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U479B
Automotive Lamp Outage Monitor, VT = 8 mV
Description
The monolithic integrated bipolar circuit, U479B, 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 V4,6 = VS - VT whereas 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. A not used comparator input must be connected to Pin 7.
Features
D D D D
2 kV-ESD protection Two comparators with common reference Tight threshold tolerance Threshold matched to PTC characteristic of incandescent lamps
D NPN output D Interference and damage-protection
according to VDE 0839
D Temperature compensated
D EMI protection D Reversal polarity protection D Load-dump protection
Ordering Information
Extended Type Number U479B U479B-FP Package DIP8 SO8 Remarks
Block Diagram
VS 2 Rsh Z2 - + 0.6 VS - + 8 - + 6 1 Lamps R1 150 W
95 10380
VBatt 7 5 &
OUT1
4 Rsh
3 &
OUT2
Figure 1. Schematic and application circuit
TELEFUNKEN Semiconductors Rev. A2, 04-Feb-97
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U479B
Pin Description
Input switch VRef IN2 OUT1 Pin 1 2 3 4 5 6 7 8 Symbol GND VS OUT2 IN1 OUT1 IN2 VRef Input Function Reference point, ground Supply voltage Output 2 Input 1 Output 1 Input 2 Reference voltage Input switch
GND VS OUT2 IN1
1 2 3 4
95 10634
8 7 6 5
Figure 2. Pinning
Absolute Maximum Ratings
Parameters Supply voltage Current consumption t = 2 ms, measured at Pin 1 (GND) Output current Input voltage reference point Pin 7 Power dissipation DIP 8 Tamb = 95 C SO 8 Tamb = 60 C DIP 8 SO 8 Ambient temperature range Storage temperature range Junction temperature Pin 2, 7 Pin 1 Pin 3, 5 Pin 4, 6 Symbol VS I1 I3,5 -V4,6 Ptot Ptot Tamb Tstg Tj Value 16.5 1.5 20 6 420 360 690 560 -40 to +95 -55 to +125 150 Unit V A mA V mW mW C C C
Thermal Resistance
Parameters Junction ambient DIP8 SO8 Symbol RthJA RthJA Value 110 160 Unit K/W K/W
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TELEFUNKEN Semiconductors Rev. A2, 04-Feb-97
U479B
Electrical Characteristics
VS = 9 to 15 V, Tamb = -40 to +95 C, figure 1, unless otherwise specified Parameters Supply voltage Internal Z-diode Z2 Current consumption Test Conditions / Pin Pin 2,7 Pin 2 VS = 12 V Pin 1 measured at Pin 1 (GND) Output saturation voltage VS = 9 V, I3,5 = 10 mA Pin 3,5 Tamb = 25 C Control signal threshold Reference point Pin 7 (V7) Pin 4,6 I3,5 = 3 mA VS = 12 V VS = 15 V V T(15V) V T(12V) Voltage drift Pin 4,6 Symbol VS VZ I1 Min 9 20 Typ Max 15 6 Unit V V mA
4.5
Vsat
0.5
V
-VT
DV +
15 V
* * 12V
DV
V8 II
6.5 7.8
8 9.3 0.45 0.6 VS 100 5
9.5 10.8
mV mV/V V nA
Threshold voltage Input currents Delay time
Switch identification Pin 8 Pin 4,6 Switch-on High to low Switch-off Low to high Pin 8 Pin 3,5
mA ms ms
td(on) td(off)
6 30
95 10624
V4,6 12.00 11.95 V
td(off) V0 12 6 V 0 10 20 30 40 50
td(on)
60 ms t
Figure 3. Delay times
TELEFUNKEN Semiconductors Rev. A2, 04-Feb-97
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U479B
Dimensions in mm
Package DIP8
Dimensions in mm
9.8 9.5 1.64 1.44 7.77 7.47
4.8 max 6.4 max 0.5 min 0.58 0.48 7.62 8 5 2.54 3.3 0.36 max 9.8 8.2
technical drawings according to DIN specifications 13021
1
4
Package SO8
Dimensions in mm
5.00 4.85 1.4 0.4 1.27 3.81 8 5 0.25 0.10 0.2 3.8 6.15 5.85 5.2 4.8 3.7
technical drawings according to DIN specifications 13034
8
5
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TELEFUNKEN Semiconductors Rev. A2, 04-Feb-97
U479B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
TELEFUNKEN Semiconductors Rev. A2, 04-Feb-97
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