Automotive 400-V battery to 12-V: 3.6-kW DC/DC converter reference design
Description
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.
Features
- Phase-shifted full-bridge converter over 200- to 450-V DC input: 10- to 15-V output and power up to 3.6 kWScalable to 800-V input systems with tight regulationSoft switching using phase-shifted full-bridge analog control loopSoft switching with zero voltage switching (ZVS) on the primary and dynamic on and off control on the secondary to enable higher efficiencySynchronization achievable for multiple phase operation
Applications
- Unidirectional 400 V & 800 V to LV
- Bidirectional 400-V & 800-V to LV
Product Categories
- Power management