MP7751 5-26V 26V, 2x20W Stereo BTL Fix Frequency Class D Audio Amplifier TSSOP-28

MP7751 5-26V 26V, 2x20W Stereo BTL Fix Frequency Class D Audio Amplifier TSSOP-28

MP7751 is an analog input Class D Audio Amplifier which can drive stereo speakers in bridge-tied-load configuration.

Key Specifications

Features

• 5V to 26V Operation from a Single Supply
• ±5A Peak Current Output
• Output Power: 9.5W/channel at 12V, 8Ω Load, 10%THD 15W/Channel at 16V, 8Ω Load, 10%THD 20W/Channel at 18V, 8Ω Load, 10%THD
• 92% Efficiency with 8Ω Load, 10%THD, 1kHz, 12V Supply Voltage
• 240mΩ power MOSFETs
• Startup / Shutdown pop elimination
• Short circuit protection circuits
• Advanced EMI performance
• All Switches Current limited
• Internal Under Voltage Protection

Typical Application Circuit

Applications

• DVD Receiver
• Active Speaker

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