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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&...

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SeekIC No. : 004534919 Detail

U479B: Features: • 2-kV ESD Protection• Two Comparators with Common Reference• Tight Threshold Tolerance• Threshold Matched to PTC Characteristic of Incandescent Lamps• Temper...

U479B Data Sheet

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Part Number:
U479B
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: 2024/11/17

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Product Details

Description



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


Pinout

Connection Diagram


Specifications

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
VS
16.5
V
Current consumption
t = 2 ms, 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, U479B, is designed as a monitor for lamp failure in automobiles. The comparator threshold of U479B 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, the output is turned off, otherwise, the output of U479B 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.




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