TPS25750: Schematic review

Jimmy Lai

Part Number: TPS25750
Other Parts Discussed in Thread: BQ25792

Dear Team,

Our customer use TPS25750+BQ25792 in their new project.

Could you share your comments about schematic as below?

Thanks a lot!

Many Thanks,

Jimmy

+1 Chuck Branch over 4 years ago

Please add pull up resistors to I2Cs_IRQ and I2Cm_IRA. This will prevent them from generating interrupts during bootup.
Connect 30, 15, 40 (DRAIN) together, but DO NOT connect them to any other signal. This will cause the part to fail
Make sure that the I2Cm_SCL and I2Cm_SDA pins are pulled high with 4.7 K resistors and connected to the SCL and SDA pins of the charger. The charger connection is not connected correctly. The I2Cs_SCL and I2Cs_SDA pins should be connected to the CPU/MCU. They should also be pulled up to LDO_3V3 through a 4.7k resistors.
The TPS25750 has commands that will allow the CPU to access all of the BQ24792 registers from the I2Cs bus.

If you would like me to assign this to the BQ charger team to review the BQ schematic, I am happy to pass it along.

0 Jimmy Lai over 4 years ago in reply to Chuck Branch

Hi Chuck,

Thanks for your great support!

Yes! Could you help me to assign this to the BQ charger team to review the BQ schematic?

BR,

Jimmy

0 Michael Emanuel35 over 4 years ago in reply to Jimmy Lai

Dear Jimmy,

1. I would bias the TS pin more solidly between the T2 and T3 regions for normal operation.

2. Do you plan on using the ShipFET? The TPS25750 firmware does not support the ShipFET. Please explain the external FETs on the BAT pins.

Thanks,

Mike Emanuel

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