The below figure is a screenshot from MPM3620‘s datasheet.
Now I want to add a snubber circuit for MPM3683-7 to reduce its radiation and improve EMI performance？ Does it OK？
Now I want to add a snubber circuit for MPM3683-7 to reduce its radiation and improve EMI performance？ Does it OK？
Hi lixinlong_link,
Welcome to the MPS Technical Forum. I will look into your question and post an answer shortly.
Hi Bryan，
I’m waiting for you(Just kidding).
I have added a snubber circuit to MPM3683-7, though the effect is not very good.
Hi lixinlong_link,
Though adding a snubber isn’t mentioned in the MPM3682-7 datasheet, including it in a design using this device shouldn’t be an issue or present any negative effects. Can you describe/share the results you are seeing with the snubber attached in your design please?
Hi Bryan,
This MPM3683-7 is used to supplying 1.8V for two Xinlix FPGAs and the current is about 4A, in a digital oscilloscope. Then about 1mV periodic noise with the same frequency as switching frequency appears in the base noise of the oscilloscope.
I actually didn’t do any tests or measurements. I just caught a glimpse of the final phenomenon. And the pk-pk value of this periodic noise has a tiny reduction. Maybe the efficiency also has a little decrease, but I didn’t test.
Hi lixinlong_link,
Do you still need help on this question? Please let me know any concerns and share any test results you have so we can better assist you.