Datasheet > AS3668-BWLT

AS3668-BWLT

更新时间： 2022-05-11 01:13:01

品牌	Logo	应用领域
艾迈斯 - AMSCO		控制器
页数	文件大小	规格书
59页	1090K
描述
4 Channel Breathlight Controller

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AS3668-BWLT 数据手册

Data Sheet

AS3668

4 Channel Breathlight Controller

1 General Description

2 Key Features

High efficiency capacitive 60mA charge pump with 1:1 and 1:2

The AS3668 is a 4-channel LED driver designed to produce lighting

effects for portable devices. A highly efficient charge pump enables

LED driving over full Li-Ion battery voltage range. The device is

equipped with an internal program memory, which allows control of

LED patterns even without processor control. This helps the whole

system to save power and extend for example battery life time in

every mobile application. The AS3668 maintains excellent efficiency

over a wide operating range by automatically selecting the best

charge pump gain based on the LED forward voltage requirements

and the device input voltage.

mode

Automatic mode switching for charge pump

Automatic Pattern Mode without digital control

Highly accurate 4 Channel High Side 25.5mA current sources

Audio Controlled Lighting with internal digital filters

Charge Pump with soft start and overcurrent/short circuit pro-

tection

Furthermore the chip supports an automatic power-save mode which

gets active when LED outputs are not active. The special power-

save mode has a extremely low current consumption below 10μA

(typ.).the AS3668 has an I2C-compatible control interface which

supports two slave address without having a dedicated address

selection pin. For fancy lighting effects synchronized with an audio

signal the device supports special digital filter modes in order to

make music literally visible on the 4 independent configurable

current sources.

Integrated “easy to use” pattern generator for breathlight LED

function with logarithmic 12bit dimming

Small application circuit

Minimum number of external components

Available in 12-pin WL-CSP (1.255x1.680mm) with 0.4mm pitch

3 Applications

The AS3668 is available in a very tiny 12-pin WL-CSP

(1.255x1.680mm) 0.4mm pitch package.

The product is perfect for Mobilephones, MP3 Player, Portable

Navigation Devices, Digital Cameras, USB Dongles/Modems, Game

Controllers and can be used for fun and indicator lights, backlighting

and as programmable current sources.

Figure 1. AS3668 Block Diagram

www.ams.com/AS3668

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