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Nexperia NX-HB-GAN039-BSCUL User Manual

3.5 kw half-bridge evaluation board with bottom-side cooled gan fets
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Keywords
Abstract
UM90007
NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board
with bottom-side cooled GaN FETs
Rev. 1.2 — 4 December 2023
Content
GaN FET, half-bridge, converter, evaluation board
The NX-HB-GAN039-BSCUL evaluation board is a half-bridge converter circuit using Nexperia
bottom-side cooled power GaN FETs.
user manual

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Summary of Contents for Nexperia NX-HB-GAN039-BSCUL

  • Page 1 GaN FETs Rev. 1.2 — 4 December 2023 user manual Document information Information Content Keywords GaN FET, half-bridge, converter, evaluation board Abstract The NX-HB-GAN039-BSCUL evaluation board is a half-bridge converter circuit using Nexperia bottom-side cooled power GaN FETs.

  • Page 2: Fig. 1. Example Of A Safety Enclosure In The Nexperia Lab

    2. High Voltage Safety Precautions Read all safety precautions before use! Please note that this document covers only the NX-HB-GAN039-BSCUL and its functions. For additional information, please refer to the Product Specification To ensure safe operation, please carefully read all precautions before handling the evaluation board.

  • Page 3: Fig. 2. Example Of A Probe Positioner

    NEVER handle the evaluation board during operation under ANY circumstances After use the Nexperia Evaluation Board contains components which may store high voltage and will take time to discharge. Carefully probe the evaluation board once the power has been removed to check that all capacitors have been discharged.

  • Page 4: Fig. 3. Nx-Hb-Gan039-Bscul Bottom-Side Cooled Half-Bridge Evaluation Board

    This enables the basic study of the switching characteristics and efficiency achievable with Nexperia’s 650 V GaN FETs. The circuit can be configured for synchronous rectification, in either buck or boost mode. Selection jumpers allow the use of a single logic input or separate high / low level inputs.

  • Page 5: Quick Reference Information

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 3.1. Quick reference information Table 1. NX-HB-GAN039-BSCUL bottom-side cooled Input/Output Parameter Value High-voltage input/output 400 VDC max Auxiliary supply (J1) 10 V min, 18 V max Logic inputs nominal 0 V - 5 V <...

  • Page 6: Fig. 4. Functional Block Diagram

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 5. Circuit description The circuit comprises a simple half-bridge featuring two GAN039-650NBB GaN FETs, as indicated in the block diagram of Fig. 4. Two high-voltage ports are provided which can serve as either input or output, depending on the configuration: boost or buck.

  • Page 7: Fig. 5. Supply And Load Connections For Buck (A) And Boost (B) Configurations

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs +HVDC +HVDC high voltage input duty cycle = D HS GaN FET HI/LO GATE DRIVER LS GaN FET Vin\ Vout = D·HVDC load aaa-028881 (a) Buck Mode; see Fig.

  • Page 8: Fig. 6. Input Configurations. (A) Using A Single Source For Either Buck Or Boost Mode (B) Buck Mode Without Synchronous Rectification (C) Using Two Signal Sources

    For this evaluation board, the half-bridge converter circuit has been implemented on a 4-layer PCB and uses two Nexperia GAN039-650NBB GaN FETs. The circuit schematic, PCB layout and bill of materials for the NX-HB-GAN039-BSCUL bottom-side cooled evaluation board are shown in the next sections.

  • Page 9: Fig. 7. Schematic

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 7.1. NX-HB-GAN039-BSCUL bottom-side cooled schematic Buck In / Boost Out Buck Out / Boost In Tie power and analog ground planes at single point Fig. 7. Schematic UM90007 All information provided in this document is subject to legal disclaimers.

  • Page 10: Fig. 8. Pcb Top Layer, Hv

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 7.2. NX-HB-GAN039-BSCUL bottom-side cooled PCB layout Fig. 8. PCB top layer, HV UM90007 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2023. All rights reserved ©...

  • Page 11: Fig. 9. Pcb Bottom Layer, Power Ground

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs Fig. 9. PCB bottom layer, power ground UM90007 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2023. All rights reserved © user manual Rev.

  • Page 12: Fig. 10. Pcb Inner Layer 2, Power Ground

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs Fig. 10. PCB inner layer 2, power ground UM90007 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2023. All rights reserved ©...

  • Page 13: Fig. 11. Pcb Inner Layer 15, Hv

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs Fig. 11. PCB inner layer 15, HV UM90007 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2023. All rights reserved © user manual Rev.

  • Page 14: Fig. 12. Pcb Silkscreen

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs Fig. 12. PCB silkscreen UM90007 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2023. All rights reserved © user manual Rev. 1.2 — 4 December 2023...

  • Page 15: Nx-Hb-Gan039-Bscul Bottom-Side Cooled Bill Of Materials (Bom)

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 7.3. NX-HB-GAN039-BSCUL bottom-side cooled Bill of Materials (BOM) Table 2. NX-HB-GAN039-BSCUL Bill of Materials Part Value Package Description Supplier Supplier p/n Voltage C1206 Capacitor, ceramic Farnell 2525173...
  • Page 16 UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs Part Value Package Description Supplier Supplier p/n Voltage C0603 Capacitor, ceramic Farnell 2749806 100V C0603 Capacitor, ceramic Farnell 2749806 100V ES1J DO-214AC DIODE Farnell 2677373 600V BAT54...

  • Page 17: Using The Board

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs Part Value Package Description Supplier Supplier p/n Voltage TPSPAD1-13 P1-13 TEST PIN Farnell 1463077 TPSPAD1-13 P1-13 TEST PIN Farnell 1463077 TPSPAD1-13 P1-13 TEST PIN Farnell 1463077 LT3082...

  • Page 18: Fig. 13. Non-Overlapping Gate Pulses

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 9. Dead time control The required form of the gate-drive signals is shown in Fig. 13. The times marked A are the deadtimes when neither transistor is driven on. The deadtime must be greater than zero to avoid shoot-through currents.

  • Page 19: Fig. 15. Turn Off @ 20 Amps

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 11. Typical switching waveforms Channel 1 - Yellow = Switching node; Channel 2 - Blue = Inductor current; Channel 4 - Green = LS VGS Fig. 15. Turn off @ 20 Amps Channel 1 - Yellow = Switching node;...

  • Page 20: Fig. 17. Efficiency For A Buck Converter 400 V : 230 V

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 12. Efficiency sweep Efficiency has been measured for this circuit in buck mode with a 400 VDC input and 230 VDC output, switching at 100 kHz. aaa-032323...

  • Page 21: Legal Information

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs 14. Legal information Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions.
  • Page 22 UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs List of Tables Table 1. NX-HB-GAN039-BSCUL bottom-side cooled Input/Output................5 Table 2. NX-HB-GAN039-BSCUL Bill of Materials.....15 Table 3. Revision history............20 UM90007 All information provided in this document is subject to legal disclaimers.

  • Page 23: Table Of Contents

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs List of Figures Fig. 1. Example of a safety enclosure in the Nexperia lab... 2 Fig. 2. Example of a probe positioner........3 Fig. 3. NX-HB-GAN039-BSCUL bottom-side cooled half-bridge evaluation board..........

  • Page 24: Nexperia B.v. 2023. All Rights Reserved

    UM90007 Nexperia NX-HB-GAN039-BSCUL 3.5 kW half-bridge evaluation board with bottom-side cooled GaN FETs Contents 1. EVALUATION BOARD TERMS OF USE.......2 2. High Voltage Safety Precautions.........2 3. Introduction..............4 3.1. Quick reference information........5 4. Warnings................5 5. Circuit description............6 6. Configuration..............6 7.

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