MP7758 5-18V Inductorless Class-D Audio Amplifier TSSOP-28

MP7758 5-18V Inductorless Class-D Audio Amplifier TSSOP-28

The MP7758 is an inductorless, analog input class-D audio amplifier that drives stereo speakers in a bridge-tied load configuration.

Key Specifications

Features

• 5V to 18V Operation from a Single Supply
• ±5A Peak Current Output
• Output Power: o 9.5W/Channel at 12V, 8Ω Load, 10% THD o 15W/Channel at 16V, 8Ω Load, 10% THD
• 90% Efficiency with 8Ω Load, 10% THD, 1kHz, 12V Supply Voltage
• 240mΩ Power MOSFETs
• Start-Up/Shutdown Pop Elimination
• Short-Circuit Protection Circuits
• Inductorless Topology
• Advanced EMI Performance
• All Switches Current Limited

Typical Application Circuit

Applications

• Wireless/Portable Speakers
• DVD Receivers

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