U643B-MFPG3Y Atmel, U643B-MFPG3Y Datasheet

IC FLASHER 30M OHM SHUNT 8-SOIC

U643B-MFPG3Y

Manufacturer Part Number
U643B-MFPG3Y
Description
IC FLASHER 30M OHM SHUNT 8-SOIC
Manufacturer
Atmel
Type
Automotive, Flasherr
Datasheet

Specifications of U643B-MFPG3Y

Current - Supply
7mA
Current - Output
100µA
Voltage - Supply
9 V ~ 15 V
Operating Temperature
-40°C ~ 95°C
Package / Case
SO-8
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Frequency
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
U643B-MFPG3Y
Manufacturer:
华奥DHA
Quantity:
20 000
Features
1. Description
The bipolar integrated circuit U643B is used in relay-controlled automotive flashers
where a high-level EMC is required.
Lamp outage is indicated by frequency doubling during hazard warning as well as
direction mode.
Temperature and Supply Voltage Compensated Flashing Frequency
Frequency Doubling Indicates Lamp Outage
Relay Driver Output with High Current Carrying Capacity and Low Saturation Voltage
Minimum Lamp Load for Flasher Operation:
Very Low Susceptibility to EMI
Protection According to ISO/TR 7637/1 Level 4
1W
Flasher IC with
30-m Shunt
U643B
Rev. 4727B–AUTO–09/05

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U643B-MFPG3Y Summary of contents

Page 1

... Minimum Lamp Load for Flasher Operation: • Very Low Susceptibility to EMI • Protection According to ISO/TR 7637/1 Level 4 1. Description The bipolar integrated circuit U643B is used in relay-controlled automotive flashers where a high-level EMC is required. Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode. 1W Flasher IC with ...

Page 2

... Block Diagram Figure 2-1. Car Flasher Application Circuit, Resistor R Polarity: 0. Measuring comparator K 4 Pulse R 1 generator 49 a-Comparator K 49 a-Comparator K 5 U643B 2 and R : 0.25W - Ground 1 for Protection Against Continuous Reversed Shunt Relay 1.5...2 470 Indicator lamps GND - 4727B–AUTO–09/05 ...

Page 3

... Table 3-1. Pin Description Pin Symbol Function 1 GND IC ground 2 VS Supply voltage V 3 REL Relay driver 4 OSC C Oscillator 1 5 OSC R Oscillator Supply voltage Lamp failure detection 8 SI Start input (49a) 4727B–AUTO–09/05 GND U643B REL OSC 4 5 OSC S S U643B 3 ...

Page 4

... Functional Description 4.1 Pin 1, GND The U643B is protected against damage in case of battery reversal via resistor R (–31). An integrated protection circuit together with external resistances R rent pulses in the IC. 4.2 Pin 2, Supply Voltage, V The arrangement of the supply connections to pin 2 must ensure that on the connec- tion printed circuit board (PCB), the resistance ...

Page 5

... 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 required. 4727B–AUTO–09/05 = 12V 21W / (V 2.7A (K1 outage “Electrical Characteristics” on page and an internal comparator 12V). The outage of one lamp is detected S = 1.75A lamp = 12V 3.5A. S lamp 6). U643B 5 ...

Page 6

... Reference point ground (–31 25°C, unless otherwise specified. amb Parameters Supply voltage range Supply current Relay output: Saturation voltage Reverse current Start delay Frequency tolerance Bright period Frequency increase Control signal threshold Leakage resistance Lamp load U643B 6 Symbol FSM I FSM I FSM tot P ...

Page 7

... Ordering Information Extended Type Number U643B-MY U643B-MFPY U643B-MFPG3Y 9. Package Information 9.1 DIP8 4727B–AUTO–09/05 Package Remarks DIP8 Pb-free SO8 Tubed, Pb-free SO8 Taped and reeled, Pb-free U643B 7 ...

Page 8

... SO8 Package SO8 Dimensions in mm 10. 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. 4727B-AUTO-09/05 U643B 8 5.00 4.85 1.4 0.25 0.4 0.10 1.27 3. technical drawings according to DIN ...

Page 9

... 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 STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...

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