MP175L 600mA Offline Regulator SOIC

MP175L 600mA Offline Regulator SOIC

The MP175L is a primary-side regulator that provides accurate constant-voltage (CV) regulation without an optocoupler.

Key Specifications

Features

• Primary-Side Constant Voltage (CV) Control, Supporting Buck, Buck-Boost, Boost, and Flyback Topologies
• Integrated 700V/4.5Ω MOSFET
• Internal 700V High-Voltage Current Source
• <30mW No-Load Power Consumption
• Up to 9W Output Power (POUT)
• Maximum Continuous Conduction Mode (CCM) with an Output Current (IOUT) Up to 600mA
• Low VCC Operating Current
• Frequency Foldback
• Limited Maximum Frequency
• Peak-Current Compression

Typical Application Circuit

Applications

• Home Appliances, White Goods, and Consumer Electronics
• Industrial Controls

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