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.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.