Monolithic Power Systems MP7748

Description

The MP7748 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:• 250mΩ power MOSFETs• Start-up/shut-down pop elimination• Short circuit protection circuits

The MP7748 is capable of delivering 20W per channel into 4Ω speaker in single-ended output structure, or delivering 50W into 6Ω speaker in bridge-tied-load output structure under 24V VDD. 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.

MP7748 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.

Features

• Output Power at 24V VDD and 10% THD+N
• Stereo SE configuration: 20W per channel into 4Ω load
• Mono BTL configuration: 50W into 6Ω load
• THD+N = 0.02% at 1W, 8Ω(SE)
• Low Noise (103μV with SE configuration,140μV with BTL configuration)
• Switching Frequency Up to 1MHz
• 9.5V to 36V Operation from a Single Supply
• Integrated Startup and Shutdown Pop Elimination Circuit
• Programmable UVP
• Thermal and Short Circuit Protection
• Integrated Power FETs
• Available in TSSOP28-Exposed Package

Typical applications

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

More information

• Datasheet
• IC product information