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Frequent questions

  • [FAQ] BQ25620: How is VSYS regulated for BQ25620/22 and BQ25628/29? What conditions determine how it’s regulated? When is SYSMIN threshold valid?

    Part Number: BQ25620 The BQ2562x family of chargers use the Narrow VDC (NVDC) architecture where system and battery are separated by BATFET. The way VSYS is regulated depends on two key conditions: whether charging is enabled or disabled and whether…

  • [FAQ] Which Battery Applications should I use Non-isolated Gate Drivers For?

    Other Parts Discussed in Thread: TIDA-010216 , UCC27524 , BQ76952 , UCC27517 , UCC27624 , PMP10110 , UCC27714 , PMP21529 , UCC27211A Non-isolated gate drivers are used in battery applications. This will go over multiple different applications, the benefits…

  • [FAQ] How Do I Choose the Best Non-isolated Gate Driver for Electric Vehicle (EV) Charging Station Topologies?

    Electric vehicle (EV) charging systems are of two types: AC and DC. The AC charging system has to interface with the EV's internal on-board charger (OBC) before reaching the battery. The DC charging system interfaces with an external Electric Vehicle…

  • [FAQ] BQ24800: What is the sequence of ACFET/RBFET and BATFET when the adapter is plugged in? What is it when the adapter is unplugged? Can these FETs be on at the same time? What happens if a battery is removed or inserted while an adapter is present...

    Part Number: BQ24800 ACFET/RBFET and BATFET can never be on at the same time, otherwise there would be a short from the adapter input to the battery. The process always starts from ACDET, which cannot be ignored by the controller, although it can be directly…

  • [FAQ] BQ24800: I am using sense resistor values other than 10mΩ to extend the input current range, but the GUI does not display this extended range.

    Part Number: BQ24800 The GUI display is written based on 10mΩ sense resistors, so the IIN_HOST register (0x3F) displays the same setting values regardless of the input sense resistor used. Therefore, the user needs to convert/scale the setting values…

  • [FAQ] BQ24800: Where is the full datasheet for BQ24800?

    Part Number: BQ24800 The full datasheet for BQ24800 currently has to be requested. On the product page ( here ), scroll to "Request more information".

  • [FAQ] BQ27Z746 FAQs

    Other Parts Discussed in Thread: BQ27Z746 BQ27Z746 FAQ Home Page This is the home page for common questions in relation to the BQ27Z746 . FAQs Related FAQ home pages: Impedance Track FAQ home Page What information does TI need to help with…

  • [FAQ] BQ78Z100 FAQs

    Other Parts Discussed in Thread: BQ78Z100 BQ78Z100 FAQ Home Page This is the home page for common questions in relation to the BQ78Z100 . FAQs Related FAQ home pages: Impedance Track FAQ home Page What information does TI need to help with…

  • [FAQ] BQ28Z610 FAQs

    BQ28Z610 FAQ Home Page This is the home page for common questions in relation to the BQ28Z610 and BQ28Z610-R1 . FAQs Related FAQ home pages: Impedance Track FAQ home Page What information does TI need to help with learning/accuracy/operation…

  • [FAQ] BQ25882: How does the BATFET work in the BQ25882, BQ25883, and BQ25886?

    Part Number: BQ25882 Other Parts Discussed in Thread: BQ25883 , BQ25886 There is a BATFET between the system (SYS) and the battery (BAT) in the integrated boost chargers BQ25882, BQ25883, and BQ25886. The BATFET separates the system voltage and the battery…

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