This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi,
I use this device in my design and I have two questions:
1. I connect pin 20 (NC) to +5V (for compatibility purpose). Could I have problems?
2. The datasheet shows how to adjust the voltage level for channel 2 through a voltage divider. This voltage divider set the voltage level at REFIN2, using VREF2 for that. Can I use VREF3, instead of VREF2, for setting the output voltage level?
Thank you in advance,
Fernando.
Hi,
Sorry, I saw other question about this device in this forum and I posted in the same (without verifying it).
Thank you.
hi Fernando,
sorry for the late reply, I just saw it...
with reference to your question I would say:
1) there should be no problem at all since the pin is NC (not electrically/phisically connected)
2) you can see REFIN2 as FB2; this means you could use any reference you want to do that, but be aware that the reference at this pin has to be lower than 2V (or 2.5V, not sure), meaning you have to use a voltage divider from the external VREF you want to use to REFIN2. When you apply a voltage greater (for istance the VREF3 or VREF5 directly to REFIN2 then the VOUT2 is fixed, in according to the table 5 on page 33 of the device datasheet). In brief, yes, you can use any VREF you want but be aware that a voltage divider is needed from VREF to REFIN.
PS: which processor/graphic card are you going to supply? if you let me know more about your app I could address better the topic...
hope this helped a bit
KR
Vincenzo