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BQ25713: BQ25713: what is the difference with ACOC and ACx

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Replies: 7

Views: 92

Part Number: BQ25713

Hi

I want to know the difference with ACOC, ACX,  ACOC and ACx are over current protection, the datasheet did not show the difference.

Thanks

Star

  • Hi Star,

       ACOC is an input overcurrent protection comparator measuring input current across the sense resistor between ACx pins.

    Regards,

    Kedar Manishankar

    Applications Engineer

    Please click "This resolved my issue" button if this post answers your question

    Please check out TI latest fully integrated 1-4 Cell, 5-A Buck-Boost Battery Charger with Dual-Input Selector and USB PD 3.0 OTG Output BQ25790 in WCSP package and BQ25792 in QFN package

  • In reply to Kedar Manishankar:

    Hi Kedar Manishankar

    Thanks for your reply.

    I know ACOC is input over current protection

    Why the datasheet lists ACX voltage separately

    Thanks

    Star

  • In reply to Star Xu:

    Hi, Star,

    As shown in the table, the differences are:

    ACOC has deglitch time, it is related to ILIM2 and can be enabled/disabled by setting. 

    ACX is a fixed protection which is instantaneous and enforced all the time. Two level of settings are possible.

    Both will provide adapter enhanced over current protection. ACOC allows over-load capability, while ACX provides fast-acting protection.

    Regards,

    Tiger Zhou, BCP-BMS, Texas Instruments

    Please check out TI latest fully integrated 1-4 Cell, 5-A Buck-Boost Battery Charger with Dual-Input Selector and USB PD 3.0 OTG Output BQ25790 in WCSP package and BQ25792 in QFN package.

    Please click "This resolved my issue" button if this post answers your question.

  • In reply to Tiger Zhou:

    Hi Tiger,

    Thanks for your reply.

    I have one question more.

    I tried to set ACOC threshold over 180mV and set ACX to 150mV, then increase the load current. I couldn't observed the protection when the voltage between ACP-ACN reaches 150mV. Till it reaches 180mV the ACOC was in effect.

    So I am a little confused about how to make ACX work.

  • In reply to user6200525:

    Typically, we set ACOC threshold lower than ACX.

    Regards,

    Tiger Zhou, BCP-BMS, Texas Instruments

    Please check out TI latest fully integrated 1-4 Cell, 5-A Buck-Boost Battery Charger with Dual-Input Selector and USB PD 3.0 OTG Output BQ25790 in WCSP package and BQ25792 in QFN package.

    Please click "This resolved my issue" button if this post answers your question.

  • In reply to Tiger Zhou:

    Hi Tiger,

    Is it the same protected behavior between ACOC and ACX? 

    If the input current doesn't reach ACOC threshold,the ACX function will be disabled. Do I understan correctly?

  • In reply to user6200525:

    ACOC and ACX are two independent protections. I don't quite understand how you test them. Could you describe in more details?

    Regards,

    Tiger Zhou, BCP-BMS, Texas Instruments

    Please check out TI latest fully integrated 1-4 Cell, 5-A Buck-Boost Battery Charger with Dual-Input Selector and USB PD 3.0 OTG Output BQ25790 in WCSP package and BQ25792 in QFN package.

    Please click "This resolved my issue" button if this post answers your question.

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