We plan to parallel six 100A power modules to deliver a total output current of 600A. In this application, what is the best approach to monitor current using shunt resistors, given that the required shunt size becomes quite large? Do you have any recommendations?
Hello @flint,
Welcome to MPS forums. First of all, can you tell me the module part number which you are referring to? Are you planning to monitor current through each module or total output current (i.e 600 A)?
Hello @flint,
What is the input voltage? For this application, I would recommend using MPM3698 + MPM3699. For monitoring the current, shunt resistors can be used along with an external ADC monitor for the current.
Hello @flint,
For information related to lead times, please submit a ticket by filling the MPS NOW Technical Support From. For measuring 600 A, you will need a bigger shunt resistor to measure the total 600 A and it would not recommend using small shunt resistors at each output as it will lead to more components and cost.
Hello @flint,
For parallel combination of multiple MPM82504, each device should be configured the same register value for the equal output current and voltages.
The MPM82504 can be paralleled together as per figure 13 in the datasheet.
Hi,
I apprciate your help, thanks.
Hello @flint,
The MPM82504 has internal register MFR_CTRL_COMP command that configures the loop compensation with different ramp values corresponding to the values set in the register. If the layout introduces additional voltage drop which is lower than the set register value, there might be stability issues which will affect the overall regulation. Here is more information in the datasheet.
Hope this answers your question.
Hello,
I got it, thanks.