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  • LM25149: LM25149 change output and switching frequency

    TI Thinks Resolved
    Part Number: LM25149 Other Parts Discussed in Thread: , LM5143 , TINA-TI When I use LM25149EVM board,I change output voltage to 25.2V(by change R20 and R21). EVM board works good,but L3 is hot when loading 6A(temperature of L3 >100℃，ambient temperature…

  • LM25149-Q1EVM-2100: Testing LM25148 on LM25149 EVM

    TI Thinks Resolved
    Part Number: LM25149-Q1EVM-2100 Other Parts Discussed in Thread: LM25148 , LM25149 Dear expert, Customer is evaluating LM25148/9 and has some questions: 1. Correct me if I’m wrong, LM25148 and LM25149 both share the same EVB which uses LM25149. If I want…

  • LM25149: How to use FB pin of LM25149

    TI Thinks Resolved
    Part Number: LM25149 Hi Team, I think the FB pin of the LM25149 can change the voltage, but do you have any data on the responsiveness? Also, is it possible to output a negative voltage by connecting a negative voltage power supply? Best Regards, Tom …

  • LM25149-Q1: Question about current limited RC filter for EVM.

    TI Thinks Resolved
    Part Number: LM25149-Q1 Hi team, 1.The current limiting loop on the schematic diagram of the EVM uses an RC filter, but it is not included in the reference design of the Datasheet. The customer hopes to know the parameter selection calculation method…
    • Answered

  • LM25149-Q1: Current Capability Assessment @2.2MHz

    Resolved
    Part Number: LM25149-Q1 Hi team, What would be the maximum current LM25149-Q1 can output with Fsw = 2.2MHz (or close to 2MHz)? Vin = battery level, nominal = 14V, max up to 18V functional. Fsw = 2.2MHz. Ta,max = 70C. Can LM25149-Q1 support below application…
    • Resolved
    • Answered

  • LM25149-Q1: How big can Cinj be for AEF?

    Resolved
    Part Number: LM25149-Q1 Hello, I'm trying to switch at a slower frequency with high attenuation. After using equations #26 in the data sheet, I was noticing that the capacitance values can get pretty high . Is there an upper limit on how big I can make…
    • Resolved

  • LM25149: Pulldown resistor value for CNFG pin on disable Active EMI Filter

    TI Thinks Resolved
    Part Number: LM25149 Datasheet is described "Disable active EMI filter is by pulling the CNFG pin below 0.8 V", is there recommend pulldown resistor value? I couldn't confirm about internal circuit, Vcc, resistor value, etc on the datasheet…
    • Answered

  • LM25149: Efficiency Curve

    Resolved
    Part Number: LM25149 Hi, LM25149 support team The below is an efficiency curve captured from the datasheet. I can see 2 kinds of line which are thick line and fine line. The thick lines looks like an efficiency curve in PWM mode. And the fine lines looks…
    • Resolved
    • Answered

  • LM25149-Q1: CNFG range

    Resolved
    Part Number: LM25149-Q1 Hi team, Could you advise the tolerance of CNFG input? I would like to calculate the resistor tolerance to connect to CNFG. regards,
    • Resolved
    • Answered

  • LM25149-Q1: battery momentary drop

    Resolved
    Part Number: LM25149-Q1 Other Parts Discussed in Thread: LM25149 Hi team, Could you advise if LM25149-Q1 power up to pre-biased output without abnormal voltage on output? I concern "momentary drop of the car battery" condition, The shortest…
    • Resolved

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