FAN9672

Two-Channel Interleaved CCM PFC Controller FAN9672 Description The FAN9672 is an interleaved two−channel Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller IC intended for PFC pre−regulators. Incorporating circuits for leading edge, average current, and “boost”−type power factor correction; the FAN9672 enables the design of a power supply that fully complies with the IEC1000−3−2 specification. Interleaved operation provides substantial reduction in the input and output ripple currents and the conducted EMI filtering becomes simpler and cost effective. An innovative channel−management function allows slave channels to be loaded and unloaded smoothly in lower power−level conditions according to setting voltage on the CM pin, improving the PFC converter’s load transient response. The FAN9672 also incorporates a variety of protection functions, including: peak current limiting, input voltage brownout protection, and TriFault Detect function. Features Continuous Conduction Mode Control Two−Channel PFC Control (Maximum) Average Current−Mode Control PFC Slave Channel Management Function Programmable Operation Frequency Range: 18 kHz ∼ 40 kHz or 55 kHz ∼ 75 kHz Programmable PFC Output Voltage Dual Current Limit Functions TriFault Detect Protects Against Feedback Loop Failure Sag Protection Programmable Soft−Start Under−Voltage Lockout (UVLO) Differential Current Sensing Available in 32−Pin LQFP Package Typical Applications High Power...