Part Number: UCC5350 Other Parts Discussed in Thread: SN6501 , UCC21551 I want to use UCC5350MC to drive the MOS transistor in the BUCK circuit, and I would like to ask:
(1) How do I connect the VEE pins on the secondary side of the chip? Can it be directly…
Hello,
1. The high side drive looks like they are using a PNP/NPN totem pole driver on the high side FET. I have seen this used before and it should work. You should be able to drive these FETs directly with a gate drive transformer as well.
The benefit…
Part Number: UCC23513 Other Parts Discussed in Thread: STRIKE , , UCC21551 , UCC21530 Hi Team,
just want to check how to achieve the Vcm in below CMTI test. My customer also want to test CMTI and want to check how we achieve this. Thanks.
BRs
Given
Part Number: UCC21550-Q1 Other Parts Discussed in Thread: UCC21550 , UCC21551 Dear teams,
Rdt=1k is not within the range of the datasheet. Is there any other way to calculate DT at this time?
Thanks!
Hi Fabio,
Yes, this device is designed to work with SiC MOSFETs that can work with the UVLO options that the UCC21530 provides. If a higher UVLO option is a better fit for the power switches used in the system, I would highly suggest looking into the…
Part Number: UCC21530-Q1 Other Parts Discussed in Thread: UCC21551 The VCC and the Enable PIN are provided with 5v. Please find the picture below. Why the enable pin shows less voltage of around 2.6V? Is there any reason for this?
Please find the picture…
Hi Shahamat,
That sounds like a working idea to me. Can you explain "current unfolding"? Why is there a higher frequency for S1 and S3?
It sounds like it will save space to use a dual channel driver, and there is not a channel spacing requirement…
You can also use my new UCC21551 model. Let me know if you find any bugs, and I will correct them. The UCC21550 will be the "disable" version, which replaces the UCC21520. But otherwise the UCC21551 should have identical performance.
Best regards…
Hi Shiram,
I do not have a model for that part, but here is a model for the UCC21551, which will be the update for that family of devices. It has similar functionality to the UCC21542, but it has a 12V UVLO. Attached below is a PSPICE-for-TI version,…
Hi Michael,
TI of course has integrated buck regulator chips for ~100Vin. Is a discrete design required for a higher voltage and power buck converter?
A synchronous buck converter will look like a half bridge inverter, so I would start with the UCC21551…