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-   -   Would you calculate and re-draw the circuit overcurrent protection ? (http://www.diyaudio.com/forums/solid-state/203141-would-you-calculate-re-draw-circuit-overcurrent-protection.html)

umut1001 25th December 2011 06:44 PM

Would you calculate and re-draw the circuit overcurrent protection ?
 
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Would you calculate and re-draw the circuit overcurrent protection??
thanks...

wahab 25th December 2011 07:18 PM

Quote:

Originally Posted by umut1001 (Post 2834001)
Would you calculate and re-draw the circuit overcurrent protection??
thanks...

There s no protection in this amp.
This schematic is the application note of Hitachi for their
lateral fet devices , although this version has different resistors
values , the 47pF compensation is also at the wrong place as
it should be connected between base and collector of the facing
MJE340.

You can add a diode and a zener in serial from gate and drain
of the of the fets to provide some current limitation.

umut1001 25th December 2011 07:33 PM

Hello.It is for my friend.His English is not good enough.He meant "would you calculate and draw a circuit protection for this amp" Thanks in advance

djk 26th December 2011 04:02 AM

All that is needed for this 50W/8Ω amplifier is a 3A fuse on the speaker out, 10V gate zener diodes, and a 85C thermal switch on the heatsink.


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