161V1 board left and trimming board right 18 SEAO01 GUI startup screen 19 Successful connection to SEA01 20 SiLabs VCP in the device manager 20 Power supply specification DOK 20 SEA trimming tab isis acta aa iaat kerti iar EEn dew Rabe AA AA 22 OTP programming ENNER ENER ee ade be ee d RR cR m a RR Re RR e dd 23 Manual operation tab 23 Manual operation load in CC mode playing with voltage trimming 24 Manual operation load in CV mode playing with current trimming 25 Vil graph ii euriaren n x Rar RE RA TAE EEG 25 CC CV curves for su
20. 48 Top side component side O OJ 46 58 DoclD027041 Rev 1 Ly Board layout Figure 50 Assembly plan component side UM1832 L qvo auvog 4 1 1035 TN Tosi 140d i i e 862 a EIN OVOT 1X3 1ng E w z M Ld 63 Hause mlj m 6 KT lafe a E d PIR OZIU 908 BR sl III 1 w sa c n M N BLO EIN en x Pm Bola ee 459 Lh d get t ng 5 l TATER tol zi il mg 92 zu tr Gu ji ar yun 13934 s r i amp Ti amp TE E ya r wv m m m c Lei o2 nm La x Ig 7g 60 47 58 DoclD027041 Rev 1 Bill of material UM1832 11 Bill of material Table 5 Bill of material Ref Value Description Manufacturer C4 NP CAP NP 0603 C5 100NF CAP CER 100nF 50V X7R 0603 Murata C6 1UF CAP CER 1UF 16V X5R 0603 TAIYO YUDEN C7 100NF CAP CER 100nF 50V X7R 0603 Murata C8 100NF CAP CER 100nF 50V X7R 0603 Murata C9 22UF CAP ELEC 22UF Panasonic C11 1NF CAP CER 1nF 50V X7R 0603 Murata C13 330PF CAP CER 330pF 50V X7R 0603 C14 10NF CAP CER 10nF 25V X7R 0603 AVX C15 1NF CAP CE
21. 7 and un check allow the computer to turn off this device to save power DoclD027041 Rev 1 35 58 Troubleshooting UM1832 Figure 37 Disabling USB suspend mode of CP2102 ees See Silicon Labs CP210x USB to UART Bridge COM17 Properties x Gene Pot Stings Diver Datais Power Management e Silicon Labs CP210x USB to UART Bridge COM17 LOK JI Conca 8 3 Voltage measurement fluctuating when using isolated SEA Port 3 Despite it not being necessary with the STEVAL ISA161V1 the user may want to use the SEA isolated port 3 see Chapter 4 4 Isolation It this condition the user might observe unstable voltage measurements roughly 100 mV fluctuations The reason is that as Port 3 is isolated the EMI AC currents aren t under control and this can damage high impedance low voltage nodes and especially the voltage measurements In order to avoid this add a decoupling capacitor between GND PRIM the isolated ground from Port 3 and GND STM the ground of the microcontroller as shown in Figure 38 Figure 39 shows an applied decoupling capacitor 4 7 nF 400 V X1Y1 is used Figure 38 Closing AC currents between isolated domain and main domain Mmmm j LE 1 STEVAL PCCO19V1 domains Isolated Rectifier Cap Control IC Load ee p 2 2 2 2 2 2 I d 36 58 DoclD027041 Rev 1 UM1832 Troubles
22. 709 26 15212 3709 26 15210 3709 26 Current sweep The user only needs to enter the start and stop and step values of the sweep and then click the make measurement button Figure 29 shows an example of current sweep observed on the STEVAL ISA161V1 supply We can clearly see the limiting current around 3 7 A During the CC sweep the target voltage used is set to 8096 of the nominal voltage hence 19 V 80 15 2 V Figure 29 Current sweep graph Main Current Vs Voltage Current Sweep in A CC mode mm 0500 E Stop 4 000 E Step 0200 i 7 Autodetect Make Measurement Voltage Sweep in V CV mode NEN mu Stat 19 000 Stop 12 000 Step 0500 Make Measurement Graph Data Voutzi9V e V clear before Graph Help Clear Graph 18 294 V i 17743V zi 17 191 V 16 640 V a 16 089 V 15537V 14986 V 14435V mv kr re I ie Td jd U 044A 0853A 1272A 1691A 2110A 2529A 2947A 3366A 3785A Ilim 3 7A DoclD027041 Rev 1 Ly UM1832 Running the GUI In Figure 30 we zoom the CV area of the supply where we can clearly observe the supply load regulation characteristics of the STEVAL ISA161V1 supply e between 0 5 A and 3 5 A the output voltage drops from 19 007 V to 18 962 V e hence 45 mV 3 A 15 mV A Figure 30 Supply load regulation I i I t i I i I i I 0440A DEA 1206A 1 589 A 172A 2355A 2738A 3120 3503A
23. AD_EN 5i protection DAC UN CC Loop ADC The desired target voltage is set by a 12 bit DAC from the STM32 the target voltage range is between O and 26 V with 6 4 mV LSB The absolute precision of the target voltage is not designed to be precise it is governed by the DAC 0 5 gain error resistive dividers of the loop etc The CV loop is mainly used to measure the limiting current and the CV voltage has very limited influence in this case The ADC voltage measurement on the other hand has a precision of 0 1 Active load CC loop constant current Another loop is the constant current CC loop designed to e protect the board in case of overcurrent e Sink a given current from the supply so the supply operates in CV mode This loop is built around U5B which compares the current measured on R36 shunt and the target current set the by the BB If the current is higher U5B Q9 artificially decreases the feedback voltage of the CV loop thus U5A lowers the gate voltage of Q7 until the current reaches the target limit of the MCU The load limiting current is set by a 12 bit DAC from the STM32 the limiting current range is between 0 and 33A DAC full range but the board is sized up to 10A Resolution is 8 mA LSB The MCU is informed when the load is operating in constant current mode the output voltage of U5B comparator is connected to Q13 wired in open collector and connected to a MCU GPIO Thus th
24. CD ROM drives De Human Interface Devices gj IDE ATA ATAPI controllers IEEE 1394 Bus host controllers Imaging devices amp Keyboards E Memory technology driver n Mice and other pointing devices AE Modems Ki Monitors Er Network adapters 47 Ports COM amp LPT IZI Communications Port COMI Y ECP Printer Port LPT1 FA Silicon Labs CP210x USB to UART Bridge COMI D Processors PP Security Devices X Sound video and game controllers ql System devices 8 Universal Serial Bus controllers Power supply basic specifications The GUI must have a nominal power supply specification These values are used as the target for the trimming operation see Figure 19 The default values match the STEVAL ISA161V1 board i e 19 V 3 75 A Figure 19 Power supply specification box POWER SUPPLY Warning Be sure to select the voltage and current that match the power supply used Effectively the SEA01 range is 3 for voltage and 50 DoclD027041 Rev 1 Ly UM1832 Running the GUI If the target voltage current exceed this window e g 12 V or 5 A it will obviously be impossible to trim the power supply 6 3 Modes of operation There are three possible modes of operation e SEA trimming the GUI trims the SEAO1 chip in order to meet the target power supply voltage and current specification e Manual control this allows tuning of both the SEAO1 target chip an
25. D misano weg oe BAE AGA punos6 uBniou Bursues juauno Ajddns jo pub oj pejoeuuoo jou si LOVAS Jo AN9 leAn29ye jnejep Aq peroeuuoo jou s Jojoueuoo JO GND KO Na OND vas SON Wis oe Jus om pawwejbojd eq ues eum e je aap euo Ajuo yng siwa ii ZOZI LOZI Usemjeg peJeus s AGL 3JON zeon zon H WM GND GND vor ton HH wg SALASOTVOSI Y on 4001 sosi 7 t kusa 1 vas oa am rm 4 6405120 ae de dirIVIzdNV NO9 ou pal BAE QA 43 58 DoclD027041 Rev 1 UM1832 Board schematic Figure 46 ADC reference and calibration GSPG14102014D11520 TAA IS OAV 43uA NOV 06 OL uone1queo 2av ua JAY lt N avon ve au weuno ANE 1unooze oput oye em Du NQVOYA JO QNOV 0 me peoususjat oq UBO queo Jaye Jo PAN K 434A ou KH ATI DI 2NO0L 89 80 0 ONO OL ole 3NO00L qr 9 19 x1 S is dnb Y KH Cen 99 EA NEA mA NE D I ua 614915 z 5 IL n E JU ew ply EAC CGAY E pasn eq ueo S JO SN ue LpOFW1 ZG SION amp TAS 438 K TAS J34A SV3WA NOV amp N INnHSA aS E D dN zla Ni oav ERS ii i ZS je amp d INnHSA d oav rab i Go Y T ku NI 99A 1 6191s z BulijeoS Buuajl3 10 UOISLAOJd zn 3 IL D t 1 I NOL A angy S9 BAE GdAv tat ji uopoetoid DAY ai OZ LLL dN ozta NOV lt N OO ZA E ANE 69070 dN LH 890 AL YI ory NA 00v wa z Ke K d
26. EE 21 6 4 1 Voltage trimming 22 6 4 2 Limiting current trimming 22 6 4 3 OTP Programming operation 22 6 5 Manual operation 23 6 5 1 Example 1 the effects of voltage trimming 24 6 5 2 Example 2 the effects of current trimming 24 6 6 Voltage current graph 25 6 6 1 Chart controls edes ek bed bated WA II aa 27 6 6 2 Current SWeOD saa s etate recae etm dee die Ee tuae HERE read Ee 28 6 6 3 Voltage sweep 30 7 Configurall H iuo de EIA REPRISE Zak ve du vani 33 7 1 jn EET rr 33 7 2 Force ele e IIIA ee EE 33 7 3 Temperature 34 8 Troubleshooting 35 8 1 No LED activity is observed on the trimming board 35 8 2 USB yellow LED turns off after 3 or 4 seconds 35 8 3 Voltage measurement fluctuating when using isolated SEA Port 3 36 8 4 Transient peak current when load is operating in CC mode on the STEVALSISATOTVT cscs acta acp aee pk Eg re atn RR onc d a D RR Ce dac 37 8 5 Supply enters protection mode during voltage trimming on the STEVAL ISATOTVT uia ots exce aa ES m Ce ae aia c de sod 37 8 6 Supply sometimes produces clicking sounds on the STEVAL ISA161V1 38 8 7 Power su
27. I to ensure it does not exceed a given threshold typ 60 C settable by software Anti steady state protection As mentioned above all measurements are burst The MCU enables disables the load in order to keep the heat sink temperature inside a reasonable range A hardware safety mechanism based around Q10 is implemented on the board to prevent the load being engaged for more than 1 s e g if the CPU is stalled ADC reference and calibration The STM32F3 series embeds 16 bit sigma delta ADCs SDADC The reference voltage of the SDADC is provided by a shunt voltage generator D1 which delivers 1 225 V 0 1 However the internal analog front end amplifiers before the SDADC needs to be calibrated Each channel V and is therefore connected to a mux U1 and U2 in order to measure a reference voltage The reference voltage to be measured is provided by U4 in order to select 10 or 90 of the SDADC reference voltage This calibration process is only run once when the GUI connects with the board DoclD027041 Rev 1 15 58 Running the evaluation board UM1832 5 5 1 5 2 16 58 Running the evaluation board Hardware interfaces Figure 10 Description of the various connectors of the board Non isolated SEA Status LEDs 41 8 2 Reset 3 7 Button E Mini USB B p 5 A connector USB Enum LED WP CO Isolated SEA Port 3 I 1 I 1 Sense amp Force Sense amp Force Supply Supply
28. K 10K O 596 1 10W Panasonic corp R46 NP RES NP 0603 R47 NP RES NP 0603 R48 NP RES NP 0603 R49 OR 0 0 O 5 1 10W 0603 YAGEO R50 OR 0 0 O 5 1 10W 0603 YAGEO R51 OR 0 0 O 5 1 10W 0603 YAGEO R52 100R 100 Q 5 1 10W Panasonic corp R53 100R 100 O 5 1 10W Panasonic corp R54 100R 100 Q 5 1 10W Panasonic corp R55 100R 100 O 5 1 10W Panasonic corp R57 NP RES NP 0603 R58 NP RES NP 0603 R60 NP RES NP 0603 R61 NP RES NP 0603 R62 1 00K Resistor 1 00K O 1 10W 1 0603 SMD Panasonic corp R63 1 00K Resistor 1 00K O 1 10W 1 0603 SMD Panasonic corp R64 100R 100 O 5 1 10W Panasonic corp R65 100R 100 O 5 1 10W Panasonic corp 52 58 DoclD027041 Rev 1 Ly UM1832 Bill of material Table 5 Bill of material continued Ref Value Description Manufacturer R66 1 00K Resistor 1 00K O 1 10W 1 0603 SMD Panasonic corp R67 1 00K Resistor 1 00K O 1 10W 1 0603 SMD Panasonic corp R68 100R 100 Q 5 1 10W Panasonic corp R69 100R 100 O 596 1 10W Panasonic corp R70 10K 10K O 596 1 10W Panasonic corp R71 22K 22K O 1 1 10W Panasonic corp R72 47K 47K Q 5 1 10W R73 330K 330K Q 5 0603 SMD R74 10K 10K O 5 1 10W Panasonic corp R75 10K 10K O 5 1 10W Panasonic corp R76 1 00K Resistor 1 00K O 1 10W 1 0603 SMD Panasonic corp R77 1 00K Resistor 1 00K O 1 10W 1 0603 SMD Panasonic corp R78 100R 100 O 5 1 10W Panasonic corp R79 100R 100 Q 5 1 10W Pa
29. R 1nF 50V X7R 0603 Murata C16 10UF CAP CER 10yF 25V X5R 1206 Murata C17 NP CAP NP 0603 C18 100NF CAP CER 100nF 50V X7R 0603 Murata C19 18PF CAP CER 18pF 50V X7R 0603 C20 18PF CAP CER 18pF 50V X7R 0603 C21 4 7UF CAP CER 4 7UF 6V3 X5R 0603 C22 100NF CAP CER 100nF 50V X7R 0603 Murata C23 100NF CAP CER 100nF 50V X7R 0603 Murata C24 4 7UF CAP CER 4 7UF 6V3 X5R 0603 C25 100NF CAP CER 100nF 50V X7R 0603 Murata C26 4 7UF CAP CER 4 7UF 6V3 X5R 0603 C27 100NF CAP CER 100nF 50V X7R 0603 Murata C28 4 7UF CAP CER 4 7UF 6V3 X5R 0603 C29 100NF CAP CER 100nF 50V X7R 0603 Murata C30 10UF CAP CER 10yF 25V X5R 1206 Murata C32 100NF CAP CER 100nF 50V X7R 0603 Murata C33 100NF CAP CER 100nF 50V X7R 0603 Murata C36 100NF CAP CER 100nF 50V X7R 0603 Murata C38 100NF CAP CER 100nF 50V X7R 0603 Murata C39 100NF CAP CER 100nF 50V X7R 0603 Murata C40 1UF CAP CER 1UF 16V X5R 0603 TAIYO YUDEN C41 1UF CAP CER 1UF 16V X5R 0603 TAIYO YUDEN 48 58 DoclD027041 Rev 1 Ky UM1832 Bill of material Table 5 Bill of material continued Ref Value Description Manufacturer C42 2 2UF CAP CER 2 2yF 25V AVX C43 1UF CAP CER 1UF 16V X5R 0603 TAIYO YUDEN C44 2 2UF CAP CER 2 2uF 6 3V X5R TDK C46 2 2UF CAP CER 2 2yF 25V AVX C47 2 2UF CAP CER 2 2yF 25V AVX C48 2 2UF CAP CER 2 2yF 25V AVX C49 2 2UF CAP CER 2 2yF 25V AVX C52 100NF CAP CER 100
30. active load 6 1 Connection management The GUI automatically detects the COM port to be used the GUI selects the CP2102 based VCP First we establish connection with the trimming board e click connect to IF board e the firmware performs ADC voltage and current calibration takes 2 s approx If connection is successfully established the rest of the GUI becomes undimmed and the status bar reads connected to IF board The next step is to communicate with the trimming IC e select the SEA01 port where the trimming IC is connected e click connect to trimming IC e the system looks for a known trimming IC and displays its reference and the associated IC address in the status bar see Figure 17 e The firmware revision of the trimming board is also displayed in the right corner q DoclD027041 Rev 1 19 58 Running the GUI UM1832 6 2 20 58 Figure 17 Successful connection to SEA01 CONNECTED TO SEA01 0x52 FW Version 1 0 4896 Nov 21 2013 If the GUI does not find a SiLabs based VCP an error message pops up Check Device Manager to ensure the SiLabs VCP is correctly recognized Click EE Pause and select Device Manager see Figure 18 Figure 18 SiLabs VCP in the device manager f Device Manager seq T File Action View Help mitliki smi si 4 2 RNSNB749 Ab Batteries 18 Biometric Devices o Bluetooth Radios JW Computer cs Disk drives E Display adapters 43 DVD
31. avon dn DAVKL waku meng yo is zc SLL su NI 29A 3 614918 3 dd uz ones ooi in HI f 2 Tam 0 2 L epa aen 690 BAE QQ V DoclD027041 Rev 1 44 58 Board schematic UM1832 Figure 47 Mechanics GSPG14102014D11525 Den MSS VITINI ZN 2 ew wagons DI Den MIYOS an C Je9lIS wa MSI ew sons OZW 139MVILIVILdO SEI 139MVIIVILdO oam 139ouvI TO A0 Losin MOJE een WILWOLXBZX0S A Zp yursieeH papa VS OS ORMIS ISH esegjeuueu oo s c M Si Xxx ee d XXX Nee SN 8 02201 YOLVIOSI SW ayd TIS lt gt p CS OK EE DXX lt I ejseg jJeuueu OZZOL dno zw OZZOL dno E OZZOL dio Lon WWS W3ovds WWS U3IVdS WAS U3IVdS WWS HAVS EI Vum 6n m 9 WWZ E 310H 9 WWZ 310H 9 WWZ 310H 9 WWZ 310H AA gu C G ew sons ew sors SIN PIM SEN Mauios 9 tW Nauos Ed E S EJ e CX KH ew wagons ew wagons LUN BIN Seu Mauos Seu Mauos TUTTA A ZU L 2 p Buoj us ae S U ESN Sum v asn vzw bech eiss SLO p VUE WWZ sie Pld 1dy ewen cn 45 58 DoclD027041 Rev 1 Board layout UM1832 10 Board layout Figure
32. contents The STEVAL PCC019V11 includes the following items e Hardware Trimming interface and load demo board also referred to as the Trimming Board later in this document USB A to USB mini B cable 4 wire flat cable for target connection to SEA01 board e Software USB drivers PC GUI installation package e Documentation User manual Data brief d 8 58 DoclD027041 Rev 1 UM1832 Software installation 3 3 1 3 2 Note 3 3 d Software installation To use the STEVAL PCCO19V1 first install the USB driver and the PC GUI Virtual com port drivers installation SiLabs CP2102 First install the USB drivers Install either e CP210xCVCPInstaller x86 exe for 32 bit OS e CP210xCVCPInstaller x64 exe for 64 bit OS e Alternatively the latest driver versions can be downloaded from the SiLabs web site http www silabs com products mcu Pages USBtoUARTBridgeVCPDrivers aspx When the trimming board is subsequently plugged into the PC the driver is automatically installed on the system GUI installation using the installer Launch setup exe and follow the installation wizard instructions The GUI is installed by default under C Program Files x86 SMicroelectronics SEA Trimming Tool 1 1 Figure 2 shows the GUI icon created in the Start menu under STMicroelectronics SEA Trimming Tool Figure 2 SEA trimming tool icon in the start program J STMicroelectronic
33. d the active load e Vll graph the GUI displays the voltage current graph so the user can view the supply characteristics Following sections will describe each mode in details 6 4 SEA trimming How to activate SEA trimming Go to the main tab and click the SEA trimming button Figure 20 shows the trimming tab environment Chip status This box indicates e the actual V I trimming parameter used e the number of OTP fuse operations available SEAO1 can only be trimmed twice DoclD027041 Rev 1 21 58 d Running the GUI UM1832 6 4 1 6 4 2 6 4 3 Note 22 58 Figure 20 SEA trimming tab Main Current Vs Voltage POWER SUPPLY TRIMMING BOARD Supply Nominal Parameters LOAD Chip VEN Status Chip NVM Available 2 Status Voltage gt Calibration Current Ji i K Calibration D Voltage trimming The only parameter is the load current under which voltage calibration is performed To perform voltage trimming without a load un check the use load check box Otherwise check the box and specify the load current Yo of nominal voltage used for voltage trimming Then click the TrimV button Once the trimming is achieved the status box displays the voltage trimming step and the associated effective voltage Limiting current trimming As discussed in Section 4 6 the load operates in CV mode for supply current trimming Specify the ratio of t
34. der acknowledgement Purchasers are solely responsible for the choice selection and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products No license express or implied to any intellectual property right is granted by ST herein Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product ST and the ST logo are trademarks of ST All other product or service names are the property of their respective owners Information in this document supersedes and replaces information previously supplied in any prior versions of this document O 2014 STMicroelectronics All rights reserved d 58 58 DoclD027041 Rev 1
35. e GPIO is low when the loop is in CC mode As with the voltage the absolute precision of the load limiting current is not designed to be precise it is governed by the DAC 0 5 gain error precision of the loop etc The CC loop is mainly used to limit current during the current sweep operation the current considered is the measured current not the limiting current target obviously they re very close The current ADC on the other hand is designed to be 196 precise d DoclD027041 Rev 1 UM1832 Hardware description and setup 4 8 4 9 4 10 d Thermal considerations The power delivered by the power supply is dissipated by the MOS and shunt mounted together on a heat sink The STEVAL ISA161V1 delivers 3 5 A 19 V so the power dissipated in the load is approximately 3 5 A 19 V 66 5 W The heat sink on the board has a limited thermal resistance Ry 10 K W in order to minimize cost size of the board This implies a temperature of 25 66 5 10 690 in steady state conditions Obviously far above the maximum junction temperature Actually the heat sink can sustain 80 W during 25 s steady state operation thus reaching a temperature of 90 C In order to limit the temperature all the measurements are burst load is engaged measurement is performed load is shutdown with the maximum on time being in the order of 1 s The temperature of the load is also monitored by the firmware and the GU
36. ear before Graph Help 9 GearGraph Graph Data Graph or tabular data q DoclD027041 Rev 1 25 58 Running the GUI UM1832 Note 26 58 Current or voltage sweep As already explained we can either perform a current or voltage sweep See Figure 26 Table 2 CC CV operating mode on supply load side Supply Load Curve Remark Constant voltage CV Constant current CC Blue aa Working argaotihe Limiting current area of the Constant current CC Constant voltage CV Red power supply Figure 26 CC CV curves for supply and load Voltage Supply Constant Voltage CV gt Current fixed by Load Supply Constant Current CC 2 Voltage fixed by Load Current To ensure maximum speed all the measurements are first collected by the firmware and then sent to the PC This is why it may take some time between when the measurement begins and the graph is shown d DoclD027041 Rev 1 UM1832 Running the GUI 6 6 1 Chart controls The graphical chart has some very useful tools e The main operations are Table 3 Chart Control using keypad and mouse Action Effect Single click Full view OV OA Max V Maxl Ctrl click and select area Zoom on selected Area Mouse wheel Zoom in zoom out center of the chart Mouse wheel click Full screen Move mouse on a data point Display V I measurements green box Move mouse on the
37. ed Dual Output DCDC 5V gt 12 amp 12V Murata U23 NMK0512SC Isolated Dual Output DCDC 5V gt 12 amp 12V Murata U25 LD2981ABM33TR IC VOLT REG3 3V 100MA 5 PIN SOT 23 STMicroelectronics U26 LD2981ABM33TR IC VOLT REG 3 3V 100MA 5 PIN SOT 23 STMicroelectronics U5 LM358AD Dual op amp 1 1MHZ rail to rail SO8 STMicroelectronics Y2 16MHZ XTAL 16MHZ 30PPM 10PF 5x3 2 FOX Electronics d DoclD027041 Rev 1 55 58 References UM1832 12 References 1 SEAO1 Constant voltage and current controller with online digital trimming http www st com web catalog sense_power FM142 CL1454 SC276 PF2556 74 2 L6566B Multi mode controller for SMPS http www st com web catalog sense_power FM142 CL1454 SC352 PF 185802 56 58 DoclD027041 Rev 1 d UM1832 Revision history 13 d Revision history Table 6 Document revision history Date 29 Oct 2014 Revision 1 Initial release Changes DoclD027041 Rev 1 57 58 UM1832 IMPORTANT NOTICE PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections enhancements modifications and improvements to ST products and or to this document at any time without notice Purchasers should obtain the latest relevant information on ST products before placing orders ST products are sold pursuant to ST s terms and conditions of sale in place at the time of or
38. ers protection mode On the STEVAL ISA161V1 the OVP is wired in auto restart mode so the supply recover after approximately 2 seconds Figure 41 Snapshot of supply going into OVP mode b Agilent Technologies MON NOV 18 11 51 22 2013 AX 2 16000000000s 1 AX 462 96mHz AY 1 0 0V pe 1 Recall Default Press to Quick Print m d J Setup Save m Sav F Supply sometimes produces clicking sounds on the STEVAL ISA161V1 The STEVAL ISA161V1 produces some audible clicks when it enters OCP overcurrent protection mode the switching is abruptly stopped The supply is prone to entering OCP mode when the output voltage is too low this is possible for instance in manual mode when the load is operating in CV move with a voltage target that is too low e between 8 and 12 V the supply produces audible clicks but will resume operation e below 8 V the switching controller supply enters OCP as soon as the load is applied In order to use the STEVAL ISA161V1 under normal operating conditions choose a CV voltage greater than 12 V Power supply continuously produces clicking sounds on the STEVAL ISA161V1 If the STEVAL ISA161V1 is continuously producing audible clicks this normally signifies overcurrent protection mode DoclD027041 Rev 1 Ly UM1832 Troubleshooting If this occurs even when the load board is disconnected from the PC it means the power NMOS has been damaged and
39. guration Force SEA Port 1 amp 2 ground to Main ground 60 like L o JI Ge Power Supply Timings Seguencer Graph Manua Start rs Off ms 50 5 i Averace Sample Voltage 32 32 Timings Default timings are optimized to guarantee safe operating conditions while minimizing execution speed Unless there is something specific to check it is NOT recommended to change timings Timings are defined for both graphic operations timing controlled by MCU firmware or manual mode timings controlled by the PC Table 4 Timings Parameter Description Delay between load activation and first ADC measurements this is Start ms basically in order to take into account both the supply amp load loops settling time Off ms This is the delay between two consecutive ADC measurements the delay is smaller than Tstart given the fact the loops have already settled Next ms Same as start but for subsequent load activation Average Sample Number of ADC averaging for both voltage and current measurements Force SEA ground By default it is assumed the SEA01 ground is grounded by the power supply not the 4 wire flat cable so the box is un checked See Section 4 5 Grounds for SEA01 ports 1 and 2 for further details DoclD027041 Rev 1 33 58 Configuration UM1832 7 3 Temperature This parameter specifies the maximum heat sink temperature Above th
40. he nominal voltage used during current trimming the ratio must be between 50 and 95 Then click the Trim button Once the trimming is achieved the status box displays the current trimming step and the associated effective limitation current OTP Programming operation Once voltage and current have been trimmed the user can program the trim value in the SEAO1 chip see Figure 21 The SEA01 OTP fuse operation requires Ve to be greater than 17 V if the SEAO01 Ve hence nominal voltage of the supply is lower than this value the on board supply generating 19 V can be enabled by activating the SEA external power supply check box d DoclD027041 Rev 1 UM1832 Running the GUI 6 5 4 Figure 21 OTP programming SEAO01 VRefV 0 6 2 485 TS19 el VRefl o e 30 000 TS0 NVM NVM Available 1 Status Reload 19V generation Checkbox Manual operation How to set manual operation Go to the main tab and click the active load control button Manual operation See Figure 22 is perhaps the most interesting mode because you can play with the SEAO01 and the active load as if you were using real laboratory instruments Figure 22 Manual operation tab Men Curent Vs Voltage Control of POWER SUPPLY TRIMMING BOARD SEA01 9750 i5 LOAD e Load CC SEAO1 Instantaneous VR V 0 6 2 485 TS19 Current Control of Vell o 30 000 750 v Voltage SEA01
41. hooting Figure 39 Detail of the Y cap implementation 8 4 Transient peak current when load is operating in CC mode on the STEVAL ISA161V1 When the load is operating in CC mode e g CV_target 18 V and CC_lim 2 A the eLOAD will exhibit a small transient peak current of about 200 300 us for a low CV target In some cases the peak current can trip the OCP protection from the supply for a short duration This is due to the CC loop limiting the current by changing the feedback of the CV loop This is absolutely not related to the SEA01 behavior Note Remember also that the current is burst as the on board heatsink is very small and unable to sustain steady state operation To mitigate this the load is constantly engaged disengaged like in PWMs Figure 40 Transient during CC mode operation CC 2 A left CV 18 V right CV 12 V u oa D a 8 5 Supply enters protection mode during voltage trimming on the STEVAL ISA161V1 If the user performs a large negative step for the voltage reference during manual trimming the supply will go into protection mode for a small duration typically 2 1 s at light load d DoclD027041 Rev 1 37 58 Troubleshooting UM1832 8 6 8 7 38 58 This is expected behavior see Figure 41 where we switch from Vref 3 to Vref 3 as the output voltage is higher than the target the L6566B switching controller detects an OVP overvoltage condition and ent
42. ia Sri zua ZA sr A 3 Uwe oa n En WNT oua lt lt Ve oe Ce TL EL Zeng da8 a S y a Ke DREI 8 1 OlQMS SWLC _ 9 s IOLE Wis oe ISMIrU Wis oe ii z ZN Wis oe gt eaa WA Kei e OZLO HNSH qus ed 40 st QvOTN3 em Ri zva Ob gt BAE AGA sha zan Nose Xx aes OLLO HINSH eed 0240 0WSH 01008 aaa N33HO za sa 4031 gt ein Ko ms ou NidHO a BAE AGA 41 58 DoclD027041 Rev 1 UM1832 Board schematic Figure 44 CC CV loop OISHOPLOZOLHLOdSO aana yN dWaL Oe 9zl amp 19s I od vas y 2801 dW3L vas ozi vas Sov EI EI eed Sen LVAE E OVILOL an Navon lt E li punar EH wou poesi si ZO BULLEN ii 1osueg duet A D yutsyeot uo JegeBor payunoyy A AGA BAE ad 30071 Loves 19245 Arddns samod ur T QNO 0i pooueveje SV Ap SION 1g az esuog E Tz LEE STAND gr NUINMHSA lt lt 4 KT Wane Wana EO aen d UNnHSA ju ZH 7 4 980 Mit dO Mb lt gt NWOSZ imo t Ier WT TA wur waua amp worova ZEZA LIE SOM E or ziki SdL WONS VANS woe doo uoge zuan TT YORE n I dN JL 001 hg IH asya Seu ea YA 788808 n lt avoT Na oro IT mei wee xo WY NZ ved A L anor 919 vaL ob oey BAE AGA ezissa 60 5 v awe NO Uum uinuieuil s Molly asn au s vopeyui d W ano wana pe wen E4SZNO9Ld1S AN ey 190 Jdote io d e uo KT EE a zu 90 Tre 360
43. iforme RS M13 SPACER 5MM SPACER M3 5mm Female Female Richco M14 SCREW M3x6 Screw M3 6mm Cruciforme RS M15 SLICER M3 Slicer M3 with break RS M16 SLICER M3 Slicer M3 with Break RS M17 SLICER M3 Slicer M3 with Break RS 50 58 DoclD027041 Rev 1 er UM1832 Bill of material Table 5 Bill of material continued Ref Value Description Manufacturer M18 SLICER_M3 Slicer M3 with Break RS M19 SLICER_M3 Slicer M3 with Break RS M2O SLICER_M3 Slicer M3 with Break RS M21 CLIP_TO220 Clip for TO220 TO247 heatsink Fischer Elektronik M22 CLIP TO220 Clip for TO220 TO247 heatsink Fischer Elektronik M23 MicroMatch_4pt Flat cable 1 27 mm 250 mm 4 CTS Micromatch TE Connectivity M24 USB A_Mini B USBA to Mini B Cable 1 5m long u o OPTICAL_TARGET Optical_target ie x OPTICAL TARGET Optical target ib OPTICAL TARGET Optical target Q6 BC848BL XSTR GEN PURP NPN 30V 100mA 300mW SOT 23 ON Semiconductor Q7 STP160N75F3 NMOS 75V 120A TO220 STMicroelectronics Q8 BC848BL XSTR GEN PURP NPN 30V 100mA 300mW SOT 23 ON Semiconductor Q9 BSS123 NMOS 100V 0 17A SOT23 DiodesZetex Q10 BC848BL XSTR GEN PURP NPN 30V 100mA 300mW SOT 23 ON Semiconductor Q11 BC848BL XSTR GEN PURP NPN 30V 100mA 300mW SOT 23 ON Semiconductor Q13 BC848BL XSTR GEN PURP NPN 30V 100mA 300mW SOT 23 ON Semiconductor Q14 BC848BL XSTR GEN PURP NPN 30V 100mA 300mW SOT 23 ON Semiconductor Q15 BSS123 NMOS
44. is threshold the system disables the load and prevents any new operation until the temperature decreases Note We strongly recommend leaving this setting unchanged d 34 58 DoclD027041 Rev 1 UM1832 Troubleshooting 8 8 1 8 2 d Troubleshooting No LED activity is observed on the trimming board Usually when the board is plugged onto the system e LEDDI lights up indicating the MCU has booted and the power supply is present e LED D4 then lights up indicating the USB port has been enumerated correctly If none of the above occurs it may be due to power supply issue e Locate Fuse F1 near the USB connector see Figure 36 and check the voltage between J6 ground shield and the right side of the fuse if it is not 5 V 10 an overcurrent has blown the fuse e Before replacing the fuse 0 5 A try to determine the root cause Figure 36 Fuse location USB yellow LED turns off after 3 or 4 seconds The yellow LED D4 is wired to the USB suspend signal from CP2102 this means it only lights when the USB port is not in USB suspend mode By default under Win7 Win8 the system forces external devices into suspend mode to save power which is what happens when the COM port is not being used It does not mean the power supply is shut down just that the CP2102 has entered low power mode To avoid this open Device Manager select the SiLabs COM port open the Power Management tab see Figure 3
45. low the nominal voltage e g 19 2 17 V Set limit above the expected current limitation of the supply e g 6 A it does not impact the measurement as the current is limited by the supply itself this time Play with the IrefV Trimming knob of the SEAO01box and observe the variations in the current limitation The load is operating in CV mode 16 899 V measured for a target of 17 V d DoclD027041 Rev 1 UM1832 Running the GUI Figure 24 Manual operation load in CV mode playing with current trimming Man Curent Ve Votage 7 POWER SUPPLY 3750 TRIMMING BOARD Impacts lout Vrefl Chip NVM Available 1 Status Reload Bm Warning Do not maintain these load conditions for too long as the power dissipated by the load in this case is 17 3 7 A 63 W The GUI will automatically disable the load when the heat sink temperature reaches 60 C but it is better to avoid stressing the load 6 6 Voltage current graph This feature plots a voltage vs current graph by performing a current or voltage sweep providing a very convenient graphical view of the supply behavior see Figure 25 Figure 25 V I graph tab Man Carr Ve Varage Current Current Sweep in A CC mode Stat 0500 E Stop 4000 G Step 0200 12 7 Autodetect Make Measurement Sweep Voltage Sweep in V CV mode Voltage Sua 1900012 Stop 1200 2 Sep 0500 E Make Measurement Sweep VI cl
46. mm Pad 6mm FIX3 HOLE 3 2MM 6 Through hole drilled 3 2mm Pad 6mm FIX4 HOLE_3 2MM_6 Through hole drilled 3 2 mm pad 6 mm HS1 SK480 50 SA Extruded heatsink 4 2 K W 50x28x10mm Fischer Elektronik J1 CON 10x2 Conn 20p dual row platted 2 54mm vertical Molex J2 CON 8x2 Conn 16p dual row platted 2 54mm vertical Molex J3 CON AMP FLAT 4P Micromatch on board connector 4 ways M EUN JA CON AMP FLAT 4P Micromatch on board connector 4 ways Sonido J5 CON AMP FLAT 4P Micromatch on board connector 4 ways Pie J6 UX60SC MB 5ST Conn mini USB2 0 SMT HIROSE J7 GMKDS 3 2 7 62 2 Connector 2 way with screen 7 62mm pitch Phoenix Contact J8 GMKDS 3 2 7 62 2 Connector 2 way with screen 7 62mm pitch Phoenix Contact J9 GMKDS 3 2 7 62 2 Connector 2 way with screen 7 62mm pitch Phoenix Contact L1 120R Ferrite bead120 O 2 A 0603 Murata L4 120R Ferrite bead120 O 2 A 0603 Murata L5 120R Ferrite bead 120 O 2 A 0603 Murata L6 120R Ferrite bead 120 O 2 A 0603 Murata M2 CLIP_TO220 Clip for TO220 TO247 heatsink Fischer Elektronik M4 SPACER_5MM Spacer M3 5mm female female Richco M5 ISOLATOR_TO220 Heatsink electrical isolator TO220 0 18mm Bergquist M6 SCREW M3x10 Screw M3 10mm Cruciforme RS M7 SCREW M3x10 Screw M3 10mm Cruciforme RS M8 SCREW M3x6 Screw M3 6mm Cruciforme RS M9 SPACER 5MM SPACER M3 5mm Female Female Richco M10 SCREW M3x6 Screw M3 6mm Cruciforme RS M11 SPACER 5MM SPACER M3 5mm Female Female Richco M12 SCREW M3x6 Screw M3 6mm Cruc
47. nF 50V X7R 0603 Murata C53 2 2UF CAP CER 2 2uF 6 3V X5R TDK C54 2 2UF CAP CER 2 2uF 6 3V X5R TDK C55 1UF CAP CER 1UF 16V X5R 0603 TAIYO YUDEN C56 1UF CAP CER 1UF 16V X5R 0603 TAIYO YUDEN C57 2 2UF CAP CER 2 2yF 25V AVX C58 10UF CAP CER 10yF 25V X5R 1206 Murata C59 100NF CAP CER 100nF 50V X7R 0603 Murata C60 100NF CAP CER 100nF 50V X7R 0603 Murata C61 100NF CAP CER 100nF 50V X7R 0603 Murata C62 2 2UF CAP CER 2 2uF 6 3V X5R TDK C63 2 2UF CAP CER 2 2uF 25V AVX C64 NP CAP NP 1206 C65 NP CAP NP 1206 C66 NP CAP NP 0603 C67 10NF CAP CER 10nF 25V X7R 0603 AVX C68 1NF CAP CER 1nF 50V X7R 0603 Murata D1 GREEN LED Green 0805 Avago D2 GREEN LED Green 0805 Avago D3 RED LED Red 0805 Avago D4 YELLOW LED Yellow 0805 Avago D5 RED LED Red 0805 Avago D6 BAS16 DIODE SWITCHING BAS16 85V 0 5A 4nS SOT23 3 NXP D8 BAS16 DIODE SWITCHING BAS16 85V 0 5A 4nS SOT23 3 NXP D9 BAS16 DIODE SWITCHING BAS16 85V 0 5A 4nS SOT23 3 NXP D10 BAS16 DIODE SWITCHING BAS16 85V 0 5A 4nS SOT23 3 NXP D11 1 22V Precision MicroPower Shunt Voltage 1 22V 0 1 NS F1 0 500A FUSE 0 500A 63V SLO 1206 SMD Littelfuse er DoclD027041 Rev 1 49 58 Bill of material UM1832 Table 5 Bill of material continued Ref Value Description Manufacturer FIX1 HOLE 3 2MM 6 Through hole drilled 3 2mm Pad 6mm FIX2 HOLE 3 2MM 6 Through hole drilled 3 2
48. nasonic corp R80 330R 330R O 5 1 10W R81 22K 22K O 1 1 10W Panasonic corp R82 330K 330K Q 5 0603 SMD R83 330R 330R O 5 1 10W R84 330R 330R O 5 1 10W R85 4 7K RES 4 7K Q 5 1 10W 0603 SMD R86 OR 0 0 O 5 1 10W 0603 YAGEO R87 OR 0 0 Q 5 1 10W 0603 YAGEO R88 1 00K RESISTOR 1 00K O 1 10W 196 0603 SMD Panasonic corp R89 OR 0 0 O 596 1 10W 0603 YAGEO R91 NP RES NP 0603 R92 100K 100K O 596 1 10W Panasonic corp R95 OR 0 0 Q 596 1 10W 0603 YAGEO R96 OR 0 0 O 596 1 10W 0603 YAGEO R97 OR 0 0 O 596 1 10W 0603 YAGEO R98 OR 0 0 Q 5 1 10W 0603 YAGEO R99 OR 0 0 O 596 1 10W 0603 YAGEO R100 NP RES NP 0603 R101 OR 0 0 O 596 1 10W 0603 YAGEO R102 OR 0 0 Q 5 1 10W 0603 YAGEO R103 OR 0 0 Q 5 1 10W 0603 YAGEO d DoclD027041 Rev 1 53 58 Bill of material UM1832 Table 5 Bill of material continued Ref Value Description Manufacturer R104 330R 330R O 5 1 10W R105 330R 330R O 5 1 10W R107 OR 0 0 Q 5 1 10W 0603 YAGEO R108 6 8K RESISTOR 6 8K 1 8W 5 0 805 SMD R109 1K RES 1K O 5 1 10W 0603 SMD R110 2 2K RES 2 2KO 1 10W 596 0603 SMD R111 47K 47K Q 596 1 10W R112 OR 0 0 Q 5 1 10W 0603 YAGEO R113 NP RES NP 0603 R115 NP RES NP 0603 R116 OR 0 0 Q 5 1 10W 0603 YAGEO R117 OR 0 0 Q 596 1 10W 0603 YAGEO R118 10K 10K O 596 1 10W Panasonic corp R119 OR 0 0 Q 596 1 10W 0603 YAGEO R120 NP RES NP 0603
49. pply continuously produces clicking sounds on the a TEE KA NEE 38 9 Board schematic 40 10 Board layout ss ss ss he ERRARE REIRRRA ARE ERERR SRRRERERAG 46 11 Bill of material IA eee ak E ee Cees ewes TERES ERE YS 48 12 Reference fcc rrr 56 Ly DoclD027041 Rev 1 3 58 Contents UM1832 13 Revision history 57 d 4 58 DoclD027041 Rev 1 UM1832 List of figures List of figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Ly STEVAL PCCO19V1 evaluationboard 1 SEA trimming tool icon in the startprogram 9 Block diagram of the STEVAL PCC019V1 board 10 The 3 electrical domainsoftheboard 11 Connection for SEA01 on the secondary side isolated from mains 12 Connection for SEA
50. pplyandload 26 Legend of graph AUA eg kh a pO RUE E dn XR nnn d d 27 Tabular data 0 3 9 et aoa Xd aate eurer educa ssa inn bed axo Baas Ghee BRR A 28 Current sweep graph 28 Supply load regulation 29 Zooming on current limitation 30 Tabular data of supplyinlimitationmode 30 AutoDetect feature of current sweep 30 Voltage sweep graph andtabular 32 Configuration window see o sada de o kai Gle rr 33 FUSE location ix Ig goede wha ce aon SURE d Ade P rae d de OR Red a Daw Rae GIA 35 Disabling USB suspend mode of CP2102 36 Closing AC currents between isolated domain and main domain 36 Detail of the Y cap implementation 37 Transient during CC mode operation CC 2 A left CV 18 V right CV 12 V 37 Snapshot of supply going into OVP mode 38 Power supply section 40 SPELL 41 CC GCVIOOD re ccce d ue x ate Ra RN NR RE ERE Rr S eA RO m Eta t E Leti 42 SEAO1 interface andisolation 43 ADC reference and calibration
51. presents a very low impedance dead short to the supply usually when the temperature has breached the maximum rating Even though this should not happen it can occur when the user deliberately removes the thermal protection of the system In this case replace Q7 STP160N75F3 If user needs to operate at higher power for longer periods of time bigger heat sinks from Fischer Electronic with compatible footprints are available through the distribution channel Radiospare Ref 203 583 d DoclD027041 Rev 1 39 58 UM1832 Board schematic Board schematic 9 Figure 42 Power supply section 00S LIGPLOCOLPLOdSO Wd QNO ULEEWAVIBEZAI WEP po Kana PP OJ O ZN O ee etre DE e OSST AS SU Am ele dez ine SS en Kees Inon NIA D s z Snq OZI 10 p p u s EAE peielosi NON NA anzz san Pino NI I kal DE OSELSOXWN ezn Ls S NA Sfi AS Ocl ureuioq peyelos GE ureuog gsn od Navon 3 31 dN sent oe wayo ooi s080 E 8013 m E GEM na SS anzz eent ou gie NH ma Ven gt ARE pow AR onoAMSH L yo o 96u MOTIBA koka Mojaq se awes y uj ejs Ajuauno os einooJd oj va gen
52. s JR SEA Trimmin g Tool y SEA Trimming Tool 1 1 Jb SPINFamily Evaluation Tool J STM32 ST LINK Utility Je Symantec Endpoint Protection Ji TINA VPNT JR UltraCompare Any previously installed versions of the software must first be uninstalled with the uninstall feature in Windows Control Panel GUI installation without installer If the user does not want to use the installer the GUI executable and DLL files are also available e Copy the two files to a local folder e Create a shortcut pointing to the executable on the local folder SEATool exe DoclD027041 Rev 1 9 58 Hardware description and setup UM1832 4 Hardware description and setup 4 1 Block diagram Figure 3 Block diagram of the STEVAL PCC019V1 board STM32F3 1 Isolation GPIOs MCU SEA01 I2C buses S Trimmable Reference Resistive ABE Divider DAC VTARGET Isolated Supply CV Loop USB gt 5V 24V Wal LOAD EN Anti Steadystate i protection USB UART DAC ILIM CC Loop bridge H ADC 12C bus 4 2 Power supply section The STEVAL PCC019V1 is self supplied through the USB connector 5 V supply This voltage directly supplies U18 and related circuitry Three isolated DC DC modules U20 U22 and U23 are used to provide the correct supplies to the remaining part of the board maintaining the isolation between the PC and target sides e U20 5V to 5 V and 15 V MCU 5 V then 3V3 and the CCCV circuitry e
53. when the CP2102 has been recognized enumerated by the operating system 4 4 Isolation The galvanic isolation between the USB side and I2C side is very important because it allows the target to have any potential without electrical problems For example if the SEAO1 is placed on the primary side of an SMPS its ground is directly connected to the rectified mains If the interface board has no isolation the ground of the USB connector connected to the earth inside the PC will cause a short circuit on a rectifier bridge diode damaging the SMPS and the connected hardware In order to fulfill all possible SEAO1 application needs the board embeds three I2C ports one of which is also isolated from the main domain by U12 Figure 4 The 3 electrical domains of the board STEVAL PCCO1I9V1 S Sp M USED domains ep Isolated USB domain Main domain DE CP2102 STM32 USB UART Bridge MicroController CC CV Load SEA Port 1 SEA Port 2 SEA Port 3 This allows trimming of the SEA01 in various configurations primary secondary side or even multiple SEAO1 chips Jet be bn be E be ebben rn bn EEN mm P SEAO01 on the secondary side In this case either Port 1 or Port 2 can be used d DoclD027041 Rev 1 11 58 Hardware description and setup UM1832 4 5 12 58 Figure 5 Connection for SEA01 on the secondary side isolated from mains TEVAL PCCO019V1 omains an 4 U U U U U
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