LM7310: How to use LM7310 for Common source point to Multiple slave's

Rahul Surawase48

Part Number: LM7310
Other Parts Discussed in Thread: TPS25946

Hello TI,
We are using LM7310 to Distribute our Source voltage(Battery charging Input voltage) to the multiple slave (Battery), There is any reference design of LM7310
In Datasheet of LM7310 there is clearly mention the 2 Active device Oring method can we use it as it is I am sharing both Images datasheet and My design, Please revert us if there is any changes required in design

over 4 years ago

0 Rahul Surawase48 over 4 years ago

Expert 2395 points

0 Kunal Goel over 4 years ago in reply to Rahul Surawase48

TI__Guru* 79181 points

Hi Rahul ,

I did not understand your application. What are the two inputs in attached schematic and what is output? Please fill this design calculator https://www.ti.com/lit/zip/snor027 for schematic review.

Regards

Kunal Goel

0 Rahul Surawase48 over 4 years ago in reply to Kunal Goel

Expert 2395 points

Hello Kunal,
There is four Lithium ion battery cell which we need to control and monitor by using LM7310, is it possible with it ..?

Can i use LM7310 in bidirectional, battery cell can able to charge and discharge through this Switch.

Thanks,
Rahul

0 Kunal Goel over 4 years ago in reply to Rahul Surawase48

TI__Guru* 79181 points

Hi Rahul,

LM73100 has reverse current blocking. You can not use it for bidirectional control. Please share a block diagram of your system. In the figure you shared earlier ,what is input and what is output?

Regards

Kunal Goel

0 Rahul Surawase48 over 4 years ago in reply to Kunal Goel

Expert 2395 points

Hello Kunal,
As per the requirement, i am sharing design block diagram for details understanding of LM7310 use case.
Please confirm that can i able to use LM7310 for my cell control and load control application, if no please suggest alternative option for it.

Thanks,
Rahul

0 Kunal Goel over 4 years ago in reply to Rahul Surawase48

TI__Guru* 79181 points

Hi Rahul,

My understanding is that when input adapter is connected then BMS is charging 4 Li-ion battery and also powering RPi. When adapter is not connected then power flow is from Li-ion cell to Rpi.?

LM73100 can not be used for cell control because it is not bidirectional. Please check device TPS25946 which has bidirectional control feature.

Regards

Kunal Goel

0 Rahul Surawase48 over 4 years ago in reply to Kunal Goel

Expert 2395 points

Hi Kunal,
Yes, but we required Individual control of cell, If the user inserted cell reverse polarity into the system and if there any cell from 4 Parallel cells is damages or not working correctly then we need sense it and want to take further action corroding to that.
Your suggested part TPS25946 is suitable for that application ..?

Thanks,

Rahul

0 Kunal Goel over 4 years ago in reply to Rahul Surawase48

TI__Guru* 79181 points

Hi Rahul,

Yes for bidirectional control we only have TPS25946. LM73100 does not allow current from OUT to IN. But TPS25946 does not have reverse polarity protection . I am just curious to ask why can't we just short positive terminals of cell and make one cell ?

Regards

Kunal Goel

0 Kunal Goel over 4 years ago in reply to Kunal Goel

TI__Guru* 79181 points

Hi Rahul,

Let me know if you have further query or response ,If not I will close the thread.

Regards

Kunal Goel

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LM7310: How to use LM7310 for Common source point to Multiple slave's