Reference Design for a Class D 2.1-Channel Audio Amplifier for an MP3 Docking Station
The MAX98400 Class D audio amplifier is designed for high-efficiency audio amplification, making it suitable for portable and powered audio applications. In this stereo audio docking station application, the amplifier is utilized to provide robust sound output through a combination of compact satellite speakers and a larger subwoofer, ensuring a well-rounded audio experience.
The system architecture typically includes the MAX98400 amplifier connected to a digital audio source, which can be a smartphone, tablet, or other audio devices. The amplifier's inputs can be configured to accept various audio signals, allowing for versatility in use.
The 2-inch satellite speakers are designed to handle mid to high frequencies, providing clarity and detail in the audio playback, while the 5-inch subwoofer is responsible for delivering low-frequency sounds, enhancing the overall sound quality and providing a richer listening experience.
The powered speaker dock incorporates a power supply circuit that ensures the MAX98400 and the speaker system receive adequate power for optimal performance. Additionally, feedback and protection circuitry may be integrated to prevent distortion and protect the amplifier and speakers from damage due to overcurrent or overheating.
Overall, this reference design showcases the capabilities of the MAX98400 amplifier in delivering high-quality audio output in a compact form factor, suitable for various consumer audio applications.This reference design demonstrates the MAX98400 Class D audio amplifier in a stereo audio docking station application. The demo box is a powered speaker dock that drives a speaker system consisting of 2in satellite speakers and a 5in subwoofer..
🔗 External reference
Related Circuits
Can be directly connected to CD players, tuners and tape recorders. Tested with several headphone models of different impedance: 32, 100, 245, 300, 600 & 2000 Ohms. Schematic shows left channel only. B1, SW1, J1 & C3 are common...
This design utilizes a well-established circuit topology for the power amplifier, employing a single-rail supply of approximately 60V and capacitor coupling for the speaker(s). The benefits for a guitar amplifier include simple circuitry, even with relatively high power outputs,...
The circuit illustrated in FIG PGA202 comprises an AC-coupled differential amplifier. The input stage of PGA202 includes two 1 µF capacitors and two 1 MΩ resistors, resulting in a cutoff frequency of approximately 0.16 Hz. The Qualcomm AC coupling...
The NE5532 preamplifier is widely recognized for its excellent performance. It is now being utilized as a small power amplifier. While the general operational amplifier (op-amp) circuit remains similar, there are notable changes in some resistors and capacitors, leading...
Capable of 2kW peak and a minimum of 1.5kW continuous, it has to be said that this amplifier will blow up any speaker connected to it. Regardless of the claimed power that various drivers can handle, they can't. To...
To achieve a 1000:1 sweep range, the voltage across the external resistors Ra and Rb must be reduced to nearly zero. This necessitates that the maximum voltage on control pin 8 surpasses the voltage at the top of Ra...