The power of LM1875 is larger than that of TDA2030 and TDA2009, and the voltage range is 16 ～ 60V. The undistorted power is 20W (THD = 0.08%), when THD = 1%, the power can reach 40W (the human ear has no obvious feeling of distortion below THD <10%), and the protection function is perfect. The author is a good choice.
The connection method is similar to TDA2030, there are two connection methods for single and double power supply.
1. Single power connection diagram:
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