Active Power Factor Correction (PFC) Circuit With Resistor-Free Zero-Current Detection

作者：Roh Yong Seong^*; Moon Young Jin; Gong Jung Chul; Yoo Changsik

来源：IEEE Transactions on Power Electronics, 2011, 26(2): 630-637.

DOI：10.1109/TPEL.2010.2070080

• Critical conduction mode (CRM)
• discontinuous conduction mode (DCM)
• power-factor correction (PFC)
• zero-current detection (ZCD)

An active power-factor correction (PFC) circuit is presented that employs a newly proposed resistor-free zero-current detection (ZCD). While the conventional ZCD requires either a sensing resistor or auxiliary transformer, the proposed ZCD requires only one OFF-chip capacitor. The active PFC circuit with the proposed resistor-free ZCD has been implemented in a 0.35-mu m BCDMOS process and the power factor is improved up to 9% from the one employing the conventional ZCD. The proposed resistor-free ZCD scheme can be applied to any type of switch-mode dc-dc power converter.

• 出版日期2011-2