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  • LM25180-Q1: EMI (CE Voltage) Improvement Questions

    Part Number: LM25180-Q1 Other Parts Discussed in Thread: LM25180 Hi, As a result of the EMI measurement, the customer is experiencing a multiplication of 350 KHz, the operating frequency of the LM25180. It comes in a similar format to the EMI Plot in the…
    • Answered

  • LM25180: The RSET resistance question

    Resolved
    Part Number: LM25180 Hi Team, If the resistance of RSET pin ca be chosen 10kΩ? And what's the result if we use 10kΩ？ I think it doesn't influence the output voltage as below equation. Thanks. Best Regards, Ryker.
    • Resolved

  • LM25180-Q1: High Active Current Draw

    Part Number: LM25180-Q1 Other Parts Discussed in Thread: LM25180 , LM5180EVM-S05 Hi TI Team, I am using the LM25180-Q1 in my design, I have tried multiple configurations using the CALC tool and also Webench in order to achieve the active current which…

  • RE: LM25180: LM25180 strange operation at light mode

    Hi, I am closing this thread due to inactivity. Please feel free to reach out if you need more assistance. Thank you, Joshua Austria
    • Answered

  • LM25180-Q1: Schematic Questions

    Resolved
    Part Number: LM25180-Q1 Hi, Customers ask questions. The red rectangular circuit is the Secondary Flyback output. However, the physical location is in the input. The current circuit has a 6.7V output. The customer would like to ask if the feedback Ref…
    • Resolved

  • LM25180-Q1: Low efficiency in light load

    TI Thinks Resolved
    Part Number: LM25180-Q1 Other Parts Discussed in Thread: LM25180 Hi expert, My customer is using LM25180 to design 3-ch isolated power supply. Input voltage is 12V, output voltage is 15V. The inductor of transformer is 25uH, the turn ration is 12:18:18…
    • Answered

  • LM25180-Q1: The results of calculations and SIM results do not match.

    Resolved
    Part Number: LM25180-Q1 The results of calculations and SIM results do not match. Please let me know some possible causes. The condition of assumption is here. ・Vin=14V ・Vout=35V ・Nps=0.5 (Np=1, Ns=2) ・Vf=0.7V ・Rset=12.1kΩ ・Vref=1.21V(It is determined…
    • Resolved

  • LM25180: Can I add capacitor between sw pin to gnd pin for emi improving?

    Part Number: LM25180 Hi Ti, As title, we found that add capacitor between sw pin to gnd pin can improve emi. We hope can put 1nF for more margin. Except efficiency and thermal become worse, what else risk should be know? Thanks Jason

  • LM25180-Q1: Difference of output voltage in the standby mode with LM25180-Q1

    TI Thinks Resolved
    Part Number: LM25180-Q1 Hi, We are testing the product with EOL and found that t he output voltage of some boards deviates. After verification, it is due to the difference of the transformer. And the turn ratio of the transformer is OK, there is only difference…

  • LM25180-Q1: Can I Output -10kV with high turn ratio XFMR?

    TI Thinks Resolved
    Part Number: LM25180-Q1 Hi TI, I am designing a ioniser, can I use a PSR flyback IC with a high turn ratio transformer to create a -10kV output? If this does not make sense, please give me some advises about this application.

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