LTC3524

更新时间： 2024-11-12 05:43:55

品牌	Logo	应用领域
凌特 - Linear		驱动器
页数	文件大小	规格书
16页	259K
描述
Adjustable TFT Bias Supply with WLED Driver

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中文翻译

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LTC3524 数据手册

LTC3524

Adjustable TFT Bias Supply

with WLED Driver

FEATURES

DESCRIPTION

The LTC^®3524 is an integrated BIAS and white LED power

convertersolutionforsmall/medium-sizedpolysiliconthin

ﬁlm transistor (TFT) liquid crystal (LCD) display panels.

The device operates from a single Lithium-Ion/polymer

battery or any voltage source between 2.5V and 6V.

■

Generates Three Adjustable, Low Noise Rails for

Small/Medium TFT Displays

■

Drives Up to Ten White LEDs

■

LED Dimming and Open-Circuit Protection

■

Controlled Power-Up/Power-Down Sequencing

■

1.5MHz Fixed Frequency, Low Noise Operation

A 1.5MHz synchronous boost converter generates a pro-

grammable low noise, high efﬁciency 25mA TFT supply

of up to 6.0V. Regulated, low ripple charge pumps are

used to generate up to +20V and –20V at 2mA. Output

sequencing is internally controlled to insure proper

initialization and rapid discharge of the LCD panel in

shutdown.

■

V Range 2.5V to 6V, V

Range 3V to 6V

OUT

■

TFT Supply Efﬁciency Up to 90%

LED Supply Efﬁciency Up to 78%

Two Independantly Enabled LED Strings

200 to 1 True Color PWM^TMDimming

Tiny External Solution

24-Lead QFN Package (4mm × 4mm × 0.75mm)

A second 1.5MHz boost converter powers one or two LED

strings with up to ﬁve series elements each. LED current

anddisplaybrightnesscanbecontrolledoverawiderange

using analog or digital means up to 25mA.

APPLICATIONS

■

PDAs, Palmtop Computers

■

Digital Still and Video Cameras

The LTC3524 is offered in the 4mm × 4mm 24-pin QFN

package, minimizing the total solution footprint.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

True Color PWM is a registered trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

■

Handheld GPS

Portable Instrument Displays

■

Portable Media Players

TYPICAL APPLICATION

LCD Bias and LED Efﬁciency

V_IN= 3.6V, V_OUT= 5V, 8 LEDs

+5V, –7.5V, +12.5V, 8 LED Power Supply

100

= 3.6V

–

10μH

3.3μH

2.2μF

Li-Ion

10μF

SW1

SW2

VLED

LCD

LED

+5V

25mA

OUT

LED2

10μF

324k

220k

FBVO

VNIN

V2x

LED1

+10V

PROG

100k for 20mA

ELED2

ELED1

ELCD

LTC3524

0.47μF

0.1μF

–

470k

+12.5V

2mA

FBN

OUT

0.47μF

OR LED STRING CURRENT (mA)

–7.5V

2mA

OUT

FBH

3524 TA01b

–

CH GND CN

0.47μF

0.1μF

3524 TA01a

3524f

12 3 4 5 6 7...16

中文翻译

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与LTC3524相关器件

型号	品牌	获取价格	描述	数据表
LTC3524EUF	Linear	获取价格	Adjustable TFT Bias Supply with WLED Driver
LTC3524EUF#PBF	Linear	获取价格	LTC3524 - Adjustable TFT Bias Supply with WLED Driver; Package: QFN; Pins: 24; Temperature
LTC3524EUF#TRPBF	Linear	获取价格	LTC3524 - Adjustable TFT Bias Supply with WLED Driver; Package: QFN; Pins: 24; Temperature
LTC3524EUF-PBF	Linear	获取价格	Adjustable TFT Bias Supply with WLED Driver
LTC3524EUF-TR	Linear	获取价格	Adjustable TFT Bias Supply with WLED Driver
LTC3524EUF-TRPBF	Linear	获取价格	Adjustable TFT Bias Supply with WLED Driver
LTC3525	ADI	获取价格	具输出断接功能的 400mA 微功率同步升压型 DC/DC 转换器
LTC3525-3	Linear	获取价格	400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect
LTC3525-3.3	Linear	获取价格	400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect
LTC3525-3.3_15	Linear	获取价格	400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect

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