Datasheet > RT9364

RT9364

更新时间： 2022-02-26 23:24:38

品牌	Logo	应用领域
立锜 - RICHTEK		驱动
页数	文件大小	规格书
10页	183K
描述
白光LED横流驱动芯片

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数据手册

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RT9364 数据手册

Preliminary

RT9364

80mA 4-Channel Charge Pump White LED Driver

with Low Dropout Current Source

General Description

Features

^z85% Average Efficiency Over Battery Life

The RT9364 is a high performance white LED driver. It

integrates current sources and automatic mode selection

charge pump. The part maintains the high efficiency by

utilizing an x1/x1.5 fractional charge pump and low dropout

current sources. The small equivalent x1 mode open loop

resistance and ultra-low dropout voltage of current source

extend the operating time of x1 mode and optimize the

efficiency of Li-ion battery in white LED applications.

^zSupport up to 4 White LEDs

^z80mV Typical Current Source Dropout

^zSupport up to 80mA Output Current

^z1% Typical LED Current Accuracy

^z0.7% Typical LED Current Matching

^zSoft Start Function

^zAuto Charge Pump Mode Selection

^z250kHz Fixed Frequency Oscillator

^zOutput Over Voltage Protection

^z16-Step Brightness Control

The RT9364 supports up to 4 white LEDs and regulates a

constant current for uniform intensity. The part implements

a 4-bit DAC for brightness control. Users can easily

configure the LED current from 1.25mA to 20mA by a serial

pulse. The dimming of white LEDs current can be achieved

by applying a pulse signal to the ENpin. There are totally

16 steps of current could be set by users. The operating

voltage range is 2.8V to 5.0V. Internal soft start circuitry

effectively reduces the in-rush current while both start-up

and mode transition. The load is disconnected from V_IN

while shutdown and the shutdown current is less than

1μA.

^zLow Input Noise and EMI

z Low 0.3μA Shutdown Current

z RoHS Compliant and 100% Lead (Pb)-Free

Applications

z Mobile Phone, DSC, MP3

z White LED Backlighting

z LCDDisplay Supply

Pin Configurations

RT9364 is available in a WQFN3x3-16L package.

(TOP VIEW)

Ordering Information

RT9364

16 15 14 13

Package Type

QW : WQFN-16L 3x3 (W-Type)

C1N

C2N

C2P

C1P

12 LED2

LED3

LED4

GND

Operating Temperature Range

P : Pb Free with Commercial Standard

Note :

RichTek Pb-free products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

`Suitable for use in SnPb or Pb-free soldering processes.

`100% matte tin (Sn) plating.

WQFN-16L 3x3

Marking Information

For marking information, contact our sales representative

directly or through a RichTek distributor located in your

area, otherwise visit our website for detail.

DS9364-00 May 2006

www.richtek.com

12 3 4 5 6 7...10

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