ACE4704
Fully 5A, 4cell Standalone Li-ion Battery Charger
Description
The ACE4704 is a PWM switch-mode lithium ion battery charger controller for 4 cell li-ion battery in a
small package using few external components.
The ACE4704 is specially designed for charging lithium ion batteries with constant current and constant
voltage mode. In constant voltage mode, the regulation voltage is fixed at 16.8V with
±1%
accuracy. The
constant charging current is programmable with a single sense resistor.
Deeply discharged batteries are automatically trickle charged at 15% of the programmed constant
charging current until the cell voltage exceeds 11.2V. The charge cycle is terminated once the charging
current drops to a level set by an on-chip resistor and an external resistor, and a new charge cycle
automatically restarts if the battery voltage falls below 16V. ACE4704 will automatically enter sleep mode
when input voltage is lower than battery voltage.
Other features include undervoltage lockout, battery temperature monitoring and status indication, etc.
Features
Wide Input Voltage: 7.5V to 28V
Complete Charger Controller for 4 cell Lithium-ion Battery
Charge Current Up to 5A
High PWM Switching Frequency: 300KHz
Constant Charging Voltage Accuracy:
±1%
Charging Current is programmed with a sense resistor
Automatic Conditioning of Deeply Discharged Batteries
End-of-Charge Current can be set by an external resistor
Battery Temperature Monitoring
Automatic Recharge
Charger Status Indication
Soft Start
Battery Overvoltage Protection
Application
Notebook Computers, Model Plane
Battery-Backup Systems, Portable Industrial and Medical Equipment
Standalone Battery Chargers
Absolute Maximum Ratings
Parameter
Voltage from VCC, VG, DRV, CHRG, DONE to GND
Voltage from CSP, BAT to GND
Voltage from COM3 to GND
Voltage from Other Pins to GND
Storage Temperature
Operating Ambient Temperature
Lead Temperature (Soldering, 10 seconds)
Max
-0.3 ~ 30
-0.3 ~ 28
6.5
-65 ~ 150
-40 ~ 85
300
Unit
V
V
V
℃
℃
℃
VER 1.2
1
-0.3 ~ V
COM3
+0.3 μA
ACE [ ACE TECHNOLOGY CO., LTD. ]
