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