This reference design demonstrates how to design a high-voltage interlock loop (HVIL), which operates as the safety circuitry regarding battery connections to high voltages cables in electric vehicles. This design uses a combinations of ampliifers, comparators, LDO, and logic gates to offer both analog and digital readings of the state of the HVIL connector.
Features
- Wide coverage of interlock loop fault diagnosis with LED indication
- Configurable constant current generation
- Analog and digital output signal options
- Adjustable thresholds for fault state monitoring
- Unidirectional interlock system