Mosfet Crowbar Circuit. Once triggered they depend on the current limiting circuitry of the power supply or if that fails the blowing of the line fuse or tripping the circuit breaker. Crowbar protection is recommended for mosfet circuits.
The crowbar circuit mechanism contains crowbar device and sensing circuit monitoring circuit. Crowbar circuits are frequently implemented using a thyristor triac trisil or thyratron as the shorting device. An example crowbar circuit is shown to the right.
We compared the capability of both devices to protect a 1 0v output rail typical of modern digital logic cores using the ltm4641 a 38v in 10a step down regulator as our test platform figure 1.
The crowbar circuit mechanism contains crowbar device and sensing circuit monitoring circuit. A different approach is a crowbar circuit. Once triggered they depend on the current limiting circuitry of the power supply or if that fails the blowing of the line fuse or tripping the circuit breaker. Two of the most common circuit components utilized as a crowbar are the mosfet and silicon controlled rectifier scr also known as a thyristor.
