LED drivers for LCD backlights reduce power consumption of vehicle displays

LED drivers for LCD backlights reduce power consumption of vehicle displays

New Products |
By Christoph Hammerschmidt

For use in electronic vehicle displays such as instrument clusters, infotainment or electronic mirrors, Rohm has developed the BD83A04EFV-M, BD83A14EFV-M and BD82A26MUF-M 4-channel/6-channel LED driver ICs.

The ongoing development of ADAS (Advanced Driver Assistance Systems) and additional infotainment functions in vehicles requires the use of increasingly larger displays. Accordingly, LED drivers for LCD backlights in automotive displays must provide a high-efficiency supply that improves rated output current while reducing current consumption. In addition, LED drivers must prevent flickering of automotive displays.

Standard LED drivers require relatively high current and are prone to flickering during PWM dimming. Therefore, Rohm has developed LED drivers for LCD backlights that combine proprietary power-saving technology with seamless PWM dimming.

The new BD83A04EFV-M, BD83A14EFV-M and BD82A26MUF-M ICs use low current consumption technology to reduce losses in the current control circuits of LED drivers. The result is 20% lower overall IC current consumption compared to conventional products under typical conditions (80 mA/channel LED circuit current, 12 V power supply).

At the same time, all models are equipped with both DC and PWM dimming to meet a wide range of requirements. Since Rohm’s original seamless PWM dimming technology eliminates the need to switch the current feedback mode for switching between low and high brightness, the flickering that occurs with general PWM dimming is reduced, increasing system reliability.

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