CAT4137

更新时间： 2024-11-17 22:40:07

品牌	Logo	应用领域
CATALYST		驱动器转换器升压转换器
页数	文件大小	规格书
14页	504K
描述
CMOS Boost Converter- White LED Driver

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CAT4137 数据手册

CAT4137

CMOS Boost Converter - White LED Driver

Features

Product Description

Drives up to 5 White LEDs from 3V

The CAT4137 is a DC/DC step-up converter that

delivers a regulated output current. Operation at

a constant switching frequency of 1MHz allows

the device to be used with small value external

ceramic capacitors and inductor.

Power Efficiency up to 87%

Low Quiescent Ground Current 0.1mA

Adjustable Output Current (up to 30mA)

High Frequency 1MHz Operation

“Zero” current shutdown mode

Operates down to 2V (from two AA batteries)

Soft start power-up

The device drives a string of white LEDs

connected in series and provides the regulated

current to control the LEDs with inherent uniform

brightness and matching. An external resistor R1

sets the output current and allows up to 30mA

current to be supported over a wide range of

input supply voltages from 2.2V to 5.5V, making

the device ideal for battery-powered applications.

Open LED low power mode

Automatic shutdown at 1.9V (UVLO)

Thermal shutdown protection

Thin SOT23 5-Lead (1mm max height)

Applications

LED dimming can be done by using a DC

voltage, a logic signal, or a pulse width

modulation (PWM) signal. The shutdown control

pin allows the device to be placed in power-down

mode with “zero” quiescent current.

LCD Backlighting

Cellular Phones

Handheld Devices

Digital Cameras

In addition to thermal protection and overload

current limiting, the device also enters a very low

power operating mode during “Open LED” fault

conditions. The device is housed in a low profile

(1mm max height) 5-lead thin SOT23 package for

space critical applications.

Ordering Information

Part Number

Package

Quantity Package

per Reel Marking

CAT4137TS TSOT23-5

CAT4137TD TSOT23-5

Lead Free¹

3000

Note 1: NiPdAu Lead Plating

Pin Configuration

Typical Application Circuit

Top View

5-Lead Thin SOT23

1mm max height

L: Murata LQH32CN220

D: Central CMDSH2-3 (rated 30V)

1 of 14

Doc. 5012 , Rev. A

Characteristics subject to change without notice

12 3 4 5 6 7...14

中文翻译

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与CAT4137相关器件

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CAT4137TD	CATALYST	获取价格	CMOS Boost Converter- White LED Driver
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CAT4137TD-T3	ONSEMI	获取价格	CMOS Boost Converter - White LED Driver
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