Charge Pump, 7-Channel Fun Lighting LED Driver Data Sheet ADP8863 FEATURES TYPICAL OPERATING CIRCUIT V Automated blinking and funlight timing for each LED driver ALS PHOTO 16 programmable fade in and fade out times SENSOR 0.1 sec to 5.5 sec D1 D2 D3 D4 D5 D6 D7 CMP IN 0.1F Selectable linear, square, or cubic fade rates VIN C 7 independent and programmable LED drivers IN 1F VOUT 7 drivers capable of 30 mA (maximum) VDDIO C OUT 1 driver also capable of 60 mA (maximum) 1F Programmable maximum current limit (128 levels) C1+ Separate and independent controls for backlight LEDs nRST ADP8863 C1 1F Backlight fade override C1 nINT Up to two built-in comparator inputs with programmable C2+ SDA C2 modes for ambient light sensing 1F C2 SCL Charge pump with automatic gain selection of 1, 1.5, and 2 for maximum efficiency GND1 GND2 Standby mode for <1 A current consumption 2 I C-compatible interface for all programming Figure 1. Dedicated reset pin and built-in power-on reset (POR) Short-circuit, overvoltage, and overtemperature protection Internal soft start to limit inrush currents Input-to-output isolation during faults or shutdown Operation down to V = 2.5 V with undervoltage lockout IN (UVLO) at V = 2.0 V IN Available in a small 20-ball, 2.15 mm 2.36 mm 0.6 mm WLCSP or a 20-lead, 4 mm 4 mm 0.75 mm LFCSP APPLICATIONS LED indication Funlight indicator lighting Keypad backlighting RGB LED color generation and mixing General backlighting of small format displays GENERAL DESCRIPTION The ADP8863 combines a powerful charge pump driver with This entire configuration is driven by a two-capacitor charge pump advanced autonomous LED lighting features. It allows as with gains of 1, 1.5, and 2. The charge pump is capable of many as seven LEDs to be independently driven up to 30 mA driving a maximum IOUT of 240 mA from a supply of 2.5 V to (maximum). The seventh LED can also be driven to 60 mA 5.5 V. The device includes a variety of safety features including (maximum). All LEDs are programmable for maximum current short-circuit, overvoltage, and overtemperature protection. 2 and fade in/fade out times via the I C interface. These features allow easy implementation of a safe and robust design. Additionally, input inrush currents are limited via an Additionally, automated blinking routines can be independently integrated soft start combined with controlled input-to-output programmed and enabled for all seven LED channels. These isolation. LEDs can also be combined into groups to reduce the processor instructions. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20102017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 08392-001ADP8863 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Automated RGB Color Fades ................................................... 15 Applications ....................................................................................... 1 Backlight Operating Levels ....................................................... 16 Typical Operating Circuit ................................................................ 1 Backlight Turn On/Turn Off/Dim ........................................... 16 General Description ......................................................................... 1 Automatic Dim and Turn Off Timers ..................................... 16 Revision History ............................................................................... 2 Fade Override ............................................................................. 17 Specifications ..................................................................................... 3 Ambient Light Sensing .............................................................. 17 2 I C Timing Diagram .................................................................... 4 Automatic Backlight Adjustment ............................................. 18 Absolute Maximum Ratings ............................................................ 5 Using the ADP8863 to Drive Additional LEDs ...................... 19 Maximum Temperature Ranges ................................................. 5 Operating LEDs from Alternative Supplies ............................ 20 Thermal Resistance ...................................................................... 5 Short-Circuit Protection Mode ................................................ 21 ESD Caution .................................................................................. 5 Overvoltage Protection .............................................................. 21 Pin Configuration and Function Descriptions ............................. 6 Thermal Shutdown/Overtemperature Protection ................. 21 Typical Performance Characteristics ............................................. 7 Interrupts ..................................................................................... 21 Theory of Operation ...................................................................... 11 Applications Information .............................................................. 23 Power Stage.................................................................................. 12 Layout Guidelines....................................................................... 23 2 Operating Modes ........................................................................ 13 I C Programming and Digital Control ........................................ 24 LED Groupings ........................................................................... 14 Backlight Register Descriptions ............................................... 29 LED Current Settings ................................................................. 14 Independent Sink Register Descriptions ................................. 36 Automated Fade In and Fade Out ............................................ 14 Comparator Register Descriptions .......................................... 44 Independent Sink Control ......................................................... 15 Outline Dimensions ....................................................................... 48 RGB Color Generation .............................................................. 15 Ordering Guide .......................................................................... 49 REVISION HISTORY 10/2017Rev. A to Rev. B Changed CP-20-10 to CP-20-8 .................................... Throughout Updated Outline Dimensions ....................................................... 48 Changes to Ordering Guide .......................................................... 49 6/2010Rev. 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 4/2010Revision 0: Initial Version Rev. B Page 2 of 49