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參數資料
| 型號： | IR2E51Y |
| 廠商： | Sharp Corporation |
| 英文描述： | Auto-Brightness Control LED Driver |
| 中文描述： | 自動亮度控制LED驅動器 |
| 文件頁數： | 1/13頁 |
| 文件大?。?/td> | 175K |
| 代理商： | IR2E51Y |
IR2E51Y
IR2E51Y
Auto-Brightness Control
LED Driver
■
Applications
1.Back light and call alert display
(White & RGB LED)
■
Features
1.
Supply Voltage Range: V
IN
=3.0V to 4.5V, V
CC
=2.3V to 3.2V
2.
Supports I
2
C-Bus interface
SCL pin and SDA pin are installed with noise filters.
4.
Sink-type variable constant current driver for LED
(maximum current 27.4mA/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 2kHz to 5kHz is recommended.)
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)
■
Agency approvals/Compliance
1. Compliant with RoHS directive(2002/95/EC)
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 before using any SHARP device.
Sheet No.: F1-A00101EN
Date Dec.01.2006
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 I
2
C-Bus interface.
This product is optimum for use as the backlight white
LED driver IC for cellular phone and PDA applications, etc.
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