Search tips
Showing 187 results View by: Thread Post Sort by

  • BQ21040: BQ21040DBVR charger gets stuck on charging state

    TI Thinks Resolved
    Part Number: BQ21040 Other Parts Discussed in Thread: BQ25618 , BQ25628 Tool/software: We are charging 1 li-ion battery, 138mAH with BQ21040DBVR. For an unknown reason, on rare occasions, upon connecting the charger to the battery, when the battery is charged…

  • BQ21040: Request for SPICE Model of BQ21040DBVR and MP2338GTL-P

    TI Thinks Resolved
    Part Number: BQ21040 Tool/software: Dear Texas Instruments Support Team, I hope this message finds you well. I am working on a project that requires the simulation of the BQ21040DBVR and MP2338GTL-P, and I was wondering if you could provide a SPICE model…

  • RE: BQ21040: BQ21040

    Hello, If the thermistor gets too cold and the voltage on TS rises too high you will go into TTDM. Regards, Mike Emanuel

  • BQ21040: Can I use this module with a Wurth Electronics coil (760308101216) for wireless charging?

    Part Number: BQ21040 Other Parts Discussed in Thread: BQ25176M Tool/software: I am designing a product with wireless charging, and I was going to use a module designed specifically for wireless charging, but the price was too high for my product design…

  • BQ21040: Different charging current for different input voltages

    TI Thinks Resolved
    Part Number: BQ21040 Tool/software: Hello All, We are using BQ21040 to charge LiPo battery with charging current of 150 mA from a input supply of 5V. The resistor value of 3.6K was chosen for that. Ts terminal was connected to 10K resistor as temperature…

  • BQ21040: Voltage Slew Rate

    TI Thinks Resolved
    Part Number: BQ21040 Tool/software: Hi team, How much is the slew rate of voltage ramp when CC mode? (when VIN = 0V to 5V) REgards, Hayashi

  • BQ21040: Do the SNAGU solder balls on BQ25155YFPR become lower in height post reflow?

    TI Thinks Resolved
    Part Number: BQ21040 Tool/software: Hi, 1st off, the Part number in the Part Number field is not the Part Number of interest. Entering BQ2155YFPR was not being accepted. I am a mechanical engineer working on a smart ring, and in some spaces even tens…

  • RE: BQ21040: Pre-charge to fast-charge transition threshold

    Hi Stefan, I have confirmed on my EVM that LOWV occurs at 2.5 V battery. Can you please try an ABA swap? If you are in 5V input you will have a large dropout to 1.3 V battery which will put the part in thermal regulation. Can you please check your ISET…

  • BQ21040: CHG Pin Doesn't go Hi-Z at EOC

    TI Thinks Resolved
    Part Number: BQ21040 I was struggling with a different charger IC, so I switched over to the BQ21040DBVR. Right now it is Deadbugged and mod wired in place of the original charger IC. The target is to charge a Sparkfun PRT-13851 battery with a USB connector…

  • BQ21040: Disconnect Load While Charging and Prevent against reverse battery Polarity

    TI Thinks Resolved
    Part Number: BQ21040 Other Parts Discussed in Thread: TPS61288 , CSD13380F3 , , TPS22959 , BQ2980 Hello, I am very new to this, but would like to get your help and build up my knowledge. My Application is to make portable escape room puzzles that has on…

Didn't find what you are looking for? Post a new question.