Datasheet > STLD20D_06

STLD20D_06

更新时间： 2024-09-25 03:30:51

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
31页	436K
描述
White LED power supply

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中文翻译

获取价格

数据手册

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STLD20D_06 数据手册

STLD20D

White LED power supply

General features

■ Typical guaranteed efficiency: 80%

■ Drives up to 4 LEDs in series from a 2.8V up to

4.2V supply voltage

■ Constant current regulation over the whole

operating voltage range

■ PWM control mode

QFN 3x3 8L

SOT23-8L

■ Integrated load disconnect switch that opens

the LEDs path in shutdown mode

■ Integrated soft start peak inductor current

■ Programmable peak inductor current

Description

(STLD20D-C8 only)

■ Shutdown pin allows digital dimming control up

The STLD20D is a constant switching frequency

boost regulator mainly dedicated to supply up to 4

white LEDs connected in series. A constant LED

current is achieved by sensing the LED current

through a sensing resistor R_LED(see Figure 3.).

The device also includes a supply voltage

rejection circuit that prevents from any possible

flickering effect on the display that might happen

during input supply voltage variation. An

to 10kHz

■ Over voltage and over temperature protection

with automatic restart

■ Low shutdown current (< 1µA)

■ Small external inductor (10µH)

■ Tiny external ceramic capacitor (1µF)

integrated Load Disconnect Switch open the LED

path to eliminate the current consumption in

shutdown mode. The maximum peak inductor

current can be programmed (STLD20D-C8 only).

Application

■ White Led supply for LCD backlight

■ Mobile phone

■ PDA and organizers, MP3 players, Toys

Order code

Part number

Package

Marking

Packing

STLD20D-C8

SOT23-8L

L2D

Tape and reel

STLD20D-DEF

QFN 3x3 8L

October 2006

Rev 4

1/31

www.st.com

12 3 4 5 6 7...31

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