2x300W or 600W Power audio Amplifier

Description: The circuit is based around LM4702 manufactured by NATIONAL semiconductors and MJ11029-MJ11028 by ON semiconductors. It is a high fidelity audio power amplifier designed for demanding consumer and pro-audio applications. You can also use this circuit with AV receivers, audiophile power amps, pro audio high voltage industrial applications, etc. Amplifier output power may be scaled by changing the supply voltage and number of output devices. More: The circuit includes thermal shutdown circuitry that activates when the die temperature exceeds 150°C. The circuit’s mute function, when activated, mutes the input drive signal and forces the amplifier output to a quiescent state. Maximum output power @ 8 ohms: 300 watts. Absolute max power supply voltage: ±38V to ±40V. Recommended power supply voltage: ±30V to ±35V.

The LM4702 is a high-performance audio power amplifier integrated circuit designed for high fidelity applications. It operates with a complementary push-pull configuration, utilizing the MJ11029 and MJ11028 power transistors to provide robust output characteristics. The circuit is optimized for both consumer audio and professional applications, ensuring low distortion and high efficiency.

The amplifier is capable of delivering a maximum output power of 300 watts into an 8-ohm load, making it suitable for driving large speakers in both home audio and professional sound reinforcement systems. The output power can be adjusted by varying the supply voltage and the number of output devices, allowing for flexibility in design and application.

Thermal management is a critical aspect of the circuit design. The integrated thermal shutdown feature protects the amplifier from overheating by disabling the output when the die temperature exceeds 150°C. This ensures reliability and longevity, especially in high-demand scenarios where prolonged operation at high power levels is expected.

Additionally, the circuit includes a mute function, which can be activated to silence the input signal and place the amplifier in a quiescent state. This feature is particularly useful in scenarios where the amplifier must be temporarily disabled without disconnecting the power supply, such as during system startup or shutdown.

The recommended power supply voltage range of ±30V to ±35V provides optimal performance, while the absolute maximum supply voltage rating of ±38V to ±40V offers a margin for transient conditions. This allows the circuit to handle variations in power supply without compromising performance or damaging the components.

In summary, this high fidelity audio power amplifier circuit is well-suited for a variety of applications, including AV receivers and professional audio systems, with features that ensure high performance, reliability, and user control.The circuit is based around {LM4702}manufactured by NATIONAL semiconductors&{MJ11029-MJ11028} by ON semiconductors It is a high fidelity audio power amplifier. Designed for demanding consumer and pro-audio applications. You can also use this circuit with AV receivers, Audiophile power amps, Pro Audio High voltage industrial applications etc Amplifier output power maybe scaled by changing the supply voltage and number of output devices.

The circuit includes thermal shutdown circuitry that activates when the die temperature exceeds 150°c. CIRCUIT’s mute function, when activated, mutes the input drive signal and forces the amplifier output to a quiescent state.

Maximum Output power @ 8ohms : 300watt. Absolute max power supply voltage :±38V to ±40V. Recommended power supply voltage :±30V to ±35V.