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  • WEBENCH® Tools/LM2731: LM2731

    TI Thinks Resolved
    Part Number: LM2731 Tool/software: WEBENCH® Design Tools Same design was run on webench on 2 different dates this year (May and August). August report now produces much worse results. Pd of controller jumps from 18mW to 50mW for exact same design! efficiency…
    • Answered

  • WEBENCH® Tools/LM2731: LM2731 efficiency calculation in WEBENCH

    Resolved
    Part Number: LM2731 Tool/software: WEBENCH® Design Tools Hi Team, When simulating the LM2731 in WEBENCH, the working condition is: Vin= 4-8V, Vout=11V, Iout=30mA, the simulation result shows the efficiency is 91.9%. However, if using LM27313, the simulation…
    • Resolved

  • LM2731: Different results produced by same design for LM2731XMF/NOPB

    Part Number: LM2731 Other Parts Discussed in Thread: TPS61040 , TPS61085 , TPS61087 , TPS61023 , TPS61170 Hi Team, I am posting this on behalf of our customer regarding their situation with the different results in the circuit products by Webench design. Here…
    • Answered

  • LM2731: Vout when SHDN=0V (shutdown functionality)

    Resolved
    Part Number: LM2731 Hi, I've designed a printed circuit board with the typical application circuit of LM2731. It is intended to use Vin=5V and Vout=9V. The values of the external components used are: C1=2.2uF; L1=10uH; D=MBR020L; R1=106k; R2=16k;…
    • Resolved
    • Answered

  • LM2731: adjust the start up time

    Resolved
    Part Number: LM2731 Hello team, I use LM2731 in my design. I want to slow start to reduce inrush current on the power supply when power on, I add RC on the SHDN pin. the R=47k, C=1UF，the input power is 5V, output is 12V,I want to delay ~20ms to start…
    • Resolved
    • Answered

  • WEBENCH® Tools/LM2731: Webench Model for LM2731Y

    Resolved
    Part Number: LM2731 Tool/software: WEBENCH® Design Tools Hi team, Do we have an available model for the LM2731Y (0.6MHz) version? We have a version for the X device, but we would like to model the Y version for transient stability. Thanks, Arthur H.
    • Resolved

  • LM2731: Can SHDN pin do soft-start function?

    TI Thinks Resolved
    Part Number: LM2731 I see SC4503 can do soft-start by connected SHDN pin on external Rss/Css. Can LM2731 do the same thing? https://www.semtech.com/uploads/documents/sc4503.pdf

  • LM2731: How can i remove the over shooting on VOUT

    TI Thinks Resolved
    Part Number: LM2731 Hello everyone, I would like to have some help about the booster LM2731. My voltage input is 3.3V and Vout 7 V. I have a minimal load of 0.01mA. Here is the ripple on the output. I have around 200mV of over shooting on the output…

  • RE: LM2731: Why does the Vout change bigger?

    Hi,Jing I could't understand the method of adjusting the power supply's current limit(such as 2A),Could you explain it again? By the way,If I use a electrolytic capacitor(the value is 100uF）at the output of LM2731 as the schematic as shown…

  • LM2731: Heating/Failing Issues on Start-Up

    Part Number: LM2731 Hello Team, I am working with a customer who is using the LM2731 in their circuit to boost 5Vin to 12Vout. They noticed that they would every now and then have heating issues on their output capacitor, and also have catastrophic failures…

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