2x3W 미니 디지털 오디오 앰프 모듈
(2x3W Mini Digital Audio Amplifier Board)
개요
- 본 제품은 2x3W 미니 디지털 오디오 앰프 모듈입니다.
- 2x3W 스테레오 오디오 앰프로 5V 시스템과 사용이 가능합니다.
특징
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Size: 2.3 square
Fully symmetrical totem design, balance and fine profit without any omission!
A lot of comparisons have been done, and both the design and the sound quality are the best in their class.
"Advantages" High-efficiency digital power amplifier chip, internal special output processing circuit, cancel the traditional LC network, lower EMI value than using LC! Get the maximum power output at a lower voltage, super power saving, built-in standby electronic switch, built-in high-gain buffer amplifier, built-in short-circuit protection. "Power Supply": 3.6 to 5.5V, a single-cell lithium battery or USB power supply is suitable, and four 1.2V batteries can also be used for power supply. A 5V voltage regulator circuit must be added for power supply with a transformer, and the chip will burn out if it exceeds 5.5V.Power supply: direct current (DC): 3.6v-5.5V
Output power: 3W+3W (4 ohms)
Signal to noise ratio: 90dB
Efficiency: >90%
Maximum closed loop gain 24DBPrecautions:
1: The positive and negative poles of the power supply cannot be reversed, and the power supply voltage cannot exceed 5.5V. As long as one of these conditions occurs, the IC will be burned immediately
2: There is a high-gain buffer on-chip, and any component parameters on the board cannot be changed. Inconsistent parameters will cause damage to the IC.
3: Please try to use a shielded wire for the input wire, which can play a role in anti-interference and eliminate clutter current sound.
4: The output is cmos tube BTL drive mode. The negative poles of the left and right speakers cannot be connected together, that is, the 4 wires connected to the speakers are completely independent and are not allowed to be connected together!
If you want to use it on a computer, there will be a current sound when power is supplied directly from the computer's USB interface. (It is mainly caused by the common ground of the sound source and the USB. Regardless of the problem of the power amplifier board, the famous brand USB small speakers will also be like this, and it is unavoidable.
