Datasheet

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
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C-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
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C 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