MP44014A Boundary Mode PFC Controller SOIC

MP44014A Boundary Mode PFC Controller SOIC

The MP44014-A is a boundary conduction mode PFC controller that provides simple and high-performance active power-factor correction using minimum external components.

Key Specifications

Features

• Boundary Conduction Mode PFC Controller for Pre-Regulator
• Zero-Crossing Compensation to Minimum THD of AC Input Current
• Precise Adjustable Output Over-Voltage Protection
• Ultra-Low (15μA) Start-Up Current
• Low Quiescent Current (0.46mA) at OVP Condition
• On-Chip Filter on Current Sense Pin
• Enable/Disable and Open-Loop Protection Function on FB
• -750/+800mA Peak Gate-Drive Current

Typical Application Circuit

Applications

• Offline Adaptors
• Electronic Ballasts
• LLC Front End

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