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  • UCC28251: OUTA has drive signal when EN pin is lower than 1.5V

    Part Number: UCC28251 Other Parts Discussed in Thread: UCC27200 , , UCC28521 Hi team, Customer design UCC28251 and UCC27200 like schematics shown. And customer found that when EN pin of UCC28251 is lower than 1.5V, the output of UCC28251 still output drive…

  • UCC28251: Output ripple is too large as 500mV

    TI Thinks Resolved
    Part Number: UCC28251 Other Parts Discussed in Thread: UCC28250EVM-501 , UCC28250 , Hi team, I tested UCC28250EVM-501. Input 40V, output 3.3V, load is 10A. And I found that the ripple can reach to 500mV. And I found that the ripple is affected by the switching…

  • UCC28251: Please share me the interleaved forward circuit applying UCC282251.

    TI Thinks Resolved
    Part Number: UCC28251 Other Parts Discussed in Thread: UCC28221 HI. UCC282251. It is explained in the datasheet that interleaved forward can be applied. Please share me the interleaved forward circuit applying UCC282251. Thank you.

  • UCC28251: How to Use this component as a two switch interleaved forward topology

    TI Thinks Resolved
    Part Number: UCC28251 Hi! My team is planning to use this component as a secondary side controller for a 400VDC to 12VDC Interleaved two switch forward converter. Single Choke topology We're currently having trouble with the synchronous rectification…
    • Answered

  • UCC28251: Full-bridge topology based by UCC28251

    Resolved
    Part Number: UCC28251 Hi! I am designing full bridge DC-DC with UCC28251. Input 220VDC, Output 24VDC/10A, fsw = 250kHz. Controller is on primary side. When input voltage is present, output goes to 24V and then controller shuts own. This process is repeating…
    • Resolved

  • UCC28251: is there any device can support 25kHz minimum switching frequency?

    TI Thinks Resolved
    Part Number: UCC28251 Hi team, customer want a full-bridge or half-bridge controller that can support 25kHz switching frequency, do you have any recommendation? Thx~ Rayna

  • UCC28251: symmetrically driven half bridge PWM converters for wide output voltage range

    TI Thinks Resolved
    Part Number: UCC28251 Other Parts Discussed in Thread: LM5036 , Hello, I am trying to decide if symmetrically driven half bridge DC/DC PWM converters (such as using UCC28251 or LM5036) are suitable for wide output voltage range required in battery charging…
    • Answered

  • UCC28251: Asymmetric half-bridge operation for off-line converters 400Vin to isolated 24Vout

    Resolved
    Part Number: UCC28251 Other Parts Discussed in Thread: LM5036 Hello, Is UCC28251 the best choice for asymmetrically driving a half-bridge (as opposed to 50% duty cycle on both top and bottom switches) for an off-line converter with 400Vin to isolated…
    • Resolved
    • Answered

  • UCC28251: Enable functionality

    Resolved
    Part Number: UCC28251 Hello everyone, I would like to use a logic High or Low level to directly control wether the IC is enabled or disabled. The Problem is, i am hesitant to use the EN-Pin for this because of its Pulse-enable-functionality. According…
    • Resolved
    • Answered

  • RE: LM25037: Full Bridge Design Advice and Ideas

    Resolved
    Hi, LM25037 is for push-pull with on chip driver which would not be used since you use full bridge. If you use full bridge with external drivers then UCC28251 is better since it requires the external driver. LM5045 is for full bridge controller. So compared…

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