| 摘要 |
A multiphase pulse width modulation controller having a phase difference adjustment function is provided to solve a heating problem generated in a switching element by performing a function of a switching frequency of a high frequency through a switching frequency of a low frequency of which phase difference is adjusted. A multiphase pulse width modulation controller having a phase difference adjustment function includes a carrier generator(210), a waveform detector(220), a phase difference adjustor(230), and a pulse width modulator(240). The carrier generator(210) generates a pulse width waveform which has a variable pulse width according to an amplitude of an input signal. The waveform detector(220) detects a change of the waveform of a plurality of carrier signals generated in the carrier generator(210). The phase difference adjustor(230) adjusts to generate a phase difference between the carrier signals based on the waveform change of the detected carrier signal. The pulse width modulator(240) generates a pulse width modulation waveform of which a pulse width is variable according to the amplitude of the input signal. |
