MPX2003 Up to 140kHz All-in-One Flyback Controller SOIC

MPX2003 Up to 140kHz All-in-One Flyback Controller SOIC

The MPX2003 is an all-in-one flyback controller with an integrated primary driving circuit, secondary controller, synchronous rectification driver, and safety-compliant feedback.

Key Specifications

Features

• Isolation Voltage >3750VAC
• 100% Production HIPOT Compliance Testing
• UL1577 and IEC62368 Safety Approved, DIN VDE V 0884-17 in Process
• Integrated Multi-Mode: Discontinuous Conduction Mode (DCM), Quasi-Resonant (QR) Mode, and Continuous Conduction Mode (CCM)
• Flyback Controller, Secondary-Side Synchronous Rectifier (SR) Sensing/Driving Circuitry, and Safety-Compliant Feedback Link
• Integrated 650V Primary-Side Current Source and 150V Secondary-Side Current Source
• Less than 30mW in Standby Mode
• Improved SR Control for Reliable Operation and Higher Efficiency
• Available in TSOICW16-15 and SOICW-16 Packages

Typical Application Circuit

Applications

• High-Performance USB PD Adapters
• 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