BQ4050: BQ4050 help check schematic

Star Xu

Part Number: BQ4050
Other Parts Discussed in Thread: BQ25672,

Please help check the schematic of BQ25672+BQ4050

If TS1/2/3/4 of BQ4050 is connected with 10K to GND, will the leakage current increase? Because there is a built-in 18K pull-up resistor.

Waiting for your reply.

Thanks

Star

5 months ago

0 Anthony Baldino 5 months ago

TI__Genius 13425 points

Hi Star,

Connecting the TS1/2/3/4 to ground through a 10K resistor should not increase the leakage current if the pins are not active. If the pins are active, there will be a very slight increase in current, however the leakage current should not increase.

Regards,

Anthony Baldino

0 Star Xu 5 months ago in reply to Anthony Baldino

TI__Genius 9645 points

Hi Anthony Baldino

Thanks for your reply.

Is there any problem with the schematic?

Thanks

Star

0 Anthony Baldino 5 months ago in reply to Star Xu

TI__Genius 13425 points

Hi Star,

Regarding the NC1/NC2/NC3 pins, I believe these need to be connected to Vss. They are currently left with no connection:

I also believe a net tie component should be added to the 1N battery cell connection:

Image below is from the EVM design:

Current customer schematic:

Regards,

Anthony Baldino

Power management

Power management forum

BQ4050: BQ4050 help check schematic