This overvoltage protection circuit uses a high-voltage comparator with a push-pull output stage to control a P-Channel MOSFET that connects the SUPPLY to the LOAD. When the SUPPLY voltage exceeds the overvoltage threshold (VOVER), the output of the comparator goes HIGH and disconnects the LOAD from the SUPPLY by opening the P-Channel MOSFET. Likewise, when the SUPPLY voltage is below VOVER, the output of the comparator is LOW and connects the LOAD to the SUPPLY.
Features
- Supply: operating voltage range = 12 V to 36 V
- Load: maximum operating voltage = 30 V
- Comparator output status (OUT)
- SUPPLY < V_over
- V_cl < 0.4 V
- SUPPLY ≥ V_over
- V_OH = SUPPLY