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  • LM5155EVM-SEPIC: Use LM5155 to design an output +/- 200 , 0.3A non-isolated power supply

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    Part Number: LM5155EVM-SEPIC Other Parts Discussed in Thread: LM5155 Tool/software: Hi IT Experts, I am going to design a positive and negative output power supply using LM5155 controller such as the following: Input voltage : 9 - 18V Output voltage…
    • Resolved

  • LM5155EVM-SEPIC: Diode Anode Oscillations - Ringing

    Part Number: LM5155EVM-SEPIC Other Parts Discussed in Thread: LM5155 , Tool/software: The same ringing issue mentioned in a previous post was observed in our LM5155 SEPIC design. We installed a snubber network in parallel with the output diode as described…
    • Answered

  • LM5155EVM-SEPIC: What to consider when LM5155EVM-SEPIC choosing switching frequency?

    Resolved
    Part Number: LM5155EVM-SEPIC As we can see on the user's guide. The switching frequency is 2.2MHz, In the datasheet, the frequency can be 100kHz or 2.2MHz. I want to know why does EVM choose this 2.2MHz? Is there any benefit or limitation of EVM…
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    • Answered

  • LM5155EVM-SEPIC: Can LM5155 on LM5155EVM-SEPIC be replaced with LM5156?

    Resolved
    Part Number: LM5155EVM-SEPIC Other Parts Discussed in Thread: LM5155 , , LM5156 Hello guys, One of my customers is evaluating LM5155 using LM5155EVM-SEPIC. But they knew recently that it is difficult to get LM5155 by their mass-production start dead…
    • Resolved

  • LM5155EVM-SEPIC in constant current mode

    Part Number: LM5155EVM-SEPIC Hi, Is it possible to run LM5155QDSSRQ1 (no hiccup) in constant output current mode? Will the output current will be limited and stable with no resets when the load is high? I would like to select different output…
    • Answered

  • LM5155EVM-SEPIC: The EVM board has ringing

    Resolved
    Part Number: LM5155EVM-SEPIC Other Parts Discussed in Thread: LM5155 Hi, I've loaded the LM5155EVM-SEPIC with 10 ohm load. Vin 17v. Switching frequency 2.14MHz I'm observing very large ringing on: Output diode's anode FET's drain The…
    • Resolved

  • LM5155: Increasing the current capability of LM5155EVM-SEPIC design to 5A

    Part Number: LM5155 Other Parts Discussed in Thread: , LM5176 Hi I have modified a LM5155EVM-SEPIC evaluation module to 5V output voltage by changing R9 (Rfbt) to 18.7 kOhm and that works just fine with up to 2A output current with an input voltage…

  • LM5155: SEPIC application

    Part Number: LM5155 Tool/software: Hi Team customer need double confirm, we reviewed the customer schematic according to the LM5155EVM-SEPIC User's Guide and it seems to be ok, the customer is also to modify the feedback method. please kindly let…

  • RE: LM51551: Designing 12V 5A SEPIC DC-DC Converter - Current limitation debugging

    Hi Prit, The layout has many issues. You should follow LM5155EVM-SEPIC . You should select SMD diode and MOSFET for best performance. Best Regards, Feng Ji

  • RE: LM3488Q-Q1: Voltage drop under high temperature test

    Hi Jass, The SEPIC topology is not specifically listed in the control scheme, but I would assume a CMC Flyback would be the most accurate replacement. (I will need to check this with a compensation expert) For alternative calculation guides, we have…

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