Charge pump circuit with current detecting and method thereof

A charge pump circuit which electrically connects to a load circuit, adapted to produce a load current flowing through the load circuit, comprising:

• a charge pump circuit unit which produces the load current, in which the charge pump circuit unit includes a controlled current source for controlling an input current inputted to the charge pump circuit unit;
• a detecting circuit unit which electrically connects to the load circuit and produces a feedback signal based on the load current;
• and
• a feedback circuit unit which electrically connects to the detecting circuit unit and adjusts the input current of the controlled current source based on the feedback signal.

A charge pump circuit unit, comprising:

• a controlled current source;
• a dummy path which connects the controlled current source to ground;
• a capacitor which electrically connects to the controlled current source and the dummy path through a first switch, and the controlled current source charges the capacitor through the first switch;
• and
• a second switch which connects to the capacitor and a load circuit, and the capacitor is discharged through the second switch;
• wherein the first switch and the second switch are respectively switched based on a first switch signal and a second switch signal, the conductive periods of the first switch and the second switch are non-overlapped, and the current of the controlled current source flows toward ground through the dummy path when the first switch signal and the second switch signal are both cutoff.