SMAKN High-Power 2-Channel 3W PAM8403 Audio Super Mini Digital Amplifier Board

Super mini digital amplifier board, ultra-thin , can be very convenient to place in the gap of small plastic boxes or other devices. It can obtain maximum power output at a lower voltage. Built-in standby electronic switch, high-gain buffer amplifier, short circuit protection. It is perfect for MP3/MP4/notebook.
Description:
New efficient digital amplifier chip
Special internal output processing circuit
Eliminating the conventional LC network
Using EMI
Power supply: (DC) 3.6v-5.5V
Output power: 3W +3 W (4 in Europe)
Signal-to-noise ratio: 90dB
Efficiency:> 90%
2 channels 3W amplifier with PAM8403.
Output is CMOS BTL driver
Cannot change any component parameters to protect IC
The board can also powered by 5V USB power supply or 4 x 1.5V batteries
It is perfect for MP3/MP4/notebook
Dimensions: 0.91 in x 0.63 in x 0.08 in (2.3 cm x 1.6 cm x 0.2 cm)
Positioning Holes size: Spacing 20mm
Aperture: 2mm
Material: Circuit board
Color: Red
Note:
Power positive and negative can not be reversed, the supply voltage can not exceed 5.5V, these two violations would have led IC damage. On-chip high-gain buffer can not be altered to to board any component parameters, does not meet the parameters will result in IC damage. Input line try to use shielded line, you can play an anti-jamming effect, eliminate clutter current sound.
Output for cmos tube BTL driver, the negative terminal of the left and right speakers can not be together, that the four lines connecting to the speaker is completely independent, and does not allow total access!
Package includes:
1 x Digital Amplifier Board