shut down circuit needed

[Emmanuel Akujobi]

please am designing an inverter using sg3524 and i really need a shut down circuit at a battery voltage 10.5V,i need help please.

 

[BradtheRad]

A transistor can be adjusted to operate a relay.

Screenshot:



You probably want a certain amount of hysteresis. This is provided by the relay itself.

A relay is a convenient way to do the switching, although it is not the only method.

 

[chuckey]

Please put a back EMF suppression diode across the relay coil.
Frank

 

[BradtheRad]

Yes, that was negligent on my part.

Corrected schematic:

 

[mtwieg]

You could just use an external UVLO detector to manipulate the shutdown pin of the controller.