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LOW-COST DOUBLE LI-ION BATTERY CHARGER USING ST6255C/ST6265C MCU

3 CONCLUSION: A LOW-COST FLEXIBLE SOLUTION

Everything on the evaluation board has been designed to make it easy to adapt in any way

(other type of battery, new behaviour specifications, additional design constraints, etc.).

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The number of components needed for each slot (charging and feedback) is minimal, so

replacing them is inexpensive. Besides, the circuit has a simple and predictable behaviour.

This avoids costly and time-consuming trial-and-error procedures.

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The system has an inner self-adaptation capability thanks to its many closed loop

regulations (voltage, current, temperature). For example, no software change is needed if

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The software only occupies a fourth of the total MCU program memory. Port C is not used

at all; neither is the SPI (nor the EEPROM on the ST6265C). Subsequently, many

improvements and/or new features can still be added without changing the MCU.

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Analog inputs available on Port C can read the identification resistor included in the batteries

to determine their capacity and adapt the charging parameters accordingly.

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The EEPROM can be used for ADC calibration.