Automotive 400-V battery to 12-V, 3.6-kW DC/DC converter reference design


Design files


This reference design is a 3.6-kW, automotive 400-V to 12-V unidirectional converter which converts the 200-V to 450-V DC input to 12-V, 300-A maximum output. Circuit breaker is applied for overcurrent and overvoltage protection. The converter is designed with SiC MOSFETs on the high voltage side and driven by 5.7-kVRMS, reinforced isolated dual-channel gate drivers. The enhanced phase-shifted full-bridge controller implements programmable delays which ensure zero voltage switching (ZVS) over a wide range of operating conditions. It offers multiple lightload management features including burst mode and dynamic SR on and off control when transitioning in and out of discontinuous current mode (DCM) operation. The output implements synchronous rectification, which enables fast transient response and a high-loop bandwidth.

  • Phase-shifted full-bridge converter over 200- to 450-V DC input, 10- to 15-V output and power up to 3.6 kW
  • Scalable to 800-V input systems with tight regulation
  • Soft switching using phase-shifted full-bridge analog control loop
  • Soft switching with zero voltage switching (ZVS) on the primary and dynamic on and off control on the secondary to enable higher efficiency
  • Synchronization achievable for multiple phase operation
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUEY2.PDF (1963 K)

Reference design overview and verified performance test data

TIDM916.ZIP (674 K)

Detailed schematic diagram for design layout and components

TIDM917.ZIP (184 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDM918.ZIP (622 K)

Detailed overview of design layout for component placement

TIDM920.ZIP (6284 K)

Files used for 3D models or 2D drawings of IC components

TIDCG20.ZIP (2478 K)

Design file that contains information on physical board layer of design PCB

TIDM919.ZIP (3349 K)

PCB layer plot file used for generating PCB design layout


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Technical documentation

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Type Title Date
* Design guide Automotive 400-V Battery to 12 V, 3.6-kW DC/DC Converter Reference Design PDF | HTML Sep. 02, 2020
Application note UCC28950 600W Phase Shifted Full Bridge Design Review/Application Report (Rev. D) PDF | HTML Mar. 04, 2022
User guide A Design Review of a Full-Featured 350-W Offline Power Converter Dec. 18, 2013

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