10A 1.2 to 20V power supply

[Captain Nguyen]

I have found this schematic from internet.
But I have adapt from 2A to 10A power supply.

Could this work?

 

[audioguru2]

How are you going to cool the MJ15004 power transistor when it must dissipate 313W??
It will melt. You will need many power transistors mounted on a huge heatsink and a high velocity fan.

The 25VAC transformer produces a peak voltage of 35.4V. The rectifier bridge will make a voltage of 33.4VDC. When the output voltage is turned down to 1.2V then the MJ15004 power transistor will have 32.5V at its emitter and 1.2V at its collector and 9.5A through it. Its power dissipation will try to be (32.5V-1.2V) x 10A= 313W.

 

[Captain Nguyen]

MJ15004 use 250W.  :-X
Have not looking to datasheet.
Datasheet MJ15004

Is this schematic right now?

 

[audioguru2]

MJ15004 use 250W.

 

[Captain Nguyen]

I understand,

Thank you.

 

[Captain Nguyen]

I have thinking about this.

I will made from 10A into 5A.
10A is too much for my projects.

 

[MP1]

If you have a 10 amp supply, it does not mean your projects will use 10 amps. They will only take what they need. However, you should take precaution to have some limiting feature whether it is a 10 amp or 5 amp supply.

MP