Datasheet > WhiteLED> RT9378

RT9378

更新时间： 2024-01-11 15:00:56

品牌	Logo	应用领域
立锜 - RICHTEK		驱动器白色LED灯泵
页数	文件大小	规格书
10页	212K
描述
4 CHs 100mA x1/x1.5/x2 Charge Pump White LED Driver

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RT9378 技术参数

Status：	Active	Vin (min) (V)：	2.8
Vin (max) (V)：	4.5	SW Freq (typ) (kHz)：	1000
Number of LEDs (max) (pcs)：	4	Iout (max)/channel (mA)：	25
Iq (typ) (mA)：	1	Dimming Control：	PWM
Topology：		Features：	Enable Input;OVP
Package Type：	WQFN2x2-12	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS9378-04.pdf

RT9378 数据手册

RT9378

4 CHs 100mA x1/x1.5/x2 Charge Pump White LED Driver

General Description

Features

^zEfficiency Up to 93% Over Li-ion Battery Discharge

^zTypical 85% Average Efficiency Over Li-ion Battery

Discharge

The RT9378 is a 4 CH WLED driver with auto mode

selection of x1, x1.5 and x2 mode with low dropout voltage

in current sources. The RT9378 can power up to 4 white

LEDs with regulated constant current for uniform intensity.

Each channel (LED1 to LED4) can support up to 25mA.

The part maintains highest efficiency by utilizing x1/x1.5/

x2 fractional charge pump and low dropout current

regulators. For the brightness control, user can easily use

a PWM signal generated from GPIO to control the

brightness of WLEDs.

^zSupport Up to 4 White LEDs

^zSupport Up to 25mA/Per Channel

^zSupport Up to 100mA Output Current

^zPWM Brightness Control

^z60mV Typical Current Source Dropout

^z1% Typical LED Current Accuracy

^z0.7% Typical LED Current Matching

^zAutomatic x1/x1.5/x2 Charge Pump Mode

Transition

The RT9378 is available in a WQFN-12L 2x2 package.

Small 0.22μF capacitors can be used for fly capacitors. It

provides the best backlighting solution with high efficiency

and smallest board space for portable application.

z Low Input Noise and EMI Charge Pump

z 5V Over Voltage Protection

z Power On/Mode Transition In-rush Protection

z 1MHz Switching Frequency

Ordering Information

RT9378

z 0.4μA Low Shutdown Current

z RoHS Compliant and Halogen Free

Package Type

QW : WQFN-12L 2x2

Applications

z Camera Phone, Smart Phone

Lead Plating System

G : Green (Halogen Free and Pb Free)

z White LED Backlighting

Note :

Richtek products are :

Pin Configurations

` 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.

(TOP VIEW)

12 11 10

C1N

GND

C1P

LED3

LED2

LED1

Typical Application Circuit

GND

FLY1

FLY2

0.22µF

C1P C1N C2P C2N

WQFN-12L 2x2

VIN

2.8V to 4.5V

1µF

LED1

LED2

LED3

LED4

RT9378

Marking Information

PWM Dimming

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

2, Exposed pad (1

GND

VOUT

1µF

OUT

DS9378-03 April 2011

www.richtek.com

12 3 4 5 6 7...10

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RT9385B	RICHTEK	5 Channels 125mA x1/x1.5/x2 Charge Pump White LED Driver	获取价格
RT9394	RICHTEK	Tiny Package, High Performance, Regulated Charge Pump	获取价格
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RT9397B	RICHTEK	Charge Pump Controller with Automatic Mode Transition	获取价格

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