KP_TRANSIENT
I didn't know if the last comment thread is archived or not so I thought of creating another forum topic. Sorry if that post is not archived.
I'm having trouble with the parameter as I am trying to design for output current of 0.36A with the LNK3206D but with a inductor of 470 uF I am above 0.2 KP_TRANSIENT but the inductor value is too small.
So when I increase the size of the inductor to 1200 or 1400uH, the KP_Transient drops to 0.09 which is another violation. I noticed that the design is setup as a MCCM. I am trying to design for CCM.
Would really like to know how I can make this work.
Please see the image attached for more information.
Thanks!
Files
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PI-KPTransient.PNG | 58.98 KB |
回應
Hi saiknaram,
Good day!
The post was not archived and your inquiry has been already acknowledged by our representative and will be attended in a while. I am glad that you created a new post. In the future, I encourage you to do the same and simply copy the link of the thread in your new post if you think relevant.
Thank you and regards,
PI-Lupin
Hi saiknaram,
Since this is an on/off controller, the sequence of pulse cannot be periodically CCM or DCM. MCM means 'Mostly Continuous Mode' and implies that a majority of switching pulses will be continuous. With regards to KP_TRANSIENT, the spreadsheet is simply flagging an 'Info' message notifying the user that an SOA trigger may occur and should be tested in the actual prototype. Unlike a 'Warning' message, this is not a catastrophic event/failure.
Thank you.
Adding picture.