PAM8404KGR

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Audio amplifiers are essential components of most audio systems. For better sound quality, high efficiency and low distortion are always the main consideration. PAM8404KGR is an isolated audio amplifier designed for high fidelity audio amplifier applications, like car audio and home audio systems. PAM8404KGR can enable selectable dual levels of gain and ensure stable sound. In this way, it enables an audio system to have optimum sound quality and volume.

PAM8404KGR is a three-legged, low power output amplifier with a maximum output power of 2W, dedicated to drive 8Ω / 4Ω loudspeakers directly. It contains 8V to 18V power supply and 0V to 4V analog input. This special amplifier can provide appropriate gains of either 6dB or 11dB, meeting the specific requirements of different applications, like preamplifier, headphone amplifier and bridge amplifier. In addition, it adopts high performance, very low distortion, and low noise for transmitting audio signals, thus offering cleaner and more reliable sound output.

Working Principle:

The power supply for the PAM8404KGR module is regulated to a stable voltage. This amplifier, built on Bridge Tied Load (BTL) design, is capable of dual level gain selection, 6dB or 11dB. With one 1.0K resistor and one 2.2K resistor, users can further adjust the gains. During this adjustment, output volume control circuits are made available, operating in the range of 0dB to 14dB.

The two BTL amplifiers are operated in double-ended mode. If they work under half-supply voltage, these two amplifiers can realize a half-bridge drive of load. The two sets of outputs are connected to an output load, like 8Ω and 4Ω speakers. These two outputs will track two different DC conditions but the same AC signal. Place a capacitor between the output terminal and ground to ensure the output is phase-corrected.

The presence of AC signals at the output thus indicates the successful operation of the PAM8404KGR module. PAM8404KGR is currently supplied in a 4-pin 8-pin dual inline package (PDIP). The 4-pin consists of two sets of power supplies and two sets of input connections. The 8-pin package provides two sets of outputs for connecting speakers directly. In this way, the whole system becomes more schematic and interconnected.

Conclusion:

PAM8404KGR is a low power output audio amplifier dedicated to directly drive 8Ω / 4Ω speakers. It adopts a very low distortion and low noise architecture and has selectable dual levels of gain as well as output volume control circuits, making it suitable for use in preamplifier, headphone amplifier and bridge amplifier. The 4-pin and 8-pin packages of PAM8404KGR make it easy to interconnect the whole system. Therefore, it is a great selection for those who need a reliable and high-fidelity audio amplifier for their applications.

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