Datasheet > LT3964-1

LT3964-1

更新时间： 2024-04-09 19:01:10

品牌	Logo	应用领域
亚德诺 - ADI		驱动驱动器
页数	文件大小	规格书
34页	3813K
描述
具有 I2C 的双 36V 同步 2A 降压型 LED 驱动器

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中文翻译

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数据手册

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LT3964-1 数据手册

LT3964-1

Dual 36V Synchronous 2A

Buck LED Driver with I C

FEATURES

DESCRIPTION

The LT^®3964-1 is a dual synchronous step-down DC/DC

Wide Input Voltage Range: 4V to 36V

Two Independent 2A/40V Synchronous Bucks

converter with an I C interface designed to operate as a

I C Interface for Internal True Color PWM™ Dimming

constant-current and constant-voltage source and is ideal

for driving LEDs. The fixed frequency and peak current

mode topology result in stable operation over a wide range

of supply and output voltages. The ground-referred volt-

age FB pin serves as the input for several Light Emitting

Diode (LED) protection features, and allows the converter

to operate as a constant-voltage source. The maximum

output current is set by an external resistor, and the output

current amplifier has a rail-to-rail common mode range.

(8192:1), Analog Dimming and Fault Reporting

1000:1 External True Color PWM Dimming and

10:1 External Analog Dimming

P-Channel Metal-Oxide Semiconductor (PMOS)

Switch Driver for Pulse-Width Modulators (PWM)

and Output Disconnect

3% Constant Current Regulation

Adjustable Frequency: 200kHz to 2MHz

Frequency Synchronization with Clock Output

LT3964-1 uses an I C interface to communicate with a

Programmable OPENLED Protection with Reporting

microcontroller to read LED faults, write PWM and analog

Short-Circuit Protection with Reporting

dimming registers and set fault masking. The I C PWM

Programmable Undervoltage Lockout with Hysteresis

input provides LED dimming ratios up to 8192:1. The I C

Internal Compensation

9 Unique Device Addresses for I C

programmable CTRL register sets the gain of the external

CTRL pin, and maximum current sense threshold, provid-

ing additional analog dimming capability.

Available in 5mm × 6mm 36-pin Quad-flat no-leads

(QFN) Package

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents, including 7199560, 7321203, 7746300.

APPLICATIONS

General Purpose, Industrial, Medical

and Automotive Lighting

Constant-Current, Constant-Voltage Source

TYPICAL APPLICATION

50W Dual Buck 1A LED Driver

Efficiency, V_IN= 34V

100

BST1

BOTH CHANNELS ARE ON

0.22µF

31V TO 36V

(ENABLED

AT 33V,

IN1

10µH

100mΩ

10µF

×2

2.2µF

SW1

GND

100k

2.2µF

SHUT-

DOWN

AT 31V)

EN/UVLO

FB1

1A,

PWM1 PWM1

PWM2 PWM2

CTRL1

3.92k

43.2k

8 LEDs

UP TO

26V

CTRL2

INTV

ISP1

ISN1

PWMTG1

INTV

2.2µF

100k

ALERT

IN2

BST2

SW2

FB2

LT3964-1

0.22µF

INTV

2.2µF

10µH

100mΩ

GND

499k

2.2µF

SET

1A,

165k

100 200 300 400 500 600 700 800 900 1000

8 LEDs

UP TO

26V

43.2k

27.4k

2MHz

(mA)

LED

39641 TA01b

SYNC/CLKOUT

ISP2

ISN2

PWMTG2

SCL

SDA

2-WIRE

I C INTERFACE

ADDR1 ADDR2

39641 TA01a

INTV

Rev. 0

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For more information www.analog.com

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中文翻译

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与LT3964-1相关器件

型号	品牌	获取价格	描述	数据表
LT3965	Linear	获取价格	8-Switch Matrix LED Dimmer
LT3965	ADI	获取价格	8 开关矩阵 LED 调光器
LT3965-1	Linear	获取价格	8-Switch Matrix LED Dimmer
LT3966	ADI	获取价格	I2C Programmable Quad Monolithic Boost LED Driver
LT3966EUJ	ADI	获取价格	I2C Programmable Quad Monolithic Boost LED Driver
LT3966JUJ	ADI	获取价格	I2C Programmable Quad Monolithic Boost LED Driver
LT3967	ADI	获取价格	I2C to CAN-Physical Transceiver
LT3970	Linear	获取价格	40V, 350mA Step-Down Regulator with 2.5μA Qui
LT3970	Linear Systems	获取价格	High Efficiency, 65V 500mA Synchronous Step-Down Converter
LT3970	ADI	获取价格	具有2.5μA静态电流和集成二极管的40V、350mA降压型稳压器

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