Order this document by MC3423/D
MC3423 Over
voltage Crowbar Sensing Circuit
This over
voltage protection circuit (OVP) protects sensitive electronic circuitry from over
voltage transients or regulator failures when used in conjunction with an external “crowbar” SCR.
The device senses the over
voltage condition and quickly “crowbars” or short circuits the supply, forcing the supply into current limiting or opening the fuse or circuit breaker.
The protection
voltage threshold is adjustable and the MC3423 can be programmed for minimum duration of over
voltage condition before tripping, thus supplying noise immunity.
The MC3423 is essentially a “two terminal” system, therefore it can be used with ei...