OVERCURRENT PROTECTION CIRCUIT

摘要

An overcurrent protection circuit for use in a power supply system to control switching on of the circuit. The circuit is connected between a voltage source and a load. A current sensing resistor senses the current flowing to the load and a pair of thermally coupled transistor switches detect a predetermined voltage drop across the current sensing resistor when the current in the current sensing resistor exceeds a first threshold. A control switch limits the power delivered to the load from the voltage source when the pair of transistor switches detecting the predetermined voltage drop.