Datasheet > CS1937

CS1937

更新时间： 2024-11-18 00:04:23

品牌	Logo	应用领域
SAMES		电子驱动手机便携式
页数	文件大小	规格书
6页	209K
描述
CS1937ES5是DC/DC升压型白光LED驱动IC,可以替代多种型号:LT1937,AIC1896,RT9271,LM2703,CP2126,MP3205,AT1308X等.广泛应用于手机、MP3等便携式电子设备。

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CS1937 数据手册

CS1937

Step-up DC/DC Converter for White LEDs

Description

Features

●Inherently Matched LED Current

●High Efficiency: 84% Typical

CS1937 is a step-up DC-DC converter

specially designed to drive white LEDs with

●Drives Up to 4 LEDs from a 3.2V Supply a constant current. The device can drive

●Drives Up to Six LEDs from a 5V Supply 2, 3 or 4 LEDs in series from a Li-lon cell.

●36V Rugged Bipolar Switch

Series connection of the LEDs provides

identical LED currents resulting in uniform

●Fast 1.2MHz Switching Frequency

●Requires Only 0.22uF Output Capacitor brightness and eliminating the need for

●Uses Tiny Inductors

●SOT23-5(6) Package

ballast resistors. The CS1937 switches at

1.2MHz, allowing the use of tiny external

components. The output capacitor can be

as small as 0.22uF, saving space and

cost. A low 95mV feedback voltage

minimizes power loss in the current setting

resistor for better efficiency.

Applications

● Cellular Phones

● PDA, Notebook, Digital Cameras

● MP3, MP4, GPS Receiver

Typical Application

12 3 4 5 6

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