U479B_07 ATMEL | Alldatasheet

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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 1. 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 V 4,6 = VS – VT where VT = 8 mV. If the voltage drop across the shunt resistor, R sh, 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. Figure 1-1. Schematic and Application Circuit 2 7 150 Ω VS Lamps 0.6 VS OUT1 OUT2 VBatt Rsh Rsh Automotive Lamp-outage Monitor IC U479B Rev. 4775B–AUTO–09/05

4775B–AUTO–09/05 U479B 2. Pin Configuration Figure 2-1. Pinning DIP8/SO8 4 5 8GND VS OUT2 1N1 OUT1 IN2 VREF INPUT Table 2-1. Pin Description Pin Symbol Function

1 GND Reference point, ground

2 VS Supply voltage

3 OUT2 Output 2

4 IN1 Input 1

5 OUT1 Output 1

6 IN2 Input 2

7 VREF Reference voltage

8 INPUT Input switch

4775B–AUTO–09/05 U479B 3. Absolute Maximum Ratings 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 Pin Symbol Value Unit Supply voltage 2, 7 V S 16.5 V Current consumption, t = 2 ms 1 I 1 1.5 A Output current 3, 5 I 3,5 20 mA Input voltage Reference point pin 7 4, 6 -V 4,6 6V Power dissipation Tamb = 95°C DIP8 SO8 Ptot Ptot 420 360 mW mW Tamb = 60°C DIP8 SO8 Ptot Ptot 690 560 mW mW Ambient temperature range T amb –40 to +95 °C Storage temperature range T stg –55 to +125 °C Junction temperature T j 150 °C 4. Thermal Resistance Parameters Symbol Value Unit Junction ambient DIP8 R thJA 110 K/W SO8 R thJA 160 K/W

4775B–AUTO–09/05 U479B Figure 5-1. Delay Times 5. Electrical Characteristics VS = 9V to 15V, Tamb = –40 to +95°C, Figure 1-1 on page 1, unless otherwise specified. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Supply voltage 2, 7 V S 91 5 V Internal Z-diode Z2 2V Z 20 V Current consumption V S = 12V 1 I 1 4.5 6 mA Output saturation voltage VS = 9V, I3,5 = 10 mA Tamb = 25°C 3, 5 V sat 0.5 V Control signal threshold Reference point VPin 7 I3,5 = 3 mA VS = 12V VS = 15V 4, 6 –VT –VT 6.5 7.8 9.3 9.5 10.8 mV mV Voltage drift ∆ V0 . 4 5 m V / V Threshold voltage Switch identification 8 V 8 0.6 VS V Input currents Input 1/input 2 4, 6 I I 100 nA Input switch 8 I I 5µ A Delay time Switch-on, high to low 3, 5 t d(on) 6µ s Switch-off, low to high t d(off) 30 µs ∆V VT(15 V) VT(12 V)– 12.00 11.95 td(on) 10 20 30 40 50 60 µs0 t V V td(off) V4,6

4775B–AUTO–09/05 U479B 7. Package Information 6. Ordering Information Extended Type Number Package Remarks U479B-MY DIP8 Pb-free U479B-MFPY SO8 Tubed, Pb-free U479B-MFPG3Y SO8 Taped and reeled, Pb-free 9.8 9.5 Di mensi ons i n mm 1.64 1.44 4.8 max 0.5 min 3.3 0.58 0.48 7.62 2.54 6.4 max 0.36 max 9.8 8.2 7.77 7.47 technical drawings according to DIN specifications

4775B–AUTO–09/05 U479B 8. Revision History technical drawings according to DIN specifications Dimensions in mm 5.00 4.85 0.4 1.27 3.81 1.4 0.25 0.10 5.2 4.8 3.7 3.8 6.15 5.85 0.2 Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. History 4775B-AUTO-09/05

  • Put datasheet in a new template
  • Pb-free logo on page 1 added
  • Ordering Information on page 5 changed

Printed on recycled paper. 4775B–AUTO–09/05 © Atmel Corporation 2005 . All rights reserved. Atmel ®, logo and combinations thereof, Everywhere Y ou Are ® and others, are registered trade- marks or trademarks of Atmel Corporation or its subsidiari es. Other terms and product names may be trademarks of others. Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL ’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL ’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTOR Y WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICU LAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR I NCIDEN- TAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF AT MEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the ri ght to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained her ein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not int ended, authorized, or warranted for use as components in applications intended to support or sustain life. Atmel Corporation Atmel Operations

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