Tokyo Japan, May 10, 2012 - New Japan Radio Co., Ltd. (New JRC) has introduced to the market the NJW4605, LED driver for backlight of medium/small sized LCD panels suitable for in-car equipments such as car navigation system, rear entertainment monitors and so on.
The NJW4605 is a high efficiency LED driver for LCD panel backlights consists of three constant current drivers and a step-up switching regulator allowing up to 24 LEDs driving. Various controls such as LED current control, error detection etc. by microcomputer are available though the I2C serial interface.
The NJW4605 offers an industry-leading high accuracy brightness control (PWM dimming signal duty ratio 0.1% min.), which can show a little differences of brightness. It also has high accuracy LED string current and string-to-string tolerance both kept within ±2.0% (max.), which can reduce uneven coloring caused by the characteristics variation between LEDs.
Therefore the NJW4605 is especially suitable for LCD panel requiring high quality in color rendition.
When changing LED brightness, the NJW4065 automatically generates the interpolated value between previous brightness and newly brightness set by CPU. It generates interpolated dimming PWM pulse by up to 1,024-step, which can offer natural brightness control without CPU stress.
Internal step-up switching regulator with external clock synchronous function can reduce interference by radio waves, because the external clock minimizing radio wave interference can be input from host CPU. Therefore the NJW6405 is suitable for in-car equipments such as car navigation systems.
|Type No.||Function||Engineering sample (ES)||Mass production (MP)||Reference price|
|NJW4605||LED driver for LCD panel backlights||available||Already available
from May 2012