12-channel automotive LED driver supports complex visual effects

October 07, 2019 //By Julien Happich
LED driver
The STMicroelectronics ALED1262ZT 12-channel LED driver support complex and innovative visual effects for advanced automotive rear combination lamps and interior lighting.

The chip features independent 7-bit PWM dimming on all channels, allowing flexible control of tail, stop, and indicator lights, with dynamic effects. Each channel delivers constant output current at 19V for controlling multi-LED series strings. Adjustment from 6mA to 60mA ensures a wide dimming range with high maximum brightness. The LED lighting driver responds to I2C commands from a host microcontroller and provides two pre-programmed configurations that allow standalone operation for extra flexibility.

With diagnostic features including open-LED detection and over-temperature warning with thermal shutdown, the ALED1262ZT ensures long-lasting robustness and stability. The input-voltage range from 5.5V to 38V allows use in direct battery-connected systems. In addition, the ALED1262ZT is designed for low-noise operation, with slow turn-on/off time per channel and spread-spectrum clock operation to simplify integration with other in-vehicle electronics. The LED driver comes in a 6.4x7.8mm thermally efficient HTSSOP24 exposed-pad package.

STMicroelectronics - www.st.com

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