TPS25750: Schematic Review with BQ25713

6145095

Prodigy 105 points

Part Number: TPS25750
Other Parts Discussed in Thread: BQ25713,

Hi,

Could you please review my schematic with the BQ25713 charger?

I'm using them in this mode:

The BQ25713 is connected to an 1S2P battery.

over 3 years ago

0 Chuck Branch over 3 years ago

TI__Mastermind 25820 points

I see two issues with the TPS25750 configuration.

pin10 \i2cs_irq and pin 18 \i2cm_irq should be pulled up to LDO_3V3. This will prevent any IRQ from being triggered before the part has booted.

I do not see any issue with BQ25713, but I do not directly support that part. I suggest that you submit the same schematic to the BQ25713 team for further review by them

0 6145095 over 3 years ago in reply to Chuck Branch

Prodigy 105 points

Thanks Chuck.

Please update the TPS25750 datasheet that currently states "Tie to ground if unused" for the I2C IRQ pins.

0 Chuck Branch over 3 years ago in reply to 6145095

TI__Mastermind 25820 points

I have that in process now.

0 6145095 over 3 years ago in reply to Chuck Branch

Prodigy 105 points

Since the BQ25792 is available now, would you suggest to use that instead of the BQ25713?

0 6145095 over 3 years ago in reply to 6145095

Prodigy 105 points

I also have a question regarding the Integrated USB Type-C® power delivery (PD) and charging reference design for 2-4 cell batteries" ref design.

Why are these regulators on the schematic when the VIN_3V3 net can be tied directly to LDO_3V3?

Another thing I noticed was the ref design grounded pin 10 and 18 on the TPS25750. Is that incorrect?

0 Chuck Branch over 3 years ago in reply to 6145095

TI__Mastermind 25820 points

I have another customer design that currently has an issue with having I2Cm_IRQ causing boot issues. This is a single design with multiple other designs not having the same issue. While I complete this debug, I am suggesting that all customers pull I2Cm_IRQ and I2Cs_IRQ high because this will not impact any other system performance and may resolve a potential future issue.

Many other designs to not see this issue, so I am suggesting the change as an abundance of caution.

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TPS25750: Schematic Review with BQ25713