MC3423

Order this document by MC3423/D MC3423 Overvoltage Crowbar Sensing Circuit This overvoltage protection circuit (OVP) protects sensitive electronic circuitry from overvoltage transients or regulator failures when used in conjunction with an external “crowbar” SCR. The device senses the overvoltage 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 overvoltage condition before tripping, thus supplying noise immunity. The MC3423 is essentially a “two terminal” system, therefore it can be used with either positive or negative supplies. OVERVOLTAGE SENSING CIRCUIT SEMICONDUCTOR TECHNICAL DATA P1 SUFFIX PLASTIC PACKAGE CASE 626 8 MAXIMUM RATINGS Rating Differential Power Supply Voltage Sense Voltage (1) Sense Voltage (2) Remote Activation Input Voltage Output Current Operating Ambient Temperature Range Operating Junction Temperature Storage Temperature Range Symbol VCC–VEE VSense1 VSense2 Vact IO TA TJ Tstg Value 40 6.5 6.5 7.0 300 0 to +70 125 –65 to +150 Unit Vdc Vdc Vdc 8 1 Vdc mA °C °C °C 1 D SUFFIX PLASTIC PACKAGE CASE 751 (SOP–8) PIN CONNECTIONS VCC 1 8 7 6 5 (Top View) Drive Output VEE Indicator Output Remote Activation Simplified Application Sense 1 2 Sense 2 3 Current 4 Source Vin Current Limited DC Power Supply + Cout Vout O. V. P. MC3423 ORDERING INFORMATION D...