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Frequent questions

  • [FAQ] TPS3840: PFET based disconnect on overvoltage

    Part Number: TPS3840 In case of an overvoltage situation, how can the downstream power tree be disconnected to protect it from such overvoltage? Can reset ICs not only sense the overvoltage but also drive a PFET switch to turn it off?

  • [FAQ] TPS62903: Reasons for Vout variations away from the expected value?

    Part Number: TPS62903 Other Parts Discussed in Thread: TPS62901 , TPS629210-Q1 What are some of the causes of output voltage variations in the TPS62901/2/3 buck converters?

  • [FAQ] TPS62130A: How to use the Power Good (PG) pin?

    Part Number: TPS62130A Other Parts Discussed in Thread: TPS62130 , What is the PG pin used for and what are the differences between the TPS62130 and TPS62130A?

  • [FAQ] BQ25171-Q1: Configuration Pins and Design Questions

    Part Number: BQ25171-Q1 The device can be configured to charge Li-Ion, NiMH and LiFePO using external pins. Can the configuration be changed during operation? Any other things I should note?

  • [FAQ] BQ25890: Why does ICHG reduce when reaching the maximum duty cycle for the BQ25890, BQ25890H, BQ25892, BQ25895, BQ25895M, BQ25896, BQ25898, BQ25898D, BQ24190, BQ24192, BQ24195, BQ24195L, BQ24196, BQ24295, BQ24296, BQ24296M, BQ24259?

    Part Number: BQ25890 The charger is basically a step-down DC-DC (buck) converter. It requires the input voltage to be higher than the output voltage with some headroom for normal operations. The maximum duty cycle specification is one of the factors…

  • [FAQ] BQ25890: Why does ICHG reduce during input voltage DPM (Dynamic Power Management) or the input current DPM for the chargers BQ25890, BQ25890H, BQ25892, BQ25895, BQ25895M, BQ25896, BQ25898, BQ25898D, BQ24190, BQ24192, BQ24195, BQ24195L, BQ24196,...

    Part Number: BQ25890 When the input source is over-loaded, it is either from the current exceeding the IINDPM (Input Current Limit) or from the voltage dropping below VINDPM (Input Voltage Limit). For the current to cause the input source to be…

  • [FAQ] BQ25618: [FAQ] Why does ICHG reduce when reaching the maximum duty cycle for the BQ25618, BQ25618E, BQ25619, BQ25611D, BQ25616, BQ25600, BQ25600D, BQ25601, BQ25601D, BQ25606?

    Part Number: BQ25618 The charger is basically a step-down DC-DC (buck) converter. It requires the input voltage to be higher than the output voltage with some headroom for normal operations. The maximum duty cycle specification is one of the factors…

  • [FAQ] BQ25618: Why does ICHG reduce during the input current DPM (Dynamic Power Management) or the input voltage DPM for the chargers BQ25618, BQ25618E, BQ25619, BQ25611D, BQ25616, BQ25600, BQ25600D, BQ25601, BQ25601D, BQ25606?

    Part Number: BQ25618 When the input source is over-loaded, it is either from the current reaching the IINDPM (Input Current Limit) or from the voltage dropping to the VINDPM (Input Voltage Limit). For the current to cause the input source to be…

  • [FAQ] TPS53353: [FAQ] VFB at Light Load Current vs Heavier Load Current

    Part Number: TPS53353 If using skip mode, a higher VOUT is expected at a light load when compared to a heavier load when the device is operating in CCM. This is not an artifact of the reference voltage (or feedback voltage) changing as a function of load…

  • [FAQ] UCC27282: How to Calculate the Max Operating Frequency of a Half-bridge Gate Driver

    Part Number: UCC27282 The Excel tool linked below will calculate the maximum operating frequency of a gate driver for varying transistor and circuit parameters

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