BQ40Z80: Function questions

Victor Nunes

Prodigy 30 points

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQ25750

Tool/software:

Hello there....

Im design a system with BQ40Z80 and I have some questions about the operation off them.

So.... He is only for managent and cell balancer?

Here we have the PACK+ and PACK- that comes from general 6S battery pack pins, I want to know if its possible to put my charger output (BQ25750) in the PACK (+/-) and connect my battery in the other side, like this:

It can work? Imean, my system can be supplied by battery and also be charged by charger ?

7 months ago

0 Anthony 7 months ago

TI__Mastermind 28480 points

Hello,

Victor Nunes said:
So.... He is only for managent and cell balancer?

This is correct.

Victor Nunes said:
It can work? Imean, my system can be supplied by battery and also be charged by charger ?

Yes, the charger should be applied to the PACK+/- connection of the system, along with the application the system is intended to supply power too.

Regards,

Anthony

0 Victor Nunes 7 months ago in reply to Anthony

Prodigy 30 points

So... I need to replace the battery input to same part as the BQ25750 OutPut? Right?

0 Anthony 7 months ago in reply to Victor Nunes

TI__Mastermind 28480 points

Hi Victor,

The connection from the bq25750 should be made at VCHOUT point in the previous schematic sent:

Regards,

Anthony

0 Victor Nunes 7 months ago in reply to Anthony

Prodigy 30 points

Thanks! And about the battery connection, should be made in parallel with VCHOUT or as it is in the previous schematic?

0 Anthony 7 months ago in reply to Victor Nunes

TI__Mastermind 28480 points

Hi Victor,

The 6 cells should be made in connection to VC1 - VC6. The bq40z80EVM found below can be used as a reference:

https://www.ti.com/lit/ug/sluubz5/sluubz5.pdf?ts=1738078507846&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FBQ40Z80EVM-020

Regards,

Anthony

Power management

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BQ40Z80: Function questions