Reduced switching noise Dc-Dc converter applied improve switch control modulation method

To generate the switch control signal of power converters, pulse width modulation (PWM) measure is widely used. But this method causes large switching noise peaks on the carrier frequency. When delta-sigma modulation technique is used for power converter, this problem does not occur. Still the same problem arises in the case of dc-dc converter. This paper proposes a dc-dc converter introduces improved delta-sigma modulation circuit, and examine the switching noise component.