Smallest-footprint LED backlight driver enables larger automotive displays

Smallest-footprint LED backlight driver enables larger automotive displays

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Maxim Integrated (San Jose, CA) has introduced an automotive LED backlight driver with integrated LCD bias that it claims reduces design size by up to one-third versus competitive solutions.
By Christoph Hammerschmidt

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The MAX20069 integrates a TFT-LCD bias with four rails plus four 150-mA LED backlight drivers – an industry first says the company. The device is designed to enable automotive infotainment designers to upgrade to bigger, higher-resolution displays with greater ease, reduced cost, and smaller solution size.

“Automotive manufacturers are using more screens, larger panels, and brighter displays across several vehicle lines to support a safer and more engaging experience on the road,” says Szukang Hsien, executive business manager, Automotive Business Unit, Maxim Integrated. “Maxim’s integrated LED backlight driver and TFT-LCD bias solution supports newer panel types to help automotive manufacturers adopt lower-cost yet higher-resolution panels with smaller solution size and a high level of integration.”

The MAX20069 supports larger screen sizes and higher resolution by providing both a positive and negative analog supply voltage, both of which are required for low-temperature polysilicon panels (LTPS) that deliver higher resolution and lower cost than the amorphous silicon panels now currently in use. The device also supports the high currents that next-generation displays require, with 150 mA per channel in the four-channel LED driver for eight-inch or larger displays and higher resolutions.

Other key specifications include a 10,000:1 pulse-width modulation (PWM) dimming ratio at 200 Hz, an I2C interface, and a 2.2-MHz switching frequency, spread spectrum, and phase-shift capabilities to help mitigate interference and emissions. The MAX20069 operates over the -40°C to 105°C ambient temperature range and is available in a 6 x 6- mm TQFN package.

Pricing is $4.40 (1000-up, FOB USA). An evaluation kit – the MAX20069EVKIT – is available for $45.

Maxim Integrated

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