MP161B 30V Power Solution SOIC

MP161B 30V Power Solution SOIC

The MP161 integrates a 700V switching regulator, a low-dropout linear regulator, and two channel relay drivers.

Key Specifications

Features

• 700V Switching Regulator
• Integrated 700V MOSFET and Current Source
• Constant Voltage (CV) Regulation with Internal Loop Compensation
• Optimized Light-Load Efficiency by Frequency Modulation
• Standby Mode
• Anti-Audible Noise Operation by Peak Current Modulation
• Adjustable or Fixed 12V Output
• Low Operating Current
• Over-Temperature Protection (OTP), Short- Circuit Protection (SCP), Overload Protection (OLP), Over-Voltage Protection (OVP) and Brown-Out Protection (BOP) Low-Dropout Linear Regulator
• Up to 30V Input Voltage

Typical Application Circuit

Applications

• Home/Industrial Automation

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