Showing posts with label Amplifier High-Performance. Show all posts
Showing posts with label Amplifier High-Performance. Show all posts


5000W High Power Amplifier Circuit



Transistor subwoofer circuit diagram 300W

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Subwoofer Amplifier 100W

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General Description

The TDA7293 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications, such as home stereo, self powered loudspeakers and Topclass TV. Thanks to the wide voltage range and to the high output current capability it is able to supply the highest power into both 4-Ω and 8-Ω loads.The built-in muting function with turn-on delay simplifies the remote operation avoiding on-off switching noises. Parallel mode is possible by connecting several devices and using pin11. High output power can be delivered to very low impedance loads, so   optimizing the thermal dissipation of the system.


  • Multipower BCD technology
  • Very high operating voltage range (±50 V)
  • DMOS power stage
  • High output power (100 W into 8 Ω 
  • THD =10%, with VS = ±40 V)
  • Muting and stand-by functions
  • No switch on/off noise
  • Very low distortion
  • Very low noise
  • Short-circuit protected (with no input signal applied)
  • Thermal shutdown
  • Clip detector
  • Modularity (several devices can easily be connected in parallel to drive very low impedances)
Circuit diagram


LM3886 Audio Power Amplifier High-Performance 68W Audio Power Amplifier

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The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz. The performance of the LM3886, utilizing its Self Peak In-stantaneous Temperature (˚Ke) (SPiKe™) protection cir-cuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Op-erating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0µV. Itexhibits extremely low THD+N values of 0.03% at the rated
output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.