Today, the most popular medium and high power audio amplifiers employ a Class-D working scheme due to high efficiency and excellent linearity. Compared to traditional analog amplifiers, Class-D uses high frequency pulse width modulation, similar to a switch mode power supply. Even though Class-D amplifiers incorporate negative feedback on supply voltage, the reality is that the output impedance of the power supply has an impact on audio quality.
What are the audio amplifier requirements for wireless / AI speaker? How TAS5825M improve battery lifetime and audio quality?
This section provides the overview of TAS5825M innovation features.
Compared with traditional PWM modulation, TAS5825M develops innovative Hybrid modulation, which dynamically maintains differential switching with several common duty options.
The benefits of Hybrid PWM modulation mainly includes:
- Higher efficiency for longer battery lifetime
- Good THD+N performance
- Ultra-low idle power dissipation and idle noise
This training section descripts some innovation features of TAS5825M, which includes:
- Real-time thermal foldback: maintain max safe output power for uninterrupted listening experience
- 122MHz DSP resource: 192kHz high definition audio processing or Smart Amp algorithm for better speaker protection
- Inductor less: state-of-the-art EMI reduction technology
As the entrance of search engine, the explosive growth in wireless speaker or AI speaker is driving the new requirements of audio amplifier - higher efficiency and better audio quality.
Facing these new challenges, TAS5825M (closed loop classD with 38W stereo output) develops a lot of advanced features compared with traditional audio amplifier, which includes:
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This training series outlines key measurements for audio products, specifically signal-to-noise ratio, crosstalk and gain, intermodulation distortion, frequency response and phase, THD+N and level. These videos explain the basic principles of each measurement, why it is significant and how to test and calculate correctly.