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U479B PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 U479B
기능 Automotive Lamp-outage Monitor IC
제조업체 ATMEL Corporation
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U479B 데이터시트, 핀배열, 회로
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
VBatt
5 OUT1
3
OUT2
Rev. 4775A–AUTO–11/03




U479B pdf, 반도체, 판매, 대치품
Electrical Characteristics
VS = 9 to 15 V, Tamb = -40 to +95°C, Figure 1 on page 1, unless otherwise specified.
Parameters
Test Conditions
Pin Symbol
Supply voltage
Internal Z-diode Z2
Current consumption
Output saturation voltage
Control signal threshold
VS = 12 V
VS = 9 V, I3,5 = 10 mA
Tamb = 25 °C
Reference point VPin 7
I3,5 = 3 mA
VS = 12 V
VS = 15 V
2, 7 VS
2 VZ
1 I1
3, 5 Vsat
4, 6 -VT
-VT
Voltage drift
DV = V-----T---(-1---5----V---)---–----V-----T--(--1---2---V----)
15 V 12 V
DV
Min.
9
20
6.5
7.8
Threshold voltage
Input currents
Delay time
Switch identification
Input 1/input 2
Input switch
Switch-on, high to low
Switch-off, low to high
8
4, 6
8
3, 5
V8
II
II
td(on)
td(off)
Figure 3. Delay Times
Typ.
4.5
8
9.3
0.45
0.6 VS
100
5
6
30
Max.
15
6
0.5
9.5
10.8
Unit
V
V
mA
V
mV
mV
mV/V
V
nA
µA
µs
µs
V4,6
12.00
11.95
V
V0
12
6
V
0
td(off)
td(on)
10 20
30 40
50 60 µs
t
4 U479B
4775A–AUTO–11/03

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U479B 전자부품, 판매, 대치품
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 487-2600
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Hong Kong
Tel: (852) 2721-9778
Fax: (852) 2722-1369
Japan
9F, Tonetsu Shinkawa Bldg.
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Chuo-ku, Tokyo 104-0033
Japan
Tel: (81) 3-3523-3551
Fax: (81) 3-3523-7581
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Tel: 1(408) 441-0311
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Tel: (49) 71-31-67-0
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Colorado Springs, CO 80906, USA
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Literature Requests
www.atmel.com/literature
Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard
warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any
errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and
does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are
granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use
as critical components in life support devices or systems.
© Atmel Corporation 2003. All rights reserved.
Atmel® and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries.
Other terms and product names may be the trademarks of others.
Printed on recycled paper.
4775A–AUTO–11/03

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