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  • [FAQ] BQ25173: How should multiple supercapacitors be balanced when charged in series with the BQ25173? BQ25173 BQ25173-Q1

    Resolved
    Part Number: BQ25173 The BQ25173 does not have built-in cell balancing . For series-connected supercapacitors, external balancing resistors placed in parallel across each capacitor are the standard recommended approach. A single-cell supercap (rated…
    • Resolved
    • Answered

  • [FAQ] BQ25173: Can two BQ25173 devices be operated in parallel for higher charge current, and what is the recommended method? BQ25173 BQ25173-Q1

    Resolved
    Part Number: BQ25173 Yes, two BQ25173 devices can be paralleled to increase total output current (up to 1.6 A combined). The recommended method uses a slight offset in the output voltage setpoints between the two devices: one unit is set slightly higher…
    • Resolved
    • Answered

  • [FAQ] BQ25173: Why does the BQ25173 charge a supercapacitor slowly or at reduced current, and how can the maximum charge current be achieved? BQ25173 BQ25173-Q1

    Resolved
    Part Number: BQ25173 Slow charging or reduced current from the BQ25173 is almost always caused by thermal regulation (TREG) . When the supercapacitor starts from 0 V and the input voltage is, say, 5 V, the full input-to-output voltage drop appears across…
    • Resolved

  • BQ25173: BQ25173 Spice Model

    Part Number: BQ25173 Does TI offer a spice model (preferably .lib) of BQ25173 EDLC charger?

  • BQ25173: BQ25173 stat pin signal related problem

    Part Number: BQ25173 A 1Hz blink signal should be generated when the Stat pin is overvoltage or overcurrent, but while a signal is generated during overcurrent, no signal is generated during overvoltage. Therefore, I would like to obtain a BQ25173 EVM…

  • BQ25173: BQ25173 - Issue Slow SuperCap charging

    Part Number: BQ25173 Hi, I am developing an application to charge a supercapacitor that will serve as a backup power supply. The system consists of the BQ25173DSGR integrated circuit, which I am powering with a 4VDC source. The supercapacitor is 3V and…

  • BQ25173: BQ25173 sleep mode vs. CV regulation — implications for supercapacitor lifetime and PG reliability

    Part Number: BQ25173 Other Parts Discussed in Thread: TPS51396A Hi, I'm using a BQ25173 (WSON-8) to charge two 1.5 F / 2.7 V supercapacitors (SCMR22D155PRBB0) in series, supplied from a 5 V buck rail (TPS51396A, actual output range 4.85–5.18 V across…

  • BQ25173: Design check, BQ25173 followed by TPS61022 boost, shorted on first try

    Part Number: BQ25173 Other Parts Discussed in Thread: TPS2116 , MSPM0G3507 , , TPS61022 I have designed this schematic as part of a "SuperCap back up powersupply" for a SBC. The Idea is to power the SBC from main 5V, and use TPS2116 and a comparator,…

  • BQ25173: BQ25173: calculation check for supercap RTC backup

    Part Number: BQ25173 Hello, I am using the BQ25173 to charge a 0.22 F, 3.5 V supercapacitor (NEXCW224Z3.5V10.7X5.5TRF) as a backup supply for a MAX31341C RTC. RTC timekeeping current: ~200–370 nA Minimum timekeeping voltage: 1 V Input to charger…

  • BQ25173: BQ25173 related issues

    Part Number: BQ25173 Hello, The customer uses BQ25173 to charge a supercapacitor with a capacitance of 2F and a voltage of 5.5V. How to configure the VREF and feedback resistor?

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