Datasheet

ADP8863
Rev. A | Page 2 of 52
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Typical Operating Circuit ................................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
I
2
C Timing Diagram .................................................................... 4
Absolute Maximum Ratings ............................................................ 5
Maximum Temperature Ranges ................................................. 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ...................................................................... 11
Power Stage.................................................................................. 12
Operating Modes ........................................................................ 13
LED Groupings ........................................................................... 14
LED Current Settings ................................................................. 14
Automated Fade In and Fade Out ............................................ 14
Independent Sink Control ......................................................... 15
RGB Color Generation .............................................................. 15
Automated RGB Color Fades ................................................... 15
Backlight Operating Levels ....................................................... 16
Backlight Turn On/Turn Off/Dim ........................................... 16
Automatic Dim and Turn Off Timers ..................................... 16
Fade Override ............................................................................. 17
Ambient Light Sensing .............................................................. 17
Automatic Backlight Adjustment ............................................. 18
Using the ADP8863 to Drive Additional LEDs ...................... 19
Operating LEDs from Alternative Supplies ............................ 20
Short-Circuit Protection Mode ................................................ 21
Overvoltage Protection .............................................................. 21
Thermal Shutdown/Overtemperature Protection ................. 21
Interrupts ..................................................................................... 21
Applications Information .............................................................. 23
Layout Guidelines....................................................................... 23
I
2
C Programming and Digital Control ........................................ 24
Backlight Register Descriptions ............................................... 29
Independent Sink Register Descriptions ................................. 36
Comparator Register Descriptions .......................................... 44
Outline Dimensions ....................................................................... 48
Ordering Guide .......................................................................... 49
REVISION HISTORY
6/10—Rev. 0 to Rev. A
Changes to Features Section and General Description Section . 1
Changes to Thermal Resistance Section and Table 3 ................... 5
Added Figure 4; Renumbered Sequentially .................................. 6
Changes to Table 4 ............................................................................ 6
Updated Outline Dimensions ....................................................... 48
Changes to Ordering Guide .......................................................... 49
4/10—Revision 0: Initial Version