VW1 User`s Manual
Contents
1. Supply BY O rad VIN li a Voltage e S Reference MCU m e PGD lq gt PON OUTPUT ADJUST ON OFF PGOOD Sa gt VIN SENSE B S See ISENSE ete enn nee GND a VREG SENSE 4 SLEW Linear VO eS Current Regulator Load VO i Sense aay i r7 aa Switch REG Indicators VW1 displays voltage current and status information on two LCD readouts and two LEDs Table 1 INDICATOR DESCRIPTIONS Indicator Name Description Volts Display Displays regulator voltage Amps Display This display has two primary modes Output current mode Displays load current Current trip level Displays current trip limit indicated by an L Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 3 ViS3LTWERKS wow revilycco BY REVELY MICROSYSTEMS Controls The VW1 front panel includes two push buttons and two 25 turn adjustment trimmers Control Name Description On off button Press to turn the power output on or off Hold for 6 seconds to initiate a voltage calibration see calibration section Mode button Press to toggle between Amps display modes Hold for 6 seconds to initiate a current calibration see calibration section Voltage adjustment Adjusts the regulator voltage Current trip adjustment Adj2. e Low voltage digital circuit development and testing e Analog circuit characterization e Robotics transportation and automotive e Burn in and cycle testing Features Voltage Output e 0 8 4 5V output with 5V or USB style supply e 0 8 10V output with 12V source e 5mV voltage precision noise less than 2mVPP Current output e 500mA output from powered USB port e Upto 1 2 A from other power sources e Adjustable current trip Other e 4 digit LCD voltage and current meters e Built in thermal voltage and current shutdown e Push on off power button e Digital control via Power Good Output and Enable Input e Small 107x36x23mm size 4 21 x 1 43 x 0 91 e Screw holes and DIN rail option Part Numbers and Contents Orderable Part Number Power Source Included Output capability using included power source VW M1 U 24AWG USB cable 4 5V 500mA VW M1 5V 5V 2 0A AC adapter USA plug 4 5V 2 0A VW M1 12V US 12V 1 0A AC adapter USA plug 10V 1A VW M1 12V EU 12V 1 0A AC adapter Europe plug 10V 1A VW M1 12V UK 12V 1 0A AC adapter UK plug 10V 1A Each kit includes VW1 Power supply screwdriver adjustment tool screw terminal blocks and output cables Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 2 V LTWERKS wwrevely com BY REVELY MICROSYSTEMS VW1 Block Diagram Figure 1 VOLTWERKS VW1 BLOCK DIAGRAM LL ul USB Internal power Power gt FAULT TRIP MODE
3. Adjust VW1 voltage output until DVM reads 4 500V 2mV Press and hold the On Off button for 6 seconds Output power will cycle off then on The volts display will now read 4 500V dE ct E Voltage measurement calibration is now complete Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 11 V LTWERKS BY REVELY MICROSYSTEMS www revely com Amps Calibration The amps measurement calibration procedure is a two step process First the offset is calibrated with the power off and then the gain is calibrated with a known load current Offset calibration 1 If necessary press the On Off button to turn off the power supply output green LED is off 2 Press and hold the MODE button for 6 seconds 3 After 6 seconds the Amps display will read 0 000A Gain calibration 4 Connect a resistive load and calibrated Ammeter in series on the output terminals of VW1 Accuracy of the Ammeter should be better than 1mA when measuring 0 5Apc The resistor value is not critical but a value around 10Q with a 5W or higher power rating is recommended If necessary press the On Off button to turn on the power supply output green LED is on Adjust VW1 voltage output until Ammeter reads 400mA 1mA Press and hold the MODE button for 6 seconds After 6 seconds the Amps display will read 0 400A po d E EA Amp measurement calibration is now complete Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 12 Vi3LTWERKS wwrevely com BY REV
4. Asserting PON to a logic low will turn ON the output of the supply independently of the On Off push button An internal pull up resistor keeps PON normally at a logic high level For systems that require always on power PON can be wired to GND directly or through a switch or relay contact Alternatively ON can be controlled by an external digital signal The Specification section of this document details the logic threshold levels POK Output Signal OK is an active high digital output signal with 3 3V logic levels A logic high output indicates the VW1 power output is on and valid A logic low output indicates output power is off and or there is a fault Slew rate Configuration VW1 provides a controlled turn on slew rate for main output terminals Refer to the Specifications section of this document for slew rate characteristics Turn off slew rate is not controlled and is a function of the load current and load capacitance Slew rate can be decreased by connecting a capacitor between the SLEW terminal and GND The slew rate is calculated as follows 33u Slew Rate m V s The slew rate can be decreased from the default value but it cannot be increased Operation VW1 uses a linear regulation system consisting of a regulator controller and a discrete MOSFET as the series power control In normal operation the regulator is always enabled The regulator is directly adjusted by the voltage adjust trimmer The MCU s main tasks
5. ELY MICROSYSTEMS Self test VW1 has an internal self test procedure that validates internal functionality A 5V power supply and a 10 ohm 596 resistive load must be attached before initiating the test Testing must be done with the VW1 at or close to room temperature since the test is used to calibrate the internal temperature sensor The limits for this test are fairly wide since calibration may not be valid at this stage Start with the input supply power turned off Hold down both push buttons while applying 5V power The self test sequence will run automatically as follows 1 CountO F on each LCD digits on all displays This is a manual test to observe LCD segment operation No fault codes will be reported 2 The test sequence starts with the power off Then it confirms that load current is close to zero The amps LCD reports Fault 1 if load current reading is not less than 10 mA 3 Check input supply voltage is close to 5V If supply voltage measures less than 4 90V then Fault 2 is reported If the supply voltage is high than 5 45V then Fault 3 is reported 4 Check regulator output voltage is greater than 0 8V If too low then report Fault 4 5 Check that output terminal voltage is close to zero Report Fault 5 if the reading is greater than 13mV 6 The test sequence now turns on the output switch then checks that output voltage is close to the regulator voltage The actual level is not critical Difference between voltages must b
6. V LTWERKS BY REVELY MICROSYSTEMS VW1 Quick Start Guide Connect power source here y 0 here for USB power source Press the Mode Adjust voltage using switch to view the screwdriver tool ns deuel If Fault LED flashes a the selected voltage Adjust current trip if is too high necessary Press On Off switch to supply power to the load Connect output to load using and terminals Faults are indicated by a flashing fault LED The most common fault is when the output voltage is set too close or above the input voltage Simply adjust the output voltage to correct this WO UU UU UU UU UU UL Current Voltage Over Regulation Load Fault MCU Brown Input over Trip Fault Range Fault temperature Fault out voltage WARNING When using the 5 16V input terminals to supply power do not connect a USB cable The supply voltage present on the USB connector may exceed 5V and may damage any connected USB device or power supply WARNING Do not exceed the current amp rating of a USB port when powering the VW1 power supply Set the VW1 current trip to a value no higher than the capability of the power source Most USB ports are protected against over current but this should not be assumed CAUTION The aluminum surface on the back of the VW1 power supply will get hot under some load conditions Take care when handling the power supply ViXLTWERKS BY REVELY MICROSYSTEMS VW1 User s Manua
7. are supervising system operation monitoring voltage and current and displaying information on the readouts The micro USB connector is for USB style power only and is not a USB control interface Most applications should use the main output terminals to allow VW1 to switch output power on and off The main output provides controlled slew rate fault handling and short circuit protection In some specialized applications the voltage drop across the output switch might be a consideration The R terminal allows direct connection to the regulator but without the benefits of the main output switch such as slew rate control Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 6 V LTWERKS wiwrevely com BY REVELY MICROSYSTEMS Note that the VW1 output switch has an internal resistance of just 0 0025 Ohms typical so in most applications the voltage drop will be less than the wire connections Therefore the main terminals provide satisfactory performance Mechanical outline Dimensions are in millimeters iU Mounting options VW1 has two tapped 4 40 mounting holes on the back of the enclosure The holes can be used directly for in system mounting or used with a DIN rail mounting clip Winford DINM12 RC Screws must not extend more than 1 8 into the VW1 unit Excessively long screws may cause permanent damage Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 7 Vi3LTWERKS wwrevely com BY REVELY MICROSYSTEMS Moun
8. dapter Specifications Part Number VW M1 5V Specification summary for the included wall adapter e Input voltage range AC 100 240VAC e Input Frequency 50 60Hz e Output voltage 5 0V 5 10W e Compliance RoHS CEC Level V UL cUL For additional information on this Wall Adapter refer to the Volgen KTPS10 Series datasheet Part Number VW M1 12V US VW M1 12V EU and VW M1 12V UK Specification summary for the included wall adapter e Input voltage range AC 100 240VAC e Input Frequency 50 60Hz e Output voltage 12 0V 5 0 12W e Compliance US model RoHS CEC Level V UL cUL e Compliance EU and UK Model RoHS CEC Level V EN 60950 1 CE EMI EMC EN 55022 Class B AS NZS CISPR 22 Class B EN 61000 3 2 3 IEC 61000 4 2 3 4 5 6 8 11 For additional information on this Wall Adapter refer to the relevant CUI EPSA 12V Series datasheet Calibration The voltage and current measurement capabilities of VW1 are factory calibrated Refer to the electrical characteristics section for calibration limits While calibration guarantees the maximum limits for 1 year more frequent calibration will provide improved accuracy The calibration procedure is very simple Volts Calibration The voltage calibration procedure is 1 Connect a calibrated DVM to the output terminals of VW1 Accuracy of the DVM should be better than 1mV when measuring 5Vpc Press the On Off button to turn on the power supply output green LED is on
9. e less than or equal to 30mV or a Fault 6 is reported 7 Confirm that measured current is correct for a 10 ohm load The measured current must be within 60mA of calculated current If the measured current is too low then Fault 7 will be reported If the measured current is too then Fault 8 is reported 8 Check temperature reading and use the value for temperature sensor offset calibration Calibration data is automatically stored in non volatile memory if this test passes If the temperature reading exceeds the expected range of values then report Fault 9 If any test in the sequence fails addition test steps will halt and the fault code is displayed on the Amps display If all 9 steps pass then a PASS message is displayed A power cycle is needed to resume normal operation Compliance Information This device complies with Part 15 of the FCC Rules as an exempt test equipment device intended for use in a professional environment Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 13
10. ected in most applications Output Power Output ground connection Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 4 Vi3LTWERKS BY REVELY MICROSYSTEMS Fault Conditions Error Type Current Trip Voltage Range fault Temperature fault Loss of regulation Load fault Brown out or internal fault Over voltage fault Rev 1 0 Display HOOD Description Measured current exceeded set point current Output power is now off but regulated power is still available Resolution Press the Mode button to display current limit value XX XL and increase current trip point using the screwdriver tool Unable to guarantee regulation due to selected voltage ranges Root issues are a Input voltage is less than 4 5V b Output voltage is too close to input voltage less than 0 25V c Output voltage too low less than 0 70V d Output voltage is set too high Greater than 11 5V Resolution Adjust voltage trimmer to reduce output voltage and or increase the supply voltage to VW1 VW1 reports internal temperature with heat sink temperature exceeding 7OdegC Resolution Reduce the VW1 power dissipation by reducing load current reducing supply voltage and or increasing output voltage Internal regulator reports loss of regulation This fault can occur due to a severe over current or when the input supply voltage glitches Resolution Improve supply power quality and or remove fault on output terminals Outp
11. ed 3 tm en NN Operating temperature range max see table for SOA 0 5 C 2 2 Current trip speed time to shutdown at 100 of Itrip tbd ee eee eee ee POK open drain active output voltage imA 0 06 Power OK internal pull up resistance to 3 3V 102 en NNNM PON input Vil thresholdtoturn on oas PON input Vih threshold totum off da Fault Limits Parameter Mi Tye Mea Unt Input supply under voltagefault o o o 45 Input supply over voltagefault 21 V Ul Drop out voltage Vin Vout faut Output voltage maxmumvolagefaut 6 v 0 Heatsink Temperature fault 7 Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 9 ViS3LTWERKS wwrevely com BY REVELY MICROSYSTEMS Current trip fault user adjustable range 0 01 2 2 Absolute Maximum Ratings 1 Parameter Value Unit Input voltage continuous Input voltage surge for 1 second 24 wv Reverse input voltage continuous 06 v Reverse input current surge for 1second 4 PGD PON input voltage 1 Stresses above these ratings may cause permanent damage Maximum Output Current c Q pus pus QO Q rm O X gt Output Voltage V Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 10 Vi3LTWERKS wiwrevely com BY REVELY MICROSYSTEMS Power A
12. l This manual contains detail information on the operation and specifications of the VoltWerks VW1 power supply The VW1 linear supply provides adjustable DC power for lab and system use The 25 turn trimmers enable accurate and dependable voltage and current adjustment Overview Wired power input Power Control input Power OK signal 34 J Convenient J USB type power input Load current Fault one indicator Display mode Adjustable current trip Output voltage display Output indicator Voltage adjustment Slew rate Power output control input terminals Linear Operation The linear regulator provides very low noise output voltage Linear operation does mean that the power supply must dissipated heat to maintain regulation The maximum output current may be limited by the thermal capacity of the supply See output current section for additional information Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 1 ViXLTWERKS BY REVELY MICROSYSTEMS Feature Summary The VW1 linear supply provides adjustable DC power for lab and system use Unlike most lab power supplies VoltWerks has no clunky knobs Precision trimmers and a fast current trip keep accurate power available at the point of load Simple and dependable operation e Connect to included power supply or USB port e Adjust output voltage with screwdriver e Press ON switch to enable output Applications e Industry and University lab use
13. ting drawing A 4 40 Threaded Mounting Hole 2 places E 2 places I Screw Head 5 places 25 0 35 6 33 0 y 93 0 1l 34 3 DIN Rail Mounting Clip Position Y Y E 11 4 bat 11 4 Viewed from back of enclosure Output terminals this end Rev 1 0 VoltWerks VW1 Power Supply User s Manual Page 8 V LTWERKS yrww revely com BY REVELY MICROSYSTEMS VW1 Power Supply Specifications Characteristics Parameter Min Output voltage range using 5V power source 08 Output voltage range using 12V or greater power source 08 Output current o o as Lj Input supply voltage range Internal Power dissipation 25 C ambient P Vin Vout lload Oo e Drop out voltage lAload V Quescentcurentwithouputon 22 m Quiescent current with output off 16 m a NN Output noise with 2V 2A load wall supply 05 Output ripple with 2V 2A load wall supply a Output noise with 10V 1A load wall supply Output ripple with 10V 1A load wall supply mV pp a Voltage adjustment accuracy Lo dls w Voltage measurement accuracy full range calibrated 30 sm Voltage measurement accuracy over Vout 20 75 calibrated DEM EY e NU 2 1 ee _ 6 E _ NENNEN mV p p mV p p mV p p o sem Current measurement accuracy up to 1 5A calibrat
14. usts the current trip from 0 01 2 2 Amps Input Control Terminals A 4 way 3 5mm pluggable terminal block provides a power source input as well as I O signals for controlling and monitoring the VW1 s output state Replacement terminal block is Phoenix Contact 1840382 or equivalent 00 1 Name Description Power OK digital output 1 Output power is On 0 Output Power ON digital input with cena pull up resistor 1 On Off button controls power O force power always On Input Power input positive connection 5 16Vdc Input Power input ground connection WARNING When using the input terminals to supply power do not connect a USB cable The supply voltage present on the USB connect may exceed 5V and may damage any connected USB device or power supply The USB port cover should be glued in place to permanently protect against this Output Terminals Output power is available through a 7 way 3 5mm pluggable terminal block The terminal block also allows direct connection to the internal regulator and slew rate configuration Replacement terminal block is Phoenix Contact 1840418 or equivalent Terminal Name Description Direct connection to regulator output for bypassing output Pies mM ER Power ON digital input with internal pull up resistor 1 On Off button controls power 0 force power always On Slew rate control input Adjusts the turn on slew rate using external capacitance Leave unconn
15. ut voltage is more than 10mV from regulator output when output power switch is on Can be due short circuit or other load fault Resolution Verify that load does not exceed VW1 ratings The internal power rail has momentarily dropped too low Can be caused by glitches in supply rail low battery in battery powered systems Resolution Make sure that the supply voltage is always above 4 5V Over voltage fault Supply voltage limit exceeded so VW1 has shut down the output to try to protect the load Resolution Reduce the supply voltage and verify that VW1 has not been damaged by the over UU UU NOOO UU UU UU UUU UU UUU UU UU VoltWerks VW1 Power Supply User s Manual www revely com To clear Cleared when at next output power on event If output is off then cleared automatically otherwise cleared at next power on event Cleared at next output power on event If output is off then cleared automatically otherwise cleared at next power on event If output is off then cleared automatically otherwise cleared at next power on event Cleared automatically when valid power is restored Cleared when at next output power on event Page 5 V LTWERKS you revely com BY REVELY MICROSYSTEMS voltage condition Digital control VW1 has two digital signals that provide a simple on off and monitoring interface PON Input Signal ON is an active low digital input signal with 3 3V logic levels
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