Ac Crowbar Circuit. Typically a 5 volt rail may run with a 6 2 volt zener diode. These crowbarring components act as a near short circuit value path shunting the transient energy away from the protected equipment.
The zener diode voltage is chosen to be slightly above that of the output rail. A crowbar doesn t return to the normal operation when overvoltage condition is removed. A crowbar circuit is usually placed across the power supply s output terminals to protect the load against any overvoltage.
The zener diode voltage is chosen to be slightly above that of the output rail.
And this low on state voltage will further reduce any electrical over stress to the protected circuit. Typically a 5 volt rail may run with a 6 2 volt zener diode. The scr over voltage crowbar or protection circuit is connected between the output of the power supply and ground. These crowbarring components act as a near short circuit value path shunting the transient energy away from the protected equipment.
