Would you calculate and re-draw the circuit overcurrent protection ? - diyAudio
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Old 25th December 2011, 06:44 PM   #1
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Default Would you calculate and re-draw the circuit overcurrent protection ?

Would you calculate and re-draw the circuit overcurrent protection??
thanks...
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Old 25th December 2011, 07:18 PM   #2
wahab is offline wahab  Algeria
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Quote:
Originally Posted by umut1001 View Post
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.

Last edited by wahab; 25th December 2011 at 07:22 PM.
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Old 25th December 2011, 07:33 PM   #3
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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
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Old 26th December 2011, 04:02 AM   #4
djk is offline djk
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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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