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      Top Picks
      • onsemi IC Integrated Circuit Chip NCP1249DD65R2G
      1/1
      onsemi IC Integrated Circuit Chip NCP1249DD65R2G
      $ 4 .00

      ✔ In Stock (Can ship in 5-7 days)

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      The NCP1249 is a highly integrated high−voltage PWM controller capable of delivering a rugged and high performance offline power supply with extremely low no−load consumption. With a supply range up to 30 V, the controller hosts a jittered 65−kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while freezing the peak current setpoint. To help build rugged converters, the controller features several key protective features: a internal brown−out, a non−dissipative Over Power Protection for a constant maximum output current regardless of the input voltage and two latched over voltage protection inputs − either through a dedicated pin or via the VCC input. The controller architecture is arranged to authorize a transient peak power excursion when the peak current hits the limit. At this point, the switching frequency is increased from 65 kHz to 130 kHz until the peak requirement disappears. The timer duration is then modulated as the converter crosses a peak power excursion mode (long) or undergoes a short circuit (short). NCP1249 comes in both Active ON (A and B versions) and Active OFF (C and D versions).

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      Reviews

      • C

        Cedric Anderson

        May 26, 2025

        onsemi IC Integrated Circuit Chip NCP1249DD65R2G
        I’m excited it’ll get here soon; using the site was a cinch.
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      • D

        Dollie Treat

        Mar 29, 2025

        onsemi IC Integrated Circuit Chip NCP1249DD65R2G
        My order was shipped out promptly, thanks!
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      • M

        Michele Bjarnson

        Oct 18, 2024

        onsemi IC Integrated Circuit Chip NCP1249DD65R2G
        My items were sent out with incredible speed!
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      • J

        Joseph Garcia

        Aug 06, 2024

        onsemi IC Integrated Circuit Chip NCP1249DD65R2G
        They do what they say, and say what they do.
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      • A

        Anonymous user

        Nov 25, 2022

        onsemi IC Integrated Circuit Chip NCP1249DD65R2G
        All was ok! No problems whatsoever.
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      onsemi IC Integrated Circuit Chip NCP1249DD65R2G

      $ 4 .00
      Click here to view shipping costs.

      ✔ In Stock (Can ship in 5-7 days)

      Quantity
      MOQ : 78
      Payment Methods
      T/T pay VISA pay mastercard pay Diners Club pay Discover pay JCB pay American Express pay Stripe pay PayPal pay Google pay Apple pay Link pay venmo pay
      • Online Support 24/7

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