LT3476EUHF-TRPBF

更新时间： 2024-12-01 05:43:31

品牌	Logo	应用领域
凌特 - Linear		驱动器
页数	文件大小	规格书
12页	180K
描述
High Current Quad Output LED Driver

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中文翻译

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LT3476EUHF-TRPBF 数据手册

LT3476

High Current

Quad Output LED Driver

DESCRIPTIO

FEATURES

True Color PWM^TMDimming Delivers Up to 5000:1

The LT^®3476 is a quad output DC/DC converter designed

to operate as a constant-current source for driving high

currentLEDs.Aﬁxedfrequency,currentmodearchitecture

results in stable operation over a wide range of supply and

output voltages. A frequency adjust pin allows the user to

program switching frequency between 200kHz and 2MHz

to optimize efﬁciency and external component size.

■

Dimming Ratio (In Boost Conﬁguration)

■

LED Current Regulation with High-Side Sense

■

VADJ Pin Accurately Sets LED Current Sense

Threshold Over Range 10mV to 120mV

■

Four Independent Driver Channels with 1.5A, 36V

Internal NPN Switches

■

Frequency Adjust Pin: 200kHz to 2MHz

The LT3476 senses output current at the high side of

the LED. High side current sensing is the most ﬂexible

scheme for driving LEDs, allowing buck, boost or buck-

boost conﬁgurations. Each current monitor threshold is

trimmed to within 2.5% at the full scale of 105mV. With

an external sense resistor, the user programs the output

current range of each channel. Each of the four regulators

is independently operated by that channel’s PWM signal.

This PWM feature allows precise adjustment of the color

mixing or dimming ratio of the LED source. Dimming

ratios up to 1000:1 can be achieved.

■

High Efﬁciency Conversion = Up to 96%

■

Open LED Protection

■

Low Quiescent Current

22mA in Active Mode

<10μA in Shutdown Mode

■

Wide V Range: 2.8V to 16V

■

Thermally Enhanced, 38-Lead, 5mm × 7mm

QFN Package

APPLICATIO S

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

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

the property of their respective owners.

■

RGGB Lighting

■

Automotive and Avionic Lighting

■

TFT LCD Backlighting

Constant-Current Sources

■

TYPICAL APPLICATIO

100W Quad 1A × 8 LED Driver

1000:1 PWM Dimming at 100Hz

33V

CAP1

100mΩ

LED1

CAP2

100mΩ

LED2

CAP3

100mΩ

LED3

CAP4

100mΩ

LED4

PWM

5V/DIV

2.2μF

× 4

UP TO

8 LEDS

0.22μF

LED

500mA/DIV

3476 TA02

5μs/DIV

10μH

1.05V

SW1

SW2

SW3

SW4

REF

VADJ1-4

4.99k

100k

CAP1-4

LED1-4

2.8V TO 16V

LT3476

VC1-4

PWM1-4

SHDN

2.2μF

PWM1-4

SHDN

GND

21k

1nF

3476 TA01

3476fa

12 3 4 5 6 7...12

中文翻译

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与LT3476EUHF-TRPBF相关器件

型号	品牌	获取价格	描述	数据表
LT3476IUHF	Linear	获取价格	IC LED DISPLAY DRIVER, PQCC38, 5 X 7 MM, PLASTIC, MO-220WHKD, QFN-38, Display Driver
LT3476IUHF#PBF	Linear	获取价格	LT3476 - High Current Quad Output LED Driver; Package: QFN; Pins: 38; Temperature Range: -
LT3476IUHF#TR	Linear	获取价格	IC LED DISPLAY DRIVER, PQCC38, 5 X 7 MM, PLASTIC, MO-220WHKD, QFN-38, Display Driver
LT3476IUHF#TRPBF	Linear	获取价格	LT3476 - High Current Quad Output LED Driver; Package: QFN; Pins: 38; Temperature Range: -
LT3477	Linear	获取价格	PWM LED Driver and Boost, Flyback and SEPIC Controller
LT3477	ADI	获取价格	具有双通道轨至轨电流检测功能的 3A、DC/DC 转换器
LT3477EFE	Linear	获取价格	3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
LT3477EFE#TRPBF	Linear	获取价格	LT3477 - 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense; Package: TSSOP; Pins: 2
LT3477EUF	Linear	获取价格	3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
LT3477EUF#PBF	Linear	获取价格	暂无描述

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