Negative voltage ORing circuit

A.S.Bhushan

Expert 1060 points

Other Parts Discussed in Thread: LM5068, TPS23525

Hi,

We used TPS2412PW for oring circuit for +24V, 10A. It is fine.

We also designed DC-DC converter as well as AC-DC converter, both will give -15V,5A.

If AC-DC converter will fail, automatically load will be on DC-DC converter.

Now, we have to design ORing circuit for (negative voltage) -15V. (We have to combine two -15V, 5A). Please suggest any IC or design.

Regards,

A.S.Bhushan

over 7 years ago

0 Aleksandras_Kaknevicius over 7 years ago

TI__Genius 15780 points

Hi A.S.Bhushan,

At this time, TI does not have any IC's capable of switching or power muxing negative voltages. Could I ask what your application is?

Thanks,

Alek Kaknevicius

0 A.S.Bhushan over 7 years ago in reply to Aleksandras_Kaknevicius

Expert 1060 points

Hi Alek,
Thanks for your reply. CAN I USE LM5068?

Regards,
A.S.bhushan

0 Rakesh over 7 years ago in reply to A.S.Bhushan

TI__Guru** 105811 points

Hi A.S.Bhushan,

Please look at -ve Hot Swap and Dual OR-ing Controller TPS23525 and let me know if you have any questions.

Best Regards,
Rakesh

0 A.S.Bhushan over 7 years ago in reply to Rakesh

Expert 1060 points

Hi Mr. Rakesh,
Thanks for your reply.
As per datasheet of TPS23525, heading itself showing that it is -48V ORing controller.
Will it be operate at -15V?
I though that it should work. isn't it?

0 Rakesh over 7 years ago in reply to A.S.Bhushan

TI__Guru** 105811 points

Yes, its operating range is from –10V to –80V DC

Best Regards,
Rakesh

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Negative voltage ORing circuit