Hi everybody,
can anyone help me in this. I have two output voltages from a smps. for example 5V & 12V. sometimes i want to use 5V & othertime 12V. how to design this. how to switch from 5V to 12V?
Thanks in advance

 

SMPS are usually (but not always) like conventional linear power supplies in that they have a voltage reference. If you can change the voltage reference for the regulator with a switch the output will follow.

 

Hi everybody,
can anyone help me in this. I have two output voltages from a smps. for example 5V & 12V. sometimes i want to use 5V & othertime 12V. how to design this. how to switch from 5V to 12V?
Thanks in advance

Are you trying to design an SMPS that will be able to switch from one output voltage to the other?

What's the original input voltage and the output current requirement at each of the voltages?

What do you have so far?

 

Are you trying to design an SMPS that will be able to switch from one output voltage to the other? ?

Yes

What's the original input voltage and the output current requirement at each of the voltages?

What do you have so far? ?

input voltage 85 to 265 VAC
Output voltage 12V & 5v

 

You might as well use a MOSFET which switches between the two reference's (5V&12V),if your out put needs to switch with respect to time.Switch the MOSFET at the same rate.


Thank You!