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U479B

Part Number	U479B
Manufacturer	ATMEL Corporation
Description	Automotive Lamp-outage Monitor IC
Published	Apr 16, 2005
Detailed Description	Features • • • • • • • • • • 2-kV ESD Protection Two Comparators with Common Reference Tight Threshold Tolerance Thresho...
Datasheet	U479B PDF File

Overview

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 Damage-protection According to VDE 0839 EMI Protection Reversal Polarity Protection Load-dump Protection Automotive Lamp-outage Monitor IC U479B Description 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, exceeds 8 mV...

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