LT3466

更新时间： 2024-11-03 22:46:55

品牌	Logo	应用领域
凌特 - Linear		转换器肖特基二极管
页数	文件大小	规格书
20页	325K
描述
Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes

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中文翻译

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LT3466 数据手册

LT3466

Dual Full Function White LED

Step-Up Converter with

Built-In Schottky Diodes

FEATURES

DESCRIPTIO

LT^®3466 is a dual full function step-up DC/DC converter

specifically designed to drive up to 20 White LEDs (10 in

series per converter) with a constant current. Series

connection of the LEDs provides identical LED currents

resulting in uniform brightness and eliminating the need

for ballast resistors and expensive factory calibration.

■

Drives Up to 20 White LEDs (10 in Series

per Converter) from a 3.6V Supply

■

Two Independent Step-Up Converters Capable of

Driving Asymmetric LED Strings

Independent Dimming and Shutdown Control

of the Two LED Strings

Internal Schottky Diodes

Internal Soft-Start Eliminates Inrush Current

Open LED Protection (42V Max V_OUT

Fixed Frequency Operation Up to 2MHz

81% Efficiency Driving 16 White LEDs at 15mA

(Eight per Driver) from a 3.6V Supply

Wide Input Voltage Range: 2.7V to 24V

Tiny (3mm × 3mm) 10-Lead DFN Package

■

The two independent converters are capable of driving

asymmetric LED strings. The dimming of the two LED

strings can also be controlled independently. The LT3466

is ideal for providing backlight for main and sub-displays

in cell phones and other handheld devices.

■

)

■

The LT3466 operating frequency can be set with an

external resistor over a 200kHz to 2MHz range. A low

200mV feedback voltage minimizes power loss in the

current setting resistor for better efficiency. Additional

features include output voltage limiting when LEDs are

disconnected and internal soft-start.

APPLICATIO S

■

Main/Sub Displays

■

Digital Cameras, Sub-Notebook PCs

The LT3466 is available in a low profile, small footprint

(3mm × 3mm × 0.75mm) DFN package.

■

PDAs, Handheld Computers

Automotive

■

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

TYPICAL APPLICATIO

3V TO 5V

Conversion Efficiency

1µF

= 3.6V

8/8 LEDs

47µH

SW2

47µH

SW1

LED1

LED2

OUT2

OUT1

2.2µF

LT3466

FB1

FB2

CTRL1

GND CTRL2

63.4k

SHUTDOWN

AND DIMMING

CONTROL 2

10Ω

AND DIMMING

CONTROL 1

LED CURRENT (mA)

3466 F01a

3466 F01b

Figure 1. Li-Ion Powered Driver for 8/8 White LEDs

3466f

12 3 4 5 6 7...20

中文翻译

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与LT3466相关器件

型号	品牌	获取价格	描述	数据表
LT3466-1	Linear	获取价格	20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN
LT3466-1	ADI	获取价格	采用 3mm x 3mm DFN 封装的白光 LED 驱动器和升压型转换器
LT3466EDD	Linear	获取价格	Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes
LT3466EDD#PBF	Linear	获取价格	LT3466 - Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes; Pac
LT3466EDD#TR	Linear	获取价格	LT3466 - Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes; Pac
LT3466EDD#TRPBF	Linear	获取价格	暂无描述
LT3466EDD-1	Linear	获取价格	White LED Driver and Boost Converter in 3mm ×
LT3466EDD-1#PBF	Linear	获取价格	LT3466-1 - White LED Driver and Boost Converter in 3mm x 3mm DFN Package; Package: DFN; Pi
LT3466EDD-1#TR	Linear	获取价格	暂无描述
LT3466EFE	Linear	获取价格	LT3466 - Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes; Pac

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