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Bidirectional 400V-12V DC/DC converter reference design

TIDM-BIDIR-400-12

Overview

The Bidirectional 400V-12V DC/DC Converter Reference Design implements an isolated bidirectional DC/DC converter based on a microcontroller. The phase-shifted full bridge (PSFB) with synchronous rectification controls the power flow from the 400V bus/battery to the 12V battery in buck mode, while the push-pull stage controls the reverse power flow from the low-voltage battery to the high-voltage bus/battery in boost mode. . This implementation uses a Texas Instruments (TI) 32-bit microcontroller TMS320F28035 on the low-voltage side to achieve closed-loop control of bidirectional power flow. This digital controller system implements advanced control strategies to optimally control power stages under varying conditions and provides system-level intelligence for safe and seamless transitions between operating and PWM switching modes.

characteristic

● Digitally controlled isolated bidirectional DC/DC converter based on TMS320F28035 microcontroller
● Provides 300W rated output in both directions
● High voltage DC input: 200-400V
● Low voltage DC output: 9-13.5.V (rated voltage 12V)
● Seamless and instant transition between buck and boost modes
● Complete software package (see link below for software download instructions)

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Blockdiagram

Design Files

Documentation

Bi-Directional DC-DC Converter

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Update:2025-06-20 20:36:38

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