Car door-window controller IC drives four external MOSFETs

STMicroelectronics has introduced a multi-functional door-zone driver with an integrated electric-window control. The company's newest door actuator driver removes the need for mechanical relays in car-window control. The innovation slashes component costs and eliminates expensive electromagnetic compatibility (EMC) countermeasures, associated with the existing solutions. ST’s new door-zone driver supports adjustable window speeds related to the position of the window - soft start and shutdown - and reduces noise levels with the removal of the relay as well.

ST’s L99DZ80 embeds an SPI-programmable slew-rate control IP that can drive four external MOSFETs in a half-bridge configuration dedicated to PWM (Pulse Width Mode)-driven electric-window applications. Other features include six bridges for double door-lock control, mirror fold, and mirror-axis control, together with a high-side driver for mirror defroster, bulbs and LEDs. The device also integrates a control block with an external MOS transistor for charging and discharging of electrochromic (dimmable) mirror glasses.

The newest addition to ST’s family of microcontroller-driven multi-functional car-door actuator drivers, the L99DZ80 is available in volumes.


STMicroelectronics N.V.