Li+ Battery Charger with Thermal Regulation
• Programmable Charge Current Up to 500mA
• Charge Status Output Pin
• Soft-Start Limits Inrush Current
• 4.2V Charge Termination Voltage with ±1%
45mA Pre-charge Current (R =2K)
• Thermal Regulation Simplifies Board Design
• Enable/Disable Control
• Available in a SOT-23-5 Package
• Lead Free and Green Devices Available
• Bluetooth Applications
• MP3 Players
• Cell Phones
• Wireless Appliances
The APL3202 is a constant-current/constant-voltage lin-
ear charger for single cell Li+ batteries. The APL3202
needs no external MOSFETs or diodes, and accepts in-
put voltages up to 6.5V. The small package and low ex-
ternal component counts make the APL3202 an idea part
for portable applications.
On-chip thermal regulation protects the APL3202 from
excessive temperature and optimizes the board design
for compact size and typical thermal conditions. When
the junction temperature reaches the thermal regulation
threshold, the charger does not shut down but simply
reduces the charge current. Charge current can be pro-
grammed by connecting an external resistor from ISET
pin to GND. Using an external MOSFET to disconnect the
resistor from ground shuts down the charger, and re-
duces the input supply current down to 25µA. The
APL3202 also has the STAT pin to indicate charge status.
The APL3202 is available in a SOT-23-5 package, and
operates over the -40°C to +85°C temperature range.
Simplified Application Circuit
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.
Rev. A.3 - Mar., 2012