UCD3138 Hard Switching Full Bridge Converter Evaluation Module


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The Texas Instruments UCD3138HSFBEVM-029 evaluation module (EVM) is a digitally controlled hard switching full bridge converter based on the UCD3138RHA programmable digital power controller. The EVM is a standalone Symmetrical Hard Switching Full-Bridge (HSFB) DC-DC power converter designed for 48V-in systems. The UCD3138HSFBEVM-029 accepts a DC input from 36 to 72Vdc, and outputs a nominal 12Vdc with full output load power 360W, or full output current 30A. The protection features include over-voltage, under-voltage, over-current and over-temperature. Features include input voltage feedforward, pre-biased startup and PMBus communication. The UCD3138HSFBEVM-029 also comes with a USB-TO-GPIO Interface Adapter to download firmware and program the UCD3138 digital power controller in the EVM.

  • Digitally controlled and standalone hard switching full-bridge DC-DC power conversion
  • Voltage mode control
  • Secondary side control
  • DC input from 36 to 72Vdc
  • 12Vdc regulated output from no-load to full-load
  • Full-load power 360W, or full-load current 30A
  • High efficiency
  • Constant soft start time
  • Protection: over voltage, under voltage, over current, and over temperature
  • Constant current and constant power
  • Input voltage feed forward control
  • PMBus communications
  • Test points to facilitate device and topology evaluation

USB Cable

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Half-bridge drivers
UCC27211 4-A, 120-V half bridge gate driver with 8-V UVLO and TTL inputs


Isolated DC/DC converters & modules
UCC25230 12V to 105V Input, 0.2A Output Switching Converter


Low-side drivers
UCC27524 5-A/5-A dual-channel gate driver with 5-V UVLO, enable, and 1-ns delay Matching
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Evaluation board

UCD3138HSFBEVM-029 — UCD3138HSFBEVM-029 Evaluation Module

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UCD3138FW-HSFB — UCD3138 Hard Switch Full Bridge

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Technical documentation

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Type Title Date
EVM User's guide Using the UCD3138HSFBEVM-029 (Rev. A) 08 May 2019
Certificate UCD3138HSFBEVM-029 EU Declaration of Conformity (DoC) 02 Jan 2019
Analog Design Journal Fast input-voltage transient response with digitally-controlled isolated DC/DC 24 Jul 2015
Analog Design Journal Analog Applications Journal 3Q 2015 24 Jul 2015

Related design resources

Hardware development

UCD3138OL40EVM-032 UCD3138 Programmable Digital Power Controller Open Loop Evaluation Module (40-pin version)

Software development

UCD3138FW-HSFB UCD3138 Hard Switch Full Bridge Firmware

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