MC3425

Order this document by MC3425/D MC3425 Power Supply Supervisory/ Over and Undervoltage Protection Circuit The MC3425 is a power supply supervisory circuit containing all the necessary functions required to monitor over and undervoltage fault conditions. These integrated circuits contain dedicated over and undervoltage sensing channels with independently programmable time delays. The overvoltage channel has a high current Drive Output for use in conjunction with an external SCR Crowbar for shutdown. The undervoltage channel input comparator has hysteresis which is externally programmable, and an open–collector output for fault indication. Dedicated Over and Undervoltage Sensing POWER SUPPLY SUPERVISORY/ OVER AND UNDERVOLTAGE PROTECTION CIRCUIT SEMICONDUCTOR TECHNICAL DATA Programmable Hysteresis of Undervoltage Comparator Internal 2.5 V Reference 300 mA Overvoltage Drive Output 30 mA Undervoltage Indicator Output Programmable Time Delays 4.5 V to 40 V Operation 8 1 P1 SUFFIX PLASTIC PACKAGE CASE 626 Symbol VCC VIR IOS(DRV) VIND IIND PD RθJA TJ TA Tstg Value 40 –0.3 to +40 Internally Limited 0 to 40 30 1000 80 +150 0 to +70 –55 to +150 Unit Vdc Vdc mA Vdc mA mW °C/W °C °C °C O.V. DRV Output O.V. DLY O.V. Sense U.V. Sense 1 2 3 4 (Top View) Vout 8 7 6 5 VCC Gnd U.V. IND Output U.V. DLY MAXIMUM RATINGS Rating Power Supply Voltage Comparator Input Voltage Range (Note 1) Drive Output Short Circuit Current Indicator Output Voltage Indicator Output Sink Current Po...