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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 protecti...

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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`...

U4791B Data Sheet

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Part Number:
U4791B
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/4/28

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Product Details

Description



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




Pinout

Connection Diagram


Specifications

Parameters
Symbol
Value
Unit
Supply voltage Pin2,7
VS
16.5
V
Current consumption
t = 2 ms, measured at Pin 1 (GND)Pin1
I1
1.5
A
Output current Pin 3, 5
I3,5
20
mA
Input voltage Pin 4, 6
reference point Pin 7
-V4,6
6
V

Power dissipation
Tamb = 95 °C DIP8
SO8
Tamb=60 °C DIP8
SO8
Ptot
420
360
mW
Ptot
690
560
mW
Ambient temperature range
Tamb
-40to+95
Storage temperature range
Tstg
-55to+125
Junction temperature
Tj
150



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 of U4791B is tied to a typical value of V4,6 = VS VT whereas VT = 53 mV.

The U4791B 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.




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