Catalog
Compact Power Factor Correction Controller
Key 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 Start-Up and Operating Current
• Improved Regulation Block Dynamic Behavior
• Synchronization Capability
• Internally Trimmed Reference Current Source
• Overvoltage Protection: Output Overvoltage Detection
• Undervoltage Protection: Protection Against Open Loop
• Effective Zero Current Detection
• Accurate and Adjustable Maximum On-Time Limitation
• Overcurrent Protection
• ESD Protection on Each Pin
Description
AI
The MC33260 is a controller for Power Factor Correction preconverters meeting international standard requirements in electronic ballast and off-linepower 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.
