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  • LM5117: LM5117 test issue

    TI Thinks Resolved
    Part Number: LM5117 HI SIR There are some problems with testing IC LM5117, please refer to the attachment. TKS LM5117 IC design and measurement issues_20240118.docx

  • LM5117: IC dissipation under different load condition

    TI Thinks Resolved
    Part Number: LM5117 Tool/software: Hi Team, Do you have formula/or tool to help my customer to calculate the power dissipation of IC itself based on the different loading conditions? For example, based on the Webench estimation, IC pd will go higher…

  • LM5117: Adaptive deadtime when outputs are isolated from output FETs

    TI Thinks Resolved
    Part Number: LM5117 Other Parts Discussed in Thread: UCC5304 , Tool/software: How does adaptive deadtime control behave if the SW pin is not galvanically tied to the mid point of the FETs? I am hoping to use opto-gate drivers ( UCC5304) on both outputs…

  • LM5117: maximum time of t_on and t_off

    TI Thinks Resolved
    Part Number: LM5117 Tool/software: I would appreciate your help regarding the times in the attached image. Can the min/ max Duty Cycle be calculated based on these times using the following equations? For example, if I want D=98% and T_sw=5usec…

  • LM5117: LTspice issue regarding unencrypted LM5117 model

    TI Thinks Resolved
    Part Number: LM5117 Hi, I have the same problem regarding the use of the unencrypted LM5117 model. I've used it in microcap and gave the same error about the T (0,0) and when deleting it a singularity error occurs. Therefore, I implement it on the LTspice…

  • LM5117-Q1: output collapses at 8 A (25.2 V design target, input 40–51.4 V)

    TI Thinks Resolved
    Part Number: LM5117-Q1 Other Parts Discussed in Thread: LM5117 Tool/software: My converter is designed for 25.2 V @ 20 A using LM5117 from a 40–51.4 V input. With one MOSFET per switch the board runs fine up to 7 A (output falls slowly from 25.2…

  • LM5117-Q1: TECHNICAL EXPLAINATION REQUIRED FOR SUGGESTED RECOMMENDATION

    Part Number: LM5117-Q1 Tool/software: Hello EricLee Can you please explain the technical reason to me how each of your recommended steps listed below can help in reducing the emissions. Make SW node copper area smaller. Add RC snubber between…

  • LM5117: Simulation error of LM5117 in PSpice for TI

    TI Thinks Resolved
    Part Number: LM5117 I'm trying to simulate the typical circuit for the LM5117 DC-DC synchronous buck converter in PSpice for TI. The simulation does not run properly and it gave an error because of the "transistors and diodes" I was using. Therefore,…

  • LM5117: High Power dissipation state

    TI Thinks Resolved
    Part Number: LM5117 Tool/software: Hello, Regarding the LM5117 Synchronous Buck Controller, I would like a complete definition / more details of : ... the regulator may not start or it may hang up momentarily in a high power dissipation state. Does…

  • LM5117-Q1: Absolute Maximum Ratings of LM5117-Q1

    TI Thinks Resolved
    Part Number: LM5117-Q1 Dear team, I understand that if even a momentary surge is applied to Vin that exceeds the absolute maximum rating, may potentially breaking the device and affect its reliability. But, I would like to confirm the following as the…

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