ST’s Duodecachannel LED Driver


Here comes STMicroelectronics with their ALED1262ZT 12-channel LED driver, which supports 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 and dynamic effects in tail, stop, and indicator lights. Each channel delivers constant output current at 19V for controlling multi-LED series strings. Adjustment from 6 to 60 mA ensures a wide dimming range with high maximum brightness. The LED lighting driver responds to I2C commands from a host microcontroller. It provides two preprogrammed configurations that allow standalone operation for extra flexibility, and has diagnostic features including open-LED detection and overtemperature warning with thermal shutdown. The input-voltage range from 5.5 to 38 V allows use in direct battery-connected systems, and it 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 driver comes in a 6.4 × 7.8 mm thermally efficient HTSSOP24 exposed-pad package.