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| Product Brief, 09-Nov-07 Advanced Information - All Information Subject to Change ACT8702 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 ACT8702 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 and a full-featured linear-mode Li+ battery charger into a single, thin, space-saving package. 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, step-up DC/DC converter that generates 5V for wide variety of regulated-voltage applications such as audio, motor, or USB power. The battery charger incorporates an internal power MOSFET for constant-current/constant-voltage, thermally regulated charging of a single-cell Li+ battery. The ACT8702 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 - 5V Step-Up DC/DC * 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 100mA/500mA REG1 Step-Down DC/DC OUT1 1.2V to 3.3V Up to 350mA OUT2 1.2V to 3.3V Up to 550mA nMSTR nIRQ nRSTO ON1 ON2 System Control REG2 Step-Down DC/DC REG3 ACT8702 Step-Up DC/DC OUT3 5V Innovative Products. Active Solutions. ActivePMUTM is a trademark of Active-Semi. -1- www.active-semi.com Copyright (c) 2007 Active-Semi, Inc. Product Brief, 09-Nov-07 ACT8702 Capability 100mA/500mA 350mA PRODUCT OPTIONS Block CHGR REG1 REG2 REG3 Function Battery Charger Step-Down DC/DC Output Voltage 4.20V (4.10V to 4.30V available) 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, or 3.3V Step-Down DC/DC Step-Up DC/DC 5V 550mA 1.5W : 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 BODY AND VSYS CONTROL ACT8702 BAT Li+ Battery + AC Adaptor or USB 4.3V to 6V VIN VINUVLO CURRENT SENSE VOLTAGE SENSE PRECONDITION nSTAT 4.0V CHARGE STATUS Charge Control 2.9V THERMAL REGULATION OUT2 CHGLEV FLOAT 110C VP1 To Battery OUT2 nRSTO REG1 SW1 OUT1 OUT1 GP12 VSYS VP2 nMSTR To Battery REG2 PUSH BUTTON OUT2 nIRQ SW2 OUT2 OUT2 GP12 System Control SW3 ON1 REG3 ON2 GA OUT3 GP3 GP3 To Battery OUT3 Innovative Products. Active Solutions. -2- www.active-semi.com Copyright (c) 2007 Active-Semi, Inc. |
Price & Availability of ACT8702
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