Datasheet > LTC3220

LTC3220

更新时间： 2024-09-25 05:43:51

品牌	Logo	应用领域
凌特 - Linear		驱动器
页数	文件大小	规格书
20页	214K
描述
360mA Universal 18-Channel LED Driver

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中文翻译

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数据手册

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LTC3220 数据手册

LTC3220/LTC3220-1

360mA Universal

18-Channel LED Driver

FEATURES

DESCRIPTION

Eighteen 20mA Universal Current Sources with

TheLTC3220/LTC3220-1arehighlyintegratedmulti-display

LEDdrivers.Thesepartscontainahighefﬁciency,lownoise

charge pump to provide power to up to eighteen universal

LED current sources. The LTC3220/LTC3220-1 require

only ﬁve small ceramic capacitors to form a complete

LED power supply and current controller.

64-Step Linear Brightness Control

Independent On/Off, Brightness Level, Blinking and

Gradation Control for Each Current Source Using

2-Wire I C Interface

Low Noise Multi-Mode Charge Pump (1x, 1.5x, 2x)

Provides Up to 91% Efﬁciency

The LED currents are set by an internal precision cur-

rent reference. Independent dimming, on/off, blinking

and gradation control for all universal current sources

Slew Limited Switching Reduces Conducted and

Radiated Noise (EMI)

Up to 360mA Total Output Current

is achieved via the I C serial interface. 6-bit linear DACs

Internal Current Reference

are available to adjust brightness levels independently for

each universal LED current source.

Single Reset Pin for Asynchronous Shutdown and

Reset of All Data Registers

TheLTC3220/LTC3220-1chargepumpoptimizesefﬁciency

based on the voltage across the LED current sources. The

part powers up in 1x mode and will automatically switch

to boost mode whenever any enabled LED current source

begins to enter dropout. The ﬁrst dropout switches the

parts into 1.5x mode and a subsequent dropout switches

the LTC3220/LTC3220-1 into 2x mode. The parts reset to

Two I C Addresses Are Available (LTC3220: 0011100,

LTC3220-1: 0011101)

Automatic or Forced Mode Switching

Internal Soft-Start Limits Inrush Current

Short-Circuit/Thermal Protection

4mm × 4mm Ultrathin (0.55mm) 28-Lead QFN

Package

1x mode whenever a data bit is updated via the I C port.

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

All other trademarks are the property of their respective owners.

Protected by U.S. Patents including 6411531.

APPLICATIONS

Video Phones with QVGA+ Displays

Keypad Lighting

General/Miscellaneous Lighting

TYPICAL APPLICATION

6-LED Main, 4 RGB LEDs

2.2μF

RGB1

RGB2

RGB3

RGB4

MAIN

C1P C1M C2P C2M

V CPO

LTC3220

LTC3220-1

4.7μF

2.2μF

ULED1-18

0.1μF

3220 TA01

SCL/SDA

I C

RESET

RST

GND

32201fb

12 3 4 5 6 7...20

中文翻译

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与LTC3220相关器件

型号	品牌	获取价格	描述	数据表
LTC3220_1	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220_15	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220-1	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220-1_15	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220EPF-1-PBF	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220EPF-1-TRPBF	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220EPF-PBF	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220EPF-TRPBF	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220IPF-1#PBF	Linear	获取价格	LTC3220/LTC3220-1 - 360mA Universal 18-Channel LED Driver; Package: UTQFN; Pins: 28; Tempe
LTC3220IPF-1#TRPBF	Linear	获取价格	LTC3220/LTC3220-1 - 360mA Universal 18-Channel LED Driver; Package: UTQFN; Pins: 28; Tempe

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