U644B
Overview
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.
- Frequency doubling indicates lamp outage
- Frequency independent of temperature and voltage change
- Minimum lamp load for flasher operation:
- Very low susceptibility to EMI 1 W
- Relay driver output with high current-carrying capacity and low saturation voltage
- Protection according to ISO TR7637/1 level 4
- Control input (Kl 15)
