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BQ78350: CP_EN pin

Went Cao
Genius 5550 points
Part Number: BQ78350
Other Parts Discussed in Thread: BQ76200

Dear all

       If the CP_EN pin is ununited by others, it is suspend, can the bq76200 device can control to CHARGE PUMP,CHG or DSG by only CHG_EN and DSG_EN pins ? As below Table 1. 

  • 0
    TI__Guru* 81034 points

    Hi Went,

    Yes, you can enable the charge pump using only the CHG_EN and DSG_EN pins. However, there is a disadvantage of additional delay for the FETs if the CP_EN pin is low as stated in the datasheet overview section:

    Note that when either the CHG_EN or DSG_EN is enabled, the charge pump will be automatically enabled even if the CP_EN is in the disable state. It is recommended to enable the charge pump via CP_EN pin during system start-up to avoid adding the tCPON time into the FET switching time during normal operation.

     

    Best regards,

    Matt