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ACE Technology

ACE4722 Datasheet Preview

ACE4722 Datasheet

Multi-Chemistry Battery Charger

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ACE4722
5A, Multi-Chemistry Battery Charger IC With Photovoltaic Cell MPPT Function
Description
The ACE4722(Note 1) is a PWM switch-mode battery charger controller that can be powered by
photovoltaic cell with maximum power point tracking function. The ACE4722 is specially designed for
charging 1 or multi-cell lithium ion batteries or LiFePO4 batteries with constant current and constant
voltage mode. In constant voltage mode, the regulation voltage is set by the external resistor divider. The
constant charging current is programmable with a single current sense resistor.
Deeply discharged batteries are automatically trickle charged at 15% of the programmed constant
charging current until the cell voltage exceeds 66.7% of the regulation voltage. In constant voltage mode,
the charging current decreases gradually, the charge cycle will be terminated when the charging current
drops to 9.5% of the full-scale current, and a new charge cycle automatically restarts if the battery voltage
falls below 95.8% of the regulation voltage in constant voltage mode.
ACE4722 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
Photovoltaic Cell Maximum Power Point Tracking
Wide Input Voltage: 7.5V to 28V
Complete Charger Controller for 1 or multi-cell Lithium-ion Battery or LiFePO4 Battery
Charge Current Up to 5A
High PWM Switching Frequency: 300KHz
Constant Charging Voltage Set By the External Resistor Divider
Charging Current is programmed with a sense resistor
Automatic Conditioning of Deeply Discharged Batteries
Battery Temperature Monitoring
2 Status Indications
Soft Start
Battery Overvoltage Protection
Operating Ambient Temperature -40to 85
Application
The Charger Powered by Photovotaic cell
Electric Tools
Battery-Backup Systems
Standalone Battery Chargers
Note 1: Patent Pending
VER 1.2 1




ACE Technology

ACE4722 Datasheet Preview

ACE4722 Datasheet

Multi-Chemistry Battery Charger

No Preview Available !

ACE4722
5A, Multi-Chemistry Battery Charger IC With Photovoltaic Cell MPPT Function
Absolute Maximum Ratings
Parameter
Max Unit
Voltage from VCC, VG, DRV, CHRG, DONE to GND -0.3 ~ 30 V
Voltage from CSP, BAT to GND
-0.3 ~ 28 V
Voltage from COM3 to GND
6.5 V
Voltage from Other Pins to GND
Storage Temperature
-0.3 ~ VCOM3+0.3 μA
-65 ~ 150
Operating Ambient Temperature
-40 ~ 85
Lead Temperature (Soldering, 10 seconds)
300
Stresses beyond those listed under ‘Absolute Maximum Ratings’ may cause permanent damage to the device. These are stress
ratings only and functional operation of the device at these or any other conditions above those indicated in the operational
sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect
device reliability.
Packaging Type
TSSOP-16
TSSOP-16 Description
1 VG
2 PGND
Function
Internal Voltage Regulator. VG internally supplies power to gate driver,
connect a 100nF capacitor between VG pin and VCC pin.
Power Ground.
3 GND
Analog Ground.
Open-Drain Output. When the battery is being charged, this pin is pulled low
4 CHRG by an internal switch. Otherwise this pin is in high impedance state.
Open-Drain Output. When the charging is terminated, this pin is pulled low
5 DONE by an internal switch. Otherwise this pin is in high impedance state.
Battery Temperature Monitoring Input. Connect an NTC resistor from this pin
6 TEMP
to GND.
Photovoltaic Cell Maximum Power Point Tracking Pin. Connect this pin to
7 MPPT
the external resistor divider for maximum power point tracking. In maximum
VER 1.2 2


Part Number ACE4722
Description Multi-Chemistry Battery Charger
Maker ACE Technology
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