U644B-FP - Flasher/ 18-m Shunt/ Extremly Low Current Consumption
The bipolar integrated circuit, U644B, is used in relaycontrolled automotive flashers where a high level EMC is required.
Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode.
If the flasher module provides an 4-pin connector the control pin of U644B (Pin 6)
U644B-FP Features
* D Frequency doubling indicates lamp outage D Frequency independent of temperature and voltage change D Minimum lamp load for flasher operation: D Very low susceptibility to EMI 1 W D Relay driver output with high current-carrying capacity and low saturation voltage D Protection according to ISO
