Description
The integrated circuit U2044B is used in relay controlled automotive flashers. With two output stages each side of the vehicle is controlled separately. A left and a right direction indicator input with only a small control current makes switch contacts for small loads possible.
The separate hazard warning input simplifies theconstruction of the hazard switch. Lamp outage is indicated by frequency doubling during direction mode. Thanks to the extreme low current consumption U2044B can be connected to the battery directly.

FEATUREs
Temperature and supply voltage compensated flashing frequency
Frequency doubling indicates lamp outage
Two relay driver outputs with high current-carrying capacity and low saturation voltage
Minimum lamp load for flasher operation: ≥
1 W
Very low susceptibility to EMI
Protection according to ISO/TR7637/1 level 4
Extremly low current consumption < 10 ㎂(@switches open)
Reverse polarity protection
Three control inputs: left, right and hazard warning