Ultra-mini digital power amplifier board, 10 years of new high-efficiency digital power amplifier, get [3 x 2]6W power when inputting 5V, ultra-thin board, which can be easily placed in the gap of small plastic box or other equipment, such as MP3/ 4 or notebook external small speakers, etc., as you can imagine, the power supply is recommended to take USB 5V or with a single lithium battery.
"Advantages": 10 years of new high-efficiency digital power amplifier chip, internal special output processing circuit, canceled the traditional LC network, lower EMI value than LC! Maximum power output at lower voltage, super power saving, built-in standby electronic switch, built-in high gain buffer amplifier, built-in short circuit protection. "Power": 3.6 to 5.5V, single-cell lithium battery or USB power supply is suitable, can also be powered by four 1.2V battery, with a transformer power supply must be added 5V voltage regulator circuit, more than 5.5V chip will burn out.
parameter
Power: DC (DC): 3.6v-5.5V
Output power: 3W+3W (4 ohms)
Signal to noise ratio: 90dB
Efficiency: >90
Size: 24*15.5*mm Positioning hole size: Spacing 20mm Aperture: 2mm
Precautions
1. The positive and negative poles of the power supply cannot be reversed, and the power supply voltage cannot exceed 5.5V. These two violations will cause the IC to be damaged.
2. There is a high gain buffer on the chip. It is not possible to change any component parameters on the board. Non-conforming parameters will cause IC damage.
3. Please use the shielded wire as much as possible for the input line, which can play an anti-interference effect and eliminate the clutter current.
4. The output is the BTL driving mode of the cmos tube. The negative poles of the left and right speakers cannot be connected together, that is, the four lines connecting the speakers are completely independent, and are not allowed to be connected together!
