Datasheet > W-52TDI-GT

W-52TDI-GT

更新时间： 2024-11-27 01:18:39

品牌	Logo	应用领域
尼得科 - NIDEC		/
页数	文件大小	规格书
11页	194K
描述
CMOS White LED Driver

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中文翻译

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W-52TDI-GT 数据手册

W-52

CMOS White LED Driver

Description

The W-52 is a DC/DC step up converter that delivers a regulated

output current. Operation at a constant switching frequency of

1.2 MHz allows the device to be used with very small value external

inductor and ceramic capacitors.

The W-52 is targeted to drive multiple white lightïemitting diodes

(LEDs) connected in series and provides the necessary regulated current

to control the brightness and the color purity. An external resistor R_SET

controls the output current level. LED currents of up to 40 mA can be

supported over a wide range of input supply voltages from 2 V to 7 V,

making the device ideal for batteryïpowered applications.

A high voltage output stage allows up to 4 White LEDs to be driven

in series. Series drive provides inherent current matching.

LED dimming can be done by using a DC voltage, a logic signal, or

a pulse width modulation (PWM) signal. The shutdown input pin

allows the device to be placed in powerïdown mode with “near zero”

quiescent current.

In addition to overcurrent limiting protection, the device also

includes detection circuitry to ensure protection against openïcircuit

load fault conditions.

The device is available in a low profile (1 mm max height) 6ïlead

TSOTï23 package.

TSOTï23

PIN CONNECTIONS

VIN

GND

LED

SHDN

RSET

TSOTï23

1 mm Maximum Height

= 250oC/W (free air)

(Top View)

Features

v Low Quiescent Ground Current (0.5 mA Typical)

v Power Efficiency Over 80%

v Compatible Pinout with LT1932

MARKING DIAGRAMS

v Adjustable Output Current (up to 40 mA)

v High Frequency 1.2 MHz Operation

v Input Voltage Operation down to 2.0 V

v Low Resistance (0.5 ) High Voltage Power Switch

v Drives up to 4 White LEDs in Series

v Shutdown Current Less than 1 A

VFYM

VFꢀ=ꢀW-52TDIꢀïGT3

Y = Production Year (Last Digit)

M = Production Month (1ï9, A, B, C or O, N, D)

v Load Fault Protection Against Openïcircuits

v Low Value External Components

ORDERING INFORMATION

v Low Profile (1 mm) TSOTï23 6ïlead Package

v These Devices are PbïFree, Halogen Free/BFR Free and are RoHS

Compliant

Device

Package

Shipping

TSOTï23

(PbïFree)

3,000/

Tape & Reel

W-52TDIꢀï*T3

(Note 1)

Applications

v Color LCD and Keypad Backlighting

v Cellular Phones

NiPdAu Plated Finish (RoHSïcompliant).

v Handheld Terminals

v Digital Cameras

v PDAs/Games

v Portable MP3 Players

¢ NIDEC COPAL ELECTRONICS CORP.ꢀ

'HFHPEHU,ꢀ20ꢁꢂꢀïꢀRev. ꢂ

Publication Order Number:ꢀ

W-52/(

12 3 4 5 6 7...11

中文翻译

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