Charge pump device

摘要

A charge pump device includes a charge pump circuit, for generating an output voltage according to a driving signal, a comparing circuit, for generating a comparison result according to the output voltage and a reference voltage, a detecting circuit, for detecting a frequency range of a ripple of the output voltage according to the comparison result and generating a detection result, and a driving stage, for generating the driving signal according to the comparison result, and adjusting a driving capability corresponding to the driving signal according to the detection result.

主权项

1. A charge pump device, comprising:
a charge pump circuit, for generating an output voltage according to a driving signal; a comparing circuit, for generating a comparison result according to the output voltage and a reference voltage; a detecting circuit, for detecting a frequency range of a ripple of the output voltage according to the comparison result by measuring a pulse interval of the comparison result and generating a detection result; a driving stage, for generating the driving signal according to the comparison result, and adjusting a driving capability corresponding to the driving signal according to the detection result; and a control circuit, coupled between the comparing circuit and the driving stage, and coupled to the detecting circuit, for adjusting the driving capability corresponding to the driving signal according to the comparison result and the detection result.