U643B
Description
The bipolar integrated circuit U643B is used in relay-controlled automotive flashers where a high-level EMC is required.
Key Features
- 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
