Monolithic Power Systems MP7748S

Description

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. It is fully integrated audio amplifier which dramatically reduces solution size by integrating the following:• 200mΩ power MOSFETs• Startup / Shutdown pop elimination• Short circuit protection circuits

The MP7748S is capable of delivering 30W per channel into 4Ω speaker in single-ended output structure, or delivering 60W into 8Ω speaker in bridge-tied-load output structure. MPS Class D Audio Amplifiers exhibit the high fidelity of a Class A/B amplifier at high efficiencies. The circuit is based on the MPS’ proprietary variable frequency topology that delivers excellent linearity, fast response time and operates on a single power supply.

MP7748S features programmable VDD shutdown voltage for each channel by controlling the UVP node voltage. The default VDD shutdown (rising threshold) voltage is 8.4V if the UVP pin is NC. The MP7748S is available in TSSOP28-Exposed Package.

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
• Integrated Power FETs
• Available in TSSOP28-Exposed Package

Typical applications

• Multimedia Computers
• Surround Sound DVD Systems
• Televisions
• Flat Panel Monitors
• Home Stereo Systems
• Portable Docking Stations

More information

• Datasheet
• IC product information