MP8048 4A Quad Channel Power Half-Bridge QFN40

MP8048 4A Quad Channel Power Half-Bridge QFN40

The MP8048 is a configurable dual channel full- bridge or quad channel half-bridge that can be configured as the output stage of a Class-D audio amplifier.

Key Specifications

Features

• 4A Peak Current Output
• Up to 600KHz Switching Frequency
• Protected Integrated Power 0.2Ω Switches
• 30ns Switch Dead Time
• All Switches Current Limited
• Internal Under Voltage Protection
• Internal Thermal Protection
• 3.4mA Operating Current
• Fault Output Flag
• Single Ended Output Power: 8W/Channel at 22V, 8Ω

Typical Application Circuit

Applications

• Class D Audio Drivers
• Motor Drivers "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc.

Design Notes

• The output LC filter corner should sit well below the modulation frequency but above the audio band; component tolerance shifts it more than the nominal value suggests.
• Switching residuals on the speaker leads are best handled at layout — keep the filter close to the amplifier pins.
• Power supply rejection is frequency dependent, so a clean rail still matters at the modulation harmonics.
• The exposed pad is the thermal path; solder it to a copper area sized for continuous output power, not for idle.

Common Questions