BD81A44MUV Power Management IC – 4-Channel Automotive LED Driver, Boost Controller, PWM Dimming

The BD81A44MUV is a highly integrated power management IC designed for automotive LED lighting applications.

It features a built-in boost controller and four constant-current channels for driving LED strings.
Each channel supports up to 160mA with independent PWM dimming control.
The device operates over a wide input voltage range of 4.5V to 35V, making it suitable for 12V and 24V vehicle systems.
Integrated protection features include LED open/short detection, overcurrent protection, and overtemperature shutdown.
The boost converter output voltage can be adjusted up to 45V to accommodate multiple LEDs in series.
A dedicated diagnostic output provides fault status feedback to the system microcontroller.
Typical applications include automotive headlights, daytime running lights (DRL), tail lights, and interior ambient lighting.
The BD81A44MUV is available in a compact VQFN32 package, saving PCB space and simplifying thermal management.