MPX2001 All-in-One Flyback Controller SOIC

MPX2001 All-in-One Flyback Controller SOIC

Key Specifications

Features

• Isolation Voltage >4500Vrms
• UL1577 and IEC 62368 Safety Approved
• 100% Production HIPOT Test at 4500Vrms/50Hz
• 650V Integrated HV Current Source
• 200V Integrated SR Controller, Supporting both DCM and CCM Operation
• Incorporates Primary Driving Circuit, Secondary Controller, and Synchronous Rectification Driver
• Extremely Low Operating Current in Standby Mode
• Frequency Modulation and Peak Current Mode Control with Slope Compensation, Line Compensation, and Leading Edge Blanking
• Adjustable Cable Drop Compensation
• OVP, POCP, Real Secondary-Sense Output OLP, Internal/External B/O and B/I, SCP, Current-Sensing Short Protection, Internal Thermal Shutdown, UVLO, and Ext.P

Typical Application Circuit

Applications

• AC/DC Adapters
• Power Supply for Appliances
• Offline Battery Chargers

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