TPA3255 is a high-performance Class-D power amplifier chip, which has Class-D efficiency and can bring true high-end sound quality circuits. The device features advanced integrated feedback design and a proprietary high-speed gate driver error correction function (PurePath ™ Ultra HD). This technology allows the device to maintain ultra-low distortion throughout the entire audio frequency band while exhibiting perfect sound quality. The device operates in AD mode. When THD is 10%, it can drive up to two 315W / 4R loads and two 150W (unclipped power) / 8R loads, and has a 2 VRMS analog input interface to support high-performance DAC (Eg TI’s PCM5242) seamless connection. In addition to excellent audio performance, the TPA3255 also has the advantages of high power efficiency and ultra-low power level idle loss (less than 2.5W). This can be achieved by 85mR MOSFET and optimized gate driver scheme. Compared with the traditional discrete implementation scheme, this scheme can significantly reduce idle loss.
This machine is developed and produced in accordance with standard products. All parts are original and genuine, with QC3003 Bluetooth 5.0 chip to achieve wireless music playback of various portable products. This machine is directly powered by 220V power supply, easy to use. The all-aluminum chassis is of fine workmanship, while ensuring good heat dissipation.
1. Use original TPA3255 chip
2.Built-in high-power HIFI dedicated high-efficiency switching power supply, straight plug 220V
3. The resistor uses high-precision chip resistors to ensure a good signal-to-noise ratio.
4. Adopt special inductance for audio to ensure clear and powerful sound.
The main technical parameters:
Working method: Class D
Quiescent current: 60mA
Work efficiency:.> 90%
315W / 4Ω, 10% distortion
185W / 8Ω, 10% distortion
260W / 4Ω, 1% distortion
150W / 8Ω, distortion 1%
Frequency response: 20Hz to 20KHz
Dynamic range:> 100 dB
Signal to noise ratio: (SNR)> 111dB
Machine size: 183 * 52 * 189MM
1. Power amplifier board using a current sound, noise?
Our power amplifier, most of them are the use of DC power supply. The board itself does not produce current noise and noise,
The main reasons are:
A: with the power supply filter is not good, the current sound is the power or audio input is not normal
B: The quality of the input signal is poor, the output of the device connected to the input link is not normal, and the noise is caused by improper audio input
C: The quality of the input cable is poor, the cable is not properly connected, the cable is damaged, and the wiring is vacant
D: input connected to other playback devices, some devices share the power supply to cause noise
2.No sound, no sound in one channel?
A speaker is bad, speaker cable barrier
B, poor input cable connection, wiring damage, input connected to play the device output is not normal
3 .volume open big breaking sound, broken sound?
A. Insufficient power supply, wiring to confirm the correct wiring, supply current is sufficient
B. Speaker itself poor performance or damage, speaker power is too small or too large
C. Left and right channel speaker (+) (-) output is independent. Can not connect to each other
4. subwoofer amplifier volume open large speaker broken sound?
1. The lack of power, the line to confirm the correct wiring, power supply current is sufficient
2. The speaker’s own power is too large or the audience, the speaker’s bass performance is poor. The structure of the speaker box, this
These are not normal will cause broken sound
5. The volume of power is not enough?
Power and power supply voltage, the amplitude of the audio signal, the size of the speaker impedance has a relationship, any one will be less than shadow
6. amplifier will burn it?
A: The positive and negative polarity of the power supply are reversed, the power supply voltage is too high, exceeding the working voltage of white paper
B: If the board requires the use of DC power supply is not directly connected to the AC adapter power supply (this need to add rectifier filter to DC, it can be accessed)
C to confirm the wiring is correct, connected to the power supply, wiring errors, short circuits, will cause damage to the key parts!