SM3320-BATT-EV: How to charge 36V Li-Po battery using SM3320-BATT-EV

Natesan Sambasivam

Part Number: SM3320-BATT-EV

Is there any reference document on how to charge a 36V Li-Po battery using SM3320-BATT-EV? what changes have to be done in both the hardware and software? It would be useful if anyone advises me on this.

over 5 years ago

0 Garrett Roecker over 5 years ago

TI__Mastermind 21720 points

Hi Natesan,

Thanks for reaching out with your question and for using the SM72442.

There is not any document that specifically covers how to charge a Li-Po battery.

-Garrett

0 Jeffrey Mueller over 5 years ago

TI__Genius 12990 points

Hi Natesan,

I am the apps engineer for SM72295 (the full bridge gate driver).

For SM3320 reference design help check out section 15 of AN-2121 (https://www.ti.com/lit/an/snosb76c/snosb76c.pdf). Though the discussion is about Li-ion, Li-Po is not very different. Let me know if you have any questions.

Thanks,

0 Natesan Sambasivam over 5 years ago in reply to Jeffrey Mueller

Prodigy 210 points

As I said, I want to charge a 36V battery, what are the changes that have to be done apart from the output capacitors(voltage rating)? could you please clarify?

0 Jeffrey Mueller over 5 years ago in reply to Natesan Sambasivam

TI__Genius 12990 points

Hi Natesan,

Thanks for the update,

You can adapt this design for 36V battery by changing the MOSFETs (and passives) used in the buck/boost converter section of figure 20 in the design guide AN-2121. Section 15 of AN-2121 (https://www.ti.com/lit/an/snosb76c/snosb76c.pdf) helps with reconfiguring the OVP passives. Please let me know if you have any questions on this.

Thanks,

Power management

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SM3320-BATT-EV: How to charge 36V Li-Po battery using SM3320-BATT-EV