LM25145: Current sharing circuit design

Allen yang

Intellectual 930 points

Part Number: LM25145
Other Parts Discussed in Thread: LM5148, , LM25148

Tool/software:

Hi Team,

There are two power supply modules with different power,

30W and 50W respectively, Supply 80W equipment.

How to design current sharing circuit?

The functional block diagram is as follows.

25 days ago

0 Dino Maslic 24 days ago

TI__Expert 5530 points

Hi Allen,

Unsure what you are trying to do with this current sharing circuit, can you explain further?

Thanks,

Dino

0 Timothy Hegarty 24 days ago in reply to Dino Maslic

TI__Guru 74052 points

Hi Allen,

The LM5148 (80V) or LM25148 (42V) peak current-mode controller is a better option here, as you can connect the COMP signals to share current equally between the two 12V outputs. It's more more challenging with voltage-mode control (LM25145).

Regards,

Tim

Power management

Power management forum

LM25145: Current sharing circuit design