Also, in some cases, where tone control is needed, the tone control circuitry is added before Power Amplifier.This is the circuit diagram of 2000W class AB power amplifier uses 7 pairs MJ15003 and MJ15004 transistors for the final amplification block. Generally, before Power Amplifier, the signal is corrected using Pre Amplifiers and Voltage controls amplifiers. Com This is.As you can see in the above block diagram, Power Amplifier is the last stage which is directly connected to the load. 4558 ic Audio Power Amplifier Circuit Diagram circuitspedia. The following is a schematic of a tunable FM antenna booster or FM antenna. TOP204 15V Switching Power Supply Circuit TEA2025B Amplifier Circuit UAA180 12 Led Vu Meter VUMeter 10 Led Schematic Mosfet Power Inverter 13,8 Volt 20A Power Supply 5 To 9 Volts Inverter Schematic LM317 1.5-30 Volt Adjustable Power Supply LA47536 High Power Car Audio Amplifier TB2901HQ Car Audio Amplifier Circuit LM4811 Dual 105mW Headphone.

The major load for a power Amplifier is the Loud Speaker. Power Supply for Audio Amplifier Simple Dual 6V Power Supply If you need to have a low ripple voltage.In case of Audio Amplifier system, the load and the load driving capacity of the amplifier is an important aspect in construction. The transistors must be mounted on heatsink to prevent the overheating, maintain the transistors work in maximum performance.Dual power supply circuit diagram with explanation.

The diameter is the effect created by the ohmic resistance and reactance. Now, if the pipe became bigger in diameter, the water will easily flow through the pipe, the volume of water will be bigger, and if we decrease the diameter, the less water will flow through the pipe, so the volume of water will be lower. Just think loudspeaker as a water pipe, the water flowing through the pipe is the alternating audio signal. Speaker impedance can be best understood using the relation between water flow inside a Pipe. Power amplifier delivers AC output, due to this the impedance of the speaker is a critical factor for proper power transfer.Impedance is the effective resistance of an electronic circuit or component for alternating current, which arises from the combined effects related to ohmic resistance and reactance.In Audio electronics, different types of Loudspeakers are available in different wattage with different impedance.

Both are a TO-220AB package.Those two MOSFETs create push-pull operation to drive 8 Ohms 50 Watt RMS speaker.To construct the circuit we need following components- We will drive 8 ohms Load with it.We used two widely popular complementary MOSFETs IRF530N and IRF9530N which are widely available in local shops as well as online stores.In the above image, the left one is the IRF530N and the right one is IRF9530N. The output will be quite stable and the THD will be minimum. In previous tutorials, we used dedicated power amplifier IC, TDA2040 for 25 Watt and for 40 Watt amplifiers, but in this design, we will use complimentary pair N and P channel MOSFETs to get the 50Watt power output. But in this tutorial, we will design a 50 Watt RMS output power amplifier using MOSFETs. Also, we need to understand that, a amplifier with 5 Watt, 6 Watt or 10 Watt or even more is the RMS (Root Mean Square) wattage, delivered by the amplifier to a specific load in continuous operation.So, we need to be careful about the speaker rating, amplifier rating, speaker efficiency, and impedance.In previous tutorials, we made 10 Watt power amplifier, 25 Watt power amplifier and 40 Watt power amplifier.

The resistors R1 and R2 have two operations, first it is a part of low pass filter, second, it is a voltage divider as well as a current limiter.On the second stage of the circuit, Q1, and Q2, which are BC556 transistors, work as a differential amplifier.Next, the Power amplification is done across two MOSFETs, IRF530N and IRF9530. This low pass filter is created using the R1, R2, and C1. At the beginning of the amplification, a low pass filter blocks high-frequency noise. Resistors (10R, 300R, 560R, 680R, 820R, 1.2k, 2.2k, 10k, 15k) вЂ“ 1nos.The schematic for this 50 watt Audio Amplifier has a few stages. 35V Rail to Rail power supply with +35V GND -35V power track output Fine Aluminum heat sink with 2mm thickness and 50 mm x 30mm dimension.

R15 is a high wattage resistor which acts as clamping circuit with the capacitor 68nF and 1uH inductor is added for providing stable amplification to the 8 Ohms Loudspeaker.We used Proteus simulation tools to check the output of the circuit we measured the output in the virtual oscilloscope. These two transistors provide enough gate drive to the MOSFETs. To drive these two MOSFETs, Q3 and Q4, BC546 is used. These two MOSFETs are acting as a push-pull driver (A widely used amplification topology or architecture). This is an important part of the circuit. Two MOSFET has the same specification, but one is N-Channel and another one is P-channel.

Be careful about the traces thickness. Keep the audio signal lines separated from noisy power lines. Make the traces of differential amplifier short, and as close as possible to the input trace. It is always a good choice to use PCB for Audio related application.

Add Fuse across the output, it will protect the circuit on speaker overdrive or output short circuit condition. Use toroidal Inductor instead of Air core with.

Power Amplifier Circuits Schematics