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TDA2050A + TDA2030A + NE5532 2.1 Subwoofer Audio Amplifier Board
Description:
The latest version TDA2050A + TDA2030A + NE5532 three-channel (2.1) subwoofer amplifier board finished board gun， the output power: left and right channel 18W + 18W， subwoofer 32W， fully compatible with LM1875. Decoder board 12V power supply has power output and decoder board audio inputs (the actual wiring board decoding audio input connected to GND can not reduce interference).
Buy 3 Get this board potentiometer plastic screw cap， quality is very good， the color random hair.
The following is a wiring diagram of the board， in strict accordance with the wiring diagram， in particular the power not to pick the wrong part， in order to avoid failure.
The Board Overview
Strong powerful bass， clear treble is not harsh. Use new original chips: Default woofer is a TDA2050-- peak output of 32W， two-channel unit for the two TDA2030-- peak output of 18W + 18W. Between TDA2030， TDA2050， LM1875 can be completely interchangeable， if all replaced TDA2050 or LM1875， please change larger radiator. Amplifier chip has five pins: positive power supply， negative power， positive input， reverse input and output. Heat sink on the chip and the negative is connected， energized work chip heat sink and ground， do not short-circuit， otherwise burn out immediately. The figure is a schematic diagram of the board wiring， carefully control wiring.
The main parameters
Left and right channels: TDA2030Ax2， peak power: 18Wx2， recommended to use 2.5-4 inch， full-range speakers 4-8 10-30W Europe.
Bass output: TDA2050Ax1， peak power: 32W， recommended 5-8 inches， 4-8 Euro 30-50W woofer.
Power Supply: AC double AC9-15V transformer recommended more than double AC12V 30W power transformer.
Output Power: DC12V1.5A， decoder board for 12V power supply.
PCB Materials: FR-4 fiberglass board thickness: 1.6mm.
PCB dimensions: 135x60mm.
Radiator Specifications: 100x33x37mm (L x W x H).
Center distance between the potentiometer axis: 25mm， shaft diameter: 6MM.
PCB mounting hole spacing: 128mm (length) x38mm (width).
Net weight: 230g.
Select Components: All components new rectifier filter using two large 3300UF / 25V electrolytic capacitors， give the entire circuit to provide sufficient low ripple DC power， large dynamic output sound still acting freely， please do not superstition filter capacitor bigger the better， sometimes too much but just the opposite， or space， a lot of this knowledge online， Baidu will know. Lowpass preamplifier circuit used original Texas NE5532 dual op amp， audio coupling capacitor capacitance selection of original Phi-lips CBB， powerful elastic bass. SEP large selection of original rectifier circuit 6A rectifier bridge， ensure that there is sufficient current output， maximize the efficiency of the power amplifier chip. After stage amplifier: Subwoofer part of an original TDA2050A amplification， output power up to 32W， DJ playing very shocking; left and right channel output amplification using two TDA2030A do， output power up to 18W + 18W， such power with a very reasonable， It can be transferred to the best high school bass， to meet the different needs of the sense of hearing.
PCB substrate selection: The selection board selected PCB substrate hardness super good FR-4 all-fiberglass board thickness of 1.6mm， belongs to a class of plates.
Design of the circuit: This circuit strong anti-noise ratio is high， at close to the speaker almost hear static noise. To avoid interference， the alignment with curved manner， signal cables land line surrounded by a large current， a small current， the signal traces strictly separated， and finally a single point ground， where the large current line bold， to ensure smooth current through . Regardless of the cost will add between each level of power supply decoupling capacitors to eliminate noise interference effectively suppress ripple.