AS3668 datasheet(1/60 Pages) AMSCO

部件名	AS3668

功能描述	4 Channel Breathl ight Cont rol ler

PDF	60 Pages

Scroll/Zoom	100%

制造商	AMSCO [ams AG]

网页	http://www.ams.com

标志

1 / 60 page

A S 3 6 6 8

4 C h a n n e l B r e a t h l i g h t C o n t r o l l e r

www.austriamicrosystems.com/AS3668

Revision 1.11

1 - 60

D a t a S h e e t

1 General Description

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.

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 10 A

(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.

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

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

Figure 1. AS3668 Block Diagram

2 Key Features

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

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

Integrated “easy to use” pattern generator for breathlight LED

function with logarithmic 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 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.

类似零件编号 - AS3668

制造商	部件名	数据表	功能描述
ams AG	AS3668	1Mb / 59P	4 Channel Breathlight Controller
	AS3668-BWLT	1Mb / 59P	4 Channel Breathlight Controller
	AS3668	1Mb / 59P	4 Channel Breathlight Controller

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