IR2E51Y Datasheet | Sharp Corporation

Description IR2E51Y incorporates white LED driver with auto brightness control. This IC is equipped with charge pump DC/DC converter. Input voltage is boosted into CPO by a charge pump circuit. This IC maintains high efficiency since the charge pump circuit automatically selects 1x or 1.5x charge pump mode depending on input voltage and load. It contains 4 white LED drivers to drive the main-LCD backlight, 2 white LED drivers for sub-LCD backlight and RGB-LED drivers. All LED are connected in parallel. With peripheral ambient light sensor, this IC automatically adjusts white LED brightness to ambient brightness. This IC supports I2C-Bus interface. This product is optimum for use as the backlight white LED driver IC for cellular phone and PDA applications, etc. - Agency approvals/pliance 1. pliant with Ro HS directive(2002/95/EC) - Applications 1.Back light and call alert display (White & RGB LED) - Features 1. Supply Voltage Range: VIN=3.0V to 4.5V, VCC=2.3V to 3.2V 2. Supports I2C-Bus interface 3. SCL pin and SDA pin are installed with noise filters. 4. Sink-type variable constant current driver for LED (maximum current 27.4m A/ch) 5. Monitoring all LED pins (Response to VF variation of LED) 6.Auto brightness control circuit for main-LCD embedded. (16 steps and 128 gradation sequence) 7.PWM LED Brightness Control (0% to 100%) (RGB) (The PWM signal frequency of 2k Hz to 5k Hz is remended.) 8.1x/1.5x Modes Charge Pump: Automatically Selected 9.Voltage reference embedded 10.Stand-by circuit embedded 11.Power-on-reset circuit embedded 12.Soft-Start Limits Inrush Current 13.Effective illuminance range (3lx to 55000lx) (GA1A1S201WP) Notice The content of data sheet is subject to change without prior notice. In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets...