U2044B DUAL OUTPUT FLASHER synchronous rectifier tv circuit board components

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 the construction 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 A (@switches open)

►Reverse polarity protection

►Three control inputs: left, right and hazard warning

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