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TIDM-02021
11kW three-phase bidirectional onboard charger and low-voltage DC-DC reference design with F29x MCU
TIDM-02021
Overview
This reference design integrates an 11kW onboard charger (OBC) and a 2.5kW low-voltage (LV) DC- DC converter (LDC). The design uses a three-phase single-stage series resonant dual-active-bridge AC- DC converter topology. TI F29x MCUs and Type-5 enhanced pulse-width-modulator (ePWM) support the complex modulation of the three-phase AC-DC converter.
Features
- 11kW maximum power and 97.5% peak efficiency for OBC
- VAC(ph): 175–264V; Nominal 220V
- VHVDC: 450–850V (high-voltage (HV) battery voltage range)
- Three-phase single-stage series resonant dual active bridge (SS-SRDAB) enables ZVS and ZCS soft-switching operation
- 150kHz resonant frequency (80kHz–250kHz operating range) enables high power density
- Supports bidirectional power flow for G2V and V2L and V2G modes
- 2.5kW maximum power for LDC
- VLVDC: Nominal 14V
- Single MCU for OBC and LDC closed-loop control
- Type-5 ePWM simplifies the complex PWM modulation for three-phase single-stage converter
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUFF5.PDF (374 KB)
Reference design overview and verified performance test data
Products
Includes TI products in the design and potential alternatives.
Automotive powertrain, zonal & chassis control MCUs
F29H859TU-Q1 — Automotive C2000™ 64-bit MCU with C29x 200MHz tri-core, lockstep, functional safety compliance, 4MB
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Evaluation board
F29H85X-SOM-EVM — F29H85x controlSOM evaluation module
This reference design integrates an 11kW onboard charger (OBC) and a 2.5kW low-voltage (LV) DC- DC converter (LDC). The design uses a three-phase single-stage series resonant dual-active-bridge AC- DC converter topology. TI F29x MCUs and Type-5 enhanced pulse-width-modulator (ePWM) support the (...)
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F29H85X-SOM-EVM — F29H85x controlSOM evaluation module
Hardware development
Reference design
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| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Design guide | 11kW Three-Phase Bidirectional Onboard Charger and Low-Voltage DC-DC Reference Design With F29x MCU | PDF | HTML | Mar 20, 2026 |
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