一种用于CRM Boost PFC变换器变导通时间控制的电路参数在线监测方法

This paper proposes an improved zero current detection for critical conduction mode (CRM) control, which can compensate the input current distortion caused by the signal propagation delay and the existence of the negative resonance current. A unified variable on-time calculation method is also proposed to unify the formulas under the zero-voltage-switching condition and the valley-switching condit...