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AS3685A-ZDFT-2Y80 Datasheet(PDF) 3 Page - ams AG

Part No. AS3685A-ZDFT-2Y80
Description  Ultra Small High Efficiency 1000mA Charge Pump for White LED Flash
Download  25 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3685A-ZDFT-2Y80 Datasheet(HTML) 3 Page - ams AG

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AS3685A/AS3685B
Datasheet
www.austriamicrosystems.com/
AS3685
(ptr)
Revision 2.2
2 - 24
Table of Contents
1 General Description........................................................................................................................................... 1
2 Key Features ..................................................................................................................................................... 1
3 Applications ....................................................................................................................................................... 1
4 Application Diagram .......................................................................................................................................... 1
5 Characteristics................................................................................................................................................... 3
5.1 Absolute Maximum Ratings..................................................................................................................... 3
5.2 Operating Conditions .............................................................................................................................. 3
5.3 Electrical Characteristics ......................................................................................................................... 4
6 Typical Operation Characteristics...................................................................................................................... 6
7 Detailed Functional Description......................................................................................................................... 8
7.1 Low Noise Charge Pump ........................................................................................................................ 8
7.1.1 Mode Switching........................................................................................................................ 8
7.1.2 Soft Start .................................................................................................................................. 9
7.2 Current Source (Sink).............................................................................................................................. 9
7.2.1 AS3685A Current Setting......................................................................................................... 9
7.2.2 AS3685B Current Setting....................................................................................................... 12
7.2.3 AS3685A and AS3685B TXMask Function ............................................................................ 15
7.3 Protection Functions.............................................................................................................................. 16
7.3.1 Overtemperature Protection ................................................................................................... 16
7.3.2 Flash Timeout ........................................................................................................................ 16
7.4 Layout Recommendations..................................................................................................................... 16
8 External Components ...................................................................................................................................... 17
8.1 Capacitor and Resistor Selection .......................................................................................................... 17
8.2 Usage of PCB Wire Inductance............................................................................................................. 17
8.3 External Component Specifications ...................................................................................................... 17
9 Pinout and Packaging...................................................................................................................................... 18
9.1 DFN10 3x3mm ...................................................................................................................................... 18
9.1.1 Pin Assignments DFN10 3x3mm ........................................................................................... 18
9.1.2 Pin Descriptions DFN10 3x3mm ............................................................................................ 18
9.1.3 Package Drawings and Marking DFN10 3x3.......................................................................... 19
9.2 WL-CSP 2x1.5mm (Wafer Level Chip Scale Package) ......................................................................... 21
9.2.1 Pin Assignments WL-CSP 2x1.5mm...................................................................................... 21
9.2.2 Pin Descriptions WL-CSP 2x1.5mm....................................................................................... 21
9.2.3 Package Drawings and Marking WL-CSP 2x1.5mm .............................................................. 22
10 Ordering Information........................................................................................................................................ 23


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