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Amplifier Ics

Monolithic Power Systems

  • Audio amplifier / Class D / switching frequency

MP1720

Article: 00005682

Audio amplifier / Class D / switching frequency

The MP1720 is a high efficiency Class-D audio amplifier. It utilizes a full bridge output structure capable of delivering 2.7W into 4omg speaker. This device exhibits the high fidelity of a class AB amplifier with an efficiency of 90% which dramatically reduces solution size by integrating the following: 250m? power MOSFETs (VIN =3.3V) Startup / Shutdown pop elimination Over Current /Thermal overload Protection The MP1720 features a pin-selectable 1MHz or 1.3MHz frequency control or can be synchronized to an external clock source. The flexible switching frequency and internal EMI-reduction scheme eliminates the need for an output LC filter and passes emission standards without filter & with considerable cable. The MP1720 has six fixed gain options. MP1720-0: 0dB; MP1720-3: 3dB; MP1720-6: 6dB; MP1720-9: 9dB; MP1720-12: 12dB; MP1720-216: 21.6dB. The MP1720 is available in 10-pin MSOP-EP and 10-pin QFN packages.
Features

Passes FCC-Radiated Emissions Standards with 24" of Cable without Output Filter
2.7W Into 4? with 5V VIN @ 10% THD+N
Up to 90% Efficiency
Flexible Switching Frequency Setting
Low Noise (53?V Typical) with 3.3V VIN
15ms Start-Up Time Eliminates Pop
Low Quiescent Current (4mA @3.3V)
Low Shutdown Current (0.1?A)
Full Bridge Output Drive
Fully Differential Input
Over Current Protection
Thermal Shutdown

Specifications

  • Type: audio
  • Technology: Class D
  • Other characteristics: switching frequency

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