View U2043B-MFPG3Y_755440.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Features
Temperature and Voltage Compensated Frequency Warning Indication of Lamp Failure by Means of Frequency Doubling Minimum Lamp Load for Flasher Operation 10W Relay Output with High Current Carrying Capacity and Low Saturation Voltage * Low Susceptibility to EMI
* * * *
1. Description
The integrated circuit U2043B is used in relay-controlled automotive flashers where a high EMC level is required. A lamp outage is indicated by frequency doubling during hazard mode as well as direction mode. The pilot lamp can be connected either to VBatt or GND. Figure 1-1. Block Diagram
+VS + 49 6 C1 Measuring comparator 4 K 1 V 6-81 mV 7 Pilot lamp Pulse generator 3.8 k 8 K 3 V 6-5 V 49 a-Comparator 23 V 1 IC Ground R1 100 GND - 31 5 W 21 W 21 W 21 W Indicator lamps Pilot lamps 21 W 5 W 3 Relay R2 3.3 k 49 a 5W 2 R3 Shunt 30 m
Flasher, 30 m Shunt, Pilot Lamp to GND or VBatt U2043B
R1
5
Rev. 4720B-AUTO-09/05
2. Pin Configuration
Figure 2-1. Pinning DIP8/SO8
GND
1 2
8 7
SI
VS REL OSC
LD VS OSC
U2043B
3 4 6 5
Table 2-1.
Pin 1 2 3 4 5 6 7 8
Pin Description
Symbol GND VS REL OSC OSC VS LD SI Function IC ground Supply voltage VS Relay driver C1 Oscillator R1 Oscillator Supply voltage VS Lamp failure detection Start input (49a)
2
U2043B
4720B-AUTO-09/05
U2043B
3. Functional Description
3.1 GND (Pin 1)
The integrated circuit is protected against damage via resistor R4 to ground (-31) in the case of battery reversal. An integrated protection circuit together with external resistances R2 and R4 limits the current pulses in the IC.
3.2
Supply Voltage, VS Power (Pin 2)
The arrangement of the supply connections to pin 2 must be so as to ensure that, on the connection printed circuit board (PCB), the resistance of VS to pin 6 is lower than that to pin 2.
3.3
Relay Control Output (Driver, Pin 3)
The relay control output is a high-side driver with a low saturation voltage and capable of driving a typical automotive relay with a minimum coil resistance of 60.
3.4
Oscillator (Pin 4 and 5)
Flashing frequency, f1, is determined by the R1C1 components as follows (see Figure 1-1 on page 1): 1 f 1 = ------------------------------------ Hz R 1 x C 1 x 1.5 where C1 47 F R1 = 6.8 k to 510 k
In the case of a lamp outage (see pin 7) the oscillator frequency is switched to the lamp outage frequency f2 with f2 2.2 x f1. Duty cycle in normal flashing mode: Duty cycle in lamp outage mode: 50% 40% (bright phase)
3.5
Supply Voltage, Sense (Pin 6)
For accurate monitoring via the shunt resistor, a minimized layer resistance from point VS/shunt to pin 6 is recommended.
3
4720B-AUTO-09/05
3.6
Lamp Outage Detection (Pin 7)
The lamp current is monitored via an external shunt resistor R3 and an internal comparator K1 with its reference voltage of typically 81 mV (VS = 12V). The outage of one lamp out of two lamps is detected according to the following calculation: Nominal current of 1 lamp: Nominal current of 2 lamps: 21W/(VS = 12V): 2 x 21W/(VS = 12V): Ilamp = 1.75A Ilamp = 3.5A
We recommend setting the detection threshold in the middle of the current range: Ioutage 2.7A Thus, the shunt resistor is calculated as: R3 = VT (K1)/Ioutage R3 = 81 mV/2.7 A = 30 m Comparator K1's reference voltage is matched to the characteristics of filament lamps (see section "Control Signal Threshold"). The combination of the shunt resistor and the resistance of the wire harness prevents pin 7 from a too high voltage in the case of shorted lamps.
3.7
Start Input (Pin 8)
Start condition for flashing: The voltage at pin 8 has to be less than VS - 5V (flasher switch closed). Humidity and dirt may decrease the resistance between 49a and GND. If this leakage resistance is > 5 k the IC is still kept in its off-condition. In this case the voltage at pin 8 is greater than VS - 5V. During the bright phase the voltage at pin 8 is above the K2 threshold, during the dark phase it is below the K3 threshold. For proper start conditions a minimum lamp wattage of 10W is required.
4
U2043B
4720B-AUTO-09/05
U2043B
4. 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. Reference point: pin 1 Parameters Supply voltage, pins 2 and pin 6 Surge forward current tp = 0.1 ms tp = 2 ms tp = 2 ms Output current, pin 3 Power Dissipation Tamb = 95C, DIP8 SO8 Tamb = 60C, DIP8 SO8 Junction temperature Ambient temperature range Storage temperature range Ptot Ptot Ptot Ptot Tj Tamb Tstg 420 340 690 560 150 -40 to +95 -55 to +150 mW mW mW mW C C C Symbol VS IFSM IFSM IFSM IO Value 16.5 1.5 1.0 50 0.3 Unit V A A mA A
5. Thermal Resistance
Parameters Junction ambient, DIP8 Junction ambient, SO8 Symbol RthJA RthJA Value 110 160 Unit K/W K/W
5
4720B-AUTO-09/05
6. Electrical Characteristics
Typical values under normal operation in application circuit Figure 1-1 on page 1, VS (+49, pin 2 and pin 6) = 12V. Reference point ground (-31), Tamb = 25C, unless otherwise specified Parameters Supply voltage range Supply current Supply current Relay output Relay output reverse current Relay coil resistance Start delay Frequency determining resistor Frequency determining capacitor Frequency tolerance Normal flashing, basic frequency f1 not including the tolerance of the external components R1 and C1 Basic frequency f1 Control frequency f2 Lamp outage VS = 15V (pin 7) VS = 9V VS = 12V 49a to GND First bright phase Test Conditions Pins 2, 6 Dark phase or stand-by, pins 2, 6 Bright phase, pins 2, 6 Saturation voltage IO = 150 mA, VS = 9V (pin 3) Pin 3 Symbol VS(+49) IS IS VO IO RL ton R1 C1 f1 f1 f2 f2 VR3 VR3 VR3 Rp PL 10 -5 47 37 2.15 x f1 85 66 76 91 71 81 2 6.8 60 10 510 47 +5 53 45 2.3 x f1 97 76 87 5 Min. Typ. 9 to 15 4.5 7.0 8 11 1.0 0.1 Max. Unit V mA mA V mA ms k F % % % Hz mV mV mV k W
Bright period Frequency increase Control signal threshold Leakage resistance Lamp load
6
U2043B
4720B-AUTO-09/05
U2043B
7. Ordering Information
Extended Type Number U2043B-MY U2043B-MFPY U2043B-MFPG3Y Package DIP8 SO8 SO8 Remarks Tubed, Pb-free Tubed, Pb-free Taped and reeled, Pb-free
8. Package Information
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
1
4
7
4720B-AUTO-09/05
Package: DIP8 Dimensions in mm
9.8 max. 9.60.1 1.20.3 4.20.3 3.60.1 1.8 7.620.15 0.3 B A
6.7 2.5
0.530.05
0.4 A
6.30.1
0.36 max.
2.54 nom.
B 1.54
3 x 2.54 = 7.62 nom.
8.750.8
0.65 8 5
technical drawings according to DIN specifications
1 Drawing-No.: 6.543-5040.01-4 Issue: 1; 16.01.02
4
8
U2043B
4720B-AUTO-09/05
U2043B
9. Revision History
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 * * * * Put datasheet in a new template Pb-free logo on page 1 added New heading rows in Table "Absolute Maximum Rating" on page 5 added Ordering Information on page 7 changed
4720B-AUTO-09/05
9
4720B-AUTO-09/05
Atmel Corporation
2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600
Atmel Operations
Memory
2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314
RF/Automotive
Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759
Regional Headquarters
Europe
Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500
Microcontrollers
2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel: (33) 2-40-18-18-18 Fax: (33) 2-40-18-19-60
Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom
Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel: (33) 4-76-58-30-00 Fax: (33) 4-76-58-34-80
Asia
Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369
ASIC/ASSP/Smart Cards
Zone Industrielle 13106 Rousset Cedex, France Tel: (33) 4-42-53-60-00 Fax: (33) 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel: (44) 1355-803-000 Fax: (44) 1355-242-743
Japan
9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581
Literature Requests
www.atmel.com/literature
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 CONDITIONS OF SALE LOCATED ON ATMEL'S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL 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 ATMEL 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 right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.
(c) Atmel Corporation 2005. All rights reserved. Atmel (R), logo and combinations thereof, Everywhere You Are (R) and others, are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others.
Printed on recycled paper.
4720B-AUTO-09/05

▲Up To Search▲

Price & Availability of U2043B-MFPG3Y

	To Download U2043B-MFPG3Y Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .