U644B-FP Datasheet - TEMIC Semiconductors

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

U644B-FP_TEMICSemiconductors.pdf