2x20W Stereo Single Ended Class D Audio Amplifier

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Not Recommended for New Designs. Refer to MP7748S for New Designs

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:
• 250m? power MOSFETs
• Startup / Shutdown pop elimination
• Short circuit protection circuits

The MP7748 is capable of delivering 20W per channel into 4? speaker in single-ended output structure, or delivering 50W into 6? 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.

Symmetry Electronics is an authorized Monolithic Power Systems distributor.


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Output Power at 24V VDD and 10% THD+N
Stereo SE configuration: 20W per channel into 4? load
Mono BTL configuration: 50W into 6? load
THD+N = 0.02% at 1W, 8?(SE)
Low Noise (103V with SE configuration, 140V 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


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Monolithic Power Systems Datasheet

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