U479B Datasheet (ATMEL Corporation) - Automotive Lamp-outage Monitor IC

U479B, Automotive Lamp-outage Monitor IC

The monolithic integrated bipolar circuit, U479B, is designed as a monitor for lamp failure in automobiles.

The comparator threshold is matched to the PTC characteristic of incandescent lamps.

The threshold is tied to V4,6 = VS - VT where VT = 8 mV.

If the voltage drop across the shunt resistor, Rsh

U479B Features

* 2-kV ESD Protection Two Comparators with Common Reference Tight Threshold Tolerance Threshold Matched to PTC Characteristic of Incandescent Lamps Temperature Compensated NPN Output Interference and Da