矽力杰产品规格书SY5072B.pdf

Application Note : SY5072B Single-Phase Transition-Mode PFC Controller General Description Features The SY5072B is a constant voltage Transition-Mode  Valley Turn-on to Achieve Low Switching Losses boost controller with Power Factor Correction (PFC)  Frequency Reduce in Light Load function. Constant ON Time control is applied to  Internal High Current MOSFET Driver: 70mA achieve high PF and low THD without multiplier. It Sourcing and 400mA Sinking drives the Boost converter in the Quasi-Resonant mode  MOSFET Over-Current Protection(OCP) for high efficiency and better EMI performance. It  Internal THD Optimization to Achieve Low THD adopts special design to achieve quick start up and  Internal Transition Optimization reliable protection for safety requirement.  Compact Package: SOT23-6 Ordering Information Applications SY5072□(□□□)  AC Adapter Front End Package Code  LED Drivers and Luminaries Optional Spec Code Ordering Number Package type Note SY5072BABT SOT23-6 Typical Applications DP DB LB Input