LM5050-1: Reverse protection is failure

Cooper Zhang1

Part Number: LM5050-1

Dear:

LM5050-1 is application in two battery in parallel, it acts reverse protection function，but now the function is failure, the schematic is as attached，please kindly help me check,many thanks~

over 4 years ago

0 Praveen GD over 4 years ago

TI__Guru 57737 points

Hi Cooper,

I understand that you are using 2x LM5050-1 to achieve ORing between two batteries.

What do you mean by 'reverse protection function' ? Do you mean reverse current blocking ?

Also, please elaborate more on the type of failure and the condition at which failure occurs.

0 Cooper Zhang1 over 4 years ago in reply to Praveen GD

Expert 2190 points

Dear Praveen:

I sent the schematic again, you are right that i am using 2x LM5050-1 to achieve ORing between two batteries;

now refer to P14 figure 21 or 22， but I found the issue occurs: connect battery one , no connect battery 2, but I found batery 2 voltage that there is 5.5V value , it should be zero; however, occasionally, I found the battery 2 voltage is 24V. so the LM5050-1 is no working.

note， the LM5050 power supply connects to the output.