Intersil has introduced what it says is a highly integrated laser diode driver for automotive heads-up display (HUD) systems. The ISL78365 pulses four high intensity lasers up to 750mA for projecting full-HD colour video onto the windshield at nearly twice the current of competitive solutions. The higher current and faster switching speed allows HUDs with high resolution, high colour-depth and high frame-rate projections, noted the company.


The quad-channel ISL78365 claims to be a complete solution for driving lasers in the scanned-MEMS laser projection systems being deployed in next generation autos. It is the industry's only laser driver with a fourth channel for supporting a wide variety of laser diode configurations, allowing system designers to achieve the desired brightness and sharp, rich colours with high contrast, Intersil said. The ISL78365 provides sub-1.5ns rise and fall times for faster switching speed than competitive devices, resulting in high frame rate, HD colour video. The device also offers 10bit colour and 10bit scale resolution to support a variety of contrast levels for each driver channel. And its flexible synchronous parallel video interface supports pixel rates up to 150MHz or 1900 pixels per line.

The ISL78365's dynamic power management optimises the laser-diode power supply and offers three power saving modes for improved efficiency and reduced power dissipation to meet system thermal requirements. The programmable multi-pulse return to zero (RTZ) feature reduces speckling, and the device's wettable flank QFN package simplifies integration into compact laser projection HUDs.

The ISL78365 can be combined with the ISL78206 2.5A synchronous buck regulator, ISL78201 2.5A synchronous buck/boost regulator, ISL78233 3A synchronous buck regulator, ISL78302 dual 302mA LDO and ISL29125 digital RGB colour light sensor to provide a complete power supply system for automotive laser projection HUDs.

The quad-channel ISL78365 laser diode driver is available in a 6mm x 6mm 40-lead WFQFN package and is priced at $9.82 in 1k quantities.