The MC33260 is a controller for Power Factor Correction preconverters meeting international standard requirements in electronic ballast and off−line power conversion applications. Designed to drive a free frequency discontinuous mode, it can also be synchronized and in any case, it features very effective protections that ensure a safe and reliable operation. This circuit is also optimized to offer extremely compact and cost effective PFC solutions. While it requires a minimum number of external components, the MC33260 can control the follower boost operation that is an innovative mode allowing a drastic size reduction of both the inductor and the power switch. Ultimately, the solution system cost is significantly lowered. Also able to function in a traditional way (constant output voltage regulation level), any intermediary solutions can be easily
implemented. This flexibility makes it ideal to optimally cope with a wide range of applications.

General Features
•Standard Constant Output Voltage or “Follower Boost” Mode
•Switch Mode Operation: Voltage Mode
•Latching PWM for Cycle−by−Cycle On−Time Control
•Constant On−Time Operation That Saves the Use of an Extra Multiplier
•Totem Pole Output Gate Drive
•Undervoltage Lockout with Hysteresis
•Low Startup and Operating Current
•Improved Regulation Block Dynamic Behavior
•Synchronization Capability
•Internally Trimmed Reference Current Source
•Pb−Free Packages are Available