25PCS Lot Low Voltage Stereo Audio System NS8002 Class AB Mono DIY Amplifier Circuit DC 3V Mono Amplifier

Parameter introduction:   PCB
Installation method: inline, SMT patch
Output power: mono 3W
Supply voltage: 2V-5V (3.7V lithium battery can be used)
Output impedance: 4 ohms – 8 ohms
Frequency response: 150HZ-20KHZ
Efficiency: 90%
Silent control: yes
Volume adjustment: none

Size: length 16 × width 10.5 × thickness 2.6mm (including protruding part)

Wiring instructions
This board should be grounded, and the 3 pin is the negative pole of the power supply and the ground.
1 pin is a silent output, it should be connected with 3 feet, when the voltage is 0.

Features

Improved PSRR at 217Hz & 1KHz 60dB
Power output at 5.0V, 10% THD+N, 4 Ohm 2.0 W (typ.)
Power output at 5.0V, 1% THD+N, 8Ohm 1.5 W (typ.)
2.2V – 5.5V operation
Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions
No output coupling capacitors, snubber networks or bootstrap capacitors required
Unity-gain stable
External gain configuration capability

Applications
Portable computers
Desktop computers
Low voltage audio systems