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  • LM5574-Q1: Syncing and inverting configuration questions

    TI Thinks Resolved
    Part Number: LM5574-Q1 Other Parts Discussed in Thread: LM5574 I need to design a PSU that has several output rails generated from a single 40V unregulated DC input. The output voltages are +/-19V (0.2A each) and +48V (0.01A). I need all rails to switch…

  • LM5574: -2.89V 12ns max negative voltage

    Part Number: LM5574 Hi team, My customer is using the LM5574 now. The max negative voltage is -2.89V 12ns, but the datasheet only have the DC value. We want to check whether it has risks and how to evaluate the risks. Thanks.

  • LM5574: the Vin/ VSW(transient)/ Vboot min negative voltages

    TI Thinks Resolved
    Part Number: LM5574 Hi team, My customer is using the LM5574 now. Could you please help check the Vin/ VSW(transient)/ Vboot min negative voltages? Thanks.

  • LM5574: Diode Damage

    TI Thinks Resolved
    Part Number: LM5574 Dear forum, We are facing similar problem with the diode getting burned. We have several different boards using this device, some of them 10 years in production. The burn occurs at the customer. Our input voltage is 48V from backplane…

  • LM5574: what's the difference between LM5574 and LM5574-Q1?

    TI Thinks Resolved
    Part Number: LM5574 hi team, what's the difference between LM5574 and LM5574-Q1? Thanks.
    • Answered

  • LM5574: LM5574 Free wheeling diode diode short circuit

    Resolved
    Part Number: LM5574 Dear Team, My customer is using LM5574 in their MP products. They find out one if the customer's return the diode is EOS(Electrical Over Stress). Do you have any ideas why the diode here will short circuit? BR Kevin
    • Resolved

  • LM5574: Diode Damage

    TI Thinks Resolved
    Part Number: LM5574 Dear Team, The customer Vin maximum is 54V and they are facing D3 damage after mass production 3 years. Do you have any comments on it? BR Kevin
    • Answered

  • LM5574: LM5574 Diode Short Circuit

    Resolved
    Part Number: LM5574 Dear Team, Please help confirm the LM5574 design as below, special in "D167, re-circulating diode" part selection. In addition, please also help to check whether the LM5574 OCP feature can prevent the occurrence of smoke…
    • Resolved
    • Answered

  • LM5574: LM5574

    Resolved
    Part Number: LM5574 Prior to TI buyout of National, there was a simple excel spreadsheet for estimating the design parameters derived from the quick start guide app note - unfortunately, the TI site 'shows' that the spreadsheet should be there, but it…
    • Resolved
    • Answered

  • LM5574-Q1: Max switching frequency

    Resolved
    Part Number: LM5574-Q1 Other Parts Discussed in Thread: LM5574 , LM25574 Hello, Can you confirm the max switching of LM5574? Page one says that it can work between 50kHz - 500kHz but Fig 1 on page 7 shows 800kHz is possible. Thanks, Rohit Joshi
    • Resolved

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