ONS321A5VGEVB / ONS321B12VGEVB Evaluation Board User`s
Contents
1. Figure 1 Evaluation Board Photo Semiconductor Components Industries LLC 2012 2012 Rev 0 Publication Order Number EVBUM 2102 D ONS321A5VGEVB ONS321B12VGEVB SCHEMATIC OF THE ONS321G EVALUATION BOARD 180000 e THESIS fs ez SIZESNO JEQLUN juesuimaog HL ESHON EdEEd ON QHVOB TYAS Y f 300091129 FN m aig T nodad io ul FHA EHN ss AA dN WOR SIH MEN E FN Iz 5 gor ar I dN ZTH 0 ps ZEN LAN EN OW dua or i dN Y zH 39001 122 JA02 40051 ls x H XL El ELH FIH My J08 Jnigul ssg sz EIOLNZ Iro J AA Dis Nyd BAS mar dui ZH inoasia si aar U Tey gl 0 ESH BINS gsr Tl Kane SxS WE ini a anpor angor anoo anger anos angose nour Toe vez u 5 12 en 12 zz gal mal mode wel SOBPSdON AON m 2 az LET Dz A E a 5135 OWONI piat L 20 301A _ FOLA 5 OIA e zon LE X Jn 3 WAT NM NONAZI A 2 yzg 49002 32 y 0 Z V NDEGPS 0 ni Jnzz L erinezsugn a m INSDEFOLN INS 23 EFF b gn Y Iz Feu T2. Oscillator probes at the desired test points 3 Set the driver voltage to the required value For example 5 V 4 After reaching the required driver voltage set the input voltage as required For example Vin 12 V 5 Set the load current slowly to the desired value For example Ipyt 2 5 A Refer to Start Up Procedure 4 6 The frequency is already set to 330 kHz If a different switching frequency is required R13 and R14 have to be changed as per the data sheet of 5386 Refer to Appendix 7 Connect the voltmeters multi meters to monitor the required parameters Refer to Figure 4 8 Obtain the required data and waveforms TEST RESULTS Efficiency Comparison between the Standard In house and ONS321G Evaluation Boards 94 Efficiency 90 84 4 Normal Evaluation Board ONS321G Evaluation Board Figure 5 Comparison of Efficiency for Standard In house and ONS321G Boards http onsemi com ONS321A5VGEVB ONS321B12VGEVB Efficiency Comparison of ONS321G Evaluation Board for 5 V amp 10 V 100 95 90 85 Efficiency 90 05 Iout Vdriver 5V m Vdriver 10V Figure 6 Comparison of Efficiency for ONS321G Board 5 V amp 10V Power Loss Comparison between the Standard In house and ONS321G Evaluation Boards Power Loss 2 Iout A 0 2 1 Boa
3. claims costs damages and expenses and reasonable attorney fees arising out of directly or indirectly any claim of personal injury or death associated with such unintended or unauthorized use even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part SCILLC is an Equal Opportunity Affirmative Action Employer This literature is subject to all applicable copyright laws and is not for resale in any manner PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT American Technical Support 800 282 9855 Toll Free Semiconductor Website www onsemi com Literature Distribution Center for ON Semiconductor USA Canada P O Box 5163 Denver Colorado 80217 USA Europe Middle East and Africa Technical Support Order Literature http www onsemi com orderlit Phone 303 675 2175 or 800 344 3860 Toll Free USA Canada Phone 421 33 790 2910 Fax 303 675 2176 or 800 344 3867 Toll Free USA Canada Japan Customer Focus Center For additional information please contact your local Email orderlit onsemi com Phone 81 3 5817 1050 Sales Representative EVBUM2102 D
4. used Controller Vin MAX for measuring the output voltage without any losses from the specification is 7 V cables or connectors The output voltage can be measured at the points J11 and J12 on the evaluation board Driver Biasing The driver positive voltage probe Vec should be connected to both pin 1 and 2 at J6 The driver voltage is defined depending on the type of driver installed 1 e a 12 V driver or a 5 V driver The ONS321G evaluation board is set up to accept DENS footprints of ON Semiconductor 5 V and 12 V drivers Monitoring the Switch Node Waveforms The ONS321G evaluation board provides the opportunity to monitor the switch node waveforms The probe socket at test point JS8 provides the switch node waveforms http onsemi com 3 ONS321A5VGEVB ONS321B12VGEVB Monitoring the High Side and Low Side Waveforms The high side waveforms can be obtained from the probe socket at test point 56 and the low side waveforms can be obtained from the probe socket at test point JS10 The probe sockets that are provided on the evaluation board for monitoring the waveforms are such that the oscilloscope probes can be inserted into the probe socket and are held in place The Test Point and the Probe Socket are shown in Figure 3 Monitoring the PWM Signal The PWM signal from the controller to the driver can be monitored from the probe socket provided at JS11 Probe Ground Lonnie ctor Probe Signal Connector Figure 3 Tektroni
5. ON are registered trademarks of Semiconductor Components Industries LLC reserves the right to make changes without further notice to any products herein SCILLC makes no warranty representation or guarantee regarding the suitability of its products for any particular purpose nor does SCILLC assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation special consequential or incidental damages Typical parameters which may be provided in SCILLC data sheets and or specifications can and do vary in different applications and actual performance may vary over time All operating parameters including Typicals must be validated for each customer application by customer s technical experts SCILLC does not convey any license under its patent rights nor the rights of others SCILLC products are not designed intended or authorized for use as components in systems intended for surgical implant into the body or other applications intended to support or sustain life or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application Buyer shall indemnify and hold SCILLC and its officers employees subsidiaries affiliates and distributors harmless against all
6. ONS321A5VGEVB ONS321B12VGEVB ONS321A5VGEVB ONS321B12VGEVB Evaluation Board User s Manual Description The ONS321G evaluation board is designed such that it can accommodate 4 SOSIC SOSFL parts 2 u8FL WDFNS parts or 4 DPAKs Depending on the type of application and necessity any combination of the above packages can also be used The ONS321G evaluation board is designed to operate with an input voltage ranging from 8 V to 19 V and to provide an output voltage of 0 8 V to 1 55 V for load currents of up to 25 A The ONS321G can be ordered with either 5 V or 12 V drivers but one can be installed at a time The ONS321G evaluation board has a number of test points that can be used to evaluate its performance in any given application Features e 5 V to 19 V Input Voltage e 25 A of Steady State Load Current R26 E LLL Nel ON Semiconductor http onsemi com EVAL BOARD USER S MANUAL e 330 kHz Switching Frequency Access to IC Features such as Enable Switching Node and VID Settings for Output Voltage e Convenient Test Points for Simple Non invasive Measurements of Converter Performance Including Input Ripple Output Ripple High Side and Low Side Gate Signals and Switching Node Applications e Synchronous Buck Converters High Frequency Applications High Current Applications Low Duty Cycle Applications e Multi phase Synchronous Buck Converters Evaluation board has only one phase implemented
7. T SDONMS 2 am Am UTAG INS M rey 82 T ASIOA 17075 ug NH3UNIGZ cr 0 i Ey I3 S VLNDEGFS 4LLN gy Theda IDA 0 JB 5D zn X18 ar nia TEH ER 22A 012 212 E 158A e L it pid Wr NORMALI T Ery 82 92 512 15 5 212 Jur szg ir Wig NESUNIdE NIA I com Figure 2 Schematic of ONS321G Evaluation Board http ONS321A5VGEVB ONS321B12VGEVB ELECTRICAL SPECIFICATIONS Table 1 ELECTRICAL SPECIFICATIONS FOR ONS321G Parameter osad contos _______ in Typ Max Unis _ _______ __ We Wwe _________ Output Characteristics Ouput Voltage Vin 12 V lout 25 155 V Voltage Lu wem vey 9 7 5 Lm emma 8 T9 n Fulloadeficenoy Vin 12 V Vout 1 2 V Varr 5 V lout 25 A output voltage can be changed by changing the VID settings For example to get an output voltage of Vo 1 2 V the Pins 2 VID1 3 VID2 and 4 VID3 should be set to 1 See Appendix for more information on setting the output voltage The pins 1 VIDO 5 VID4 and 6 VID5 should always be set to 0 and the pins 7 VID6 and 8 VID should always be set to 1 1 The switching frequency is defined by the resistors R13 and R14 and can only be changed only by changing th
8. e 11 PWM Signal at G1 for lout 0 http onsemi com 9 ONS321A5VGEVB ONS321B12VGEVB ii At Igut 20 A Vin 12 V Vout 1 2 V 10 V Freq 330 kHz Top Gate _ Phase Node Bottorn Gate Mar 27 Mini 14 2 3 Chi 5 04 Che 50V M 8D 0ns 12563 IT 160 5 0 5 v Chl Figure 12 PWM Signal at G1 lout 20A NOTE The efficiency power loss switch node and the PWM signal waveforms presented above are obtained with the 12 V driver NCP5901 but by setting the driver voltage at 10 V CIRCUIT BOARD LAYOUT Top Component Placement LET 056 Lm NM DR FS rida ev x ELELELELE ON Semiconductar ONS321G REV B Figure 13 Top View of the ONS321G Evaluation Board http onsemi com 10 5 5954s 16 4 ONS321A5VGEVB ONS321B12VGEVB Bottom Component Placement Top Copper Layer qm I 30 SENE HET EXE DENEL CEU er EL ELE 5e amp miconductar Figure 15 Copper Layer on the of ONS321G Evaluation Board http onsemi com 11 ONS321A5VGEVB ONS321B12VGEVB Internal Copper Layer 2 Figure 16 Internal Copper Layer 2 of ONS321G Evaluation Board Internal Copper Layer 3 Figure 17 Internal Copper Layer 3 of ONS321G Evaluation Board http on
9. e input and driver current can also be measured The connecting wires from the output terminal to the electronic load should be thicker in order to avoid losses and to measure the exact voltage at the end of the terminals flour Oscilloscope The oscilloscope is used to monitor the switch node waveforms This should be an analog or digital oscilloscope set for DC coupled measurement with 50 MHz bandwidth The resolution can be set at 5 V division vertically and 20ns division horizontally The oscilloscope channels can be connected at various test points such as High Side Driver JS6 Low Side Driver JS10 Switch Node JS8 G1 PWM Signal JS11 Vin sense J9 amp J10 and Vout sense J11 amp 112 TEST SET UP AND PROCEDURE Test Setup The test set up test points and components present on the ONS321G Evaluation Board are shown in Figure 4 http onsemi com 4 ONS321A5VGEVB ONS321B12VGEVB Vin sense Controller 43 ich Uo 8 we eS E lt cwm S 578 131 eil uus c sea 25 2 dh Il 5 0 205 101 Shunt Resistance Semiconducto ONS321G REV B SO8 SO8 FL LS Driver Switch Node Figure 4 Schematic of the Test Setup The SO 8 parts placed on the evaluation board are the Q1 Start up Procedure Q2 Q3 and O4 the u 8 parts placed on the evaluation board 1 Initially set all the power supplies to 0 V ar
10. e resistors R13 and R14 CONNECTORS AND TEST POINTS DESCRIPTIONS Input Power Switching Frequency Connect the input voltage positive probe to Pin 1 at J1 and The converter switching frequency is set by the voltage sense probe at J9 negative probe to the GND at Pin 2 at J1 divider setup of R13 and R14 between the pins 10 ROSC and sense probe at J10 The input voltage can range from 8 V and 33 AGND of the NCP5386 controller In order to to 19 V change the frequency these resistors have to be changed Changing the frequency also changes the lim Over Current Output Power shutdown threshold settings Connect the output voltage positive probe to J13 large screw connector and sense probe at J11 ground probe at J14 Test Points Description large screw connector and the sense probe to J12 The Monitoring the Input Voltage output voltage is set by the VID settings Refer to Appendix The input voltage can be monitored by using the test Section 1 points at J9 and J10 on the ONS321G evaluation board This allows the user to find out the exact value of input voltage Controller Biasin 9 since there will be no losses from the cables or connectors Connect the positive probe to Pin 2 at J5 and the negative m probe to the GND at Pin 1 at J5 Please keep this as a separate Monitoring the Output Voltage supply to avoid damage to the controller especially when The ONS321G evaluation board provides two test points other drive voltages are
11. e the Q9 and O10 and the DPAKs placed on the board right 2 Set the output voltage by changing the VID below the SO 8 parts are Q5 Q6 O7 and Q8 shown in the settings The output voltage should not be changed schematic of ONS321G Refer to Section 2 Figure 1 with either the controller or driver active 3 Set the driver voltage and then set the input Start up and Shut down Procedures voltage Before starting the test the oscilloscope probes should be 4 Set the load current to required value The load connected IR or k type thermo couples can be used to current must be incremented slowly to prevent the monitor the temperature of the parts to make sure that they transient spikes at CS1 CS2 thereby shutting down are still within the limits IR monitoring requires the removal of the oscilloscope probes due to beam interference input voltage must be set to zero then the power supply has to be turned off then turned and Vig re established http onsemi com 5 ONS321A5VGEVB ONS321B12VGEVB Shut down Procedure 1 Shut down the Load 2 Reduce the input voltage to zero and then shut down the input power supply 3 Reduce the driver voltage to zero and then shut down the driver power supply Test Procedure 1 Before making any connections make sure to set the power supplies for input voltage and the driver voltage at 0 V Also make sure that the load current is at 0 A 2 Connect the
12. rd Nonnal Evaluation Board Figure 7 Comparison of Power Loss for Standard In house ONS321G Boards http onsemi com 7 ONS321A5VGEVB ONS321B12VGEVB Power Loss Comparison of ONS321G Evaluation Board for 5 V amp 10 V gt 5 Power Loss W I3 Iout A Vdrvr 5V m Vdrvr 10V Figure 8 Comparison of Power Loss for ONS321G Board for 5 V amp 10V Switch Node Voltage Waveforms of ONS321G Evaluation Board for 5 V amp 10 V i At 20 A and 5 V Vin 12 V Vout 1 2 V Freq 330 kHz Top Gate 2048 5 3 bay 2 18v 18 23 5 44 5 0 Che 5 0 1 256348 Cha A Chi Figure 9 Switch Node Waveforms for 5 V http onsemi com 8 ONS321A5VGEVB ONS321B12VGEVB ii At 20 A and Varvr 10 V 12 V Vout 1 2 V Freq 330 kHz esca EE 10 23 2 18 471 5 4N ch OY Ghz 30 O 0ne 1 25G5 s IT 1860 Cha 5 0 By x b Figure 10 Switch Node Waveforms for 10 V 7 4 PWM Signals from the Controller to the Driver at G1 of ONS321G Evaluation Board for 5 V amp 10 V i At Iout 0 A Vin 12 V Vout 1 2 V 10 V Freq 330 kHz Top Gate 1r 2v 0Y 54147 493 7 13 21 1 562V Che Sv 90 07 1 2565 15 ps pt Cha Ch4 Uy A Chi Figur
13. semi com 12 ONS321A5VGEVB ONS321B12VGEVB Bottom Copper Layer Figure 18 Copper Layer on the Bottom of ONS321G Evaluation Board APPENDIX Table of AMD VID Settings for NCP5386B Controller Table 2 VID CONTROL SETTINGS FOR OUTPUT VOLTAGE o9 os 9 9 9 3m x 9 o o 9 o3 p oom ox o9 o9 o9 319 o 3 o o ox o9 o9 or o9 3 e w 1 425 0 5 1 400 0 5 1 300 0 5 1 275 0 5 http onsemi com 13 ONS321A5VGEVB ONS321B12VGEVB Table 2 VID CONTROL SETTINGS FOR OUTPUT VOLTAGE VIDA VID3 VID2 VID1 VIDO Nominal Vout V OG 9 GM x os o3 o p o9 oom oam 0 975 5 0 mV 0 950 5 0 mV 0 850 5 0 mV 0 825 5 0 mV 1 1 1 0 1 Pin Diagram of NCP5386B Controller 5386 NCP5386A NCP5386B 1 24 2 23 DAVON 3 2 5 4 csan L NCP5386 A B 1 2 Phase Buck Controller ce m Lio 2 GS1N 7 Down Bonded to B CMODI Exposed Flag 17 VFB 4 Figure 19 Top Vie w of the Pin Diagram of NCP5386B un 3 Switching Frequency of the Oscillator The switching frequency of the oscillator can only be For more information on NCP5386B see Data Sheet of changed by changing the resistors R13 and R14 5386 http onsemi com 14 ONS321A5VGEVB ONS321B12VGEVB ON Semiconductor and
14. x Test Point amp Probe Socket Part 700503100 TEST EQUIPMENT REQUIRED Voltage Sources 1 DC Supply Source for Input Voltage The input voltage source should be a 0 to 20 V DC source The input voltage may be increased further depending on the parts that are being used on the ONS321G evaluation board such that the part can withstand the applied voltage Hence based on the required input voltage to be applied the requirement of the DC power supply varies ii DC Supply Source for Driver Voltage The supply source for the driver should be a 0 to 20 V DC source The driver voltage varies depending on the type of driver used 1 e For NCP5911 driver the driver voltage is 5 V and for NCP5901 driver it is 12 V Electronic Load The electronic load supplied to the ONS321G evaluation board ranges from 0 A to 25 A Hence a DC current source of 0 A to 30 A is needed for the evaluation board Meters to Measure Voltages and Currents In the ONS321G Evaluation Board the voltages that are to be measured are Vig Vout and Vgqryr Similarly the currents that are to be measured are Iout and Idryr The set up for measuring these voltages and currents and the meters required are shown in Figure 4 The currents are measured across the shunt resistances that are connected across each of the terminals of input output and driver voltages as shown in Figure 4 For example the output current is Vout measured as Similarly th
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