Other Parts Discussed in Thread: LMG2610
Hello:
It seems that the UCC29950 controller is presented as working with a specific boost output voltage ( e.g 385v).
Yet, it is a general controller for "boost" type behaviour. There is no reason why it cannot be set up to work with DCM SEPIC PFC topology, is there? Caveat is that a few things need to be understood and set up correctly.
Pl see the attached section of the Vbulk connection in pdf.
-Our preferred output will be 325V- the reason being we can use 350V GaN devices from EPC. For the HB LLC stage, this ought to give a sufficient margin.
- In order to get started, we plan to connect two diodes from ac line to the Vbulk node. This will also provide a situation Vbulk= Vac peak. Correct?
We can scale Rtop and Rbttm according to the situation here., Correct?
Rest of the parameters such as PFC_CS can be easily set up as the situation demands.
Is there a TINA TI model we can run to validate these changes?
Is there a GaN HB similar to LMG2610 for ACF topology but for LLC?
Will the LLC stage meant for high-power LED driver be able to be controlled for current in the string and be dimmable from the LLC by current control?
Appreciate any help in this matter.
-r
