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MP7747 9.5-36V Class D Mono Single Ended Audio Amplifier QFN3
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pMPS MP7747 — Class D Mono Single Ended Audio Amplifier, 9.5-36V input, QFN3./p
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MP7747 9.5-36V Class D Mono Single Ended Audio Amplifier QFN3
The MPS MP7747 is a Class D Mono Single Ended Audio Amplifier. It operates from a 9.5 V to 36 V input. It is supplied in a QFN3 package.
Key Specifications
| Part Number | MP7747 |
| Function | Class D Mono Single Ended Audio Amplifier |
| Input Voltage | 9.5 V to 36 V |
| Output Power | 20 W |
| Peak Efficiency | 91% |
| Package | QFN3 |
| Ordering Codes | MP7747 |
Features
- 20W Output at VDD = 24V into a 4Ω load
- THD+N = 0.02% at 1W, 8Ω
- 91% Efficiency at 20W & VDD=24V
- Low Noise (103µV Typical)
- 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
Typical Application Circuit
Applications
- Portable Docking Stations
- Surround Sound DVD Systems
- Televisions
- Flat Panel Monitors
- Multimedia Computers
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
What input voltage does the MP7747 support?
9.5 V to 36 V.
Which package and ordering codes apply to the MP7747?
QFN3; order codes include MP7747.
What are the defining features of the MP7747?
20W Output at VDD = 24V into a 4Ω load THD+N = 0.02% at 1W, 8Ω
Shenzhen Gaorunxin Technology Co., Ltd
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