The PAM8403 is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high quality sound reproduction. The new filter less architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus to save the system cost. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of class-AB cousins. It can extend the battery life, ideal for portable applications.

Features

• 3W Output at 10% THD with a 4Ω Load and 5V Power Supply
• Filterless, Low Quiescent Current and Low EMI
• Low THD+N
• Superior Low Noise
• Efficiency up to 90%
• Short Circuit Protection
• Thermal Shutdown

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• CA-6928 Bluetooth Stereo Audio Module For Power Amplifier Board 3.5V~5V
• Input Voltage : DC 5 V
• Audio Out : L R G (it must be connected to amplifier)
• Receive audio signals from mobile
• Extraordinary Range 10 meters.
• Smallest and Powerful
• Best for any kind of amplifier.
• Dimensions : 24mm x 15mm x 1mm
• Supply: 3.5~5V Dc
• Current; 300ma
• Impedence; 4~8ohms

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• Supply voltage: DC 7V-15V
• Output power: 10w + 10w (8 load)
• Efficiency: 90%
• Shutdown Current: 4uA
• Quiescent current; 20mA
• SNR: 86%
• Total harmonic distortion: 5W / 1KHz / 8 —- 0.1%
• Frequency range: 20Hz-20KHz
• Input impedance: 15K
• Output Impedance: 4-8
• Amplifier board size: 29mm ` 25mm
• Provides best Speaker Sound
• Color: Black

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Specifications:

• Operating voltage: 2.5V-5.5V
• Speaker With:4-8ohms recommended:4 ohms
• Speaker Power :2-8W
• Size:21 x 18 x 3.4mm(L x W x H)
• Color:As the pics show
• Net weight:1g

Application:
LCD TVs, monitors,
Laptop
Portable Speakers
Portable DVD players, game consoles
Phone / speakerphone

Product Information
PAM8403 Amplifier is a small digital amplifier chip, high-definition sound quality highlights the advantages of digital chips, circuit using the most reasonable peripheral configuration, power supply filtering is upgraded to 470uf (some sellers are less did not even 100uf capacitance) 1.6mm glass sheet, the real amplifier board did the most detailed, high-fidelity sound output 3W + 3W, is a rare good product enthusiasts amplifier, potentiometer using original anti-meter body, potentiometer with switch can cut off the power supply directly counterclockwise.

Feature
Power range: DC 2.5V – 5.5V Minimum Output: 3W * 2 Dimensions: 29.5 * 20.2 * 15mm

Note
please make sure the power supply is not more than 5.5V and please don’t do reverse polarity for “+” and “-“, or else, it will burn the board.

Excellent noise suppression, in the absence of circumstances connected to input audio ear close to the speaker can not hear any noise, two-channel stereo, 5V power supply can output 3W 3W power, can directly drive 4Ω, 8Ω small speakers, the output power large, full of energy, good sound quality. The unique non-LC filter Class-D digital power board can be directly used computer USB power supply. Double panel wiring, wiring properly resolve the ground potential caused by balance and inter-channel crosstalk, ultra-miniature design, can easily be placed in a variety of digital products within a small space, high amplification efficiency. All using the whole plate welding machine, welding quality comparable non-manual soldering iron!

! ! Note: The left and right channel output of the “negative” and can not be connected together, otherwise it will burn IC, and should be preceded powered speakers connected (load).

Rated working voltage 2.5 ~ 5V, limit operating voltage 5.5V.

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