ROHM has developed 4 - and 6-channel LED drivers for LCD backlighting

     In recent years, with the development of ADAS (Advanced Driver Assistance Systems) and the increasing capabilities of in-vehicle infotainment systems, the size of in-vehicle displays is increasing. This requires higher drive efficiency for LED drivers used for LCD backlighting of on-board displays, capable of increasing rated output current while reducing power consumption. In addition, if the on-board display blinks, its visibility will be reduced and related applications will be in an unsafe state, so LED drivers are required to have high reliability.

     However, the traditional LED driver, IC itself power consumption and PWM dimming may occur flicker and other problems. Using our own low-power technology and seamless PWM dimming technology, ROHM has successfully developed LCD backlit LED drivers that consume less power and are difficult to flicker from low brightness to high brightness.

     Therefore, ROHM has successfully developed 4-channel LED driver IC "BD83A04EFV-M" and "BD83A14EFV-M" suitable for medium sized in-vehicle displays for applications such as in-vehicle infotainment systems and in-vehicle integrated instruments. And a 6-channel LED driver IC "BD82A26MUF-M" suitable for large on-board displays.

     The new product successfully reduces the loss in the LED driver current control circuit by using ROHM's own low power technology. Therefore, under conventional specification conditions (LED circuit current: 80mA/ch, power supply voltage: 12V), compared with previous products, the overall power consumption of IC can be reduced by about 20%. The use of these new products in applications equipped with medium and large on-board displays helps to further improve the key issue of such applications -- power consumption.

     In addition, the launch of each new product are equipped with DC dimming and PWM dimming two dimming mode, can support a variety of specifications. Moreover, the PWM dimming uses ROHM's own seamless PWM dimming technology to switch from low brightness to high brightness without switching its current feedback mode. When using ordinary PWM dimming mode, the current feedback mode switching between low brightness and high brightness is the cause of flicker. The new product reduces the risk of flickering by eliminating the need to switch the current feedback mode and helps improve the reliability of the application.