PAM8403 mini type D digital power amplifier can be easily put in small space of many digital products, high amplification efficiency.
It can be power by computer USB 5V,or phone charger 5V,or lithium battery.
High efficiency 90%,can provide 3W (left channel)+3W (right channel) when using 4Ω load and 5V power supply.
Type D power amplifier has very high amplification efficiency sound quality will not be effect by temperature rise ,no need of heat sink.
Build-in noise reduction circuit ,no noise when power on/off, supports short circuit, over current and over temperature protection.
Widely used for LCD TVs, monitors, laptops, speakers, DVD players, game players, phones.
Specifications:
Working Voltage: 2.5V-5.5V DC (should no over 5.5V,pay attention to polarity)
Suitable Speaker: 4-8Ω (4Ω is recommended); speaker power 2-8W
Size: 2.3*1.8cm/0.9*0.7in

Mini Amplifier 5V PAM8403 All Features

1. Model: PAM8403
2. Operating voltage: 2.5V-5.5V
3. Speaker Load: 4-8 Ohms
4. High Efficiency: 90%
5. Size: 21 x 18 x 3.4 mm (L x W x H)
6. Net weight:1g

Application :

• Bluetooth Stereo Audio hands-free/headsets
• In robots that speak or generate sounds to indicate activities
• Portable Speakers
• LCD Monitors / TV Projectors
• Arduino or Raspberry Pi Game Machines
• Speaker Phones
•  Dimension:1.85*2.15cm
  2. Work Voltage:2.5V-5V, Limit Voltage: 5.5V
  3. Excellent noise suppression
  4. Large output power, good sound quality
  5. Double channel stereo, 5V power supply and can output 3W+3W power, and can directly drive 4 ohm & 8 ohm speakers en.wikipedia.org
  6. Class D digital power board without LC filter, could be powered by computer USB
  7. Dual panel wiring, wiring properly solve the crosstalk cause by ground potential balance and inter channel
  8. Miniature design, can be easily place into a variety of digital products
  Note:
  The left and right channel output of the “negative” can not be connect in parallel, otherwise it will burn out IC, and before electrification should be first connect the speaker (load).