ACT8828 Rev 7, 15-Nov-12 TM Six Channel ActivePath Power Management IC FEATURES GENERAL DESCRIPTION TM The patent-pending ACT8828 is a complete, cost ActivePath Li+ Charger with System Power TM effective, highly-efficient ActivePMU power Selection management solution that is ideal for a wide range of Four Integrated Regulators: high performance portable handheld applications such 1.3A High Efficiency Step-Down DC/DC as personal navigation devices (PNDs). This device 1.0A High Efficiency Step-Down DC/DC integrates the ActivePath complete battery charging 0.55A High Efficiency Step-Down DC/DC and management system with four power supply 30V Step-Up DC/DC for up to 7s 3p WLEDs channels. 2 TM I C Serial Interface The ActivePath architecture automatically selects the best available input supply for the system. If the Minimal External Components external input source is not present or the system load Compatible with USB or AC-Adapter Charging current is more than the input source can provide, the 55mm, Thin-QFN (TQFN55-40) Package ActivePath supplies additional current from the battery to the system. The charger is a complete, thermally- Only 0.75mm Height regulated, stand-alone single-cell linear Li+ charger RoHS Compliant that incorporates an internal power MOSFET. APPLICATIONS REG1, REG2, and REG3 are three independent, fixed-frequency, current-mode step-down DC/DC Personal Navigation Devices converters that output 1.3A, 1.0A, and 0.55A, respectively. REG4 is a fixed-frequency, step-up Portable Media Players DC/DC converter that safely and efficiently biases Smart Phones strings of up to 7 white-LEDs (up to a total of 21 LEDs) for display backlight applications. Finally, an 2 I C serial interface provides programmability for the DC/DC converters. The ACT8828 is available in a tiny 5mm 5mm 40- pin Thin-QFN package that is just 0.75mm thin. SYSTEM BLOCK DIAGRAM Li+ Battery CHG IN Programmable TM CHGLEV ActivePath Up to 1A DCCC & VSYS Single-Cell Li+ ISET REG1 Battery Charger Step-Down OUT1 ACIN Adjustable, or DC/DC nSTAT 0.8V to 4.4V Up to 1.3A REG2 nPBIN OUT2 Step-Down Adjustable, or DC/DC nIRQ 0.8V to 4.4V nRSTO Up to 1.0A REG3 SCL Step-Down OUT3 Adjustable, or DC/DC SDA System 0.8V to 4.4V Control ON1 Up to 0.55A REG4 ON2 Step-Up OUT4 ON3 DC/DC Up to 30V 7s x 3p WLEDs ON4 ACT8828 TM VSEL ActivePMPMUU TM Innovative Power - 1 - www.active-semi.com TM TM ActivePMU and ActivePath are trademarks of Active-Semi. Copyright 2012 Active-Semi, Inc. 2 TM I C is a trademark of NXP. ACT8828 Rev 7, 15-Nov-12 TABLE OF CONTENTS GENERAL INFORMATION .......................................................................................... P. 01 Functional Block Diagram ...................................................................................................... p. 03 Ordering Information .............................................................................................................. p. 04 Pin Configuration .................................................................................................................... p. 04 Pin Descriptions ..................................................................................................................... p. 05 Absolute Maximum Ratings .................................................................................................... p. 07 SYSTEM MANAGEMENT ........................................................................................... P. 08 Register Descriptions ............................................................................................................. p. 08 2 I C Interface Electrical Characteristics ................................................................................... p. 09 Electrical Characteristics ........................................................................................................ p. 10 Register Descriptions ............................................................................................................. p. 11 Typical Performance Characteristics ...................................................................................... p. 12 Functional Description ............................................................................................................ p. 13 STEP-DOWN DC/DC CONVERTERS .......................................................................... P. 17 Electrical Characteristics ........................................................................................................ p. 17 Typical Performance Characteristics ...................................................................................... p. 20 Register Descriptions ............................................................................................................. p. 22 Functional Description ............................................................................................................ p. 28 STEP-UP DC/DC CONVERTERS ................................................................................ P. 31 Electrical Characteristics ........................................................................................................ p. 31 Typical Performance Characteristics ...................................................................................... p. 32 Register Descriptions ............................................................................................................. p. 33 Functional Description ............................................................................................................ p. 35 TM ActivePath CHARGER ............................................................................................. P. 37 Electrical Characteristics ........................................................................................................ p. 37 Typical Performance Characteristics ...................................................................................... p. 39 Functional Description ............................................................................................................ p. 41 PACKAGE INFORMATION .......................................................................................... P. 50 TM Innovative Power - 2 - www.active-semi.com TM TM ActivePMU and ActivePath are trademarks of Active-Semi. Copyright 2012 Active-Semi, Inc. 2 TM I C is a trademark of NXP.