View U6433B05_1330336.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 can be Disabled Voltage Dependence of the Car Indicator Lamps Compensated for Lamp Failure Relay Output with High Current Carrying Capacity and Low Saturation Voltage Minimum Lamp Load for Flasher Operation 1W Load-dump Protection Very Low Susceptibility to EMI Protection According to ISO/TR 7637/1 Level 4
1. Description
The design of the U6433B is similar to that of U6043B, both devices have the same excellent EMC (Electro Magnetic Capability) and protection features. The U6433B includes an additional 8-mV comparator and a logical connection with the frequency doubling stage. This combination can be used for a hazard switch which bypasses the external shunt resistor to disable the frequency doubling. This feature is especially important with respect to the US automotive industry. During direction mode the U6433B works like other flashers, that is, frequency doubling in the case of lamp outage.
Flasher, 18-m Shunt, Frequency Doubling Disabling U6433B
Rev. 4810B-AUTO-10/05
Figure 1-1.
Block Diagram
6
G5
2 + K1 + K4 VS - 8 mV VS - 49 mV
VS
C1 4.7 F + K5 G4 5 G2
D1 23 V
R1 82 k
4
VS - 4 V K2
K3
49 a
VS - 6 V 3 7
VS - 8 V 8 1
Shunt VS R3
18 m R4 470
R2 PL >1 W 1.5 k
2
U6433B
4810B-AUTO-10/05
U6433B
2. Pin Configuration
Figure 2-1. Pinning SO8
GND
1
8
SI
VS
2
7
LD
U6433B
REL 3 6 VS
OSC
4
5
OSC
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 Relay driver Oscillator Oscillator Supply voltage Lamp failure detection Start input (49a)
3
4810B-AUTO-10/05
3. Functional Description
3.1 Pin 1, GND
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
Pin 2, Supply Voltage, VS - Power
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
Pin 3, Relay Control Output (Driver)
The relay control output is a high-side driver with a low saturation voltage and is capable of driving a typical automotive relay with a minimum coil resistance of 60.
3.4
Pins 4 and 5, Oscillator
The flashing frequency, f1, is determined by the R1C1 components as follows (see Figure 1-1 on page 2):
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: 50% Duty cycle in lamp outage mode: 40% (bright phase)
3.5
Pin 6, Supply Voltage, Sense
For accurate monitoring via the shunt resistor, a minimized layer resistance from point VS/shunt to pin 6 is recommended.
3.6
3.6.1
Pin 7, Lamp Outage Detection
Control Signal Threshold 1 (49-mV Comparator K1) The detection point for lamp failure can be calculated from the control signal threshold, typically 49 mV with VS = 12V. With a measuring resistance of R3 = 18 m, the frequency change-over is reached at a lamp load of 21W + 11.4W. The variation of the control signal threshold supply voltage takes into account the PTC characteristic of filament lamps.
4
U6433B
4810B-AUTO-10/05
U6433B
3.6.2 Control Signal Threshold 2 (8-mV Comparator K4) A voltage drop between 49 mV to 8 mV at R3 shunt resistor lets the flasher work in frequency doubling mode. If the voltage drop decreases to a value below VR3MAX = 8 mV, frequency doubling is disabled. This can be achieved either with a switch which bypasses the shunt resistor (for example, a special hazard warning switch) or with a small lamp load. The arrangement of the supply connections to pins 2 and 6 must ensure that, on the connection PCB, the layer resistance from VS to pin 6 is lower than the resistance to pin 2. Flasher operation starts with a lamp load of PL 1W.
3.7
Pin 8, Start Input
Start condition for flashing: the voltage at pin 8 has to be below the K3 threshold (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 between the thresholds of comparators K2 and K3. 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 1W is required.
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 6 Surge forward current tp = 0.1 ms, pins 2 and 6 tp = 300 ms, pins 2 and 6 tp = 300 ms, pin 8 Output current, pin 3 Power dissipation Tamb = 95C, SO8 Tamb = 60C, SO8 Junction temperature Ambient temperature range Storage temperature range Symbol VS IFSM IO Ptot Tj Tamb Tstg Value 18 1.5 1.0 30.0 0.3 340 560 150 -40 to +105 -55 to +150 Unit V A A mA A mW mW C C C
5. Thermal Resistance
Parameters Junction ambient SO8 Symbol RthJA Value 160 Unit K/W
5
4810B-AUTO-10/05
6. Electrical Characteristics
Typical values under normal operation of the application circuit shown in Figure 1-1 on page 2, VS = 12V (pins 2 and 6). Tamb = 25C, reference point ground (-31), unless otherwise specified. Parameters Supply voltage range Supply current, dark phase Supply current, bright phase Relay output, saturation voltage Relay output reverse current Relay coil resistance Start delay Frequency determining resistor Frequency determining capacitor Frequency tolerance Bright period Bright period Frequency increase Control signal threshold 1 Control signal threshold 2 Leakage resistance Lamp load 49a to GND Normal flashing, basic frequency f1 not including the tolerances of the external components R1 and C1 Basic frequency f1, VS = 9V to 15V Control frequency f2, VS = 9V to 15V Lamp failure, VS = 9V to 15V VS = 15V, pin 7 VS = 9V VS = 12V First bright phase Test Conditions Pins 2 and 6 Pins 2 and 6 Pins 2 and 6 IO = 150 mA, VS = 9V, pin 3 Pin 3 Symbol VS IS IS VO IO RL ton R1 C1 f1 f1 f2 f2 VR3 VR3 Rp PL 1 -5 47 37 2.15 x f1 50 43 47 2 53 45 49 6.8 60 10 510 47 +5 53 45 2.3 x f1 57 47 51 10 5 Min. 9 4.5 7.0 Typ. Max. 16.5 8 11 1.0 0.1 Unit V mA mA V mA ms k F % % % Hz mV mV k W
6
U6433B
4810B-AUTO-10/05
U6433B
7. Ordering Information
Extended Type Number U6433B-MFPY U6433B-MFPG3Y Package SO8 SO8 Remarks 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
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 Updated text to new style guide First page: Pb-free logo added Page 7: Ordering Information changed
4810B-AUTO-08/05
7
4810B-AUTO-10/05
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.
4810B-AUTO-10/05

▲Up To Search▲

Price & Availability of U6433B05

	To Download U6433B05 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .