Other Parts Discussed in Thread: UCC21710
Hi, I'm designing a buck converter, which a LM2742 is used to drive the low voltage side of 2 UCC21710s, as picture below shows.
- I want to make sure there won't be any ground level issue by "connecting BOOT with Vcc" & "HG / LG to 2 driver ICs with same ground level", since LM2742 is originally designed to directly driving a half-bridge of power converter.
- Also, without directly driving a half-bridge, I'm confused with the necessity of PGND/SGND separation.
- Do I need to "cover HG/LG with PGND plane(Digital signal)" and "cover FB/EAO with SGND plane(analog signal)"?
- Or there won't be any differences when LM2742 is not directly driving a half-bridge?
Thanks for your advise!