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BQ25601D: About BQ25601D charging IC problem

2018
Expert 2630 points
Part Number: BQ25601D

About BQ25601D charging IC problem
1. Main functions of the USB (D+/D-) interface of BQ25601D charging IC.
2. What are the hidden dangers if BQ25601D D+/ d-suspension? Can it be used normally when plugged into the computer USB for charging?
3. What are the main functions of BQ25601D I2C?
4. Are the charging current and cut-off current configured by I2C?

  • 0
    Expert 2630 points

    About BQ25601D charging IC problem
    1. Main functions of the USB (D+/D-) interface of BQ25601D charging IC.
    2. What are the hidden dangers if BQ25601D D+/ d-suspension? Can it be used normally when plugged into the computer USB for charging?
    3. What are the main functions of BQ25601D I2C?
    4. Are the charging current and cut-off current configured by I2C?

  • 0 in reply to 2018
    TI__Genius 10385 points

    Hello,

    1.  The main function of D+/D- is to identify an adapter as a standard or non-standard USB adapter. Doing this configures the input current limit according to what the maximum power the adapter should be able to deliver. This is discussed in section 9.3.3.3.1 of the datasheet.

    2. . If an adapter is detected as unknown, the input current limit is set at 0.5 A.This discussed on section 9.3.3.3.1 of the datasheet. If you overwrite the input current limit set by D+/D- beyond what the adapter can supply, you run the risk of crashing the adapter. 

    3. All the possible I2C configurations are described in section 9.7 of the datasheet. Key features include, but are not limited to programmable input current limit, VINDPM, BATFET control, CE, and OTG.

    4. Charge current is programmed on REG00[4:0] from 100mA to 3.2A as described in section 9.7.1 of the datasheet. Termination current is programmed on REG03[3:0] as described in section 9.7.4 of the datasheet.

         Thanks,

    Ricardo