ACE4703

Fully 5A, 3cell Standalone Li-ion Battery Charger

VER 1.2

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End-of-Charge Current Setting

End-of-charge current can be set by connecting a resistor from EOC pin to GND, and is decided by the

following equation:

6

Where:

otherwise the charging may not be terminated correctly.

When Rext=0Ω, the minimum I

When Rext=100KΩ, the maximum I

Automatic Battery Recharge

After the charge cycle is completed and both the battery and the input power supply (wall adapter) are

still Connected, a new charge cycle will begin if the battery voltage drops below 12V due to self-discharge

or external loading. This will keep the battery capacity at more than 80% at all times without manually

restarting the charge cycle.

Battery Temperature Monitoring

A negative temperature coefficient (NTC) thermistor located close to the battery pack can be used to

monitor battery temperature and will not allow charging unless the battery temperature is within an

acceptable range.

Connect a 10kΩ thermistor from the TEMP pin to ground. Internally, for hot

temperature, the low voltage threshold is set at 175mV which is equal to 50℃

(RNTC≈3.5kΩ). For cold

temperature, the high voltage threshold is set at 1.61V which is equal to 0℃

(RNTC≈32kΩ) with 50uA of

pull-up current.

Once the temperature is outside the window, the charge cycle will be suspended, and the charge cycle

resumes if the temperature is back to the acceptable range.