Datasheet > LTC3219

LTC3219

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	212K
描述
250mA Universal Nine Channel LED Driver

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中文翻译

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LTC3219 数据手册

LTC3219

250mA Universal

Nine Channel LED Driver

FEATURES

DESCRIPTION

The LTC^®3219 is a highly integrated multidisplay LED

driver. The device contains a high efﬁciency, low noise

charge pump to provide power to nine universal LED

current sources. The LTC3219 requires only ﬁve small

ceramic capacitors to form a complete LED power supply

and current controller.

■

Multimode Charge Pump Provides Up to 91%

Efﬁciency

■

Slew Limited Switching Reduces Conducted and

Radiated Noise (EMI)

Up to 250mA Total Output Current

■

Nine 28mA Universal Current Sources with 64-Step

Linear Brightness Control

The maximum display currents are set by an internal pre-

cision current reference. Independent dimming, On/Off,

blinking and gradation control for all current sources is

■

Independent On/Off, Brightness Level, Blinking and

Gradation Control for Each Current Source Using

2-Wire I C Interface

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

■

Internal Current Reference

available for adjusting brightness levels for each universal

LED current source.

■

Conﬁgurable ENU Pin for Asynchronous LED On/Off

Control

■

The LTC3219 charge pump optimizes efﬁciency based on

the voltage across the LED current sources. The device

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

IC into 1.5x mode and a subsequent dropout switches

the LTC3219 into 2x mode. The part resets to 1x mode

whenever a data register is updated via the I C port.

, 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.

Low Noise Charge Pump Operates in 1x, 1.5x or 2x

Mode for Optimal Efﬁciency*

■

Automatic or Forced Mode Switching

■

Internal Soft-Start Limits Inrush Current

■

Short-Circuit/Thermal Protection

■

3mm × 3mm 20-Lead QFN Plastic Package

APPLICATIONS

■

Video Phones with QVGA+ Displays

TYPICAL APPLICATION

4-LED Main, 2-LED Sub and RGB

1μF

MAIN

SUB

RGB

C1P C1M C2P C2M

CPO

BAT

2.2μF

LTC3219

ULED1-9

SCL/SDA

I C

3219 TA01a

0.1μF

ENU

GND

ENABLE DISABLE

3219fa

12 3 4 5 6 7...20

中文翻译

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与LTC3219相关器件

型号	品牌	获取价格	描述	数据表
LTC3219EUD#PBF	Linear	获取价格	LTC3219 - 250mA Universal Nine Channel LED Driver; Package: QFN; Pins: 20; Temperature Ran
LTC3219EUD#TRPBF	Linear	获取价格	LTC3219 - 250mA Universal Nine Channel LED Driver; Package: QFN; Pins: 20; Temperature Ran
LTC3219EUD-PBF	Linear	获取价格	250mA Universal Nine Channel LED Driver
LTC3219EUD-TRPBF	Linear	获取价格	250mA Universal Nine Channel LED Driver
LTC3220	Linear	获取价格	360mA Universal 18-Channel LED Driver
LTC3220	ADI	获取价格	360mA 通用型 18 通道 LED 驱动器
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

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