400V – 12V/500W High Frequency Resonant Converter Reference Design Using High Voltage GaN Devices

(ACTIVE) PMP20289

Description & Features

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Key Document

Description

The PMP20289 was built and tested to verify the performance of a high frequency (>400kHz nominal switching frequency) LLC series resonant converter (LLC-SRC) implemented with Texas Instrument’s high voltage GaN FETs under nominal (390V to 12V) voltage conversion. The digital controller UCD3138A is used along with the UCD7138 SR controller to optimize LLC-SRC efficiency. TI’s high voltage direct drive GaNFET LMG3410 is used to enable fast switching and be able to minimize dead-time between half-bridge switches. The test results show that 96.8% peak efficiency is achieved at 24A load and 96.3% efficiency is achieved at 42A full load with a switching frequency over 350kHz in a 390V to 12V conversion.

Features
  • 400V – 12V/500W high frequency LLC series resonant converter
  • 350kHz resonant frequency and 500kHz switching frequency at 400V to 12V conversion
  • Utilize TI high voltage direct drive GaN FETs as input switches
  • Optimized LLC SR conduction with UCD7138/UCD3138A
  • Achieve peak 96.8% efficiency

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Design Guide

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Bill of Materials (BOM)

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Parametrics
 PMP20289.1
(Output Voltage 1)
PMP20289.2
(Output Voltage 2)
PMP20289.3
(Output Voltage 3)
Vin (Min) (V)3702005.5
Vin (Max) (V)4004009
Vout (Nom) (V)1275
Iout (Max) (A)4211
Output Power (W)50475
Isolated/Non-IsolatedIsolatedIsolatedIsolated
Input TypeDCDCDC
TopologyHalf Bridge- LLCFlyback- DCMBuck- Synchronous

TI Devices (9)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DCP021212  Miniature, 2W Isolated Unregulated DC/DC Converters  Offline & isolated DC/DC controllers & converters  Sample & Buy Not Available
ISO7821  High-Immunity, 5.7kVRMS Reinforced Dual-Channel 1/1 Digital Isolator, 100Mbps  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LMG3410R070  600-V 70mΩ GaN With Integrated Driver and Protection  Gallium nitride (GaN)  Sample & Buy View Design Kits & Evaluation Modules
LP3985  Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
OPA376  Precision, Low Noise, Low Iq Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS62163  3V-17V 1A Step-Down Converters with DCS-Control™  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
UCC3813-4  Low Power Economy BiCMOS Current Mode PWM  Offline & isolated DC/DC controllers & converters  Sample & Buy Not Available
UCD3138A  UCD3138A Highly Integrated Digital Controller for Isolated Power  Digital power  Sample & Buy View Design Kits & Evaluation Modules
UCD7138  Low-Side Power MOSFET Driver With Body Diode Conduction Sensing  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DCP021212 Download -
Download Download
ISO7821 Download Download
SOIC (DWW)| 16 Download
LMG3410R070 Download Download
LP3985 Download Download
Download -
OPA376 Download Download
Download Download
Download Download
TPS62163 Download Download
UCC3813-4 Download Download
Download Download
Download Download
UCD3138A Download
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Technical Documents

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User guides (2)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 213 17 Aug 2016 0
PDF 4046 16 Aug 2016 0
Design files (30)
Title Abstract Type Size (KB) Date Views
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