Automotive-grade backlight LED driver targets LCD panels

September 17, 2019 //By Julien Happich
LED driver
Compatible with 3” to 12” vehicle LCDs, Rohm’s BD81A76EFV-M LED driver IC is optimized for LCD backlight in instrument cluster, centre information displays and car navigation.

Unlike conventional drivers with 4 channels that support LCDs up to 8”, this LED driver provides 6 channels of output (with 120mA per channel) that can support LCD panels of up to 10-12” class. At the same time original buck-boost control ensures compatibility with both small and large LCDs using a single driver. This makes it possible to develop a common design of LCD control board suitable for conventional panels along with the latest large-size displays.

In contrast to conventional 6-channels backlight LED drivers using only boost control, the new driver IC can drive from 6 to 60 LEDs (1-10 LEDs/channel) to support not only larger displays but also small and medium size panels. Standby current consumption is only 10µA. Qualified to AEC-Q100, the BD81A76EFV-M integrates a spread spectrum function as a countermeasure against EMI that allows it to clear CISPR25 noise requirements for vehicle applications. The result is stable operation in automotive systems sensitive to noise.

ROHM Semiconductor -

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