EVBUM2233 - POWERPHASEG Evaluation Board User`s Manual
Contents
1. LLC 2014 April 2014 Rev 0 Publication Order Number EVBUM2233 D POWERPHASEGEVB SCHEMATIC OF THE POWERPHASEG EVALUATION BOARD SWS orsr ws NVd HA 2004Ne IHO 6 AGH HA TU 2 p m o io S f e e 8 43001 40001 40001 619 Oz L Nu ASIOA 40001 ce 0 O s0 380 SLY SH 39001 49001 4n0zp 4n0zp ez ve 62 82 ONO ONO H3MOd TWNOIS OO ozy StH 300WOVG 6 6b 6 a A A N40 SXS ZE NVJTHA Sandy danzt 2m EL OE NYa HA iz S98ESdON AGH HA 82 AGH HA IE N3 0373S GIONS ce OGIA DJA WAUA ELT0ELWHGW ISSA x gt z M HS LL YOO eae ry ot NOWAZI A r FV 62H ezu oz snzz anz anzz snzz snzz snzz ery 812 319 S19 ro elo zio Dy imna 2 ub szo ir Wid WUJLNIdE NIA Figure 2 Schematic of the POWERPHASEG Evaluation Board http onsemi com POWERPHASEGEVB ELECTRICAL SPECIFICATIONS Table 1 ELECTRICAL SPECIFICATIONS FOR POWERPHASEG USING NTMFD4C85N Input Characteristics steVteasoR Veto 0 ma Output Characteristics Qutput Voltage Vin 12 V lout 25 A Maximum Switch Node Voltage Vin 12 V lout 20 A Var 5 VV amp 10 V Output Current Vin 8 V to 19 V ata System Characteristics a ee EE Z Full Load efficiency Vin 12 V Vout 1 2 V Varr 5 V lout 20 A o eo Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions2. 4 Schematic of the Test Setup Start Up and Shut Down Procedures Before starting the test the oscilloscope probes should be connected IR or k type thermo couples can be used to monitor the temperature of the parts to make sure that they are still within the limits IR monitoring requires the removal of the oscilloscope probes due to the IR beam interference Start Up Procedure 1 Initially set all the power supplies to 0 V 2 Set the output voltage by changing the VID settings The output voltage should not be changed with either the controller or driver active 3 Set the driver voltage and then set the input voltage 4 Set the load current to required value The load current must be incremented slowly to prevent the transient spikes at CS1 CS2 thereby shutting down the controller If the controller shuts down the input voltage must be set to zero then the input power supply has to be turned off then turned on and V re established 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 http onsemi com POWERPHASEGEVB Test Procedure 1 Before making any connections make sure to set 5 Set the load current slowly to the desired value the power supplies for input voltage and the driver For example Iout 2 5 A Refer to Start Up voltage at 0 V Also make sure that
3. unless otherwise noted Product performance may not be indicated by the Electrical Characteristics if operated under different conditions The output voltage can be adjusted by changing the VID settings See Appendix 1 The switching frequency is defined by the resistors R13 and R14 and can only be changed only by changing the 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 I jm 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 output voltage is set by the VID settings Refer to Monitoring the Input Voltage Appendix The input voltage can be monitored by using the test points at J9 and J10 on the POWERPHASEG evaluation Controller Biasing board This allows the user to find out the exact value of Connect the positive probe to Pin 2 at J5 and the neg
4. POWERPHASEGEVB POWERPHASEG Evaluation Board User s Manual Description The POWERPHASEG evaluation board is designed such that it can accommodate 2 PowerPhase parts Depending on the type of application and necessity any combination of the above packages can also be used The POWERPHASEG 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 25A The POWERPHASEG can be ordered with either 5 V or 12 V drivers but one can be installed at a time The POWERPHASEG evaluation board has a number of test points that can be used to evaluate its performance in any given application Features e 8 Vto 19 V Input Voltage e 25 A of Steady State Load Current e 330 kHz Switching Frequency ON Semiconductor http onsemi com EVAL BOARD USER S MANUAL e 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 Figure 1 POWERPHASEG Evaluation Board Semiconductor Components Industries
5. ative input voltage since there will be no losses from the cables or probe to the GND at Pin 1 at J5 Please keep this as a separate connectors supply to avoid damage to the controller especially when other drive voltages are used Controller VIN max Monitoring the Output Voltage specification is 7 V The POWERPHASEG evaluation board provides two test points for measuring the output voltage without any losses Driver Biasing from the cables or connectors The output voltage can be The driver positive voltage probe vec should be connected measured at the points J11 and J12 on the evaluation board to both pin 1 and 2 at J6 The driver voltage is defined depending on the type of driver installed i e a 12 V driver Monitoring the Switch Node Waveforms or a5 V driver The POWERPHASEG evaluation board is The POWERPHASEG evaluation board provides the set up to accept DFN8 footprints of ON Semiconductor 5 V opportunity to monitor the switch node waveforms and 12 V drivers The probe socket at test point JS8 provides the switch node waveforms http onsemi com 3 POWERPHASEGEVB Monitoring the High Side and Low Side Waveforms The high side waveforms can be obtained from the probe socket at test point JS6 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 so
6. ble pin of the controller controller reset EN must always be in the up position 1 unless a reset is performed To set the output voltage to 1 2 V for example VIDO 0 down VID1 VID2 VID3 1 up VID4 0 down and VIDS DAC EN 1 up Figure 7 Grayhill Switch Pin Labeling Table 2 VID CONTROL SETTINGS FOR OUTPUT VOLTAGE PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 VIDO VID1 VID2 VID3 VID4 VID5 DAC EN VouT V Tolerance 0 0 0 0 0 1 1 1 1 5625 0 5 a a EE a http onsemi com 8 POWERPHASEGEVB cu o o m Pin Diagram of NCP5386B Controller 29 28 26 25 27 1 vID1 24 2 viD2 23 3 vID3 22 4 vID4 21 5 NCP5386 A B 1 2 Phase Buck Controller 6 viD6 QFN32 19 7 VD7 AGND Down Bonded to 18 g DACMODE Exposed Flag 17 5 O 1 6 IE EJZFZI ZI ZIE Figure 8 Top View of the Pin Diagram of NCP5386B 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 NCP5386B ON Semiconductor and W are registered trademarks of Semiconductor Components Industries LLC SCILLC SCILLC owns the rights to a number of patents trademarks copyrights trade secrets and other intellectual property A listing of SCILLC s product patent coverage may be accessed at www onsemi com site pdf Patent Marking pdf SCILLC reserves the right to make changes without furth
7. cket 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 Connector Probe Signal Connector Figure 3 Tektronix Test Point amp Probe Socket Part 700503100 TEST EQUIPMENT REQUIRED Voltage Sources i 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 POWERPHASEG 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 i 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 POWERPHASEG evaluation board ranges from 0A 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 POWERPHASEG Evaluation Board the voltages that are to be measured are Vin Vout and Vary Similarly the currents that are to be measured are In Iout and lqry The set up for measuring these volta
8. er 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 claims costs damages and expenses and reasonable attorney fees arising out of directly or indirectly any claim of personal injury or death as
9. ges 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 measured as lout Vout Rsh Similarly the 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 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 20 ns 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 J12 http onsemi com 4 POWERPHASEGEVB TEST SET UP AND PROCEDURE Test Setup The test set up test points and components present on the POWERPHASEG Evaluation Board are shown in Figure 4 Controller VCC PWM Signal MOSFET Driver VID Control LS Driver Driver The POWERPHASE parts placed on the evaluation board are the Q43 and Q44 Refer to Figure 1 Driver Vcc Vout POWERPHASE Phase Node Figure
10. sociated 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 N American Technical Support 800 282 9855 Toll Free ON 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 f 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 EVBUM2233 D
11. the load Procedure 4 current is at 0 A 6 The frequency is already set to 330 kHz 2 Connect the Oscillator probes at the desired test If a different switching frequency is required points R13 and R14 have to be changed as per the data 3 Set the driver voltage to the required value sheet of NCP5386 Refer to Appendix For example Vqryr 5 V 7 Connect the voltmeters multi meters to monitor 4 After reaching the required driver voltage the required parameters Refer to Figure 4 set the input voltage as required 8 Obtain the required data and waveforms For example Vin 12 V http onsemi com 6 POWERPHASEGEVB TEST RESULTS Efficiency of NTMFD4C85N on POWERPHASEG Evaluation Board for Varvr 5 V 95 90 amp 85 gt O c 80 MT 75 70 Load A Figure 5 Efficiency for POWERPHASEG Board for Varvr 5 V Switch Node Voltage Waveforms of NTMFD4C85N on POWERPHASEG Evaluation Board for Vdrvr 5 V Top Gate Try 1235Y 546V 422 rrn 13 04 1823Y Chi OY Chiz 50y M GOL On 1 2565 IT 160ps pt Cha OY A Chi EEV Figure 6 Switch Node Waveforms for Vgry 5 V http onsemi com 7 POWERPHASEGEVB APPENDIX Table of AMD VID Settings for NCP5386B Controller The Grayhill 76PSBO8ST 8 position switch used for setting the output voltage of the synchronous buck converter Figure 7 below shows the pin assignment of the switch VIDO VIDS set the output voltage DAC and EN is the ena
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