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U4790BMFP, U4791B, U4791BA83

Table of contents:
Info of U4790BMFP
Info of U4791B
Info of U4791BA83

U4790BMFP, U4791B, U4791BA83 Selling Leads, Datasheet

MFG:tfk Package Cooled:tfk D/C:dc99

U4790BMFP, U4791B, U4791BA83 Datasheet download

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Part Number: U4790BMFP

MFG: tfk

Package Cooled: tfk

D/C: dc99

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U4791B General Description

The monolithic integrated bipolar circuit, U4791B, 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 a typical value of V_4,6 = V_S V_T whereas V_T= 53 mV.

The integrated circuit is recommended for the application of parallel connected lamps. If the voltage drop across shunt resistor, Rsh, exceeds 53 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 not used comparator must be connected to Pin 7.

U4791B Maximum Ratings

Parameters	Symbol	Value	Unit
Supply voltage Pin2,7	V_S	16.5	V
Current consumption t = 2 ms, measured at Pin 1 (GND)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 T_amb = 95 °C DIP8 SO8 T_amb=60 °C DIP8 SO8	P_tot	420 360	mW
	P_tot	690 560	mW
Ambient temperature range	T_amb	-40to+95
Storage temperature range	T_stg	-55to+125
Junction temperature	T_j	150

U4791B Features

` 10 kVESD protection
` Two comparators with common reference
` Tight threshold tolerance
` Threshold matched to PTC characteristic of incandescent lamps
` Temperature compensated
` NPN output
` Interference and damageprotection according to VDE 0839
` EMI protection
` Reversal polarity protection
` Load-dump protection

U4791B Connection Diagram

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