U6433B_05 ATMEL [ATMEL Corporation], U6433B_05 Datasheet

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U6433B_05

Manufacturer Part Number
U6433B_05
Description
Flasher, 18-m Shunt, Frequency Doubling Disabling
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
Features
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.
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
Load-dump Protection
Very Low Susceptibility to EMI
Protection According to ISO/TR 7637/1 Level 4
1W
Flasher, 18-m
Shunt,
Frequency
Doubling
Disabling
U6433B
Rev. 4810B–AUTO–10/05

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U6433B_05 Summary of contents

Page 1

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 ...

Page 2

Figure 1-1. Block Diagram C 4.7 µ > U6433B Shunt R ...

Page 3

Pin Configuration Figure 2-1. Pinning SO8 Table 2-1. Pin Description Pin Symbol Function 1 GND IC ground 2 VS Supply voltage 3 REL Relay driver 4 OSC Oscillator 5 OSC Oscillator 6 VS Supply voltage 7 LD Lamp failure ...

Page 4

Functional Description 3.1 Pin 1, GND The integrated circuit is protected against damage via resistor R battery reversal. An integrated protection circuit together with external resistances R pulses in the IC. 3.2 Pin 2, Supply Voltage, V The arrangement ...

Page 5

Control Signal Threshold 2 (8-mV Comparator K4) A voltage drop between doubling mode. If the voltage drop decreases to a value below V This can be achieved either with a switch which ...

Page 6

Electrical Characteristics Typical values under normal operation of the application circuit shown 25°C, reference point ground (–31), unless otherwise specified. amb Parameters Supply voltage range Supply current, dark phase Supply current, bright phase Relay output, saturation ...

Page 7

Ordering Information Extended Type Number U6433B-MFPY U6433B-MFPG3Y 8. Package Information Package SO8 Dimensions Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this ...

Page 8

Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 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 Asia Room 1219 ...

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