MP7745 9.5-26V 2 x 20W Class D Stereo Single Ended Audio Amplifer TSSOP20

MP7745 9.5-26V 2 x 20W Class D Stereo Single Ended Audio Amplifer TSSOP20

Key Specifications

Features

• 2 x 20W Output at VDD = 24V into 4Ω load
• THD+N = 0.05% at 1W, 8Ω
• 93% Efficiency at 20W, 4Ω & VDD = 24V
• Low Noise (103µV Typical)
• Switching Frequency Up to 1MHz
• 9.5V to 26V Operation from a Single Supply
• Integrated Startup and Shutdown Pop Elimination Circuit
• Thermal and Short Circuit Protection
• Integrated Power FETs
• Pin Compatible with MP7722 and MP7742

Typical Application Circuit

Applications

• Flat Panel TV
• Portable Docking Stations
• Surround Sound DVD Systems
• Televisions
• Multimedia Computers

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