MP44011 Boundary-Mode PFC Controller SOIC

MP44011 Boundary-Mode PFC Controller SOIC

The MP44011 is a boundary-conduction–mode PFC controller with an internal-harmonic– injection function.

Key Specifications

Features

• Boundary-Conduction–Mode PFC Controller for Pre-Regulation
• Reduced Bus Capacitance
• Reduced Transformer Size
• Internal Harmonic-Injection Function
• Precise Adjustable-Output Over-Voltage Protection
• Ultra-Low Start-Up Current
• Very Low Quiescent Current
• On-Chip Filter for Current-Sense Pin
• Disable Function
• Available in SOIC-8

Typical Application Circuit

Applications

• LED Lighting Driver

Design Notes

• The PFC inductor must support the maximum duty cycle at the lowest line voltage, which is where saturation risk peaks.
• High-voltage startup and X-capacitor discharge paths dominate no-load standby loss; verify them against the efficiency target.
• Leakage inductance and the RCD clamp set the turn-off loss — snubber values are a thermal trade-off, not a fixed recipe.
• Synchronous rectification timing must track the primary switching; a mistimed SR FET conducts through its body diode and fails hot.

Common Questions