TPS5430: Calculation example of TPS5430

And additional, I`d ask how did to find RMS ripple current in 143 mA?

HI:

for voltage mode control loop you can refer, section 9.1.3

https://www.ti.com/lit/ds/symlink/lm5145.pdf

for RMS ripple current, you need calculated the duty cycle first, then you know the raise time and fall time of inductor which means you have I(t) function. then integrate I(t)^2 from 0-ton and ton-toff, then you can have Irms at 140mA

Thanks

Daniel Li

Hi Daniel! Haven't figured it out yet, are there more detailed examples?

Hi 

pls check below apps notes at 3.1.1

Thanks

Hi, Daniel! Thanks)

In my solve, I got ton=0.65*10-6 c and toff=1.344*10-6 c. Is it can be true? In finally I got 19 uA current ripple.

Hi 

you can download below software to check your result

Thanks

    Hi! Great application on first view! My ton toff is fugure out the same, but the RMS current ripple it isn`t so (in the program 250 mA). Below I`d like to show my equation.

Hi

you missed frequency.

Thanks

Which is it position in to formula? Write, please. 

Hi, Daniel! I used the RMS current formula and fugure out not the same result as program`s TI. My value is 0.6 uA ! Instead zero I put the number is 0.65*10^-6 and instead T - 1.34*10^-6. Then first I calculated not-defined integral: 1/3*(Output current^3, where Output current = 3A). In the end I calculated defined integral.

Maybe I catch a mistake?

What does the character <t>?

I got 1,769A