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Linux/BQ25892: Boost mode problem

praveen TN
Prodigy 10 points
Part Number: BQ25892
Other Parts Discussed in Thread: LP5562

Tool/software: Linux

Hai sir,

Here i'm using bq25892 IC Battery charger with bq27542 fuel gauge driver and LP5562 LED driver.. In bq25892 IC i want to control the boost mode operation . Here i got 5.1V in VBUS with help of boost mode but according to my project i want to enable/disable the boost mode.. Here I tried all possible which is given in data sheet. can you please suggest the proper steps to enable/disable the boost operation.

  • 0
    TI__Guru*** 143980 points

    Hello,

    To enter boost mode, the following must be true:

    1.  BAT above BATLOWV

    2. VBUS less than BAT+VSLEEP (i.e. no input power attached at VBUS)

    3. Boost mode operation is enabled (OTG pin HIGH and OTG_CONFIG bit =1)

    4. Voltage at TS (thermistor) pin is within range configured by Boost Mode Temperature Monitor as configured

    by BHOT and BCOLD bits

    5. After 30 ms delay from boost mode enable

    If 1, 2 and 4 are turn, then you can enable/disable with either the OTG pin or OTG_CONFIG bit mentioned in 3.  Keep in mind per 5, there will be a delay from the time the OTG pin or bit goes high and the regulated voltage appears at VBUS.

    Regards,

    Jeff