Power amplifier speaker protection photoelectric isolation (1696)

Detail Power amplifier speaker protection photoelectric isolation (1696)

Power amplifier speaker protection photoelectric isolation (1691)

*Beautifully made, the photoelectric isolation protection can share one power supply with two boards.
*The general discrete protection board needs 2 independent AC power to isolate the ground wire (most transformers do not have 2 independent low-voltage outputs), otherwise Sharing a set of windings is likely to cause common ground noise.

*The power amplifier output by the BTL of this board can also be used directly.
The protection action voltage is plus or minus 1.4V,
the power-on delay is about 6 seconds,
the power supply voltage is AC 10-20V,
the board size is 4.8×5.1CM

Finally, note that because the error of the electrolytic capacitor value is usually 20%, this error is relatively large, and the difference in capacitance will also affect the charging time, which will affect the problem of asynchronous connection between the left and right channels. (It is usually less than one second if it is out of sync). The split speaker protection board usually has the problem of out of sync connection. Friends who require synchronous connection do not shoot this, not as a reason for return or exchange.

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