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  • BQ2970: Not turning on Q1 and Q2

    Part Number: BQ2970 Hello, We are trying to get a new board working where the battery is discharging to the load. We do not see Q1 turn on and the voltage on Dout with respect to the battery negative is 0 volts. Is there anything we should look…

  • BQ2970: 0V charge feature does NOT support 0V charging?

    Part Number: BQ2970 Using a BQ29728DSER in a sealed design, discovering that parts left on the shelf for ~2-3months fully discharge to 0V. So, possible leakage after 2.8V cutoff? But more importantly, cannot recover. Careful reading of 0V charging feature…

  • BQ2970: Reverse Polarity protection using BQ29707 in 1s2p battery pack configuration

    Part Number: BQ2970 Hi, I am planning to design a 1s2p battery pack protection circuit using BQ29707DSER and two back-back NMOS. It works fine when only one chip is used. But for reverse polarity protection design requirement - like one cell is inserted…

  • BQ2970: BQ29700DSER – Device Not Recovering from UVP After Charger Connection

    Part Number: BQ2970 Dear TI Support, I am using the BQ29700DSER in a single-cell Li-ion protection design with external back-to-back MOSFETs. I observed unexpected recovery behavior after the protection MOSFETs are disabled. If the battery voltage…

  • BQ2970: BQ2970

    TI Thinks Resolved
    Part Number: BQ2970 Other Parts Discussed in Thread: TPS63900 , TMP303 Tool/software: Hello, We need to certify our design as intrinsic safe design. Battery will not be charged Can you please review the flow, so we can proceed with schematics? Requirements…

  • BQ2970: Help analyze whether the BQ29702 in the following circuit can turn on the external MOSFET

    TI Thinks Resolved
    Part Number: BQ2970 SCH is in the attach file.The Charge IN+ and Charge IN GND on the left are the outputs of the charging module. The battery is properly installed on the right with a normal voltage of 4V and sufficient power. Please analyze whether…

  • BQ2970: understanding the application note

    Part Number: BQ2970 Other Parts Discussed in Thread: TIDA-00881 Can anyone tell me what is a purpose of this R20-820mOhm Resisotor in BQ29707 battery protection IC? I have taken this reference design from TI App note: TIDA-00881. I am unable to understand…

  • BQ2970: Alternative IC with operating temperature above 100C

    Part Number: BQ2970 I am currently using BQ29707DSER in my battery protection system and its working fine. But issue is my client has requirement of 100C operating temperature for all components. BQ29707DSER has only +85C operating temperature. So I need…

  • BQ2970: Calculation of overcharge/discharge current BQ29707

    Part Number: BQ2970 Hi. I have made a design for BQ29707 for a set of wireless earbuds, low power consumption and calculated the over charging/discharging current to 0.45A (0.09/0.2 where 0.2 is the value of the external sense resistor R182). However…

  • BQ2970: Custom UVP value 3.0V

    TI Thinks Resolved
    Part Number: BQ2970 Other Parts Discussed in Thread: BQ2980 Tool/software: Hi I understand the UVP values can be changed but it needs to be custom made from TI. We have an true wireless earbud project for a customer and discovered way to late that the…

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