Datasheet > SD42511

SD42511

更新时间： 2024-09-25 06:10:43

品牌	Logo	应用领域
士兰微 - SILAN		驱动器控制器
页数	文件大小	规格书
9页	530K
描述
1A WHITE LED DRIVER WITH PWM DIMMING CONTROLLER

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SD42511 数据手册

SD42511

1A WHITE LED DRIVER WITH PWM DIMMING CONTROLLER

DESCRIPTION

The SD42511 is a step-down PWM control LED driver with a built-in

internal power MOSFET. It achieves 1A continuous output current over

a wide input supply range. It provides thermal shutdown circuit, current

limiting circuit and PWM dimming circuit.

SD42511 adopts current mode control. Current mode operation

provides fast transient response and simple loop stabilization design.

SD42511 has high efficiency up to more than 90%, and has excellent

constant current characteristic when the input/output voltage changed,

with the excellent current accuracy within ±1%. With the high input

voltage of up to 25V and built-in slope compensation, it can drive 6

LEDs.

FEATURES

ORDERING INFORMATION

* Maximum 1A output current

* 0.25Ω built-in power MOSFET

* PWM dimming function

Device

Package

SD42511

SOP-8-225-1.27

* 280KHz fixed frequency

* Excellent constant current accuracy ±1%

* High efficiency up to 90%

* Thermal shutdown

APPLICATIONS

* Power LED driver

* Cycle-by-cycle over current protection

* 6-25V input voltage range

* Drive LED string

BLOCK DIAGRAM

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.3

2008.11.19

Http://www.silan.com.cn

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