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BQ24160A: do not (0V Lock-up) Wake-up when battery protection

TS Yang
Genius 4800 points
Part Number: BQ24160A
Other Parts Discussed in Thread: BQ24171, BQ24160

Dear TI,

I'm using the Charger IC (BQ24160A) circuit as below. I would like to inquire about the TS pin.

It is not easy to understand, but there is an issue that if R83 resistance is arranged more than 10Kohm in the following circuit, it does not wake-up when battery protection (0V lock-up) occurs.

Our battery 3.0V ~ 4.2V, Single-cell 3050mAh is in use.

(Problems arise when the recommended values R83 = 12Kohm and R75 = 5.6Kohm from TI, The current state is as follows: R83 = 1Kohm)

1.inquire whether reference schematic around TS pin is available for each status.
< Battery temperature 0 ~ 60 degrees, 0 ~ 45 degrees >
How to set the resistance value of the red rectangle below to know how to perform charging in the above condition?
(The range of Thermistor inside our battery is 27.28kohm ~ 3.02kohm (0 ~ 60 degrees))

2. Question about the TS status related documents on the datasheet.
It seems that the following two calculation methods are different among TS setting between 0 ~ 60 degrees
Which of the following two calculation methods is the Vhot, Vcold voltage calculation method?

3. As with BQ24171, if you can provide a table of resistance values, please share for us.
(The example below is the calculation table provided when designing BQ24171)

thanks,

TS

  • 0
    TI__Guru**** 166006 points

    3051.bq2416x_DesignHelp_V1.xlsxTS,

    The recommended values are R83=5.6kohm and R75=12kohm not reversed.  Attached is an excel spreadsheet for calculating.

  • 0 in reply to Jeff F
    TI__Intellectual 1900 points

    Jeff,

    Can you check below?

    <problem>

    Though customer tested with new recommended resistor, still there occurred error during chraging at 0V in some case.

    - During charging at 0V, if charger was recognized as SDP then it operate abnormally but if it was recognized as DCP then it operate normally.

    <Question>

    What is the operation difference chipset internally between SDP recognition and CDP/DCP recognition ?

    If the battery is not fully discharged, charging operate  normally even when recognized as SDP.

    But If the battery is fully discharged, charging doesn't operate normally when recognized as SDP.  

  • 0 in reply to Danny Kwon
    TI__Guru**** 166006 points

    Does the thread below answer this question?

  • 0 in reply to Jeff F
    TI__Intellectual 1900 points
    Hi Jeff

    It seems to be different issue.
    Can you check the question again and provide information how the charger operate internally between SDP recognition and CDP/DCP recognition ?
  • 0 in reply to Danny Kwon
    TI__Guru**** 166006 points
    Danny,

    With VBAT=1.5V, V(TS)=2.5V, ILIM=100mA and 5V SDP port at USB, I see IBAT = ISHORT=50mA, which is correct.
    With VBAT=1.5V, V(TS)=2.5V, ILIM=1.5A and 5V DCP port at USB, I see IBAT = ISHORT=50mA, which is correct.
    With VBAT=0, V(TS)=2.5V, ILIM=100mA and 5V SDP port at USB, I see IBAT = ISHORT=50mA, which is correct.
    With VBAT=0V, V(TS)=2.5V, ILIM=1.5A and 5V DCP port at USB, I see IBAT = ISHORT=50mA, which is correct.

    Note that if V(TS) is in the HOT or COLD voltage range, no charging occurs.

    The bq24160 recognizes a DCP port if D+=D-, setting ILIM=1.5A, otherwise the port is recognized as SDP, setting ILIM=100mA.