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U643B - Flasher IC

U643B Product details

Description

The bipolar integrated circuit U643B is used in relay-controlled automotive flashers where a high-level EMC is required.. AUTO. 09/05 2. Block Diagram Figure 2-1. Car Flasher Application Circuit, Resistor R1 and R2: 0.25W; R4 for Protection Against Continuous Reversed Polarity: 0.5W C1 4 6 Measuring comparator K 1 V 6-81 mV 20 kΩ K1 2 5 kΩ 7 R3 Shunt 30 mΩ + V.

Features

  • 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: ≥ 1W.
  • Very Low Susceptibility to EMI.
  • Protection According to ISO/TR 7637/1 Level 4 Flasher IC with 30-mΩ Shunt 1.

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Datasheet Details

Part number
U643B
Manufacturer
ATMEL Corporation
File Size
214.64 KB
Datasheet
U643B_ATMELCorporation.pdf
Description
Flasher IC

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Flasher ATMEL Corporation
ATMEL Corporation U643B-like datasheet

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