MP44010 Boundary Mode PFC Controller SOIC

MP44010 Boundary Mode PFC Controller SOIC

The MP44010 is a boundary conduction mode PFC controller which can provide 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 (0.46mA) Quiescent Current
• On-chip Filter on Current Sense Pin
• Disable Function
• -800/+1150mA Peak Gate Drive Current
• Available in SOIC-8 Package

Typical Application Circuit

Applications

• Offline Adaptor
• Electronic Ballast
• 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