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A Class D amplifier's high efficiency makes it ideal for portable and compact high-power applications. Traditional Class D amplifiers require an external lowpass filter to extract the audio signal from the pulse-width-modulated (PWM) output waveform.
Class D amplifiers precisely solve this problem by functioning with a different method than traditional classes A, B, AB or C amplifiers. In the first section, the simplified architecture of a class D amplifiers along with its general functioning are presented.
29 Αυγ 2018 · Learn how to build your own Class D power amplifier—one of the most efficient ways to listen to music.
• Output power: 4 W × 22 W at 4 Ω, 1% THD+N, 14.4 V • Input range 5.6 V to 18 V (operational during cold, crank, start, and stop events) • 50-V load dump and over temperature protection
Using class D techniques, amplifiers capable of delivering several hundred watts to the load can be designed using small, inexpensive, stamped heat sinks. Efficiency of class D amplifiers opens the possibility for powerful, small, light amplifiers with good sound quality to be designed today.
18 Ιουν 2008 · The power supply voltage is one of the primary factors in determining how much power an amplifier can deliver to the load. The voltage required for an amplifier depends on several factors, including: the amplifier's output power requirements. the load (speaker) impedance.
Chapter 1. Getting Familiar with Class D Audio Amplifier. Chapter 2. Latest Class D Audio Amplifier Technology Trend. Chapter 3. Identifying Problems ~ Performance Measurement of Class D Amplifier. Chapter 4. Reducing Distortion ~Dead-time ~ LPF Designs. Chapter 5. Reducing Noise ~ Isolation Technique ~ PCB Design. APPENDIX.
