My LM3886 HIFI AMP!!!

[mrfeedback]

Your 110/240v tracks are too close together, and too close to secondary side circuitry.
Better off not running mains on the board.

Eric.

[AndrewT]

Originally Posted by mrfeedback

Your 110/240v tracks are too close together, and too close to secondary side circuitry.
Better off not running mains on the board.

Eric.

and far too long.

If mains is on PCB then keep is small/compact, keep it well spaced from other voltages, add supplementary insulation to prevent accidental contact.

[gxcnabin]

Thanks for your advice, we already make prevent accidental contect by small part cutting off the pcb for separete two deference voltages,

[gxcnabin]

New process！！

[gxcnabin]

New process！！

[gxcnabin]

New process！！

[pacificblue]

Originally Posted by gxcnabin

Thanks for your advice, we already make prevent accidental contect by small part cutting off the pcb for separete two deference voltages,

The usual recommendation is to have 1 mm separation per 100 V between adjacent non-isolated leads. For 230 V you should use 100 mil (2,54 mm) or more separation. It makes no difference, whether you route a slit into the PCB or not, because the isolator remains to be air.

The recommended minimum trace width for 230 V is 50 mil (1,27 mm).

And by the way, since the early 1990s the international norm voltages are 115 and 230 V.

The supply traces to the LM3886s also look flimsy when you take into account that each of them can deliver 8 ADC or 5,6 AAC continuously.

Why do all your different "processes" carry the same version number V1.0? How do you keep track?

[gxcnabin]

Originally Posted by pacificblue

The usual recommendation is to have 1 mm separation per 100 V between adjacent non-isolated leads. For 230 V you should use 100 mil (2,54 mm) or more separation. It makes no difference, whether you route a slit into the PCB or not, because the isolator remains to be air.

The recommended minimum trace width for 230 V is 50 mil (1,27 mm).

And by the way, since the early 1990s the international norm voltages are 115 and 230 V.

The supply traces to the LM3886s also look flimsy when you take into account that each of them can deliver 8 ADC or 5,6 AAC continuously.

Why do all your different "processes" carry the same version number V1.0? How do you keep track?

The usual recommendation is to have 1 mm separation per 100 V between adjacent non-isolated leads. For 230 V you should use 100 mil (2,54 mm) or more separation. It makes no difference, whether you route a slit into the PCB or not, because the isolator remains to be air.

The recommended minimum trace width for 230 V is 50 mil (1,27 mm).

Complete meet standards.And by the way, since the early 1990s the international norm voltages are 115 and 230 V.


The voltage supports 100-110-115V 220-235-245V


The supply traces to the LM3886s also look flimsy when you take into account that each of them can deliver 8 ADC or 5,6 AAC continuously.

After completing, is not you saw like this, thanks your reminder.
Why do all your different "processes" carry the same version number V1.0? How do you keep track?

PCB did not formally before the,is the identical edition number.

Thanks your reminder once more!!!
abin

[AndrewT]

Hi GX,
you replies to Pacific's post do not make sense.
What is your native language?
Maybe you should present your questions in your own language and provide a translation to english for the Forum members.

[gxcnabin]

PCB。。。。。