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 greater than 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.
Features
- Digitally controlled isolated bidirectional DC/DC converter.
- Operates as active clamp full bridge boost converter with ZCS turn on along with ZVS at high load for the low-voltage FET and ZVS for high-voltage switches.
- Wide operating range from 36 to 60V battery and 300 to 400V DC bus.
- Cost optimised design using 100V FET on low-voltage side, eliminates need for parallelling multiple FETs up to 2kW.
- Fast mode transfer from battery charging to back-up mode in less than 100uS.
- Uses the TMS320F28033 digital controller present on the TIDA-01281 reference design for controlling the working.
- High side current sensing for monitoring the battery current based on the INA240 on-board the TIDA-01141 reference design.
- Uses the reinforced isolated gate-driver UCC21520 present in the TIDA-01159 design for driving the high voltage full-bridge.
To find out more, click here.