Search tips
Showing 52 results View by: Thread Post Sort by

  • WEBENCH® Tools/TPS54140A: TPS54140A error in feedback resistor

    TI Thinks Resolved
    Part Number: TPS54140A Tool/software: WEBENCH® Design Tools Hi team, I am using webench to design power from below specs, Vin=10.8-28V, Vo=5V/1A, the feedback resistor is 56.2k//10k. For internal voltage reference is 0.8V, I think the resistor should…
    • Answered

  • TPS54140A: Thermal resistance for four-layers board

    Resolved
    Part Number: TPS54140A Other Parts Discussed in Thread: LMR33620 , Hi, My customer requests the thermal resistance on the four-layers board condition. Does anyone have it? Best Regards, Kuramochi
    • Resolved
    • Answered

  • TPS54140A: About the absolute rating of the EN terminal

    Resolved
    Part Number: TPS54140A Dear TI Team When I carried out WEBENCH under the following conditions, the following circuit came out. Vin = 4.75-32V Vout = 3.75V Iout = 1.5A At this time, if you check the voltage applied to the EN terminal from the voltage…
    • Resolved
    • Answered

  • TPS54140A: Evaluation board

    Resolved
    Part Number: TPS54140A Other Parts Discussed in Thread: TPS54140EVM-429 , , TPS54140 Hi Is it enough to evaluate TPS54140A using TPS54140EVM-429? Because there is no EVM for TPS54140A. BestRegards
    • Resolved

  • TPS54140A: TPS54140A in 12V Batt Charger - light load start-up issue at low drop out

    TI Thinks Resolved
    Part Number: TPS54140A Other Parts Discussed in Thread: TPS54341 Dear Forum, My assigned customer has found some early field failures at minimum input voltage (10.8V), due to the device not starting up properly with their 60mA minimum load. As Vout…
    • Answered

  • TINA/Spice/TPS54140A: TPS54140A PWRGD IN TINA-TI PULLED TO OUTPUT VOLTAGE PROBLEM

    Resolved
    Part Number: TPS54140A Other Parts Discussed in Thread: TINA-TI , Tool/software: TINA-TI or Spice Models I created a design with TPS54140A in webench and exported in tina-ti. I pulled-up the PWRGD pin to the output voltage (3.3V) but the simulation result…
    • Resolved

  • TPS54140A: Ripple in very small load operation

    Part Number: TPS54140A Other Parts Discussed in Thread: TPS54140 , TPS54160 , TPS54160A I have a ripple problem with TPS54140A in very small load (<50mA). The ripple wavefroms are (1) shown below. So I selected a low inductance to reduce the ripple. …
    • Answered

  • TPS54140A: Current trough inductor used for formula 8 and 9

    Resolved
    Part Number: TPS54140A Hello Can someone tell me which current I can use for formula 8 and 9. Is the inductor current IL the same as the wanted current out? If I would use formula 12 To calculate the current I need the frequency result from formula 8…
    • Resolved

  • TPS54140A: Vout Ripple in case of a small Load (pulse skip mode)

    TI Thinks Resolved
    Part Number: TPS54140A Hi Robert, Thank you for your advice. Here's the lost images about preceding Q&A. This time, I use ".png" files. Because "paste a word data" couldn't be sent normally . Regards, user4778976 [Circuit] [Comparison of different inductance…
    • Answered

  • TPS54140A: Vout Ripple in case of a small Load (pulse skip mode)

    Resolved
    Part Number: TPS54140A Other Parts Discussed in Thread: TPS54140 The output of TPS54140A 24->5V circuit shows a large Vout ripple in case of No load. If there exists a load resister for 20mA current , the above ripple disappears. The follows are…
    • Resolved

Didn't find what you are looking for? Post a new question.