Li+ Battery Charger
• Programmable Charge Current Up to 900mA
• 4.2V Charge Termination Voltage with ±25mV
• 80mA Trickle Charge Current (RIREF=100kΩ)
• Thermal Regulation Simplifies Board Design
• External Thermistor Monitor
• Programmable Maximum Charge Time
• Enable/Disable Control
• Charge Status and Fault Indication Outputs
• Lead Free and Green Devices Available
• Mobile Phones
• GPS Navigation
• Blue Tooth Headsets
Simplified Application Circuit
The APL3209 is a constant-current/constant-voltage lin-
ear charger for single cell Li+ batteries. The APL3209
needs no external MOSFETs or diodes, and accepts in-
put voltage up to 6.5V.
On-chip thermal regulation protects the APL3209 from
excessive temperature, and optimizes the board design
for compact size and typical thermal conditions. The
APL3209 monitors the ambient or battery temperature
and maximum charge time, the charge will stop and indi-
cate a fault when the temperature is out of range or the
charge time is longer than the limit. Charge current can
program by connecting an external resistor from IREF to
Other features include a STATUS output to indicate the
charge states, and a FAULT output to indicate the fault
conditions. An EN input switches the charger on or off.
The APL3209 is available in a DFN3x3-10 package, and
operates over the -40°C to +85°C temperature range.
EP = Exposed Pad
(Connected to the ground plane for better heat dissipation)
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.2 - Jun., 2010