Hi everyone! I have a +24v 4a linear power supply and I want to add a module to provide phantom power to 6 preamplifiers. Every +48v feed must have a led that indicates the status. I think I could do it with this dc/dc converter: http://www.farnell.com/datasheets/1897342.pdf?_ga=2.22753787.1719564225.1530013216-424264997.1529698549 .
The specific model is JCD0624D24. I'm doubtful about two things: the model is a double out one (+-24v/+-125ma). Can I use the -24v rail as ground and obtain a +48v or it'll mess the converter? On the datasheets of models from other vendors the viability of this configuration is stated clearly, but there's nothing in this one. Provided that the configuration is feasible, this will change the output current from +-125 to +250ma, am I right? One last thing: I'm following this guide https://www.coilcraft.com/pdfs/doc191_CMFiltDesign.pdf to design a proper common mode filter for both the input and the output of the converter. Regarding second order filter at page 3 it says: "Identify the load resistance at the cutoff frequency: Assume RL= 50Ω". How I identify the load resistance at the cutoff frequency of the filter? Wouldn't different microphones have different impedances at those frequencies?
Thank you,
Marco
The specific model is JCD0624D24. I'm doubtful about two things: the model is a double out one (+-24v/+-125ma). Can I use the -24v rail as ground and obtain a +48v or it'll mess the converter? On the datasheets of models from other vendors the viability of this configuration is stated clearly, but there's nothing in this one. Provided that the configuration is feasible, this will change the output current from +-125 to +250ma, am I right? One last thing: I'm following this guide https://www.coilcraft.com/pdfs/doc191_CMFiltDesign.pdf to design a proper common mode filter for both the input and the output of the converter. Regarding second order filter at page 3 it says: "Identify the load resistance at the cutoff frequency: Assume RL= 50Ω". How I identify the load resistance at the cutoff frequency of the filter? Wouldn't different microphones have different impedances at those frequencies?
Thank you,
Marco