Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Post History

60%
+1 −0
Q&A derating MLCC ripple current for transient current spikes

how much higher can i go in current ripple RMS None, of course, at least if you want to rely on anything else the datasheet says. The heating is a function of the RMS current. No, you don't get ...

posted 1y ago by Olin Lathrop‭

Answer
#1: Initial revision by user avatar Olin Lathrop‭ · 2023-09-24T14:35:30Z (about 1 year ago)
<blockquote>how much higher can i go in current ripple RMS</blockquote>

None, of course, at least if you want to rely on anything else the datasheet says.

The heating is a function of the RMS current.  No, you don't get to cheat physics.  Calculate the RMS of the pulse waveform, and make sure that doesn't exceed what the capacitor can handle.

Note also that there may be other limits, like short term pulse current, instantaneous voltage, and possibly maximum allowed heating over a short time window.  The RMS of your pulse may be within spec, but it may violate one or more other such parameters.

As always, you have to read the datasheet carefully and make sure you take all the limits into account.