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Frequent questions

  • [FAQ] TPS23755: What is the benefit of Primary Side Regulation (PSR)?

    Part Number: TPS23755 What is the benefit of Primary Side Regulation (PSR)?

  • [FAQ] Why is high efficiency important in PoE applications?

    Why is high efficiency important in PoE applications?

  • [FAQ] TPS23754: Can I use 24V PoE in my PD application?

    Part Number: TPS23754 Can I use 24V PoE in my PD application?

  • [FAQ] TPS23751: Can APD pin left floating on my PoE PD controller?

    Part Number: TPS23751 Hi Darwin, For all of TI's PoE PDs, even if there is an internal pull down on APD, it is recommended and good practice to terminate this pin to RTN or ARTN if APD is not used. This is also described in the PoE PD's datasheet.

  • [FAQ] TPS2372: What kind of MPS (maintain power signature) feature does my PoE PD application need?

    Part Number: TPS2372 Other Parts Discussed in Thread: TPS2373 , , TPS23752 Hi Darwin, In general, a PD can meet MPS by supplying at least 0.5W to the PSE (usually meets the MPS spec by the load going into normal operation). We have one family of…

  • [FAQ] TPS2372: What is the TPH, TPL, BT code when connected to an AT PSE, AF PSE or BT PSE, or a POE++ PSE, or an Adapter?

    Part Number: TPS2372 The table below shows the TPH-TPL-BT state when connected to an AT PSE (Type 1 or Type 2) or AF PSE (Type 1) , BT PSE (Type 3 or 4), non-standard POE++ PSE, or adapter (when APD goes high). PSE Type Power Sourced from…

  • [FAQ] TPS23861: Reset rise/fall timing spec. of reset pin (PoE PSE Startup Guidelines)

    Part Number: TPS23861 Hello Does TPS28861 have any rise/fall timing specification of reset pin? Thank you. BR Patrick

  • [FAQ] PoE PD Controllers: Operation above 57V

    Part Number: TPS2375 Hi, Does TPS2375 have over voltage protection? If no, when VDD goes to above 57V, what is the operation of TPS2375? Is it turned off? If yes, can I call it over voltage protection? Thanks.

  • [FAQ] BQ24040 and BQ2404X family Charge Complete Pin Behavior, /CHG

    Other Parts Discussed in Thread: BQ24090 , BQ25100 , BQ21040 , BQ24050 , BQ24040 The BQ2404X family of charger has a charge complete pin, /CHG to indicate charge in progress or complete. But under some conditions the battery charge has stopped (no current…

  • [FAQ] LP8860-Q1: Combined Output Operation and Diagnostics

    Part Number: LP8860-Q1 Hello, Background: LP8860-Q1 is operated with all outputs (OUT1 - OUT4) shorted together to maximize LED current up to 600 mA. 8 LEDs are operated in series with Vf between 2.75V and 3.5V for each LED. Questions: 1) What…

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