ST integrates window control into door controller IC
Today, equipment manufacturers use relays to drive the electric-window motors. ST’s newest door actuator driver redefines the established system topology, removing the need for mechanical relays in car-window control. The device slashes component costs and eliminates expensive electromagnetic compatibility (EMC) countermeasures associated with existing solutions, while offering smoother and quieter car-window operation. 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.
The 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.
For more information visit www.st.com.