Hi guys

I come across this power suppy, GW PSP-405, the user can adjust the output voltage digital from 0 to 40V 10mV step.

How can they achieve that? that's 4000 steps, do they use a 12bit dac or something else?

Thanks

 

Hi guys

I come across this power suppy, GW PSP-405, the user can adjust the output voltage digital from 0 to 40V 10mV step.

How can they achieve that? that's 4000 steps, do they use a 12bit dac or something else?

Thanks

Well it's programmable and I would think a multi turn pot or encoder of some sort..

 

Yes, 12 bit should do it. Likely an ADC and comparitor charging a large capacitor to maintain a steady power supply.

 

Yes, 12 bit should do it. Likely an ADC and comparitor charging a large capacitor to maintain a steady power supply.

I think you meant DAC, not ADC.

 

You could use a 12-bit DAC controlled by an up/down counter. A rotary digital quadrature encoder could give up or down pulses to the counter to adjust the voltage in 1-bit steps.