PT8A2803 Datasheet, PDF (1/8 Pages) Pericom Semiconductor Corporation – 500mA Li-ion/Polymer Battery Charger

PT8A2803
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500mA Li-ion/Polymer Battery Charger
Features
• A Constant-Current / Constant-Voltage Linear
Charger for Single-Cell Li-ion/Polymer Batteries
• Integrated Pass Element and Current Sensor
• Highly-Integrated, Requiring No External FETs or
Blocking Diode
• ±0.5% 4.2V Voltage Accuracy at Room
Temperature. ±1% All Temperatures. (Available
with 4.1V and 4.36V options upon request)
• Programmable Charge Current 50mA to 500mA
• Programmable End-Of-Charge Current by Current
Recharge Algorithm
• Pre-Charge for Fully Discharged Batteries
• Less Than 1µA Leakage Current Of the Battery
when No Input Power Attached or Charger Disabled
• Power Present and Charge Status Indications
• Thermal Regulation on Charging Current to Prevent
Over-Heat
• Available with 8-pin 2x3mm TDFN Package
Applications
• Cell-phones, PDA, MP3, MP4, PMP
• Standalone Chargers
• Bluetooth Applications
Description
The PT8A2803 is a fully integrated single-cell Li-
ion/Polymer battery charger. The charger operates in a
constant-current-constant-voltage (CC/CV) charging
profile without employing external FETs and blocking
diodes.
The fast charge current and end-of-charge (EOC) current
can be easily programmed by modifying two external
resistors. When the battery is deeply discharged to lower
than 2.8V, the charger firstly pre-charges the battery
with typically 20% of the programmable fast charge
current. When the charge current is reduced to the
programmed EOC current level (almost works
completely in a constant-voltage (CV) mode), an EOC
indication is displayed through the CHG pins.
PT8A2803 is protected by thermal regulation technology
to prevent the IC from over-heat during charging.
Two status indication pins ( PPR and CHG ), which are
both implemented as an open-drain outputs, can be used
to drive LEDs or work as logic interface to a
microprocessor. When no adapter is attached or when
the charger is disabled, the leakage current from battery
cell is less than 1µA typically.
Ordering Information
Ordering No.
Package
PT8A2803ZEE Lead free and Green 8-pin TDFN
Notes:
z E = Pb-free and Green
z Adding X Suffix= Tape/Reel
12-03-0002
PT0324-1
03/06/12
1