Datasheet > LTC3210-2

LTC3210-2

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	212K
描述
MAIN/CAM LED Controllers with 32-Step Brightness Control in 3mm × 3mm QFN

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中文翻译

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数据手册

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LTC3210-2 数据手册

LTC3210-2/LTC3210-3

MAIN/CAM LED Controllers

with 32-Step Brightness Control

in 3mm × 3mm QFN

FEATURES

DESCRIPTION

The LTC^®3210-2/LTC3210-3 are low noise charge pump

DC/DC converters designed to drive three or four MAIN

LEDs and one high current CAM LED for camera lighting.

TheLTC3210-2/LTC3210-3requireonlyfoursmallceramic

capacitorsandtwocurrentsetresistorstoformacomplete

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

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.

■

32:1 Linear Brightness Control Range for

MAIN Display

■

Three or 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

Shutdown mode and current output levels are selected

via two logic inputs. ENM and ENC are toggled to adjust

the LED currents via internal counters and DACs. A 5-bit

linear DAC (32 steps) provides high resolution brightness

control for the MAIN display.

■

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

wheneveranyenabledLEDcurrentsourcebeginstoenter

dropout. The LTC3210-2/LTC3210-3 are available in a

3mm × 3mm 16-lead QFN package.

APPLICATIONS

■

Multi-LED Light Supply for Cellphones/DSCs/PDAs

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

All other trademarks are the property of their respective owners.

*Protected by US Patents including 6411531.

TYPICAL APPLICATION

4-LED MAIN Display

Efﬁciency vs V_BATVoltage

2.2μF

100

C1P C1M

BAT

C2P

C2M

MAIN

CAM

CPO

BAT

2.2μF

LTC3210-2

MLED1

MLED2

MLED3

MLED4

CLED

ENM

ENC

ENM

ENC

4 LEDs AT 9mA/LED

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

321023 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

321023 TA01b

321023fa

12 3 4 5 6 7...16

中文翻译

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与LTC3210-2相关器件

型号	品牌	获取价格	描述	数据表
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
LTC3210EUD#TRPBF	Linear	获取价格	暂无描述
LTC3210EUD-1	Linear Systems	获取价格	MAIN/CAM LED Controller in 3mm 3mm QFN
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

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