Electronics Projects, 400W Claas D Subwoofer Amplifier Circuit IRS2092 article
"audio amplifier circuits, audio control circuits, class d amplifier circuit, transistor amplifier, " tagged with
IRS2092 Subwoofer 400W Claas D Amplifier Circuit.The main part of this protection circuit is a transistor FET which is connected in the power supply branch amplifier integrated circuit IRS2092. When applying a positive voltage to the control electrode of the transistor, the ground power supply voltage and the comparator halts the modulation process. The transistor FET is switched on the circuit that brings together a number of protections. One of them is check the power supply, which detects whether the supply voltage is in the range of 68 to 100 volts. If this the condition is not met, the class d protection will react. Additional protection is temperature. Circuit controls the voltage on the thermistor, which is located on the heatsink of the power switching Mosfet. Last class d amplifier protection detects the amplified audio signal at the output of the amplifier and responds when congestion or limitation.
400W Claas D Schematic
As the switches in the power section of the amplifier working in class D it is possible to use several
different types of power transistors. From the point of view of manufacturing technology and physical nature the principle of operation offers us three basic types of transistors: bipolar, IGBT and MOSFET. Bipolar transistors are unlike MOSFET driven from the shock and the excitation of the transistor meeting the power demands for the proposed amplifier would be performance-demanding.
The proposal of the amplifier in class D After studying and evaluating the different types of modulation I have chosen because of the simplicity of the pulse-width modulation (PWM), which is for use for a subwoofer of its qualities quite sufficient. Distortion is when the frequencies of the bass bandwidth do not translate nearly as well as in the zone of the mids or treble. The design of the amplifier from discrete components would be very costly. The modulator requires the use of a precision generator of triangular signal, several high-quality operational amplifiers and logic gates. Due to the savings in finance it is better to use an integrated type of wiring, which reduces the cost to a quarter. I chose integrated circuit IRS2092 from the company International Rectifier. This circuit includes the modulator, driver half-bridge output stage and requires the use of only few external components. Furthermore, this integrated amplifier overcurrent protection and the function of removing pop when turning on and off.
Class D Subwoofer Pre-Amplifier Circuit
Subwoofer filter circuit is a device which is used for reproducing sound of low frequency. This is a frequency from the lower edge of the acoustic band up to the top of the dividing frequency, which is set in the range of 60Hz to 250Hz. Above this frequency no sound reproduce other speakers in the ozvučovacím system. In stereo systems, even the systems of multiple channels is subwoofer one joint while maintaining the qualities of the reproduction. It uses a phenomenon that a person is capable of wrong or even is not able to determine whence the sound of low frequencies comes. When using a common subwoofer can be a speaker for the other parts of the sound band rated for less power and therefore cheaper. Active Class D subwoofer filter circuit
Class D 400W Amp circuit pcb schematic all files alternative links: 400w-claas-d-amplifier-circuit-irs2092.rar alternative link2