The Tamura BPM2417SJ DC DC supply shows a voltage adjustment pin, but there are no details on how to adjust the output voltage. All available documentation I can find does not include any information on how to adjust the output voltage (I need to keep it below 24.6v, and the spec sheet says regulation can be +/- 5% so by spec it could natively be significantly above what I need.
Any help would be appreciated.
Hello robws and welcome to the DigiKey TechForum.
After reviewing the documentation, I see no indication that the output voltage would be adjustable. I know that they have Pin 7 indicating it is an Output Voltage adjustment terminal, but there are no documentation or instructions that I could find that indicating how to adjust the output voltage. All of the graphs that they provide also appear to indicate that the output voltage would be fixed at 24V +/- 5%.
Hi Nick, Thanks for the feedback. Is there any chance you, or someone at Digikey, could get an support engineer from the manufacturer to provide some help on this? I also have questions are the extremely large 100uf capacitance they call for on the input side.
I have tried to contact them through their website twice with no luck.
Thanks!
Rob
Connecting the trim pin to output positive or negative via a resistance of some value is the near-universal technique here, though the transfer functions do vary. I’ve made a request for clarification on the point.
Regarding the input capacitor, the diagram on page 2 of the datasheet is documentary in nature rather than prescriptive; it’s indicating the circuit used in measuring the characteristic data shown and not necessarily a recipe for how it ought to be used in practice. The application note on offer discusses relevant considerations at somewhat greater depth.
