Ultra-Miniature Digital Amplifier Board 2*3W Class D Pam8403 Amplifier Board USB Powered

 

 

(Description in Chinese and English for Details)

 

Description in Chinese:

 

 

Noise Suppression, When the Input Audio Is Not Connected, No Noise Can Be Heard When the Ear Is against the Speaker. Dual-Channel Stereo, 5V Power Supply Can Output 3W 3W Power, Can Directly Drive 4Ω, 8Ω Mini Speaker, High Output Power, Sufficient Energy and Good Sound Quality. The Class D Digital Power Board without LC Filtering Can Be Directly Powered by the USB of the Computer. Double-Sided Board Wiring, Properly Solve the Ground Potential Balance and Crosstalk between Sound Channels Caused by Wiring, Ultra-Miniature Design, Can Be Easily Placed in the Internal Small Space of Various Digital Products, Amplification Efficiency. All Machines Are Used for Whole Plate Welding, and the Welding Quality Is Not Comparable to Manual Soldering Iron Welding!

 

 

 

 

 

Product Introduction: Pam8403 Mini Class D Digital Amplifier Board

 

1. Working Voltage: 2. 5v-5.5v. Note: the Power Supply Voltage Should Not Exceed 5.5V, and the Positive and Negative Power Supply Should Not Be Reversed.
2. Speaker Matching: 4-8 Euros, Recommend: 4 Euros; Speaker Power: 2-8W.
3. Can Use Computer USB Port 5V Power Supply, Or Use Mobile Phone Charger USB Port 5V Power Supply, Or Use Lithium Battery Power Supply.
4. High Efficiency 90%, 4Ω Load and 5V Power Supply Conditions, Can Provide 3W (Left Channel) +3W (Right Channel) Output Power. The Efficiency of Class A and Class B Power Amplifier Is Only about 30%, and Class D Power Amplifier Is Highly Praised under the Current Green Trend.
5. Class D Power Amplifier Has High Efficiency, Which Will Not Affect the Sound Quality Due to Temperature Rise, and Does Not Need to Add Cooling Fin, Which Occupies a Small Volume.
6. Amplifier Board Built-in Noise Elimination Circuit, There Is No Noise When the Power Is Turned on/off; the Module Has Short Circuit over Current Protection and over Temperature Protection.
7. Board Size:★★★★Ultra-Fine Volume: 1.85 * 2.11cm★★★★

Application:
LCD TV, Monitor
Laptop
Portable Speaker
Portable Dvd Player, Game Console
Mobile Phone/Hands-Free Phone

Precautions for Use:
Turn on the Speaker First and Then Turn on the Power, Otherwise It Will Easily Cause Damage to the Chip;
Because the Digital Volume Control in the Module Has a Large Gain, Do Not Let the Audio Signal Input Be Too Large to Make the Signal Produce Cutting Limiting.

Tips: Dear Customer: Our Module Is Provided for Electronic Players with Certain Electronic Knowledge to Purchase! And Please Carefully Read the Instructions Or Product Introduction in the Product Description When Purchasing the Product. If We Do Not Understand the Product Problems Caused by the Use, Our Company Will Not Accept Them. Please Be Cautious When Purchasing the Product.

Customer Faq:
1. Can Mini Digital Amplifier Board 2*3W Class D Be Powered by Computer?
Answer: Amplifier Board Can Be Powered by Computers, but Noise May Occur (Some Customers Do Not Have Noise). It Is Recommended to Supply Power Independently.
2. Mini Digital Amplifier Board 2*3W Class D Is It Good to Use Our Speakers?
Answer: Our Speakers Only Provide DIY Players for Trial Play. the Sound Effect Is Not Particularly Good. If You Pursue High Sound Effect, You Can Purchase It Separately.
3. Mini Digital Amplifier Board 2*3W Class D Why Does the Speaker Have Noise after Power on?
Answer:
1. Howling Sound Should Be Introduced by Audio Input Wire. Shielded Wire Should Be Used for Audio Input Wire, and Audio Input Wire Should Not Be Suspended. Connect the Audio Source.
2. Another Reason May Be That the Power Supply Is Not Good and Some Switching Power Supply Has Great Interference.
3. Try to Lower the Sound, Or It May Be That the Input of the Audio Signal Is Too Large and the Signal Is Cut and Limited.

Noise Suppression, When the Input Audio Is Not Connected, No Noise Can Be Heard When the Ear Is against the Speaker. Dual-Channel Stereo, 5V Power Supply Can Output 3W 3W Power, Can Directly Drive 4Ω, 8Ω Mini Speaker, High Output Power, Sufficient Energy and Good Sound Quality. The Class D Digital Power Board without LC Filtering Can Be Directly Powered by the USB of the Computer. Double-Sided Board Wiring, Properly Solve the Ground Potential Balance and Crosstalk between Sound Channels Caused by Wiring, Ultra-Miniature Design, Can Be Easily Placed in the Internal Small Space of Various Digital Products, Amplification Efficiency. All Machines Are Used for Whole Plate Welding, and the Welding Quality Is Not Comparable to Manual Soldering Iron Welding!

 

Note: the "Negative" of the Left and Right Channel Outputs Cannot Be Connected Together in Parallel, Otherwise the IC Will Be Burned, and the Speaker (Load) Should Be Connected before Power-on.

 

 

 

 

 

Ultra-Small Size: 1.85 * 2.11cm Is about the Size of a Dime Coin

 

 

 

 

 

Please Note: the Output Terminal "Negative" of the Left and Right Channel Office Cannot Be Connected Together, Otherwise the Chip Will Be Burnt out, and the Speaker (Load) Should Be Connected before Power-on.

 

 

 

 

 

Rated Working Voltage 2.5-5V, Limited Working Voltage 5.5V

 

 

 

 

 

 

 

Description in English:

 

 

 

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!

 

 

• 
  

  Ultrafine size: 1.85*2.11cm

  
  
• 
  

  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.

  
  
• 
  

  Brand Name: PAM8403

  
  
• 
  

  Model Number: PAM8403 module

  
  
• 
  

  2 * 3W D Class: Efficient 2.5 ~ 5V

  
  
• 
  

   

  
  

 

 

 

 

Image Display: