ホワイトノイズ乗算器を持つ新ΔΣ変調制御方式低スイッチングノイズ非絶縁降圧形DC-DC コンバータ

抄録

This paper deals with a high-frequency chopper type step-down (buck) DC/DC converter system, which is designed for operating on the basis of a new conceptual delta-sigma modulation scheme developed by the authors. The novel typedelta-sigma modulator which consists of the prototype delta-sigma modulator and white noise-based multiplier is demonstrated specifically for this DC/DC converter. Large switching noise peaks suppression characteristics are illustrated and discussed by the spectrum analysis of the switched voltage of the buck type DC/DC converter. The spectrum of the converter is compared with those of prototype delta-sigma modulator and triangle carrier-based PWM generator.
And the output voltage of the DC/DC converter treated here can be controlled in the same manner as conventional PWM method.