LTC3210

更新时间： 2024-11-21 05:43:51

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
16页	238K
描述
MAIN/CAM LED Controller in 3mm × 3mm QFN

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中文翻译

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LTC3210 数据手册

LTC3210

MAIN/CAM LED Controller

in 3mm × 3mm QFN

DESCRIPTIO

FEATURES

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.

■

Low Noise Charge Pump Provides High Efﬁciency

with Automatic Mode Switching

■

Multimode Operation: 1x, 1.5x, 2x

■

Individual Full-Scale Current Set Resistors

■

Up to 500mA Total Output Current

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.

■

64:1 Brightness Control Range for MAIN Display

Four 25mA Low Dropout MAIN LED Outputs

One 400mA Low Dropout CAM LED Output

Low Noise Constant Frequency Operation*

Low Shutdown Current: 3µA

Internal Soft-Start Limits Inrush Current During

Startup and Mode Switching

Open/Short LED Protection

No Inductors

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).

■

APPLICATIO S

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.

■

Multi-LED Light Supply for Cellphones/DSCs/PDAs

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

All other trademarks are the property of their respective owners.

*Protected by U.S. Patents, including 6411531.

TYPICAL APPLICATIO

4-LED MAIN Display

Efﬁciency vs V Voltage

BAT

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

3210f

12 3 4 5 6 7...16

中文翻译

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与LTC3210相关器件

型号	品牌	获取价格	描述	数据表
LTC3210-1	Linear	获取价格	MAIN/CAM LED Controller with 64-Step Brightne
LTC3210-1	ADI	获取价格	采用 3mm x 3mm QFN 封装、具 64 级亮度控制能力的主/相机 LED控制器
LTC3210-2	Linear	获取价格	MAIN/CAM LED Controllers with 32-Step Brightn
LTC3210-2	ADI	获取价格	采用 3mm x 3mm QFN 封装、具 32 级亮度控制能力的主/相机 LED 控制器
LTC3210-2_15	Linear	获取价格	MAIN/CAM LED Controllers with 32-Step Brightness Control
LTC3210-3	Linear	获取价格	MAIN/CAM LED Controllers with 32-Step Brightn
LTC3210-3_15	Linear	获取价格	MAIN/CAM LED Controllers with 32-Step Brightness Control
LTC3210EPD-1-PBF	Linear	获取价格	MAIN/CAM LED Controller with 64-Step Brightne
LTC3210EPD-1-TRPBF	Linear	获取价格	MAIN/CAM LED Controller with 64-Step Brightne
LTC3210EUD	Linear	获取价格	MAIN/CAM LED Controller in 3mm × 3mm QFN

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