UC2525A: syncronization by microcontroller

MORI ANTONIO

Prodigy 20 points

Part Number: UC2525A

I would like to synchronize 4 cards with UC2525A working in parallel.

I would like to generate the clock (about 40KHz) with a microcontroller and connect it to the 4 boards.

Should this clock be connected to the SYNC pin of the UC2525A?

How will the RT, CT, DISCHARGE pins be used ?

How to manage the Dead-Time of each card ?

Is there a different solution to synchronize 4 cards with a microcontroller?

Thanks

over 4 years ago

0 Sonal Singh over 4 years ago

TI__Expert 6080 points

Hello Antonio,

Please refer to the post below on how to sync multiple controllers.

https://e2e.ti.com/support/power-management/f/196/p/130842/522755?tisearch=e2e-quicksearch&keymatch=uc3525#522755

I hope this helps.

In terms of the Rt, Ct and dead time settings, I would suggest they are set the same on all your controllers.

Regards,

Sonal

0 MORI ANTONIO over 4 years ago in reply to Sonal Singh

Prodigy 20 points

if I understand correctly, this is what happens:
- I generate the F-frequency with the microcontroller. Is the duty cycle important?
- I connect this F frequency to the SYNC pin of each device.
- I use the RT-CT-DISHARGE pins of each device to obtain a 0.9F frequency and the desired dead time.

This way they all work in sync

So it would also be possible to do a frequency jettering with the micro ?

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UC2525A: syncronization by microcontroller