Bảng Mạch Khuếch Đại Âm Thanh Kỹ Thuật Số Mini Xs9871 2.5v Sang 5.5v 5w

Giới thiệu Bảng Mạch Khuếch Đại Âm Thanh Kỹ Thuật Số Mini Xs9871 2.5v Sang 5.5v 5w

product description
1, the working voltage: DC2.5-5.5V
2, the operating current: 1A above
3, the output power: 3-5W
4, load range: Impedance 2Ω-8Ω
We recommend matching speakers 3W 4R

Interface definition
VCC: DC2.5-5.5V (recommended 5V)
G: ground power / audio ground (common)
IN: Audio input
OUT: Speaker
OUT: Speaker -
(4Ω-8Ω) speaker recommended 3W4R

Precautions
1, Strictly wiring diagram Wiring
2, the power supply must not be reversed, reverse burn IC
3, use 2.5V-5.5V DC power supply, AC power is not available to or higher than 5.5V and 5V DC is recommended
4, supply current above 1A

common problem
First, there is noise amplifier board?
1, caused by poor supply filtering AC ripple can substantially increase the filter capacitor can solve the problem
2, lead-out noise source itself, lossless format recommended audition
3, a signal line or poor quality are not dedicated drain wire
4, the signal line be lifted or suspended, if it is the bottom line input floating noise will be great
5, attached to the metal shell in the board can play a shielding effect of interference can be avoided to a large extent
6, a common power supply interference. When installed wiring unreasonable

Second, the small amplifier board sound?
1, horn player received no cabinet bare acoustic short circuit will feel a small voice, if there is no box temporarily, simple test method is: find a cardboard box, glued together with liquid quit four weeks to be a box, just to dig a large holes can hold horn, trumpet outward play, the better
2, power horn, with the effectiveness of the impedance mismatch, the seat speaker rated power amplifier output power greater than or equal to the impedance of Europe generally selected from 4-8, the speaker diaphragm material, diameter is also important, to specific conditions please

Third, the distortion amplifier board?
Distortion phenomenon is generated and output signals proportional to the amplitude change, phase relationship and waveform morphology, a distortion audio amplifier distortion power and two types of the body. Electrical distortion caused by the power, sound distortion caused by distortion of the electric damper further class: harmonic distortion, intermodulation distortion, transient distortion. Acoustic distortion is primarily the exchange interface to the distortion, according to the nature divided, nonlinear distortion and linear distortion, beginners often overlooked is the "distortion power" selected power supply voltage, power is too low, it will open loud distortion. As a peak power amplifier output is 15w, the recommended operating voltage is 12V, so that the power amplifier output power should be greater than about 1.5 times the peak power of about 22w, i.e. power = current / voltage = 22/12 = about 1.8A. Input level rises that will cause saturation distortion. Application: Bluetooth speakers, open the damper, rod speakers, video machines, and so on ...



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