EM1402EVM: Primary Side Current Limit

Hi user,

Are you using the EM1402 EVM?

Is there any chance you could share this waveform? I would be interested to see it.

What is your cell count/cell voltage and what is the external battery voltage you are balancing too?

Hi,
I use the EM1402 reference design to design our battery management system.
On one board we use two EMB1428,each emb1428 manage 5 cells .

Hi user,

Thanks for the info... i think this should be ok.

The overshoot on the sense resistor will likely be due to the converter itself.

This is the figure show the voltage between 12VGND and Sense Resistor(10MΩ) of primary side as I mentioned above.

User,

I am assuming 10 milli-ohm, just to be sure!

I am assuming you've got  10 Li-ion cells (so 4.2V charge). What are you balancing to on the other side of the converter?

Could you share  the specs of your transformer?

What is  your balance  current you are trying to achieve?

Hi,
We have 10 Li-ion cells(3.2V each ).The primary Sense Resistor and second side Sense Resistor are both 10milli-ohm.We use EM1402 reference design to design our battery management system.So all the electronic components about EM1428 and EM1499 are same as EM1402 .

The other side of the coverter are 4 Li-ion cells(about4*3.2V=12.8V).

The transformer of our design is PA3856.005NL,and we want the balance current is 5A.

Regards!