New LED drivers for LCD backlights contribute to lower power consumption

20-04-2023 | ROHM Semiconductor | Automotive & Transport

ROHM has developed the 4ch/6ch LED driver ICs, BD83A04EFV-M, BD83A14EFV-M, and BD82A26MUF-M, created for medium to large-size displays in-car infotainment and instrument clusters.

Conventional LED drivers use large amounts of power and are sensitive to flickering during PWM dimming. In contrast, the company has created LED drivers for LCD backlights that integrate proprietary low-power technology with seamless PWM dimming. This stops flickering when changing the display brightness from low to high.

These new products use proprietary low-power consumption technology to decrease losses in LED driver current control circuits. This results in 20% lower overall IC power consumption than traditional products under typical conditions (80mA/ch LED circuit current, 12V power supply). This adds to lower power consumption in medium- to large-sized automotive displays where power consumption is problematic.

At the same time, all models are provided with DC and PWM dimming to satisfy a wide range of conditions. As there no longer exists a necessity to switch current feedback mode for low/high brightness change with the company's original seamless PWM dimming technology, the flickering that ensues with general PWM dimming is lowered, improving system reliability.

Typical application areas include instrument clusters, car infotainment, head-up displays, and electronic mirrors (side/rear view).


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