Datasheet > LTC3210EUD-1

LTC3210EUD-1

更新时间： 2024-11-22 01:22:35

品牌	Logo	应用领域
Linear Systems		/
页数	文件大小	规格书
16页	225K
描述
MAIN/CAM LED Controller in 3mm 3mm QFN

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中文翻译

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LTC3210EUD-1 数据手册

LTC3210

MAIN/CAM LED Controller

in 3mm × 3mm QFN

Features

Description

n Low Noise Charge Pump Provides High Efficiency

TheLTC^®3210isalownoisechargepumpDC/DCconverter

designed to drive four MAIN LEDs and one high current

CAM LED for camera lighting. The LTC3210 requires only

four small ceramic capacitors and two current set resis-

tors to form a complete LED power supply and current

controller.

with Automatic Mode Switching

n Multimode Operation: 1x, 1.5x, 2x

n Individual Full-Scale Current Set Resistors

n Up to 500mA Total Output Current

n Single Wire EN/Brightness Control for MAIN and

CAM LEDs (8 Brightness Steps)

Built-in soft-start circuitry prevents excessive inrush cur-

rent during start-up and mode changes. High switching

frequency enables the use of small external capacitors.

Independent MAIN and CAM full-scale current settings

are programmed by two external resistors. Shutdown

mode and current output levels are selected via two logic

inputs.

n 64:1 Brightness Control Range for MAIN Display

n Four 25mA Low Dropout MAIN LED Outputs

n One 400mA Low Dropout CAM LED Output

n Low Noise Constant Frequency Operation*

n Low Shutdown Current: 3µA

n Internal Soft-Start Limits Inrush Current During

Startup and Mode Switching

n Open/Short LED Protection

n No Inductors

n 3mm × 3mm 16-Lead Plastic QFN Package

The full-scale current through the LEDs is programmed

via external resistors. ENM and ENC are toggled to adjust

the LED currents via internal counters and DACs. The

part is shut down when both ENM and ENC are low for

150µs (typ).

applications

n Multi-LED Light Supply for Cellphones/DSCs/PDAs

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

*Protected by U.S. Patents including 6411531.

The charge pump optimizes efficiency based on the volt-

age 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 en-

ter dropout. The LTC3210 is available in a 3mm × 3mm

16-lead QFN package.

typical application

4-LED MAIN Display

Efficiency vs V_BATVoltage

2.2µF

100

C1P C1M

BAT

C2P

C2M

MAIN

CAM

CPO

BAT

2.2µF

LTC3210

MLED1

MLED2

MLED3

MLED4

CLED

ENM

ENC

ENM

ENC

4 LEDs AT 9mA/LED

(TYP V AT 9mA = 3V, NICHIA NSCW100)

3210 TA01

= 25°C

GND

3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4

(V)

30.1k

24.3k

BAT

3210 TA01b

3210fb

ꢀ

12 3 4 5 6 7...16

中文翻译

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与LTC3210EUD-1相关器件

型号	品牌	获取价格	描述	数据表
LTC3210EUD-1#TRPBF	Linear	获取价格	暂无描述
LTC3210EUD-1-PBF	Linear	获取价格	MAIN/CAM LED Controller with 64-Step Brightne
LTC3210EUD-1-TRPBF	Linear	获取价格	MAIN/CAM LED Controller with 64-Step Brightne
LTC3210EUD-2#PBF	Linear	获取价格	LTC3210-2/LTC3210-3 - MAIN/CAM LED Controllers with 32-Step Brightness Control in 3mm x 3m
LTC3210EUD-2-PBF	Linear	获取价格	MAIN/CAM LED Controllers with 32-Step Brightn
LTC3210EUD-2-TRPBF	Linear	获取价格	MAIN/CAM LED Controllers with 32-Step Brightn
LTC3210EUD-3	Linear Systems	获取价格	MAIN/CAM LED Controller in 3mm x 3mm QFN
LTC3210EUD-3#PBF	Linear	获取价格	LTC3210-2/LTC3210-3 - MAIN/CAM LED Controllers with 32-Step Brightness Control in 3mm x 3m
LTC3210EUD-3#TRPBF	Linear	获取价格	暂无描述
LTC3210EUD-3-PBF	Linear	获取价格	MAIN/CAM LED Controllers with 32-Step Brightn

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