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AS3685C
Datasheet
Datasheet
austriamicrosystems
AS3685C
Ultra Small High Efficiency 1000mA Charge Pump for White
LED Flash with Two Wire Serial Interface
Additionally the AS3685 limits the flash time
automatically to protect the flash LED.
2 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)
4 Application Diagram
Figure 1 – Application Diagram of AS3685C
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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)
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.
LED cathode disconnect in Shutdown
Overtemperature Protection
Automatic Flash Timeout to protect the LED
−
Adjustable between off, 100ms…1500ms
3 Applications
Flash / Torch for Mobile Phones, Digital
Cameras and PDA
1.1
al
id
1 - 21
1 General Description
AS3685C
Datasheet
Table of Contents
General Description........................................................................................................................................... 1
Key Features ..................................................................................................................................................... 1
7.2 Current Source (Sink).............................................................................................................................. 9
9 Pinout and Packaging...................................................................................................................................... 15
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