Frequent Questions

  • [FAQ] BQ2517x: How should the PCB be designed to minimize heating of BQ2517x devices? BQ25171-Q1, BQ25173-Q1, BQ25170, BQ25172, BQ25173, BQ25176J, BQ25176K, BQ25176M, BQ25175

    Part Number: BQ25172 Because the BQ2517x ICs are linear regulators, thermal PCB layout is critical: Exposed thermal pad: Must be soldered to GND with good coverage. Thermal vias: Use multiple vias near/under the IC to connect top-side copper…

  • [FAQ] BQ2517x: Why does the charge current become lower than configured, and what is thermal regulation (TREG)? BQ25171-Q1, BQ25173-Q1, BQ25170, BQ25172, BQ25173, BQ25176J, BQ25176K, BQ25176M, BQ25175

    Part Number: BQ25172 The BQ2517x family are linear (LDO) chargers . Power dissipation = (VIN − VOUT) × IOUT. When this dissipation causes the die temperature to reach ~125°C (TREG threshold), the device automatically reduces output current to prevent…

  • [FAQ] BQ2517x: What is the correct STAT pin behavior and what voltage reference should be used for the STAT pin pull-up? BQ25171-Q1, BQ25173-Q1, BQ25170, BQ25172, BQ25173, BQ25176J, BQ25176K, BQ25176M, BQ25175

    Part Number: BQ25172 STAT pin states (open-drain, active low): Charging in progress: STAT pulled LOW (LED on if pull-up connected) Charge complete / Standby: STAT HIGH (LED off) Fault (VIN OVP, BAT OVP, BAT OCP): STAT blinks at 1Hz Thermal…

  • [FAQ] BQ2517x: Why does the STAT pin behave unexpectedly (always ON or cycling) when no battery is connected? BQ25171-Q1, BQ25173-Q1, BQ25170, BQ25172, BQ25173, BQ25176J, BQ25176K, BQ25176M, BQ25175

    Part Number: BQ25172 When no battery is connected, the BQ2517x family does not have a battery detection feature. Instead, the IC charges the output capacitor toward the BAT OVP threshold, then shuts off. The output capacitor discharges back through…

  • [FAQ] BQ2517x: What causes the STAT pin to blink at 1Hz, and does it continue blinking as long as the fault persists? BQ25171-Q1, BQ25173-Q1, BQ25170, BQ25172, BQ25173, BQ25176J, BQ25176K, BQ25176M, BQ25175

    Part Number: BQ25172 The STAT pin blinks at 1Hz to indicate a fault condition. Fault conditions that trigger 1Hz blinking include: VIN OVP, BAT OVP, BAT OCP, and Open/Short on VSET, ISET, or TMR pins. When no battery is connected, the output capacitor…

  • [FAQ] AM6XX:How to Port SBL UART UNIFLASH for a custom board

    Part Number: AM62x Other Parts Discussed in Thread: UNIFLASH , AM62P The UART UNIFLASH tool provided in the MCU+SDK will only work for TI EVMs out of the box as it is configured according to Flash and DDR part used in a particular EVM, this FAQ provides…

  • [FAQ] USB3.x Resources

    [Click here to return to the INT-TXP USB Homepage] Welcome to the USB3.x E2E Page Listed below are a variety of resources to assist with the implementation of USB3.x! USB3.x Training: Frequently Asked Questions (FAQs):

  • [FAQ] USB2.0/ eUSB2 Resources

    [Click here to return to the INT-TXP USB Homepage] Welcome to the USB2.0/ eUSB2 E2E Page Listed below are a variety of resources to assist with the implementation of USB2.0 & eUSB2! USB2.0 Training: What is a USB Redriver? Layout Basics for…

  • [FAQ] USB Hub Resources

    [Click here to return to the INT-TXP USB Homepage] Welcome to the USB Hubs E2E Page Listed below are a variety of resources to assist with the implementation USB Hubs! USB Hubs Training: Frequently Asked Questions (FAQs):

  • [FAQ] USB Type-C Resources

    [Click here to return to the INT-TXP USB Homepage] Welcome to the USB Type-C E2E Page Listed below are a variety of resources to assist with the implementation USB Type-C! USB Type-C Training: USB Type-C handbook Demystifying the power and…

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