Quick Start Guide - VW0 Power Supply VW0 User`s Manual
Contents
1. exempt test equipment device intended for use ina 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 VWO Power Supply User s Manual Page 122. 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 Note that the VWO 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 Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 7 V LTWERKS www revely com BY REVELY MICROSYSTEMS Mechanical outline Dimensions are in millimeters Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 8 VOLTWERKS ww revely com BY REVELY MICROSYSTEMS VWO Power Supply Specifications Characteristics Parameter Min Typ Max Unit Output voltage range using 5V power source 0 8 4 5 V Output voltage range using 12V or greater power source 0 8 10 2 V Output current 2 A Input supply voltage range 4 5 16 V Internal Power dissipation 25 C ambient P Vin Vout Iload 4 W Drop out voltage 1A load 0 2 V Quiescent current with output on 22 mA Quiescent current with output off 16 mA Output noise with 2V 2A load wall supply lt 0 5 mV p p Output ripple with 2V 2A load wall supply 1 mV p p Output noise with 10V 1A load wall supply lt 0 7 mV p p Output ripple with 10V 1A load wall suppl
3. test sequence will run automatically as follows 1 Count 0 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 Check input supply voltage is close to 5V If supply voltage measures less than 4 90V or higher than high than 5 45V then a fault is reported 3 Check regulator output voltage is greater than 0 8V If too low then report fault 4 Check that output terminal voltage is close to zero Report fault if the reading is greater than 13mV 5 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 be less than or equal to 30mV or a fault is reported 6 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 If any test in the sequence fails addition test steps will halt and the Red fault LED flashes If all 6 steps pass then the Green Output LED flashes A power cycle is needed to resume normal operation Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 11 VO LTWERKS BY REVELY MICROSYSTEMS www revely com Compliance Information This device complies with Part 15 of the FCC Rules as an
4. S POK Output Signal OK is an active high digital output signal with 3 3V logic levels A logic high output indicates the VWO power output is on and valid A logic low output indicates output power is off and or there is a fault Slew rate Configuration VWO 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 33uA Slew Rate iis Cslew V s The slew rate can be decreased from the default value but it cannot be increased Operation VWO 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 task is to supervise system operation monitoring voltage and control the output load switch 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 VWO 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
5. SB 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 Other e Built in thermal and voltage 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 Part Numbers and Contents Orderable Part Number Accessories Included Output capability using included USB cable VW M0 U USB power cable adjustment tool 4 5V 500mA output cables with alligator clips VW M0 none n a Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 3 V LTWERKS www evely com BY REVELY MICROSYSTEMS VWO Block Diagram Figure 1 VOLTWERKS VW0 BLOCK DIAGRAM FAULT USB Internal power Power gt Supply OUTPUT gt VIN ae oltage o S ene MCU ADJUST ON OFF Reference gt PON D Gr PGD gt PON x PGOOD GND GA ee ee enema gt VIN SENSE GND H EE d GND VREG SENSE lt op Linear 8 Current Regulator Load VO GY Sense Indicators VWO displays status information on two LEDs Table 1 INDICATOR DESCRIPTIONS Indicator Name Description Output Indicator Green LED illuminated continuously when power output is a
6. V LTWERKS www revely com BY REVELY MICROSYSTEMS Quick Start Guide VWO Power Supply Connect 5 16V 7 power source to terminals or to USB Adjust voltage using screwdriver tool If Fault LED flashes the selected voltage is too high Press On Off switch to supply power to the load Connect load to N terminals Faults are indicated by a flashing fault LED Simply count the flashes before the long pause to determine the fault code The most common fault occurs when the output voltage is set too close or above the input voltage Simply adjust the output voltage to correct this WARNING When using the input screw 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 VWO power supply Most USB ports are protected against over current but this should not be assumed CAUTION The aluminum surface on the back of the VWO power supply will get hot under some load conditions Take care when handling the power supply VWO User s Manual V LTWERKS BY REVELY MICROSYSTEMS www revely com This manual contains detail information on the operation and specifications of the VoltWerks VWO power supply The VWO linear supply provides adjustable DC power for lab and system use The 25 turn trimmer enables accurate an
7. ctive In standby operation output off the LED blinks periodically to indicate that input power is connected and no errors are present Fault Indicator Red LED flashes when an error occurs Count the flashes before the long pause to determine the fault code Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 4 Vi LTW E R KS www revely com BY REVELY MICROSYSTEMS Controls The VWO 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 Voltage adjustment Adjusts the regulator voltage 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 VWO s output state Replacement terminal block is Phoenix Contact 1840382 or equivalent aie Name Description Power Of digital output oe Output power is On 0 Output Power ON digital input with eT pull up resistor 1 On Off button controls power 0 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 a
8. d dependable voltage adjustment Overview Wired power input Power Control input ah Power OK signal Ve Convenient USB type power input Fault indicator Output indicator also blinks periodically in stand by mode Power switch Voltage adjustment Direct regulator output Slew rate control input ji S Power output 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 VWO Power Supply User s Manual Page 2 V LTWERKS ww revel com BY REVELY MICROSYSTEMS Feature Summary The VWO linear supply provides adjustable DC power for lab and system use Unlike most lab power supplies VoltWerks has no clunky knobs A precision trimmer keeps 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 q B Ta Applications e Industry and University lab use e Low voltage digital circuit development and testing e Analog circuit characterization e Robotics transportation and automotive T ke e Burn in and cycle testing Features Voltage Output e 0 8 4 5V output with 5V or U
9. i 53 1S s Q 4 gt e s x Maximum Output Current Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 10 V LTWERKS ww revely com BY REVELY MICROSYSTEMS 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 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 Self test VWO has an internal self test procedure that validates internal functionality A 5V power supply and a 10 ohm 5 resistive load is recommended before initiating the test Testing must be done with the VWO at or close to room temperature since the test is used to calibrate the internal temperature sensor Start with the input supply power turned off Connect the Control ON input terminal to then hold down the On Off push button while applying 5V power The self
10. the VWO power dissipation by reducing load current reducing supply voltage and or increasing output voltage Loss of regulation Internal regulator reports loss of regulation This 4 If output is off then fault can occur due to a severe over current or cleared automatically when the input supply voltage glitches otherwise cleared at next Resolution Improve supply power quality power on event and or remove fault on output terminals Over voltage fault Over voltage fault Supply voltage limit exceeded 5 Cleared when at next so VWO has shut down the output to try to output power on event protect the load Resolution Reduce the supply voltage and verify that VWO has not been damaged by the over voltage condition Digital control VWO 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 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 Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 6 V LTWERKS ww revely com BY REVELY MICROSYSTEM
11. vailable 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 R Direct connection to regulator output for bypassing output Output Power ON digital input with internal pull up resistor 1 Output On Off button controls power 0 force power always On S Slew rate control input Adjusts the turn on slew rate using external capacitance Leave unconnected in most applications Output Power Output ground connection Output Output Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 5 VeLTWERKS ww revely com BY REVELY MICROSYSTEMS Fault Conditions Error Type Description To clear Voltage Range Unable to guarantee regulation due to selected If output is off then fault voltage ranges Root issues are cleared automatically a Input voltage is less than 4 5V otherwise cleared at next b Output voltage is too close to input voltage power on event 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 VWO Temperature fault VWO reports internal temperature with heat Cleared at next output sink temperature exceeding 7OdegC power on event Resolution Reduce
12. y 2 mV p p Voltage adjustment accuracy 5 mV Operating temperature range max see table for SOA 0 50 C POK open drain active output voltage 1mA 0 0 6 V Power OK internal pull up resistance to 3 3V 10 2 kQ PON input Vil threshold to turn on 0 45 V PON input Vih threshold to turn off 1 7 V Fault Limits Parameter Min Typ Max Unit Input supply under voltage fault 4 5 V Input supply over voltage fault 21 V Drop out voltage Vin Vout fault 0 2 V Output voltage maximum voltage fault 10 6 V Heatsink Temperature fault 70 C Absolute Maximum Ratings 1 Parameter Value Unit Input voltage continuous 18 V Input voltage surge for 1 second 24 V Rev 1 0 VoltWerks VWO Power Supply User s Manual Page 9 VO LTWERKS BY REVELY MICROSYSTEMS www revely com Reverse input voltage continuous 0 6 V Reverse input current surge for 1 second 4 A PGD PON input voltage 6 V PGD PON SLEW ESD rating HBM 16 kV Power in out ESD rating HBM 16 kV Ambient or storage operating temperature range 70 C 1 Stresses above these ratings may cause permanent damage 3 5 3 2 5 2 Output Voltage V Figure 2 Operating Limits with 5V power source 55 4 5 Output Voltage V Figure 3 Operating Limits with 12V power source Power Adapter Specifications Part Number VW M1 5V Specification summary for the included wall adapter 0 0 c w Ha
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