BQ25703A: Regarding the system load and some power rating.

Vinith Nayaka N

Part Number: BQ25703A

Thank you for the response sir,

Is their any change required to be made in the circuit without system load,And one more thing Sir my adapter rating is 15v,2.4A and my battery needs to charged at 11.1V/3.1A will it work fine and I am using esp32 as controller for this...

over 5 years ago

0 Tiger Zhou over 5 years ago

TI__Mastermind 32675 points

No change is required to operate without system load. Looking at the input power and output power, you need 96% efficiency at full load. Our buck-boost charge has the best efficiency especially when the input voltage is close to output voltage level. On the other hand, you make full use of the adapter power, which means you don't have enough margin to handle overload transients.

0 Vinith Nayaka N over 5 years ago in reply to Tiger Zhou

Prodigy 120 points

Thank you for the response Sir,

What is the power consumed by the chip alone in working condition Sir.......

0 Vinith Nayaka N over 5 years ago in reply to Tiger Zhou

Prodigy 120 points

Thank you for the response Sir,

Can i get any solution for checking the presence of the battery and change the resistance accordingly for CELL_BATPREZ.

0 Tiger Zhou over 5 years ago in reply to Vinith Nayaka N

TI__Mastermind 32675 points

the power consumption spec is in the datasheet quiescent current section. You can adjust the resistor divider for different CELL_BATPREZ setting.

0 Vinith Nayaka N over 5 years ago in reply to Tiger Zhou

Prodigy 120 points

Thank you for the response Sir,

Can we change the default address of the IC (is D6h the address)....

0 Tiger Zhou over 5 years ago in reply to Vinith Nayaka N

TI__Mastermind 32675 points

e2e.ti.com/.../919379

0 Vinith Nayaka N over 5 years ago in reply to Tiger Zhou

Prodigy 120 points

Thank you for the response sir,

I have attached my circuit without the host part and

requirements:

1.Input from adapter:15V/2.4A.

2.battery ratings:11.1/6.4A.

3.Charging at a rate of 12.6V/1.240A(The battery has 6 cells in which it is arranged in series and parallel network to get 3s.Each cell rating is 3.67V/3.1A).

Can you please help if there any changes that is required that needs to be done.

Schematic_ganesha_2020-07-03_16-13-03.pdf

0 Kedar Manishankar over 5 years ago in reply to Vinith Nayaka N

TI__Mastermind 24075 points

Hi Vinith,

This is the third post with the same question regarding the schematic. I have already provided all the resources to review the schematic. Please refer to the previous posts. https://e2e.ti.com/support/power-management/f/196/t/920027

0 Vinith Nayaka N over 5 years ago in reply to Tiger Zhou

Prodigy 120 points

Hi,

I have not used any system in my charger design so, what should I do to the vsys pin ,as of now I have connected it to the bat-fet source pin will it work fine.

0 Kedar Manishankar over 5 years ago in reply to Vinith Nayaka N

TI__Mastermind 24075 points

https://e2e.ti.com/support/power-management/f/196/t/920941?tisearch=e2e-sitesearch&keymatch=%20user%3A438626

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BQ25703A: Regarding the system load and some power rating.