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GSWP100W-EVBPA

GaN E-HEMT Wireless Power Transfer Evaluation Board

User’s Guide

_____________________________________________________________________________________________________________________

GSWP100W-EVBPA Rev 180529

www.gansystems.com 1

Please refer to the Evaluation Board/Kit Important Notice on page 26

GSWP100W-EVBPA

100W GaN E-HEMT Wireless Power Transfer

Evaluation Board, Optimized for Class EF2

Amplifiers

User’s Guide

Visit

www.gansystems.com

for the latest version of this user’s guide.

Summary of Contents for GSWP100W-EVBPA

Page 1: ...___________________________________ GSWP100W EVBPA Rev 180529 2018 GaN Systems Inc www gansystems com 1 Please refer to the Evaluation Board Kit Important Notice on page 26 GSWP100W EVBPA 100W GaN E H...

Page 2: ...all locally approved safety procedures when working around high voltage Never leave the board operating unattended After it is de energized always wait until all capacitors are discharged before touc...

Page 3: ...o many charging ease of installation suitability for high power levels and fast charging Table 1 provides a comparison between inductive charging and magnetic resonant charging GaN E HEMTS are a key e...

Page 4: ...F2 power amplifier The GS61008Ps are used with the integrated high speed pSemi PE29102 gate driver in a push pull configuration The outputs of the PE29102 are capable of providing switching transition...

Page 5: ...TEK scope with current probe TCM0030A Fluke 87 multimeter for input current 50dB 500W attenuator as load Spectrum analyzer Power meter Thermal meter Evaluation Board Assembly Overview The evaluation...

Page 6: ..._____________________________________________________________ GSWP100W EVBPA Rev 180529 2018 GaN Systems Inc www gansystems com 6 Please refer to the Evaluation Board Kit Important Notice on page 26 F...

Page 7: ...2018 GaN Systems Inc www gansystems com 7 Please refer to the Evaluation Board Kit Important Notice on page 26 Block Diagram The block diagram of the evaluation board is provided in Figures 5 through...

Page 8: ..._______________________________________________________ GSWP100W EVBPA Rev 180529 2018 GaN Systems Inc www gansystems com 8 Please refer to the Evaluation Board Kit Important Notice on page 26 Figure...

Page 9: ...ation with an EMI filter Single ended mode Operation without an EMI filter Operation with an external oscillator signal input Users can run multiple PAs together at the same frequency for high power o...

Page 10: ...o protect against input DC overcurrent device over temperature output RF overvoltage and Voltage Standing Wave Ratio VSWR protection The protection signals are combined by U133 a 3 inputs OR gate logi...

Page 11: ...hese two voltage detection signals go to a two channel comparator U68 and are combined with OR gate U70 into one overvoltage trigger OVP_TRIG The OVP and OCP go into a hard combine circuit D45 which a...

Page 12: ...l performance For effective thermal management a hole is cut out of the PCB to permit access to the copper coins The two GS61008Ps bottom side thermal pads are soldered directly onto the copper coins...

Page 13: ...ion bench setup and test results Evaluation Board Overview Kit Contents The GSWP100W EVBPA evaluation kit contains Power Amplifier evaluation board assembly PA heatplate PA EMC shield 2 pins DC cord E...

Page 14: ...input voltage as shown in Figures 21 and 24 Configurations The PA can be configured into three different operating options voltage mode current mode and single ended Table 4 describes how to configur...

Page 15: ...oints locations are silkscreened on the PCB Table 5 Test point description Test point Description TP197 U90 input PE29102 driver TP76 U6 input PE29102 driver TP8 Q77 Gate voltage TP81 Q76 Gate voltage...

Page 16: ...on and configuration 1 First set the current limit to 0 3A for the 5VDC supply feeding JP35 2 Set the current limit to 1A for the HV DC supply feeding JP32 at a voltage of between 10VDC and 30VDC 3 Ve...

Page 17: ...llent thermal conduction apply thermal grease to the PA heatsink interface before screwing the units together Enough thermal grease should be applied so that a small amount extrudes on all four sides...

Page 18: ...chieved at a duty cycle of approximately 35 At that operating point the PA can work under very ZVS wide impedance range with high efficiency The PA duty cycle is controlled by gate driver PE29102A For...

Page 19: ...of harmonics at the output One significant advantage of the Class EF2 topology is that it has a lower 2nd harmonic when compared to other PA topologies This advantage results in a Class EF2 PA with mu...

Page 20: ...thout EMI filter at JP56 SMA Note With the EMI filter the maximum power level is limited to 80W due to the 50 test The PA s system reliability is optimized when the temperature rise of each device is...

Page 21: ...r a wide ambient temperature and with convection cooling eliminating the need for cooling fans These advantages support a PA design with excellent thermal performance up to 100W output power The tempe...

Page 22: ...C supply into JP35 Pin 1 positive Pin 2 negative Adjust the voltage to 5V Plug the HV supply into JP32 Pin 1 positive Pin 2 negative Turn the supply on and ramp the voltage from 0V to 10V Monitor the...

Page 23: ...d 31VDC input voltage This efficiency performance is lower than the one of without EMI filter due to the insertion and mismatch loss from the EMI filter The design of EMI filter is optimal at 30 but t...

Page 24: ..._____________________________________________________________________________________________ GSWP100W EVBPA Rev 180529 2018 GaN Systems Inc www gansystems com 24 Please refer to the Evaluation Board...

Page 25: ..._________________________________________ GSWP100W EVBPA Rev 180529 2018 GaN Systems Inc www gansystems com 25 Please refer to the Evaluation Board Kit Important Notice on page 26 Technical Resources...

Page 26: ...e board kit may be returned within 30 days from the date of delivery for a full refund THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTI...

Page 27: ...onents are not designed authorized or warranted for use in lifesaving life sustaining military aircraft or space applications nor in products or systems where failure or malfunction may result in pers...

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