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  • BQ24070: BQ24070 Slow charge issue

    Part Number: BQ24070 Tool/software: Hi, We are currently implementing a BQ24070 Linear Charger in an IoT based application. we have tested both 1.5K , 1k and 750 Ohms for the ISET1 value. According to the calculations , charge current should've been…
    • Answered

  • BQ24070: BQ24070 TS Pin doubt

    Resolved
    Part Number: BQ24070 Tool/software: Hi, I am currently using BQ24070 for an IoT device application. There is TS pin that is used to monitor the NTC temp of the battery. If we are not using the TS pin in our application, can it be left floating? or should…
    • Resolved
    • Answered

  • BQ24070: Excessive Current Draw on the OUT Pins during board power up

    Resolved
    Part Number: BQ24070 Tool/software: Hi Garrett, Another follow up question to the foggy issue we sometimes have here....however this time we discovered a definite issue and I'm wondering if/how it impacts the BQ24070. In our system there is a power…
    • Resolved

  • BQ24070: The chip thinks there is a battery connected and in fast charge mode (According to STAT bits) even when no battery is connected. More insights .... and ISET1 may be damaged?

    Part Number: BQ24070 Tool/software: Hi Garrett, This is a follow up to my previous thread. I still have the original board with the fault. Now we are bringing up pre-production units and and now I've seen this problem appear in one of those...so a red…
    • Answered

  • BQ24070: The chip thinks there is a battery connected and in fast charge mode (According to STAT bits) even when no battery is connected. Am I missing something?

    Resolved
    Part Number: BQ24070 Tool/software: Hello! This design has been fully tested and now we are in pre-production mode. One particular board had the charger working, but something changed and I'm trying to exhaust all possibilities before concluding that…
    • Resolved
    • Answered

  • BQ24070: Charging chip not charging...

    Resolved
    Part Number: BQ24070 We're using the above design in our design. During load testing I discovered that the battery wasnt actually charging. Stat1/2 PG is read by a micro controller and some GPIO based LEDs are currently relaying the status during…
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  • BQ24070: Detailed Operation of Current Limiting, DPPM

    Resolved
    Part Number: BQ24070 Hi again Garrett, I have a question about DPPM as it relates to current limiting and prevention of damage to the BQ24070. In our design, the battery is a single 18650 Li-Ion cell and the chip is powered by a 5V output AC to DC wall…
    • Resolved
    • Answered

  • BQ24070: Question re polarity protection on BAT Pins

    Resolved
    Part Number: BQ24070 Hello! We're planning to use the BQ24070 to charge a single 18650 Li-ion battery...As you know these batteries look like an overgrown AA cell...the battery in the product can be replaced by the end-user. We are going to use a 5V…
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    • Answered

  • BQ24070: Introduced a switch between the OUT pins and the load which is time delayed from the startup of VIN; How long is enough?

    Resolved
    Part Number: BQ24070 Hi Garrett, One more question! For the case of: - no battery present. - there is a load connected to the OUT pins. - the device is powered off. - 10nF cap on DPPM As we've discussed, when the 5V is turned on to VIN, the BQ24070 will think…
    • Resolved

  • BQ24070: Is not fast charging

    Part Number: BQ24070 I built the circuit you see in the schematic Input is 5.25V using the power supply, output voltage is 4.15 V and connected to another PCB I designed. Vbat is 4.05 V . When I connect a Li-Ion battery to this circuit, I see that…

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