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  • BQ25120A: Misleading statement about TS function of BQ25120A

    Resolved
    Part Number: BQ25120A Hi! Our development board uses BQ25120A for battery management. In the datasheet section 10.2.2.1 Default Settings, there is a statement: • If the function is not needed, connect TS to the center tab of the resistor divider…
    • Resolved

  • BQ25120A: BQ25120A VBMON_READ bit always returns 0x00 after trigger

    Part Number: BQ25120A Hello TI Team, I’m using BQ25120A PMIC on a custom board for battery management. I’m trying to read the voltage-based battery monitor (VBMON) by setting bit7 ( VBMON_READ = 1 ) of register 0x0A , waiting 2–5 ms, and then reading…

  • BQ25120A: Config with I2C only

    TI Thinks Resolved
    Part Number: BQ25120A Battery charge team, Can the BQ25120A be used with the following pins simply tied high or low? The only connection to the MCU host will be on the I2C pins. These pins: CD, INT, RESET, and LSCTRL Thanks, Darren

  • BQ25120A: BQ25120A: SYS rail randomly powers up at 3.2 V instead of 1.8 V (not caused by I²C pull-ups, FW/software, or 3.3 V logic backfeeding)

    Part Number: BQ25120A Other Parts Discussed in Thread: BQ25125 , BQ25121A , BQ25122 Hello TI Team, I am facing an intermittent and increasingly problematic issue with the BQ25120A SYS output rail. According to the datasheet and OTP defaults, SYS should…
    • Answered

  • BQ25120A: PMID voltage around 0.75V

    Resolved
    Part Number: BQ25120A Hello, I'm bringing-up a new design using the bq25120A and it's not working. Two things I notice: 1. PMID and VSYS are only 0.75V 2. /MR voltage is variable, wandering between 0.2-1.7V I'm suspecting poor soldering but wanted to…
    • Resolved
    • Answered

  • BQ25120A: Does bq25120a require capacitors for PMID, VINLS, LS/LDO if these outputs aren't used?

    Resolved
    Part Number: BQ25120A Tool/software: Hello! Our schematic uses SYS output only. PMID and LS/LDO aren't used. Can we remove the capacitors for PMID, LS/LDO, and VINLS pins from the schematic? Kind regards, L
    • Resolved
    • Answered

  • BQ25120A: Status is switching between charging/done with no battery connected

    Resolved
    Part Number: BQ25120A Hello, We have a devboard with BQ25120A. No battery is connected. The board's MCU continuously reads the status register in a loop and outputs it via UART. We have noticed the STAT bits alternate between 01 and 10, meaning the…
    • Resolved

  • BQ25120A: No Output Voltage on BAT Pin Despite 5.2V VBUS

    TI Thinks Resolved
    Part Number: BQ25120A We are using the BQ25120AYFPR in our wearable product for single-cell Li-ion battery management. We are currently encountering an issue where the BAT pin does not show any output voltage, even though VBUS is a stable 5.2V. Background…

  • BQ25120A: Falling Vin Voltage

    TI Thinks Resolved
    Part Number: BQ25120A Tool/software: What is the expected behavior of the device if I have a falling VIN voltage with a battery connected? I have two VIN sources that will go from 5V to 0V in ~20s and ~3s ie very slow discharge

  • BQ25120A: Sys out increases to VBAT-threshold

    Part Number: BQ25120A Tool/software: I am struggling to get the sys out to work properly, I want the default 1.8V and it seems to create this for a small period before the voltage suddenly increases to 2.5V (VIN not connected) or 3.6v (VIN connected)…

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