While most driver assistance functions in modern cars are connected to and controlled by electronic systems, windows of all things are using reliable Old-fashiond electromagnetic pulses.
ST’s 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. The »L99DZ80« embeds an SPI-programmable slew-rate1 control IP that can drive 4 external MOSFETs in a half-bridge configuration dedicated to PWM-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.