SHARP developed an automatic dimming driver IC, can drive 7 series LED

SHARP has developed a drive 7 LED IR2E55Y6 with automatic dimming function of the driver IC". LED back light for small LCD panel such as mobile phone.

Automatic dimming function, refers to the brightness of the surrounding and the contrast of the image content, the LED backlight brightness is divided into 16 levels, the implementation of time-sharing control. In this way, you can achieve the best brightness display LCD panel, but also can reduce power consumption. The external brightness is detected by an external logarithmic output type illumination sensor. Using 10 x log (LX) A output sensor, can detect the luminous intensity of 3 ~ 55 thousand lx.

Because the driver IC the original LED backlight and a variety of power supply circuits, such as the 5 chip system, integrated in the 1 3.57mm square chip, the entire system is reduced by about 7. The power supply voltage driver for 2.7 ~ 3.2V. There are 2 kinds of output current for the LED, which are used for the main panel of the 0 ~ 25.6mA, as well as for incoming calls to the lights of 0 ~ 12.8mA.