Title :
Active Power Factor Correction (PFC) Circuit With Resistor-Free Zero-Current Detection
Author :
Roh, Yong-Seong ; Moon, Young-Jin ; Gong, Jung-Chul ; Yoo, Changsik
Author_Institution :
Integrated Circuits Lab., Hanyang Univ., Seoul, South Korea
Abstract :
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-μm 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.
Keywords :
BIMOS integrated circuits; DC-DC power convertors; power factor correction; switched mode power supplies; BCDMOS process; active power factor correction; auxiliary transformer; off chip capacitor; resistor free zero current detection; sensing resistor; size 0.35 mum; switch mode dc-dc power converter; Critical conduction mode (CRM); discontinuous conduction mode (DCM); power-factor correction (PFC); zero-current detection (ZCD);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2010.2070080
