ADP1660

Data Sheet

Rev. 0 | Page 2 of 28

TABLE OF CONTENTS

Features .............................................................................................. 1

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

Functional Block Diagram .............................................................. 1

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

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Recommended Specifications: Input and Output Capacitance

and Inductance ............................................................................. 4

I2C-Compatible Interface Timing Specifications ..................... 5

Absolute Maximum Ratings............................................................ 6

Thermal Data ................................................................................ 6

Thermal Resistance ...................................................................... 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 8

Theory of Operation ...................................................................... 10

White LED Driver ...................................................................... 10

Modes of Operation ................................................................... 10

Assist Light Mode....................................................................... 11

Flash Mode .................................................................................. 11

Assist to Flash Mode .................................................................. 12

Torch Mode ................................................................................. 12

Torch to Flash Mode .................................................................. 12

TxMASK Operation................................................................... 12

Independent Trigger Modes...................................................... 13

Fixed 5 V Output Mode............................................................. 13

Frequency Foldback................................................................... 13

Low Battery LED Current Foldback ........................................ 13

Battery Input DC Current Limit .............................................. 14

Fixed 5 V Output Mode with Torch ........................................ 15

Safety Features................................................................................. 16

Short-Circuit Fault ..................................................................... 16

Overvoltage Fault ....................................................................... 16

Dynamic Overvoltage Protection Mode ................................. 16

Timeout Fault.............................................................................. 16

Overtemperature Fault .............................................................. 16

Current Limit.............................................................................. 16

Input Undervoltage .................................................................... 16

Soft Start ...................................................................................... 16

Reset Using the Enable (EN) Pin ............................................. 16

Clearing Faults............................................................................ 16

I2C Interface .................................................................................... 17

Register Map ................................................................................... 18

Register Details........................................................................... 18

Applications Information .............................................................. 24

External Component Selection ................................................ 24

PCB Layout...................................................................................... 25

Outline Dimensions....................................................................... 26

Ordering Guide .......................................................................... 26

REVISION HISTORY

10/12—Revision 0: Initial Version