MP7770 9.5-36V x 45W Stereo Single-Ended or 90W Mono BTL Class-D Audio Amplifier TSSOP28

MP7770 9.5-36V x 45W Stereo Single-Ended or 90W Mono BTL Class-D Audio Amplifier TSSOP28

MP7770 is an analog class-D audio amplifier that can drive either stereo speakers in single- ended configuration or a mono speaker in a bridge-tied-load configuration.

Key Specifications

Features

• 9.5V-to-36V Operation from a Single Supply
• ±8.5A Peak Current Output
• Output Power at 36V and 10%THD: - Stereo Single-Ended: 2 x 45W into 4Ω Load, - Bridge-Tied Load: 90W into 8Ω Load
• THD+N = 0.03% at 1W, 8Ω
• > 90% Efficiency at 10%THD
• Low Noise
• Switching Frequency of up to 1MHz
• Integrated Startup and Shutdown Pop Elimination Circuit
• Programmable UVP
• Thermal and Short-Circuit Protection

Typical Application Circuit

Applications

• DVD Receiver
• Mini Combo System
• Home Theater Systems
• Surround Sound Systems

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