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| Product Brief, 03-Feb-08 Advanced InformationAll Information Subject to Change ACT8710 Four Channel Integrated Power Management IC for Handheld Portable Equipment FEATURES * Multiple Patents Pending * Li+ Battery Charger with Integrated MOSFET - ON/OFF Control and Status Indication GENERAL DESCRIPTION The patent-pending ACT8710 is a complete, cost effective, highly efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates two PWM step-down DC/DC converters, one PWM step-up DC/DC converter with over-voltage protection (OVP) and a full-featured linear-mode Li+ battery charger into a single, thin, space-saving package. An I2C Serial Interface provides programmability for the DC/DC converters and battery charger. REG1 and REG2 are fixed-frequency, current-mode PWM step-down DC/DC converters that are optimized for high efficiency and are capable of supplying up to 350mA and 550mA, respectively. REG3 is a fixed-frequency PWM step-up converter that safely and efficiently biases a string of up to seven white-LEDs for backlighting. The battery charger incorporates an internal power MOSFET for constant-current/constant-voltage, thermally regulated charging of a single-cell Li+ battery. All DC/DC converters' output voltage are programmable and controllable via the I2C interface. The ACT8710 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin. * Three Integrated Regulators - 350mA Step-Down DC/DC - 550mA Step-Down DC/DC - Step-Up DC/DC with OVP for WLED Bias * I2CTM Compatible Serial Interface - Programmable Output Voltages - Configurable Operating Modes * Minimal External Components * 4x4mm, Thin-QFN (TQFN44-24) Package - Only 0.75mm Height - RoHS Compliant APPLICATIONS * Portable Devices and PDAs * Digital Media Players * Battery Operated Devices * GPS Receivers, etc. SYSTEM BLOCK DIAGRAM VIN CHGLEV nSTAT Single Cell Li+ Battery Charger Battery Programmable Up to 1A REG1 nMSTR nIRQ nRSTO SCL SDA ON1 ON2 System Control Step-Down DC/DC OUT1 1.1V to 4.4V Up to 350mA OUT2 1.1V to 4.4V Up to 550mA REG2 Step-Down DC/DC REG3 ACT8710 Active PMU TM Step-Up DC/DC OUT3 WLED Bias Innovative Products. Active Solutions. ActivePMU is a trademark of Active-Semi. I2CTM is a trademark of Philips Electronics. TM -1- www.active-semi.com Copyright (c) 2008 Active-Semi, Inc. Product Brief, 03-Feb-08 ACT8710 PRODUCT OPTIONS Block CHGR REG1 REG2 REG3 Function Battery Charger Step-Down DC/DC Step-Down DC/DC Step-Up DC/DC Output Voltage 4.20V (4.10V to 4.40V available) Programmable 1.1V to 4.4V Programmable up to 27.5V Capability Programmable up to 1A 350mA 550mA Up to 7 WLEDs : 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 VSYS Active-Semi BODY AND VSYS CONTROL ACT8710 BAT Li+ Battery + CURRENT SENSE VOLTAGE SENSE AC Adaptor 4.3V to 6V or USB VIN VINUVLO VIN CHGLEV FLOAT 4.0V Charge Control PRECONDITION 2.9V THERMAL REGULATION 110C VP1 To Battery SCL SDA OUT2 nRSTO REG1 SW1 OUT1 OUT1 GP12 Serial Interface VSYS nMSTR PUSH BUTTON OUT2 nIRQ System Control VP2 To Battery REG2 SW2 OUT2 OUT2 GP12 SW3 ON1 REG3 ON2 GA OVP3 FB3 GP3 To Battery OUT3 Innovative Products. Active Solutions. -2- www.active-semi.com Copyright (c) 2008 Active-Semi, Inc. |
Price & Availability of ACT8710
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