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The TI E2E™ design support forums will undergo maintenance from July 11 to July 13. If you need design support during this time, open a new support request with our customer support center.



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  • LM5145DESIGN-CALC: Negative output current for IBB Calculator?

    Kei Kuwahara
    Kei Kuwahara
    TI Thinks Resolved
    Part Number: LM5145DESIGN-CALC Other Parts Discussed in Thread: LM5145 Tool/software: Hello team, My customer is using the LM5145 Inverting BUck-Boost Quickstart Calculator. https://www.ti.com/tool/download/SNVR510/01.00.00.00 Can we input negative numbers…
    • 5 months ago
    • Power management
    • Power management forum
  • Answered
  • LM5145DESIGN-CALC: MOSFET loss estimation

    Taketo Sato
    Taketo Sato
    Resolved
    Part Number: LM5145DESIGN-CALC Other Parts Discussed in Thread: LM5145 Hello team, I have a question about LM5145 design calculator. MOSFET loss curve doesn't change when I change Qrr value of Low side FET. Only efficiency curve is changing by the parameter…
    • Resolved
    • over 2 years ago
    • Power management
    • Power management forum
  • Answered
  • LM5145DESIGN-CALC: please help to check the design

    fu zhifang
    fu zhifang
    Resolved
    Part Number: LM5145DESIGN-CALC dear supplier , I am trying to use the LM5145RGYR in our product , please help to check the design if there is any mistake or problem , if you have any question please let me know. I am looking forward to your reply, thank…
    • Resolved
    • over 2 years ago
    • Power management
    • Power management forum
  • Answered
  • LM5145: differences between "LM5145DESIGN-CALC" and "LM5145 Inverting Buck-Boost Quickstart Calculator"

    Robert Finger
    Robert Finger
    Resolved
    Part Number: LM5145 Other Parts Discussed in Thread: , LM25145 , LM5146 Hi, On the LM5145 product page both tools are listed. The Excel sheet looks similar, same input boxes. But when filling the sheets with the same requirements and values, I get large…
    • Resolved
    • over 2 years ago
    • Power management
    • Power management forum
  • Answered
  • LM5145DESIGN-CALC: Pole location and FIX/RESET VALUES button

    Taketo Sato
    Taketo Sato
    Resolved
    Part Number: LM5145DESIGN-CALC Other Parts Discussed in Thread: LM5145-Q1 , LM5146 , LM5145 Hello team, I would like to confirm below two things regarding LM5145DESIGN-CALC excel tool. Compensate pole location Comments of Fp1 and Fp2 in excel tool says…
    • Resolved
    • over 2 years ago
    • Power management
    • Power management forum
  • RE: LV5144: Voltage Rising and Dropping consistently on custom DC-DC Converter

    Timothy Hegarty
    Timothy Hegarty
    https://www.ti.com/tool/LM5145DESIGN-CALC
    • 3 minutes ago
    • Simulation, hardware & system design tools
    • Simulation, hardware & system design tools forum
  • RE: LM5145: My LM5145 board doesn't work.

    Taru Kapoor
    Taru Kapoor
    Hi, I cannot access the link that you have shared since it has been blocked by our IT department. Please share the file here. I would also request you to fill in the design calculator of this device and share it with me: https://www.ti.com/tool/LM5145DESIGN…
    • 1 month ago
    • Power management
    • Power management forum
  • Answered
  • RE: LM5145: My LM5145 board doesn't work.

    Timothy Hegarty
    Timothy Hegarty
    Resolved
    Hi Leng, The schematic looks okay, although the inductor at 3.3uH seems low, possibly giving high ripple current. I recommend completing the quickstart calculator for this device and sending it for review as well. This is very useful to check component…
    • 1 month ago
    • Power management
    • Power management forum
  • RE: LM5146-Q1: Buck convertor schematic review

    Timothy Hegarty
    Timothy Hegarty
    Hi Reed, Please send the schematic PDF and a completed quickstart calculator https://www.ti.com/tool/LM5145DESIGN-CALC (the quickstart is useful to understand the design specs, check component selection, power losses, etc.) Regards, Tim
    • 2 months ago
    • Power management
    • Power management forum
  • Answered
  • LM5145DESIGN-CALC: How can I design in the case of Negative output.

     User 6873862
    User 6873862
    Resolved
    Part Number: LM5145DESIGN-CALC I want to design in the case of negative output using LM5145DESIGN-CALC. However, It seems that it can only be designed in the case of positive output . What should I do? I want to observe the figure of Bode-Prot, in the…
    • Resolved
    • over 3 years ago
    • Power management
    • Power management forum
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