600 watt audio amplifier (LM4702)
The LM4702 is a high-performance audio power amplifier that integrates several features suitable for both consumer and professional audio applications. Its design allows for significant flexibility in terms of output power and supply voltage, making it adaptable for various setups, including AV receivers and high-fidelity audio systems.
The amplifier can deliver a maximum output power of 300 watts at an 8-ohm load, which is substantial for driving speakers in both home and professional environments. The absolute maximum power supply voltage is rated at ±38V to ±40V, while the recommended operating voltage range is ±30V to ±35V. This flexibility in power supply voltage allows for scaling the output power by adjusting either the supply voltage or the number of output devices used in the configuration.
One of the critical features of the LM4702 is its thermal shutdown circuitry. This safety mechanism is crucial in preventing damage to the amplifier by shutting down the system when the internal die temperature exceeds 150°C. This feature ensures reliability and longevity in high-demand applications where heat generation can be significant.
Additionally, the circuit includes a mute function that can be activated to silence the input drive signal, placing the amplifier in a quiescent state. This is particularly useful in scenarios where the amplifier needs to be temporarily disabled without completely powering down the system, such as during transitions between audio tracks or when switching between input sources.
In summary, the LM4702 audio power amplifier circuit is a robust solution for high-fidelity applications, offering significant power output, thermal protection, and operational flexibility, making it suitable for a wide range of audio amplification needs.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.
POWER : Maximum Output power @ 8ohms : 300watt Absolute max power supply voltage :±38V to ±40V Recommended power supply voltage :±30V to ±35V 🔗 External reference
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