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U4793BM, U4793BMFP, U479B

Table of contents:
Info of U4793BM
Info of U4793BMFP
Info of U479B

U4793BM, U4793BMFP, U479B Selling Leads, Datasheet

MFG:atmel Package Cooled:tfk D/C:dc0418

U4793BM, U4793BMFP, U479B Datasheet download

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Part Number: U4793BM

MFG: atmel

Package Cooled: tfk

D/C: dc0418

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U479B General 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 V_4,6 = V_S- V_T where V_T = 8 mV.

If the voltage drop across the shunt resistor, Rsh, exceeds 8 mV, the output is turned off, otherwise, the output is turned on. Without supply voltage or open input pin 8, the output is turned off. A comparator input, which is not used, must be connected to pin 7.

U479B Maximum Ratings

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Parameters	Symbol	Value	Unit
Supply voltage Pin2,7	V_S	16.5	V
Current consumption t = 2 ms, Pin1	I₁	1.5	A
Output current Pin 3, 5	I_3,5	20	mA
Input voltage Pin 4, 6 reference point Pin 7	-V_4,6	6	V
Power dissipation Tamb = 95 °C DIP8 SO8 Tamb=60 °C DIP8 SO8	P_tot	420 360	mW
Power dissipation Tamb = 95 °C DIP8 SO8 Tamb=60 °C DIP8 SO8	P_tot	690 560	mW
Ambient temperature range	T_amb	-40to+95
Storage temperature range	T_stg	-55to+125
Junction temperature	T_j	150

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 Damage-protection According to VDE 0839
• EMI Protection
• Reversal Polarity Protection
• Load-dump Protection

U479B Connection Diagram

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