• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 63 subscribers
  • Views 878 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.

BQ24160RGET- CD Pin Toggling & Power up sequence

Parthiban R
Prodigy 130 points
Other Parts Discussed in Thread: BQ24160

Hi,

  I am using BQ24160RGET IC communicating with Host. I have pulled CD(Chip Disable) pin to low in Hardware. But in Datasheet Page no:17 it is mentioned that  "Once a battery is connected and passes battery detection, a new charge cycle begins.Once the battery is applied, the HZMODE bit or CD pin must be toggled before writing the BATREG to a higher voltage and beginning a new charge cycle." 

What if i toggle CE Bit in control register via SW, instead of toggling this CD pin. Will this work for my hardware to start new charge cycle? and also is there any power up sequence to be followed for this BQ24160RGET?

 

  • 0
    TI__Guru**** 166106 points
    The toggling of /CD pin or HiZ bit is required if you plan to hotplug batteries while input power is applied. If you are already in HiZ mode (in other words, no input power power, /CD pin low, or HiZ bit high) when attaching a battery, no pin/bit toggle is required. Unfortunately, toggling the /CE bit does not reset the state machine.
  • 0 in reply to Jeff F
    Prodigy 130 points

    Hi Jeff,

    Thanks for your reply. In our application, we are not supporting battery hotplug.

    In my design we are planning for the below sequence for configuring the charger IC, please can you check if this is the correct method.

    Note: /CD pin is pulled low by default in hardware

    1. Input power connected.

    2. Host establishes I2C interface

    3. Host disables charging by using /CE bit (setting to "1")

    4. Host configures the charger IC with new Vbatreg voltage = 4.2V, charging current to 550mA, safety timer value, watch dog reset intervals..etc

    5. Host enables charging by using /CE bit (clearing to "0")

    6. While operation if any fault reported, planning to clear the /CE bit for restarting the charging.

    Thanks,

    Parthiban.

  • 0 in reply to Parthiban R
    TI__Guru**** 166106 points
    As long as the battery is connected to BAT before input power is connected, this should work.
  • 0 in reply to Jeff F
    Prodigy 130 points

    Hi Jeff,

         Thanks for your reply. I will check this and come back to you.

    Best Regards,

    Parthiban

  • 0 in reply to Parthiban R
    Prodigy 130 points
    Hi Jeff,
    When i am using HZ_MODE bit in the control register to disable or enable the high impedance
    mode. How can i control this for disabling BQ24160 from HI-Z state using I2C. Is I2C will be enabled in BQ24160? . Kindly reply to this. Thanks in Advance!!

    Regards,
    Parthiban R