MANHASSET, NY -- STMicroelectronics has developed a digital control chip to replace the mechanical relay in car-door electronics.
ST’s door actuator driver redefines the established system topology, removing the need for mechanical relays in car-window control. This slashes component costs and eliminates expensive electromagnetic compatibility (EMC) countermeasures, associated with the existing solutions.
The L99DZ80 embeds an SPI-programmable slew-rate control IP that can drive 4 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.