Datasheet > AS3682-EA1

AS3682-EA1

更新时间： 2022-12-20 06:20:26

品牌	Logo	应用领域
艾迈斯 - AMSCO		摄像机
页数	文件大小	规格书
43页	869K
描述
480mA Camera Lighting Management Unit

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AS3682-EA1 数据手册

austriamicrosystems

Data Sheet

AS3682

480mA Camera Lighting Management Unit

1 General Description

2 Key Features

The AS3682 is a low-noise, high-current charge pump

designed for camera flash LEDs and LCD backlighting

applications. The device is capable of driving up to

480mA of load current.

High-Efficiency High-Power Charge Pump

- 1:1, 1:1.5, and 1:2 Intelligent Adaptive Mode Set-

ting (IAMS)

- Efficiency up to 95%

The AS3682 integrates two independent LED blocks for

driving a single flash LED (CURR11 to CURR13) with up

to 480mA, and general purpose LEDs (CURR2 to

CURR4) with up to 160mA/LED. The general purpose

LEDs are controlled individually and can be used for

backlighting, but also in support of an RGB fun-light or a

movie indicator lamp.

- Soft Start to Reduce Inrush Current

- Low-Noise Constant-Frequency Operation

Current Sinks

- 400mA Continuous Flash Current (@VIN = 3.2 to

5V, VOUT = 5V)

- 480mA Maximum Pulsed Flash Current

The AS3682 utilizes austriamicrosystems' patent-pend-

ing Intelligent Adaptive Mode Setting (IAMS) to switch

between 1:1, 1:1.5, and 1: 2 modes. In combination with

very-low-drop-out current sinks, the device achieves

high efficiency over the full single-cell Li+ battery voltage

range. The charge pump operates at a fixed frequency

of 1MHz allowing for tiny external components and its

design ensures low EMI and low input-ripple.

- Programmable: 0 to 160mA, 0.625mA Resolution

Flexible Brightness Control

- Three 0 to 160mA LEDs

- Individually Addressable via I²C Interface

Three Operating Modes

- Normal Mode (I²C Interface)

- Soft Flash Mode (I²C Interface)

- Dedicated Control Pins for Hard Flash Modes

The ultra-flexible brightness control scheme allows for

simple adaptation of the device to different system archi-

tectures.

Two General Purpose Inputs/Outputs

- Digital Input, Output, and Tristate

In Normal and Soft Flash Modes the device is controlled

by an I²C interface. In these modes the LED brightness,

flash duration, GPIOs and various charge pump states

are controlled by internal register settings. The GPIO

pins can act as programmable input or output pins and

can also be set to trigger preview and flash light directly

by a camera module.

- Programmable Pull-Up and Pull-Down

- Strobe Pin can be used for Camera Flash Control

LED Disconnect in Shutdown

Open LED Detection

Low Stand-By Current (6µA), Interface Fully

Operating

In Hard Flash Mode, the LED brightness is controlled by

the Enable pins. Those programming pins can be used

as simple enable pins, as PWM input, again offering

ample flexibility for setting the LED brightness.

Low Shut-Down Current (0.2µA)

Wide Battery Supply Range: 3.0 to 5.5V

Thermal Protection

24-Pin, Small Form-Factor QFN Package

- 4 x 4 x 0.85mm, 0.5mm Pitch

- Enhanced Thermal Characteristics

3 Applications

Lighting management for cameras, mobile telephones,

PDAs, and other 1-cell Li+ or 3-cell NiMH powered

devices.

www.austriamicrosystems.com

Revision 2.21

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与AS3682-EA1相关器件

型号	品牌	获取价格	描述	数据表
AS3682-EA2	AMSCO	获取价格	480mA Camera Lighting Management Unit
AS3682-EB1	AMSCO	获取价格	480mA Camera Lighting Management Unit
AS3682-EB2	AMSCO	获取价格	480mA Camera Lighting Management Unit
AS3682-PDM	AMSCO	获取价格	480mA Camera Lighting Management Unit
AS3683	AMSCO	获取价格	1A Backlight and Camera LED Power Charge Pump
AS3684E	OHMITE	获取价格	POT 2M OHM 1/2W CARBON LINEAR
AS3685A	AMSCO	获取价格	Ultra Small High Efficiency 700mA Charge Pump for White LED Flash
AS3685A	TAOS	获取价格	Ultra Small High Efficiency 1000mA Charge Pump
AS3685A_11	AMSCO	获取价格	Ultra Small High Efficiency 1000mA Charge Pump for White LED Flash
AS3685A-ZDFT-2Y80	AMSCO	获取价格	Ultra Small High Efficiency 1000mA Charge Pump for White LED Flash

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