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| Product Brief, 10-Aug-07 Advanced Product Information-All Information Subject to Change ACT8700 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 ACT8700 is a complete, costeffective, highly-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates two step-down DC/DC converters, one stepup DC/DC converter with over-voltage protection (OVP) for WLED bias, and a full-featured, linearmode Li+ battery charger-into a single, thin, spacesaving 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 500mA, respectively. REG3 is a fixed-frequency, step-up DC/DC 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. The ACT8700 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin. Three Integrated Regulators 350mA PWM Step-Down DC/DC 500mA PWM Step-Down DC/DC Step-Up DC/DC with OVP for WLED Bias 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 Innovative Products. Active Solutions. ActivePMU TM -1- www.active-semi.com Copyright (c) 2007 Active-Semi, Inc. is a trademark of Active-Semi. Product Brief, 10-Aug-07 ACT8700 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 Up to 27.5V 500mA 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 Innovative Products. Active Solutions. -2- www.active-semi.com Copyright (c) 2007 Active-Semi, Inc. |
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