D7240 is a dual audio power amplifier circuit, which can be used for stereo power amplification or BTL amplifier circuit to expand output power. The circuit features: large output power, low distortion, low noise, and working power supply voltage range. Wide, VCC can work normally between 9~18V. At the same time, it has thermal cutoff, surge pulse, load short circuit, over voltage protection circuit, etc. In addition, the circuit also sets the audio squelch circuit and 
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