• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 254 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ24075: Change level of output current level of BQ24075(T) as system (load ) current needs changes

can ates
Prodigy 30 points
Part Number: BQ24075

Hello supporter,

In the application circuit of the BQ24075T, when the fast charge current level is adjusted 1.2A with Rıset and the input current level is adjusted 1.5A with Rılım, the remaining part of the current is transfered into the system during adapter is connected to IN pin of the BQ24075T. So, when the system current need increases during this operation, where will be the extra needed current drawn from? 

As brief, BQ24075 has a mechanism that when need of the system current level  increases, this needed current(in order to meet this current level ) will  be drawn from directly adapter and fast charger current level will be decreased, OR need of the system current can not be supplied from adapter during charging process is active(while adapter is connected)

Thanks for attention to question. Cocktail

  • +1
    TI__Mastermind 23410 points

    Hi,

    For the BQ24075T, if the device has been set to charge a battery with 1.2A and an input current limit of 1.5A, it is correct the remaining current will be provided to the system at the OUT pin.

    If the system at the OUT pin were to require more current, the charge current will begin to decrease to maintain the voltage and current needed at the output. For more information and diagrams, you can refer to the datasheet and find more in the section 9.3.4.1.2 DPPM Mode and also 9.3.4.1.3 Battery Supplement Mode

    Best Regards,

    Anthony Pham

  • 0 in reply to Anthony P Pham
    Prodigy 30 points

    Thanks your answer. I have one more question about battery charging. When BQ24075 is used, the battery charge operation will automatically be stopped as the battery is full? And how can be understand? thank you from now ;D

  • 0 in reply to can ates
    TI__Mastermind 23410 points

    Hi,

    can ates said:
    the battery charge operation will automatically be stopped as the battery is full

    Yes! The device is always measuring the voltage at the BAT pin. Based on the voltage, the device will operate in the corresponding charge phase. Once the device says the battery is done charging, the /CHG pin will be high impedance and you'll see that the charge current is 0 A into the battery. If the battery falls under the recharge threshold, it will charge it again. 

    You can find this information in the datasheet in section 9.3.4 Battery Charging.

    Best Regards,

    Anthony Pham