Audio Amplifier Overload Protection Circuit

Amplifier with overload protection - UNICORD, INCORPORATED

https://www.freepatentsonline.com/3930207.html#:~:text=A%20transistor%20amplifier%20incorporates%20a%20protective%20circuit%20which,connected%20between%20the%20preamplifier%20power%20supply%20and%20ground.

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Amplifier Short/Overload Protection Circuit - 2 Ideas ...

https://www.homemade-circuits.com/make-this-amplifier-shortoverload/

Speaker Protection circuit - Hifime Audio

https://hifimediy.com/download/Speaker_Protection_Circuit.pdf

Protection Circuit is designed to be used for audio amplifier nly, and speakers protection o proper operation with any other type of load is not recommended or guaranteed. The voltage levels present on the board during proper operation should not exceed 60V for the default type relay or 100V for the option type relay otherwise damage might .

Amplifier/Loudspeaker Overload Protector Circuit

https://makingcircuits.com/blog/amplifierloudspeaker-overload-protector-circuit/

The presented amplifier short/overload protection circuit diagram, demonstrates a cheap design utilizing just a single transistor for applying the meant feature. Usually a low value resistor is normally used at the output of mosfet amplifiers, the current designed across this resistor could be well used for tripping a relay just in case it surpasses the safe highest current …

Overload protection circuit. Does it work ... - diyAudio

https://www.diyaudio.com/community/threads/overload-protection-circuit-does-it-work-correctly.64268/

As other people has already mentioned, that circuit is not reliable in overcurrent conditions because the current limiting protection is incomplete. In order to fix that I prefer to use a emitter resistor, and a current limiting transistor, connected in such a way that it shunts the base drive of the BD139 when the voltage drop across the ...