Part Number: UCC28951 Tool/software: Project Specs: Vo: 24VDC Vin: 550V P=500W I am using UCC28951 (PSFB topology) IC for DC-DC isolated power supply project. I have a full bridge synchronous rectifier on the low voltage (secondary) side instead of a half…
Hi Venkatesh,
I am afraid you need to add snubber on secondary side, due to the fact every transformer has leakage inductance.
This leakage inductance is generating lot of loss if not properly snubbed.
You can see it in the voltage of all rectifiers on…
Hi, Sanghyun,
Do you have to keep the same transformer and snubber cap or you are open to change the power stage?
I am not sure where you read UCC28950 is not efficient when input voltage is low. 48V input is not low. Can you point me the source of your…
Other Parts Discussed in Thread: PMP7246 , UCC28950 Dear
My customer is very interesting in TI Design PMP7246 now.
PMP7246 is very useful to make board for My customer.
My customer is planning to make board using UCC28950.
To make board, my customer refer…
Part Number: UCC28950 Other Parts Discussed in Thread: PMP7246 Hello,
May I ask for more detail on ' two quadrant converter' and 'backward in average current mode limitation' of UCC28950? I'm looking at PMP7246, but I cannot find any…
Hi Sreeni,
Thank you for the query on UCC28950.
Since your current is very high PSFB would probably be the choice to go for.
I can recommended a couple of reference designs for this input voltage range but 250A will require paralleling multiple modules…
Hi, Alex
Sorry for confusing you, the reference design PMP5726 and PMP7246 shows the Phase shift full bridge can support 2 quadrant application. The output current could be reverse when output voltage is decreasing linearly.
The reference design PMP5726…
Part Number: UCC28950 Other Parts Discussed in Thread: PMP7246 Hi,
I see in the PMP7246 ref. design that they are using "BSC057N08NS3" MOSFETs. Those are in a SuperSO8 package.
This is my first time using that type of package in power applications…
Hi Raghavendra,
Here are a few reference designs in the power range you are interested in. I am not seeing any reference designs that meet the 97% efficiency requirement but these could serve as a starting point for you.
www.ti.com/.../PMP3162
www.ti…
