ACT3704
Rev2, 26-Jul-07
12V Linear-Mode Battery Charger for Li+/Li-polymer Cells
FEATURES
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Internal High Voltage MOSFET
Up to 12V Input Voltage
±0.5% Output Voltage Accuracy
Charge Current Thermal Foldback
Programmable Termination Voltage
Programmable Fast Charge Current
Programmable Charging Timer
No Blocking Diode Required
Low Reverse Leakage
Preconditioning for Deeply Depleted Battery
Low Quiescent Current Standby Mode
Space-Saving, Thermally-Enhanced SOP-
8/EP, TDFN33-8
GENERAL DESCRIPTION
The ACT3704 is a complete linear charging solution
for single cell Lithium Ion and Lithium Polymer bat-
teries. It incorporates an internal 12V power MOS-
FET for Constant-Current, Constant-Voltage control
(CC/CV).
The battery regulation voltage accuracy is ± 0.5%
and can be set to either 4.1V or 4.2V. The charge
current is programmed with an external resistor to a
maximum of 1A to minimize total charge time.
The reverse leakage current from the battery is less
than 1µA if the input adaptor is disconnected or if
there is a reverse battery connection. The ACT3704
is available in thermally-enhanced SOP-8/EP, and
TDFN33-8 packages to accommodate high charge
current operation and minimize total charging time.
APPLICATIONS
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Mobile Phone
Wireless Headsets
Portable Media Players
Cradle Chargers
Portable Devices
TYPICAL APPLICATION CIRCUIT
Innovative Products.
Active Solutions.
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