MP7748S 9.5-36V x 30W Stereo Single Ended Or 60W Mono BTL Class D Audio Amplifier TSSOP28

MP7748S 9.5-36V x 30W Stereo Single Ended Or 60W Mono BTL Class D Audio Amplifier TSSOP28

The MP7748S is a Class D Audio Amplifier for driving stereo speakers in single-ended configuration or a mono speaker in bridge-tied- load configuration.

Key Specifications

Features

• 9.5V to 36V Operation from a Single Supply
• ±5.5A Peak Current Output
• Output Power at 30V and 10%THD: - Stereo Single Ended: 2 x 30W into 4Ω Load, - Bridge Tied Load: 60W into 8Ω Load
• THD+N = 0.02% at 1W, 8Ω
• > 90% Efficiency at 10%THD
• Low Noise (160μV with SE configuration, 145μV with BTL configuration)
• Switching Frequency Up to 1MHz
• Integrated Startup and Shutdown Pop Elimination Circuit
• Programmable UVP
• Thermal and Short Circuit Protection

Typical Application Circuit

Applications

• Portable Docking Stations
• Surround Sound DVD Systems
• Televisions
• Flat Panel Monitors
• 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