400-V DC link capacitor pre-charger reference design for automotive HEV/EV applications
Description
This reference design is an automotive electric vehicle capacitor pre-charger power solution. The design is powered from the 12 V battery to charge a 4 mF capacitor bank to 400 V in 2 seconds. The design uses an isolated flyback controller operating at a switching frequency of 100 kHz. The initial output voltage is set for 60 V. A primary-side referenced control line is used to set the output to its final value of 400 V. Once the pre-charge sequence is complete: the UVLO function may be used to turn off the controller while the capacitor bank is connected to the rest of the system.
Features
- Isolated charging of large capacitor bankReplaces large relay and limiting resistorTested with up to 1 meter wiring to the load capacitorsPrimary side control for output voltage settingCompact power stage and controller layout for small solution size
Applications
- Auxiliary-power supplies
Product Categories
- Power management
| Application Area | End Equipment |
|---|---|
| Auxiliary-power supplies | https://www.ti.com/solution/auxiliary-power-supplies#referencedesigns |