Importance

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Abstract

A charging control circuit (23, 33, 43, 53), a charging apparatus (2) comprising the charging control circuit (23, 33, 43, 53), a charging control method and a charging method comprising steps in the charging control method. The charging control circuit (23, 33, 43, 53) and the charging control method can provide a variable current reference (Iref_g), and limit the variable current reference (Iref_g) to a minimum current value in a periodically triggered interrupt duration, so as to enable an output voltage (Vout) to be closer to a battery core voltage (V0) when the interrupt duration ends. Therefore, by taking whether the output voltage (Vout) obtained when the interrupt duration ends approximately reaches a calibration voltage reference (Vref_s) as a condition, the charging is triggered to terminate, so that the defect of insufficient charging can be overcome, and instantaneous uprush of the output current (Iout) can be further limited by use of the variable current reference (Iref_g) in the charging duration. Moreover, the charging control circuit (23, 33, 43, 53) and the charging control method can further provide a variable voltage reference (Vref_g), and allow the output voltage (Vout) to exceed the calibration voltage reference (Vref_s) in the charging duration by improving the variable voltage reference (Vref_g) after it is detected that the output voltage (Vout) is far from reaching the calibration voltage reference (Vref_s) when the interrupt duration ends, thereby improving the charging speed.

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First Claim