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零件编号 | U479B | ||
描述 | Automotive Lamp-outage Monitor IC | ||
制造商 | ATMEL Corporation | ||
LOGO | |||
1 Page
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
Description
The monolithic integrated bipolar circuit, U479B, is designed as a monitor for lamp fail-
ure in automobiles. The comparator threshold 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 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.
Automotive
Lamp-outage
Monitor IC
U479B
Figure 1. Schematic and Application Circuit
VS
2
7
Rsh
Z2
4
-
+
Rsh
8
0.6 VS
-
+
&
-
+&
6
Lamps
1
R1 150 Ω
VBatt
5 OUT1
3
OUT2
Rev. 4775A–AUTO–11/03
This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.
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页数 | 8 页 | ||
下载 | [ U479B.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
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