• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 530 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.

How to connect bq51050b to Battery in operation

Jean Guerin
Prodigy 10 points
Other Parts Discussed in Thread: TPS783, BQ51050B

Hello,

Context:

Please find attached my schematic of my power management board.

On my board through pads, I connect a receiver Coil (COIL_PAD1 & COIL_PAD2), my battery (BAT+_PAD & BAT-_PAD), my "MCU board" (not display here)(GND_B_PAD & VOUT_B_PAD) and take a measure point MEASURE_ADC_PAD.

I use a LDO (TPS783 3v) for power regulation to my "MCU board", a bq51050b and a LiPo battery of 250 mAh with no distinct wire for charge and supply.

Question:

On one hand you say that bq51050 is able to manage battery on its own. On the other hand, I have been told that I must disconnect the end charge, or add a switching component, during loading phase. I am ok to disconnect the MCU board during battery rechargement. How can I connect the bq51050b? Do I need to add an extra component? Which one?

Thanks in advance for you help,

Best,

JG2526.PCB vSept.pdf

  • 0
    TI__Expert 7730 points
    BAT pin of bq51050 can be connected directly to both your battery and LDO. So you can just connect your BAT+_PAD and the EN pin of LDO together to BAT pin of bq51050. The IC has a linear charger integrated and the BAT pin can deliver current to battery and system output directly.

    Thanks,
    Wenjia