BQ24210: what is my success rate by using this design with bq24210C?

ram chinni

Prodigy 245 points

Part Number: BQ24210

My Solar Specifications:

Voc(open circuit voltage) : 6V

Isc(Short circuit current) : 65 Milli Amperes

Battery Specifications:

3.7V

2600 mah

Li-ion/Li-po

It is not possible to change my solar specifications and we are yet to finalise the charging IC. We are about to go with BQ24210 and what are the changes need to be done. What is success rate? Please provide me the sample design details.

over 6 years ago

0 ram chinni over 6 years ago

Prodigy 245 points

Please update on this. My design is on hold please respond as earliest.

0 ram chinni over 6 years ago

Prodigy 245 points

Please suggest the suitable circuit diagram. We are waiting for your valuable updates.

0 Bill Johns over 6 years ago in reply to ram chinni

TI__Guru* 75896 points

Hello
What is the max charging current planned for the battery, this will determine ISET resistor value? Typically a battery can charge at 0.5C to 1C but it will also depend on max current out of the solar cell.
Is an NTC used to monitor battery Temp?
Is the input (VBUS) only a solar cell or will you have option for external adapter also?

0 Bill Johns over 6 years ago in reply to Bill Johns

TI__Guru* 75896 points

Hello
Many solar cells will have a max output current at short circuit current. If this is true for this cell then it will be a problem with this cell, 65mA available for 2600mAh cell. The charge time will be very long, over 40 hours. Also to increase operating voltage to charge then current will be reduced more.
The TS Pin would need to be pulled high to disable safety timers.

0 Bill Johns over 6 years ago in reply to Bill Johns

TI__Guru* 75896 points

Any update on this design?

0 ram chinni over 6 years ago in reply to Bill Johns

Prodigy 245 points

Hi ,

Attached schematics is the final design which is taken from BQ24210 EVM. As we know that input current(Short circuit current) from Solar Panel is less than or Equal to 65mA and Open circuit voltage(VOC) is 5.5V.

What is the RISET value and for the below 65mA input current how much Output current will supply by BQ24210 to recharge Battery.One more thing, While recharge the Battery My Load circuit will run or Not.Please suggest ,How to connect the load with battery .

Regards

Ram

BQ24210_Schematics.pdf

0 ram chinni over 6 years ago in reply to ram chinni

Prodigy 245 points

Hi,s

Please Reply on this.

Regards
RAM

0 Bill Johns over 6 years ago in reply to ram chinni

TI__Guru* 75896 points

As a test platform this looks OK. The challenge will be charging a large battery with a small solar cell.

0 ram chinni over 6 years ago in reply to Bill Johns

Prodigy 245 points

Hi,

thank you and One more thing,while charging the battery, What is My load Circuit status,ON or OFF, Please clarify on this.
can you guide me how to connect this circuit to the Load.

Regards,
Ram

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BQ24210: what is my success rate by using this design with bq24210C?