APL3201 Datasheet, PDF (1/16 Pages) Anpec Electronics Coropration – Li+ Battery Charger with Thermal Regulation

APL3201
Li+ Battery Charger with Thermal Regulation
Features
• Programmable Charge Current Up to 1A
• Charge Status Output Pins
• Soft-Start Limits Inrush Current
• 4.2V Charge Voltage with ±1% Accuracy
• Fixed 55mA Prequal Charge Current
• Thermal Limiting Simplifies Board Design
• External Thermistor Monitor
• Enable/Disable Control
• 3mm x 3mm DFN-10 Package (DFN3x3-10)
• Disable Charging When V_IN > 6.4V
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• PDAs
• MP3 Players
• Cell Phones
• Wireless Appliances
General Description
The APL3201 is a constant-current/constant-voltage
linear charger for single cell Li+ batteries.
The APL3201 needs no external MOSFET or diodes, and
accepts input voltage up to 6.0V. The small packages
and low external component count make the APL3201
ideally suited for portable applications.
On-chip thermal limiting simplifies PC board layout and
allows optimum charging rate without the thermal limits
imposed by worst-case battery and input voltage. When
the APL3201 thermal limit is reached, the charger does
not shut down but simply reduces charging current.
Ambient or battery temperature can be monitored with
an external thermistor. When the temperature is out of
range, charging pauses.
Other features include the STAT1 and 2 outputs to indi-
cate four charge states, and the EN input, switches the
APL3201 on or off.
The APL3201 is available in 3mmx3mm DFN-10 package,
and operates over the -40°C to +85°C temperature range.
Simplified Application Circuit
Pin Configuration
INPUT
Voltage
VIN
BATT
LI+
CELL
VIN 1
STAT1 2
ISET 3
GND 4
EN 5
EP
(Bottom)
10 BATT
9 BYP
8 STAT2
7 REF
6 THRM
DFN3x3-10
(Top View)
Note : EP should be connected to GND plane for better heat
dissipation
STAT1
BYP
STAT2
REF
EN
ISET
THRM
GND
NTC
THERMISTOR
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.4 - Mar., 2009
www.anpec.com.tw