ACT8700 ACTIVE-SEMI | Alldatasheet

Document overview

  • Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
  • PDF pages: 2

Technical content

Innovative Products. Active Solutions. - 1 - www.active-semi.com Copyright © 2007 Active-Semi, Inc. ActivePMUTM is a trademark of Active-Semi. ACT8700 Four Channel Integrated Power Management IC for Handheld Portable Equipment SYSTEM BLOCK DIAGRAM

FEATURES

 Multiple Patents Pending  Li+ Battery Charger with Integrated MOSFET  ON/OFF Control and Status Indication  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. GENERAL DESCRIPTION The patent -pending ACT8700 is a complete, cost - effective, highly -efficient ActivePMUTM power man- agement solution that is ideal for a wide range of portable handheld equipment. This device inte- grates two step -down DC/DC converters, one step - up DC/DC converter with over -voltage protection (OVP) for WLED bias, 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 opti- mized for high efficiency and are capable of supply- ing 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 con- stant-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. Product Brief, 10-Aug-07 Advanced Product Information–All Information Subject to Change

Innovative Products. Active Solutions. - 2 - www.active-semi.com Copyright © 2007 Active-Semi, Inc. Product Brief, 10-Aug-07 PRODUCT OPTIONS FUNCTIONAL BLOCK DIAGRAM Block Function Output Voltage Capability CHGR Battery Charger 4.20V (4.10V to 4.30V available) 100mA/500mA REG1 Step-Down DC/DC 350mA REG2 Step-Down DC/DC 500mA REG3 Step-Up DC/DC Up to 27.5V Up to 7 WLEDs : Output voltage options detailed in this table represent standard voltage options, and are available for samples or producti on orders. Contact Active-Semi for more information regarding semi-custom output voltage combinations. : Contact factory for additional available products or custom requirements.