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  • LM5155-Q1: what happen if LM5155-Q1 FB open?

    TI Thinks Resolved
    Part Number: LM5155-Q1 Other Parts Discussed in Thread: LM5155 Hi expert, Could you pls help share what happen if the LM5155 FB open at Sepic circuit? and pls provide the Pin FMEA doc, thanks. BR, Hangjie

  • LM5155: LM5155 Flyback Design – Low Ripple (<10 mVpp) and EMI/EMC Feasibility

    TI Thinks Resolved
    Part Number: LM5155 Hello Team, We are planning to use the LM5155 IC in our design with a flyback topology and would like to validate its suitability for our requirements. Design specifications: Input voltage: 10 V to 15 V (isolated input) …

  • LM5155: LM5155-Based Boost Converter Showing ~100V Drop at Output Under 20-40mA Load

    Part Number: LM5155 Hello TI Team, We are using the LM5155 and are encountering an output voltage drop issue under load conditions. Design Details: Output Voltage: 200V Load Current: 20–30 mA We tested the design with a resistive load of…

  • LM5155: PMP22155 / LM5155, proper layout of AGND and PGND?

    Part Number: LM5155 Other Parts Discussed in Thread: PMP22155 Hi, I've been looking over the design information for the LM5155, and would like to know the importance of seperating AGND and PGND. I see the datasheet requests a ground pour that connects…

  • LM5155: LM5155/LM5156 Circuit doesn't handle load

    Part Number: LM5155 Other Parts Discussed in Thread: LM5156 I built a circuit with the LM5155. Input voltage is 9V-21V. Output voltage is 55V. Max load current is 3A. The trouble is the output voltage drops at high load current. We found that by using…

  • LM5155: Is the TINA-TI model of LM5155 artificially limited to 300V output?

    TI Thinks Resolved
    Part Number: LM5155 Other Parts Discussed in Thread: LM5156 , TINA-TI There are few questions in the forum about LM5155/LM5156 and the maximum output voltage. The product pages say 300V and there is no mention of this limit in the datasheet. In the…

  • LM5155: LM5155/56 Flyback Controller Calculation sheet verification

    Part Number: LM5155 Hello, HelloI want to make 200V ,10-30mA max from battery with minimum 3V operating worst case. Hello, I already discussed few things with below link: https://e2e.ti.com/support/power-management-group/power-management/f/power…

  • LM5155: LM5155 Boost Output to 200V+/-10%

    TI Thinks Resolved
    Part Number: LM5155 Tool/software: Hello, I want to design a circuit using this LM5155 which will get power from Lithium Battery but as the minimum input voltage is only 3.5V so requesting you to provide part which can support minimum 2.5V input and…
    • Answered

  • LM5155: Replacement for opto coupler while using LM5155

    Resolved
    Part Number: LM5155 Tool/software: Hi, I am using LM5155 driver for isolated flyback transformer. In reference designs optocoupler is recommended for isolated feedback. But we have a requirement of system lifetime 15years. As photocoupler has less lifetime…
    • Resolved

  • LM5155: webench simulation fails

    TI Thinks Resolved
    Part Number: LM5155 Hi Whenever I try to do a simulation on Webench with the LM5155, it just says simulation failed. For example webench.ti.com/.../SD2.cgi

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