Abstract: A control method for controlling a battery charging circuit having at least one switch, includes: generating a first difference signal based on the difference between a charging current feedback signal and a charging current reference signal; generating a bias reference signal by proportionally integrating the first difference signal when the battery voltage is higher than a first threshold and less than a second threshold; generating a bias signal by proportionally integrating the difference between the sum of the bias reference signal and a system voltage reference signal and a system voltage feedback signal; generating a comparison signal by comparing the sum of the system voltage feedback signal and a ramp signal with the sum of the bias signal and the system voltage reference signal; and generating a control signal for controlling the at least one switch based on the comparison signal and a constant time period control signal.

Abstract: A control method for controlling a battery charging circuit having at least one switch, includes: generating a first difference signal based on a charging current feedback signal and a charging current reference signal; generating a second difference signal based on a battery voltage feedback signal and a battery voltage reference signal; based on a battery voltage, selecting one of the first and second difference signals, and a ground voltage as a third difference signal; generating a bias signal by proportionally integrating the third difference signal; comparing the sum of a system voltage feedback signal and a ramp signal with the sum of the bias signal and a system voltage reference signal and generating a comparison signal; generating a control signal to control the at least one switch of based on the comparison signal and a constant time period control signal.

Abstract: A current threshold regulation method is used in a switching converter with a tank element and a transistor. The current threshold regulation method includes: detecting whether the input voltage is lower than an input under voltage threshold and generating an input under voltage indication signal; detecting whether the output voltage is lower than an output under voltage threshold and generating an output under voltage indication signal; generating a current threshold based on the input under voltage indication signal and output under voltage indication signal; comparing a current flowing though the tank element with the current threshold and generating a current comparison signal; and generating a control signal based on the current comparison signal to control the transistor.

Abstract: A control method for controlling a battery charging circuit having at least one switch, includes: generating a first difference signal based on the difference between a charging current feedback signal and a charging current reference signal; generating a bias reference signal by proportionally integrating the first difference signal when the battery voltage is higher than a first threshold and less than a second threshold; generating a bias signal by proportionally integrating the difference between the sum of the bias reference signal and a system voltage reference signal and a system voltage feedback signal; generating a comparison signal by comparing the sum of the system voltage feedback signal and a ramp signal with the sum of the bias signal and the system voltage reference signal; and generating a control signal for controlling the at least one switch based on the comparison signal and a constant time period control signal.

Abstract: A current threshold regulation method is used in a switching converter with a tank element and a transistor. The current threshold regulation method includes: detecting whether the input voltage is lower than an input under voltage threshold and generating an input under voltage indication signal; detecting whether the output voltage is lower than an output under voltage threshold and generating an output under voltage indication signal; generating a current threshold based on the input under voltage indication signal and output under voltage indication signal; comparing a current flowing though the tank element with the current threshold and generating a current comparison signal; and generating a control signal based on the current comparison signal to control the transistor.

Abstract: A control method for controlling a battery charging circuit having at least one switch, includes: generating a first difference signal based on a charging current feedback signal and a charging current reference signal; generating a second difference signal based on a battery voltage feedback signal and a battery voltage reference signal; based on a battery voltage, selecting one of the first and second difference signals, and a ground voltage as a third difference signal; generating a bias signal by proportionally integrating the third difference signal; comparing the sum of a system voltage feedback signal and a ramp signal with the sum of the bias signal and a system voltage reference signal and generating a comparison signal; generating a control signal to control the at least one switch of based on the comparison signal and a constant time period control signal.