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AS3685A Datasheet(PDF) 2 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Part No. AS3685A
Description  Ultra Small High Efficiency 1000mA Charge Pump
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Maker  TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]
Homepage  http://www.taosinc.com
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AS3685A Datasheet(HTML) 2 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

 
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AS3685A/AS3685B
austriamicrosystems
Datasheet
www.austriamicrosystems.com/
AS3685
(ptr)
Revision 2.2
1 - 24
1
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.
2
Key Features
High Efficiency capactive charge pump with 1:1,
1:1.5 and 1:2 modes
− 1:2 Mode can be disabled
(different device versions available)
Up to 1000mA Led Current
Automatic Charge Pump Mode switching (Up)
LED cathode disconnect in Shutdown
Overtemperature Protection
Automatic 800ms Flash Timeout to protect the
flash LED
Two Device Variants:
− AS3685A: Direct control to select three
currents
− AS3685B: Single Pin Interface or Two Pin
Interface with Strobe Input; 17 different
currents can be selected
Package
− DFN10 3x3mm (10 pins + exposed pad)
− WL-CSP (Wafer Level Chip Scale Package)
3x4 balls 0.5mm pitch (2x1.5mm)
3
Applications
Flash / Torch for Mobile Phones, Digital
Cameras and PDA
4
Application Diagram
Figure 1 – Application Diagram of AS3685A/AS3685B
C1+ C1- C2+ C2-
CFLY1 1.0 FCFLY2 1.0 F
VCP
ILED
AS3685A
AS3685B
ISET
VBAT
EN1
EN2
CBAT
2.2 F
CVCP
2.2 F
VBAT
VSS
DLED
RISET
RTXMASK
AS3685A/AS3685B
Ultra Small High Efficiency 1000mA Charge Pump for White
LED Flash
Datasheet


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