LM5064: Diode placement questions when configuring the LM5064 product circuit

PARK SANGHYUN

Part Number: LM5064
Other Parts Discussed in Thread: TPS23525, LM5051

LM5064 product circuit configuration questions
As shown in the figure, we try to supply power in the direction of BackPlane by receiving -48V input from Unit 1/2.
When Unit 1,2 is connected in the backplane, inquire about where to place the diode to prevent reverse voltage due to voltage difference, and whether there is a configuration to recommand

over 5 years ago

0 Rakesh over 5 years ago

TI__Guru** 105361 points

Hi Park,

Welcome to E2E!

Can you please reinsert the image.

Best Regards, Rakesh

0 PARK SANGHYUN over 5 years ago in reply to Rakesh

Intellectual 290 points

Sry, I didn't know, that image was broken.

0 Rakesh over 5 years ago in reply to PARK SANGHYUN

TI__Guru** 105361 points

Hi Park,

Thanks for the block diagram. In this configuration, one of the two sources which ever higher powers the load. So, instead of diodes I suggest to use ORing+hot-swap solution like TPS23525.

If you want PMBus compatible device, you can use LM5064 + diode at Point#2. To save power loss across the diode, you can consider Low Side OR-ing FET Controller LM5051.

Please go through these and let us know if up have followup questions.

Best Regards, Rakesh