AS3685B-T【PDF 3/25 页】IC DVR PHOTOFLASH 1A 10-DFN

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AS3685A/AS3685B

Datasheet

Table of Contents

1

2

3

4

5

6

7

8

9

General Description........................................................................................................................................... 1

Key Features ..................................................................................................................................................... 1

Applications ....................................................................................................................................................... 1

Application Diagram .......................................................................................................................................... 1

Characteristics................................................................................................................................................... 3

5.1 Absolute Maximum Ratings..................................................................................................................... 3

5.2 Operating Conditions .............................................................................................................................. 3

5.3 Electrical Characteristics ......................................................................................................................... 4

Typical Operation Characteristics...................................................................................................................... 6

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

External Components ...................................................................................................................................... 17

8.1 Capacitor and Resistor Selection .......................................................................................................... 17

8.2 Usage of PCB Wire Inductance............................................................................................................. 17

8.3 External Component Specifications ...................................................................................................... 17

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

www.austriamicrosystems.com/ AS3685

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