Switching power supply

[Christopher Alexandre]

Hi i have a switching power supply 12v 30a (360w) if i adjut it at 10v will it be able to supply 36a? For more info when i ask it to much amp (on 12v) the voltage drop to have a maximum power of 360w. Thanks. So, to resume if i adjust it at 10v will it be able to supply 36 amps ?

 

[davenn]

hi there
welcome to EP

possibly it would be OK
getting a spec sheet for the supply would be the best confirmation, anything else would be a guess


Dave

 

[Christopher Alexandre]

Thank you! I dont a the spec sheet... I have an other question: when i turn the screw to adjust the voltage what do i adjust? A resistor? Thanks

 

[davenn]

yes it is adjusting a variable resistor but that VR is just a part of a larger voltage control circuit

 

[Christopher Alexandre]

Ok i understand! So to know if it s able to supply 36 amp i have to know if the resistance of the cicuit goes down when the viltage goes down.

If not the heat will be to hige because of p=ri2 so

 

[duke37]

There are two limits for your power supply, 12V and 30A. Going beyond either of these could lead to trouble. The internal components will have voltage and current limits. You may be able to get away with a few more amps if cooling is very good but you are skating on thin ice and the high current components are expensive.

 

[Alec_t]

I agree with duke37. The internal components are unlikely to be rated for 36A. In particular, the inductor may saturate if the current is greater than 30A. That could lead to catastrophic failure of the supply.