AS3685C datasheet(2/22 Pages) AMSCO

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AS3685C

austriamicrosystems

Datasheet

www.austriamicrosystems.com/AS3685

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General Description

The AS3685 is low noise high efficiency capacitive

charge pump with 1:1, 1:1.5 and 1:2 operating

modes in a small 3x3mm DFN10 or a tiny 2x1.5mm

WL-CSP (Wafer Level Chip Scale Package)

package. It can drive one flash led at up to 1000mA

current. It supports flash/torch and indicator mode

for the flash led.

Additionally the AS3685 limits the flash time

automatically to protect the flash LED.

Key Features

High Efficiency capactive charge pump with 1:1,

1:1.5 and 1:2 modes

− 1:2 Mode can be disabled by interface

Up to 1000mA Led Current

Automatic Charge Pump Mode switching (Up)

LED cathode disconnect in Shutdown

Overtemperature Protection

Automatic Flash Timeout to protect the LED

− Adjustable between off, 100ms…1500ms

Two Wire Interface

− Accurate Control of Currents and Modes

Package

− DFN10 3x3mm (10 pins + exposed pad)

− WL-CSP (Wafer Level Chip Scale Package)

3x4 balls 0.5mm pitch (2x1.5mm)

Applications

Flash / Torch for Mobile Phones, Digital

Cameras and PDA

Application Diagram

Figure 1 – Application Diagram of AS3685C

AS3685C

Ultra Small High Efficiency 1000mA Charge Pump for White

LED Flash with Two Wire Serial Interface

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