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| Active-Semi FEATURES * ActivePath Selection TM Product Brief, 24-Sep-09 Advanced InformationAll Information Subject to Change ACT8935 Nine Channel ActivePathTM Power Management IC GENERAL DESCRIPTION Li+ Charger with System Power The ACT8935 is a complete, cost effective, highlyefficient ActivePMUTM power management solution that is ideal for a wide range of high performance portable handheld applications such as personal navigation devices (PNDs). This device integrates the ActivePathTM complete battery charging and management system with seven power supply channels. The ActivePath architecture automatically selects the best available input supply for the system. If the external input source is not present or the system load current is more than the input source can provide, the ActivePath supplies additional current from the battery to the system. The charger is a complete, thermally-regulated, stand-alone singlecell Li+ charger. REG1, REG2, and REG3 are fixed-frequency, current-mode step-down DC/DC converters. REG1 and REG3 are capable of supplying up to 900mA of output current, while REG2 supports up to 700mA. REG4, REG5, REG6, and REG7 are high performance, low-noise, low-dropout linear regulators that output up to 150mA each. Finally, an I2C serial interface provides programmability for the DC/DC converters and LDOs. * Seven Integrated Regulators - 2x900mA High Efficiency Step-Down DC/DCs - 700mA High Efficiency Step-Down DC/DC - 4x150mA Low Noise, High PSRR LDOs * * * * * Flexible Interrupt Control IC 2 TM Serial Interface Minimal External Components Compatible with USB or AC-Adapter Charging 5x5mm, Thin-QFN (TQFN55-40) Package - Only 0.75mm Height, - RoHS Compliant APPLICATIONS * Personal Navigation Devices * Portable Media Players * Smart Phones SYSTEM BLOCK DIAGRAM CHGIN ACIN CHGLEV nSTAT ISET TH PBIN PWRHLD PWREN EXTON nPBSTAT SCL SDA nIRQ nRSTO nLBO LBI System Control ActivePath & Single-Cell Li+ Battery Charger TM Li+ Battery VSYS REG1 Step-Down DC/DC REG2 Step-Down DC/DC REG3 Step-Down DC/DC REG4 LDO REG5 LDO REG6 LDO OUT1 0.6V to 3.9V Up to 900mA OUT2 0.6V to 3.9V Up to 700mA OUT3 0.6V to 3.9V Up to 900mA OUT4 0.6V to 3.9V Up to 150mA OUT5 0.6V to 3.9V Up to 150mA OUT6 0.6V to 3.9V Up to 150mA OUT7 0.6V to 3.9V Up to 150mA Pb Pb-free ACT8935 ActivePMU TM REG7 LDO Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of Philips Electronics. -1- www.active-semi.com Copyright (c) 2009Active-Semi, Inc. Active-Semi PRODUCT OPTIONS Block ActivePath CHGR REG1 REG2 REG3 REG4 REG5 REG6 REG7 Product Brief, 24-Sep-09 ACT8935 Capability Up to 2.4A Function System Power Selection Battery Charger Step-Down DC/DC Step-Down DC/DC Step-Down DC/DC LDO LDO LDO LDO Output Voltage 4.6V 4.20V (4.10V to 4.30V available) 0.6V to 3.9V Programmable up to 1A 900mA 700mA 900mA 150mA 150mA 150mA 150mA 0.6V to 3.9V : Output voltage options detailed in this table represent standard voltage options, and are available for samples or production orders. Contact Active-Semi for more information regarding semi-custom output voltage combinations. : Contact factory for additional available products or custom requirements. FUNCTIONAL BLOCK DIAGRAM (Optional) AC Adaptor USB ACIN BODY SWITCH BODY SWITCH Active-Semi ACT8935 VSYS System Supply 4.3V to 7V CHGIN VSYS ActivePath Control BAT Li+ Battery nSTAT CURRENT SENSE CHARGE STATUS VOLTAGE SENSE 100A + TH CHGLEV Charge Control PRECONDITION 2.9V VP1 ISET nRSTO THERMAL REGULATION To VSYS 110C REG1 SW1 OUT1 OUT1 GP12 VP2 SW2 REG2 OUT2 OUT2 GP12 VP3 PBIN PUSH BUTTON nPBSTAT To VSYS nIRQ PWRHLD SW3 REG3 PWREN EXTON SCL INL BAT SDA LBI VSYS nLBO 1.2V REG4 LDO REG5 LDO REG6 LDO REG7 LDO OUT4 To VSYS OUT3 OUT3 GP3 System Control To VSYS OUT4 OUT5 OUT5 OUT6 OUT6 OUT7 OUT7 + REFBP Reference GA EP Innovative PowerTM -2- www.active-semi.com Copyright (c) 2009 Active-Semi, Inc. |
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