ADP8861 Analog Devices, ADP8861 Datasheet - Page 2

• Manufacturer Part Number: ADP8861
• Description: Charge Pump, 7-Channel Smart LED Driver with I2C Interface
• Manufacturer: Analog Devices

Specifications of ADP8861

• Vin Range: 2.5 to 5.5V
• Vout (v): 4.3 to 5.5
• Synchronous: No
• Package: 20-Lead LFCSP,20-Lead WLCSP
• Led Configuration: Parallel
• Topology: Capacitive
• I2c Support: Yes
• Max Iout (ma): 60mA
• Brightness Control: PWM
• Peak Efficiency (%): 89%
• Switching Frequency: 1.32MHz
• Over Volt Protection (v): 5.8V

ADP8861
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Typical Operating Circuit ................................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ...................................................................... 11
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
Changes to Layout Guidelines Section ........................................ 19
Updated Outline Dimensions ....................................................... 39
Changes to Ordering Guide .......................................................... 40
4/10—Revision 0: Initial Version
I
Maximum Temperature Ranges ................................................. 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Power Stage.................................................................................. 12
Operating Modes ........................................................................ 13
Backlight Operating Levels ....................................................... 14
Backlight Maximum and Dim Settings ................................... 14
2
C Timing Diagram .................................................................... 4
Rev. A | Page 2 of 40
Applications Information .............................................................. 19
I
Outline Dimensions ....................................................................... 39
2
C Programming and Digital Control ........................................ 21
Automated Fade In and Fade Out ............................................ 14
Backlight Turn On/Turn Off/Dim ........................................... 15
Automatic Dim and Turn Off Timers ..................................... 15
Fade Override ............................................................................. 16
Independent Sink Control ........................................................ 16
Short-Circuit Protection Mode ................................................ 16
Overvoltage Protection .............................................................. 17
Thermal Shutdown/Overtemperature Protection ................. 17
Interrupts ..................................................................................... 17
Determining the Transition Point of the Charge Pump ....... 19
Layout Guidelines....................................................................... 19
Example Circuits ........................................................................ 20
Backlight Register Descriptions ............................................... 26
Independent Sink Register Descriptions ................................. 31
Ordering Guide .......................................................................... 40