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TDA2030 2.1 amplifier board subwoofer circuit diagram. This circuit is typical of systems sold for 2.1 PC surround systems, left and right channel and subwoofer. Just plugging in the stereo audio and adjust the volume.
Audio amplifier circuit using integrated TDA2030 and op amp Ne5532, has two stereo amplifiers left and right satellite and Bass amplifier using TDA2030 in bridge for more power. The filter is made by double operational amplifier Ne5532. Complete assembly with the suggestion of the printed circuit board and has a power supply coupled to the circuit.
This circuit is a remake of another already posted on the Blog, but with some changes, uses two TDA IC’s to bridge to the subwoofer amp, with a new board design with some improvements. The idea is that to achieve maximum 18 Watts satellites and the outputs 32 watts in Subwoofer … This power with a maximum of + -18 Volts Speakers and 4 Ω. The circuit has adjustable volume for the stereo and subwoofer. Use pots of good quality to make this work.
By making the assembly check all connections and all components are correctly positioned, and the orientation of the PCB, be mounted inverted not seen it work, the components have to be positioned as illustrated above. When mounting, make sure that the pin 7812 is different from 7912. Use a good heat sink to the TDA IC’s.
The power supply is already fixed in the PCB and only add the transformer, to be with center tap on the secondary and primary according to the network (110/220). The capacitors can be supply of the 4.700μF at 10.000μF, the resistors are in parallel to discharge these capacitors Great. Always use good quality components in its assembly.
The appropriate transformer to the circuit, according to my withdrawal, must be at least 3 A transformer or to the 60VA 12-0-12 Volts.
Schematic TDA2030 2.1 amplifier board subwoofer circuit diagram
Suggested Printed Circuit Board PCB TDA2030 2.1 amplifier board subwoofer circuit diagram
BOM for assembling the power amplifier with Subwoofer using TDA2030 and Ne5532
|Resistor 1/4W 5%|
|R1, R11, R22,||470 – Yellow, violet, brown, gold|
|R2, R7||22k/1W – Red, Red, Orange, Gold,|
|R3, R12, R23,||33k – Orange, Orange, Orange, Gold|
|R4, R18||4.7k – Yellow, Violet, Red, Gold|
|R5, R13, R14, R16, R17, R21, R26||22K – Red, Red, Orange, Gold|
|R6, R15, R19, R20, R29||10 – Brown, Black, Black, Gold|
|R8, R9||10k – Brown, Black, Orange, Gold|
|R10, R24||680 – Blue, green, brown, gold|
|R25, R27, R28||100k – Brown, Black, Yellow, Gold|
|C1, C7, C11, C12, C18, C21, C25, C26, C29, C31, C37, C38, C44||10µF/25V — Electrolytic capacitor|
|C2, C32, C33, C34, C35, C36, C40, C43, C45||4.700µF a 10.000µF/25V — Electrolytic capacitor|
|C3, C8, C13, C15, C19, C28||100n (104) — Ceramic Capacitor|
|C4, C9||100µF/25V — Electrolytic capacitor|
|C5, C13, C15, C22, C23, C24||100n (104) — polyester capacitor|
|C6, C16, C27||2n2 (222) — polyester capacitor|
|C10, C17||1uF (105) — polyester capacitor|
|C14, C20||22µF/25V — Electrolytic capacitor|
|C41, C42||220p — Ceramic Capacitor|
|B1||KBU8B – Rectifier bridge – 8A 200V or equivalent.|
|IC3||7812T – Positive Voltage Regulator +12 V Any prefix (LM, NS, KA, etc.).|
|IC1||7912T – Negative voltage regulator -12V. Any prefix (LM, NS, KA, etc.).|
|IC2, IC4, IC5, IC7||TDA2030 or TDA2030A, or LM1875|
|IC6||NE5532 or equivalent – Dual Integrated Circuit Operational Amplifier|
|LED1||Led 5 mm any color|
|AC||Terminal block 3 pin 5.08 mm for the transformer|
|L-IN||Terminal block 2 pins 5.08 mm — Left channel audio input|
|L-OUT||Terminal block 2 pin 5.08 mm – Left channel audio output|
|R-IN||Terminal block 2 pin 5.08 mm – Audio input right channel|
|R-OUT||Terminal block 2 pin 5.08 mm – Audio output right channel|
|SUB||Terminal block 2 pin 5.08 mm – Subwoofer audio output|
|P1||50k – 47K or 50k – Dual logarithmic potentiometer, Master Volume Adjustment|
|P2||50k – 47K or 50k – Single pot – Adjust the volume of the subwoofer.|
|Solder, 12 +12 / 4 A transformers, Wires, Amplifier box, PCB, heatsink for the TDA ICs, etc.|
The capacitors must have a minimum working voltage of 25V for the electrolytic ones and 50V for the others.
Download the files for this assembly – PCB in PDF, component side plate in PDF, component mask (silk screen), schematic in PDF, Datasheet TDA2030A and NE5532.
Last update: 09/25/2022 20:05
- Download PDF data sheet for TDA2030 and TDA2030A
- Download LM1875 PDF data sheet
- Download NE5532 PDF datasheet
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