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  • BQ24620: LiFePO4 UPS Design with BQ24620, BQ34Z100, and BQ76942

    Resolved
    Part Number: BQ24620 Other Parts Discussed in Thread: BQ34Z100 , BQ76942 Hi I am designing a UPS to supply 5V ~3A and will be using 4S LiFePO4 batteries. I am currently trying to select ICs to fulfil the following purposes: charging, balancing, and fuel…
    • Resolved
    • Answered

  • BQ24620: Struggling to get batteries to charge

    Resolved
    Part Number: BQ24620 Tool/software: I have been working on this since my last post, the schematic is below. This charger is set to charge at 300mA to 14.6 volts. I have a 4S1P pack attached to this charger. The two lines coming in from the left is our…
    • Resolved

  • BQ24620: Charge current significantly lower than calculated ICHARGE

    TI Thinks Resolved
    Part Number: BQ24620 Other Parts Discussed in Thread: , BQ25306 Hi Team, Posting on behalf of our customer. I am evaluating the BQ24620 charger with a series set of 2x 18650 LiFePO4 cells using the BQ24620EVM board. I am having an issue with charge…

  • BQ24620: BQ24620 time fault

    Part Number: BQ24620 Hi I have a query need your help. According to the datasheet, the BQ24620 can exit the timing fault when the VFB voltage is lower than the threshold voltage 0.125V after entering the timing fault. During the test, we found that…

  • BQ24620: BQ24620 Icharge query

    TI Thinks Resolved
    Part Number: BQ24620 Other Parts Discussed in Thread: BQ24610 Hi The customer set the Icharge, the problem as below: According to the current formula in the data sheet, the charging current is 800mA and the set voltage is 0.16V. However, the actual…

  • BQ24620: IC acts like it is charging, but no current flows through

    Part Number: BQ24620 Tool/software: I have been working on a 4S1P charger for LiFePO4 batteries (14.6V) and have assembled a circuit with the use of the excel calculator. when the device is connected and powered up, either the STAT LED blinks indicating…
    • Answered

  • BQ24620: Single cell LiFePO4 charger recommendation

    Resolved
    Part Number: BQ24620 Tool/software: Hello, I am searching for a charger that is capable of charging a single cell LiFePO4 battery (Narada FE100A 3.2V 100Ah LiFePO4 Battery) from a 5V source. The charger should function on its own. And the charge time…
    • Resolved

  • BQ24620: Timer failure and charging current setting

    Part Number: BQ24620 Hi Team, Q1: Timer failure The document describes that if the battery is not fully charged for 5 hours, it will enter the timer fault state. If CE is enabled or the value is less than the threshold, the timer fault state can be…
    • Answered

  • BQ24620: BQ24620 Damaged During Battery Connection

    Resolved
    Part Number: BQ24620 Other Parts Discussed in Thread: BQ76PL536A Occasionally, when I connect my battery to my board, the BQ24620 IC is damaged. Once I observed a hole in the broken IC. A second time the SRN pin was destroyed. I am using a 6S 1Ah LiPo…
    • Resolved

  • BQ24620: VBAT difference depending on the ADAPTER voltage

    TI Thinks Resolved
    Part Number: BQ24620 Hello Ti experts, I am using the BQ24620 with AC-DC adapter 19V and 24V. I wonder why VBAT voltage is different depending on adapter voltage. According to Equation 1, I designed the VBAT = 16.8V (R2 = 1M, R1 = 120k) …

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