ACT8704 Four Channel Integrated Power Management Handheld Portabl
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Product Brief, 09-Nov-07 Advanced Information Information Subject Change
ACT8704
Four Channel Integrated Power Management Handheld Portable Equipment FEATURES
Multiple Patents Pending Battery Charger with Integrated MOSFET
ON/OFF Control Status Indication
GENERAL DESCRIPTION
patent-pending ACT8704 complete, costeffective, highly-efficient ActivePMUpower management solution that ideal wide range portable handheld equipment. This device integrates step-down DC/DC converters processor core power, step-up DC/DC converter with over-voltage protection (OVP) fullfeatured, linear-mode battery charger into single, thin, space-saving package. REG1 REG2 fixed-frequency, current-mode step-down DC/DC converters that optimized high efficiency capable supplying 550mA 750mA, respectively. REG3 fixed-frequency, step-up DC/DC converter that safely efficiently biases string seven white-LEDs backlighting. battery charger incorporates internal power MOSFET thermally regulated charging single-cell battery. ACT8704 available tiny 24pin Thin-QFN package that just 0.75mm thin.
Three Integrated Regulators
550mA Step-Down DC/DC 750mA Step-Down DC/DC Step-Up DC/DC with WLED Bias
Minimal External Components 4x4mm, Thin-QFN (TQFN44-24) Package
Only 0.75mm Height RoHS Compliant
APPLICATIONS
Portable Devices PDAs Digital Media Players Battery Operated Devices Receivers, etc.
SYSTEM BLOCK DIAGRAM
CHGLEV nSTAT
Single Cell Battery Charger
Battery 100mA/500mA
REG1
Step-Down DC/DC nMSTR nIRQ nRSTO System Control
OUT1 1.2V 3.3V 550mA OUT2 1.2V 3.3V 750mA
REG2
Step-Down DC/DC
REG3
ACT8704
Step-Up DC/DC
OUT3 WLED Bias
Innovative Products. Active Solutions.
ActivePMUis trademark Active-Semi.
www.active-semi.com Copyright 2007 Active-Semi, Inc.
ACT8704
Product Brief, 09-Nov-07
PRODUCT OPTIONS
Block
CHGR REG1 REG2 REG3
Function
Battery Charger Step-Down DC/DC
Output Voltage
4.20V (4.10V 4.30V available) 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V
Capability
100mA/500mA 550mA 750mA
Step-Down DC/DC Step-Up DC/DC 27.5V
WLEDs
Output voltage options detailed this table represent standard voltage options, available samples production orders. Contact Active-Semi more information regarding semi-custom output voltage combinations. Contact factory additional available products custom requirements.
FUNCTIONAL BLOCK DIAGRAM
VSYS
BODY VSYS CONTROL
ACT8704
Battery
Adaptor
4.3V
VINUVLO
CURRENT SENSE VOLTAGE SENSE PRECONDITION
nSTAT
4.0V
CHARGE STATUS
Charge Control
2.9V
THERMAL REGULATION
OUT2 CHGLEV FLOAT
110°C Battery
OUT2 nRSTO REG1 OUT1 OUT1 GP12 VSYS nMSTR
Battery
REG2
PUSH BUTTON OUT2 nIRQ
OUT2 OUT2 GP12
System Control REG3 OVP3 Battery OUT3
Innovative Products. Active Solutions.
www.active-semi.com Copyright 2007 Active-Semi, Inc.
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