SPECIFICATIONS

Specifications:
Product Name: TPA3255 Class D Audio Amplifier
Output power: 315W * 2 (4ohms 10% THD)
Supply voltage DC18-DC53.5V
Audio input: XH2.54mm 3PIN connector
Output channel 2-channel stereo
Product size 130x78mm

Note:
1) This circuit board has overload and other protection functions inside.
Rough operations (such as plugging and unplugging output terminals with power on, excessive input signals, connecting speakers with power on, etc.) can cause the internal protection circuit of the chip to start and cut off the output of the power amplifier board. At this point, the power amplifier board appears to be silent on one or two channels. And it will not automatically recover with the termination of violent operations. In this situation, it is necessary to cut off the power supply of the amplifier board, let it stand for a period of time (several seconds to tens of seconds), and then turn it back on to restore normal operation. Rough handling may also result in permanent damage to the chip

This amplifier board is suitable for use with power transformers with a power of up to 600VA and an output voltage between AC dual 20V and dual 33V (three wires per output).
It can also be paired with a lower power transformer, which will limit the output power of the power amplifier board.
It can also be paired with a transformer with a single power output (two wires per output), with an output voltage range of 20-33V AC.
At this point, it is necessary to additionally cooperate with a bridge rectifier filter circuit to convert it into DC voltage and supply power to the power amplifier board.
We can also use solutions other than transformer rectification and filtering to power this amplifier board. As long as the DC voltage meets the working conditions of the power amplifier board, the power amplifier board can also work normally. However, from the perspective of sound quality, it is more recommended to adopt the transformer full wave rectification scheme.