Part # LM1851 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM1851 Ground Fault Interrupter


Part Details:

LM1851 June 1992 Ground LM1851 Ground Fault Interrupter General Description Features The LM1851 is designed to provide ground fault protection Y Internal power supply shunt regulator Fault for AC power outlets in consumer and industrial environ- Y Externally programmable fault current threshold ments Ground fault currents greater than a presettable Y Externally programmable fault current integration time threshold value will trigger an external SCR-driven circuit Y Direct interface to SCR breaker to interrupt the AC line and remove the fault condi- Y Operates under line reversal both load vs line and hot Interrupter tion In addition to detection of conventional hot wire to vs neutral ground faults the neutral fault condition is also detected Y Detects neutral line faults Full advantage of the U S UL943 timing specification is tak-en to insure maximum immunity to false triggering due toline noise Special features include circuitry that rapidly re-sets the timing capacitor in the event that noise pulses intro-duce unwanted charging currents and a memory circuit thatallows firing of even a sluggish breaker on either half-cycleof the line voltage when external full-wave rectification isused Block and Connection Diagram TL H 5177 ­ 1 Order Number LM1851M or LM1851N See NS Package Number M08A or N08E C1995 National Semiconductor Corporation TL H 5177 RRD-B30M115 Printed in U S A Absolute Maximum RatingsIf Military Aerospace specified devices are required Soldering Information please contact the National Semiconductor Sales Dual-In-Line Package (10 sec ) 260 C Office Distributors for availability and specifications Small Outline Package Supply Current 19 mA Vapor Phase (60 sec ) 215 C Infrared (15 sec ) 220 C Power Dissipation (Note 1) 1250 mW See AN-450 ``Surface Mounting and Their Effects on Prod- Operating Temperature Range b40 C to a70 C


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LM1851.pdf Datasheet