Equipped with DC/PWM dimming… Supports a wide range of design specifications
Contribution to low-power consumption in automotive applications

ROHM has developed an LED driver for LCD backlights that is resistant to flicker from low to high brightness and low power consumption through proprietary low power consumption technology and Seamless PWM dimming.

ROHM announced on the 31st that it has developed 4-channel LED driver ICs 'BD83A04EFV-M' and 'BD83A14EFV-M' for medium-sized automotive displays, such as car infotainment and vehicle meter clusters, and 6-channel LED driver IC 'BD82A26MUF-M' for large displays.

▲ ROHM LED driver package image (Image courtesy of ROHM)

With the recent evolution of ADAS and the increase in car infotainment functions, the size of automotive displays is accelerating.

Accordingly, for LED drivers for LCD backlights installed in automotive displays, high-efficiency driving is required that simultaneously achieves an increase in rated output current and a reduction in power consumption.
ROHM's new product reduces losses in the current control circuit of the LED driver through proprietary low-power consumption technology.

Accordingly, when compared under standard specification conditions of LED circuit current of 80mA/ch and power supply voltage of 12V, the total power consumption of the IC can be reduced by approximately 20% compared to existing products, contributing to low power consumption in automotive applications equipped with medium to large displays where power consumption is particularly important.

In addition, all new products are equipped with two types of dimming, DC dimming and PWM dimming, enabling compatibility with a wide range of specifications.

For PWM dimming, ROHM's proprietary Seamless PWM dimming, which does not require switching current feedback modes from low brightness to high brightness, has been adopted.

Since there is no need to switch current feedback modes between low and high brightness levels, which is a cause of flicker in general PWM dimming, the risk of flicker can be reduced, thereby contributing to improved reliability of the application.

Mass production began in November 2022 with a production capacity of 100,000 units per month (sample price 900 yen/unit, excluding tax).

The production bases are ROHM Hamamatsu Co., Ltd. (Hamamatsu) for the front-end process and ROHM Electronics Philippines, Inc. (Philippines) for the back-end process, and the parts can also be purchased from online component distribution sites such as CoreStaff and Chip 1 Stop.

ROHM stated, “These new products are equipped with PWM dimming and DC dimming in all models, enabling them to support a wide range of specifications,” and announced, “ROHM will contribute to the evolution of next-generation mobility by promoting the development of products that contribute to enhancing the functionality and reducing power consumption of next-generation automotive cockpits, focusing on its strength in analog technology.”