DC/DC power supply regulation

[laser_freak]

I have a regulated 9V AC/DC power supply suppling an unregulated +/- 12V DC/DC power supply. Will the regulation from the AC/DC supply allow for a regulated output from the DC/DC supply?

 

[Cyparagon]

Maybe. Are you sure the DC/DC converter is unregulated? Does that mean that the output voltage is dependent on the input voltage?

 

[laser_freak]

Unregulated meaning the voltage will change based on the load (due to internal resistance). In other words, the regulator does not compensate the voltage for the load.

 

[Cyparagon]

Then no. It doesn't sound like it will be regulated.

Just the same: line voltage itself is regulated, but an unregulated AC/DC power adapter will still be unregulated.

 

[laser_freak]

That is what I had suspected. Thanks.

 

[lasersbee]

A +/- DC/DC Power supply as you call it is a DC/DC converter
that outputs a noisy output that need to be filtered...
It is regulated at its specifications in voltage but the output
is not pure DC... It must be filtered...

Jerry

 

[laser_freak]

Allow me to be more specific. The DC/DC converter I am using is Digi-Key - 102-1352-ND (Manufacturer - VASD1-S12-D12-DIP)
It is what is found inside my nospin LPM and is used to power the thermopile. It is not filtered, and the datasheet says it is unregulated. I was hoping to replace it for a regulated converter.

 

[lasersbee]

If you look at page 3 of that Data sheet you will see
how to add regulation to that DC/DC converter...

Why would you want to change the DC/DC conveter
that was designed into the Nospin LPM....:thinking:
If it ain't broken.... don't fix it...

If you have a clean regulated input to the DC/DC
converter... you only need to filter it's output...


Jerry