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BQ24133: schematic check

GARETH OU
Guru 11365 points
Part Number: BQ24133

HI

1.Could you help check the BQ24133 schematic as below and any need to adjust

2.Q1 can be changed to DIODE? ACDRV and CMSRC be Floating?

PG_PD470.pdf

  • 0
    TI__Genius 10385 points

    Gareth,

    Please review the documents below. Let me know if you have any further questions.

         Best Regards,

    Ricardo

    Schematic and Layout Review

    BQ24133, BQ24170, BQ24172, BQ24172 Schematic Review

    Do I have to use Q1 and Q2 or can I use a host processor to control them instead of the charger’s ACDRV and CMSRC pins?
    If not used, a reverse blocking Schottky diode is highly recommended to prevent the battery from back powering the charger input pins when in battery only/supplement mode. If CMSRC and ACDRV are not used, connect CMSRC to ACN and leave ACDRV floating
  • 0 in reply to Ricardo
    Guru 11365 points

    Hi Ricardo

    would like to ask BQ24133 STAT status. At present, the circuit will use STAT to connect to LED to display the two statuses of battery charging and charging completion. Use BQ24133 EVM to verify that a and b function normally, but the battery is fully charged and STAT is still Low. CE is used to control the EVM. , If there is no MCU to control CE, how do I make STAT be H after charging?

  • 0 in reply to GARETH OU
    TI__Genius 10385 points

    Gareth,

    You have disabled charge termination by pulling TTC to LOW. When termination is disabled, the charger will not terminate autonomously and external circuitry or a host control will need to disabled charging by pulling ISET to LOW.

    Best Regards,

    Ricardo