Patent ID: 6621257
Filing Date: 2003-09-16
Classification: H02M

Abstract:
A DC-DC converter comprising:a power switching element; a smoothing circuit; an error amplification circuit provided to an output of the smoothing circuit; a &Dgr;&Sgr; modulator connected to an output of the smoothing circuit having the error amplification circuit therebetween so as to perform &Dgr;&Sgr; modulation to an analog signal or multi-bit digital signal; an integrator provided in the &Dgr;&Sgr; modulator; a gate driver circuit which passes the modulated signal; a current control circuit connected to the integrator; wherein, output signal of the integrator passes the current control circuit; output signal result of the current control circuit and a composite pulse signal of the output signal of the &Dgr;&Sgr; modulator are supplied to the power switching element; output voltage of the power switching element passes the smoothing circuit so as to become converter output voltage.