Speaker protection circuit ----- Speaker Protection

Keywords: speaker protection circuit, speaker protector circuit Speaker protection circuit As shown as the speaker protection circuit. It is designed to stand independently of left and right channels. In the figure, R2, C4, and VT2, VT3 of the left passage constitute a power-off delay circuit to prevent a large current impact speaker. Component Selection: LEDs can be selected from φ3mm high brightness two-color light-emitting diode. Since the working current of the LED is large, the parameters of R5 and R9 are slightly adjusted. At the same time, the LED and the current limiting resistor R5, R9 can also suppress anti-peak voltage to prevent breakdown VT2, VT3, and VT5, VT6 in parallel to both ends of the relay RE1 and RE2. C4, C9 preferably use low leakage tantalum capacitors. The other component parameters are shown in the figure.

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