U4744B-AFPG3, U477B, U4790B Selling Leads, Datasheet
MFG:SOP-8 Package Cooled:96 D/C:SOP-8
U4744B-AFPG3, U477B, U4790B Datasheet download
Part Number: U4744B-AFPG3
MFG: SOP-8
Package Cooled: 96
D/C: SOP-8
U4744B-AFPG3, U477B, U4790B
- Table of contents:
Info of U4744B-AFPG3
Info of U477B
Info of U4790B
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About U4790B
PDF/DataSheet Download
Datasheet: U4790B
File Size: 57104 KB
Manufacturer: Atmel
Download : Click here to Download
About U4790B
PDF/DataSheet Download
Datasheet: U4790B
File Size: 57104 KB
Manufacturer: Atmel
Download : Click here to Download
About U4790B
PDF/DataSheet Download
Datasheet: U4790B
File Size: 57104 KB
Manufacturer: Atmel
Download : Click here to Download
U4790B General Description
The bipolar IC U4790B 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 V4,6 = VS VT where VT = 8 mV.
If the voltage drop across 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. An unused comparator input must be connected to Pin 7.
If the voltage drop across 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. An unused comparator input must be connected to Pin 7.
U4790B Maximum Ratings
| Parameters | Symbol | Value | Unit |
| Supply voltage Pin 2, 7 | VS | 16.5 | V |
| Current consumption t = 2 ms, measured at Pin 1 (GND) Pin 1 | 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 DIP 8 Tamb = 60 °C DIP 8 |
Ptot | 420 | mW |
| Ptot | 690 | mW | |
| Ambient temperature range | Tamb | 40 to +95 | °C |
| Storage temperature range | Tstg | 55 to +125 | °C |
| Junction temperature | Tj | 150 | °C |
U4790B 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
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
U4790B Connection Diagram
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