2kW, 48V to 400V, >93% Efficiency, Isolated Bidirectional DC-DC Converter Reference Design for UPS

1 января 2018

The 2-kW isolated bidirectional DC-DC converter reference design (TIDA-00951) is capable of power transfer between a 400-V DC-BUS and a 12-14 cell lithium battery pack for use in UPS, battery backup and power storage applications. This reference design works as active clamped boost converter with ZVS in the backup mode, transferring power from the 48V battery to the 400V DC-BUS. Operating as a voltage fed full-bridge battery charger, this reference design enables you to achieve >93% efficiency when charging a 48V battery from the 400V DC BUS. This reference design also has built-in protection for DC BUS and battery overcurrent as well as overvoltage protection.

Особенности

Digitally controlled isolated bidirectional DC/DC converter Operates as active clamp full bridge boost converter with ZVS for the low-voltage switches at high loads Wide operating range from 36- to 60-V battery and 300- to 400-V DC bus Cost optimized design using 100-V FET on low-voltage side, eliminates need for paralleling multiple FETs up to 2kW Fast mode transfer from battery charging to back-up mode in less than 100uS