Amplifier with TDA2030, Lm1875, TDA2050, TDA2040 power amplifier stereo or Bridge, dynamic, you can use several cis and configure to work in bridge (mono) or stereo.

Circuit based on the tda2030, tda2050, tda2040 and LM1875t PDF datasheet, including optimized printed circuit board to avoid noise. The power supply will be from a symmetrical, simply using a double transformer with voltage according to the power to be used to power the amplifier.

The board can be used in 2-channel or bridged mono mode. To use in bridge, add resistor R3(BTL) of 22K to the circuit. Output to bridged mode will turn the speaker on OUTR1 and OUTL2. Audio input will be in INR. INL will not be connected at all.

Maximum voltage x maximum power table for each IC

LM1875 – The LM1875 is a monolithic power amplifier offering extremely low distortion and high-quality performance for consumer audio applications. The LM1875 delivers 20 watts into a 4 or 8 load on ±25V supplies. Using an 8 load and ±30V supplies, over 30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown.
TDA2030, TDA2030A – The TDA2030A is a monolithic IC in a Pentawatt package intended for use as a low-frequency class-AB amplifier. With VS max= 44 V it is particularly suited for more reliable applications without regulated supply and for 35 W driver circuits using low-cost complementary pairs.
The TDA2030A provides high output current and has exceptionally low harmonic and crossover distortion. The device incorporates a short-circuit protection system comprising an arrangement for automatically limiting the dissipated power to keep the operating point of the output transistors within their safe operating range. A conventional thermal shutdown system is also included.
TDA2040 – The TDA2040 is a monolithic integrated circuit in the Pentawatt package, intended for use as an audio class-AB amplifier. Typically, it provides 25 W output power into 4 Ω with THD = 0.5% at VS= 34 V. The TDA2040 provides high output current and has extremely low harmonic and crossover distortion. Furthermore, the device incorporates a patented short-circuit protection system comprising an arrangement for automatically limiting the dissipated power to keep the operating point of the output transistors within their safe operating range. A thermal shutdown system is also included.
TDA2050 – The TDA 2050 is a monolithic integrated circuit in a Pentawatt package, intended for use as an audio class-AB audio amplifier. Thanks to its high power capability the TDA2050 is able to provide up to 35 W true RMS power into a 4 ohm load at THD = 0%, VS = ±18 V, f = 1 kHz and up to 32 W into an 8 ohm load at THD = 10%, VS = ±22 V, f = 1 kHz.
Moreover, the TDA2050 delivers typically 50 W music power into a 4 ohm load over 1 sec at VS = 22.5 V, f = 1 kHz.
The high power and extremely low harmonic and crossover distortion (THD = 0.05% typ, at VS = ±22 V, PO= 0.1 to 15 W, RL= 8 ohm, f = 100 Hz to 15 kHz) make the device most suitable for both hi-fi and high-end TV sets.

Dynamic power amplifier schematic with ci tda2030

Suggested printed circuit board to assemble the amplifier

Part List to assemble the amplifier

Lista de material para montar o amplificador

Electrolytic capacitors – 25V to transformer 12+12 ou 15+15, 35V for transformer 18+18V.
Ceramic capacitor – 50,63 ou 100V.

Download image files of the PCB in PDF, PNG, and Gerber for assembly of the amplifier

Download        Mirror

Download the semiconductor PDF datasheet used in the project

• Datasheet em PDF TDA2030
• Datasheet em PDF TDA2030a
• Datasheet em PDF TDA2050, TDA2050V
• Datasheet em PDF TDA2040
• Datasheet em PDF LM1875, LM1875t, LM1875l
• Datasheet em PDF ponte retificadora KBL406