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  • UCC2813-0: Design

    TI Thinks Resolved
    Part Number: UCC2813-0 Other Parts Discussed in Thread: UCC2813-5 Hello, I need your help as I am considering UCC2813 for an AC-DC converter. I am considering a reference design https://www.ti.com/lit/pdf/tidrlx3 Please help me to get following queries…

  • RE: WEBENCH® Tools/UCC2813-3-Q1: IC not starting up

    Hi! OK I tried a couple of things. First, I replaced C13 from 120uF to 200uF; it didn't seem to have any impact. Next, I removed D5 and R3, and powered the UCC2813 from a benchtop supply (10V, current limited to 50mA). I applied AC and then powered…

  • RE: Controller for switching a buck converter (or a syncron converter)

    Andreas, TI general purpose, current mode PWM controllers can be set up for VMC by feeding the RAMP into the CS pin and they are not topology specific so they can be used for flyback, forward, buck, boost, etc. Configuring a CMC for VMC is a feature detailed…

  • RE: WEBENCH® Tools/UCC28C45-Q1: Output voltage error, when using current-mode PWM controllers in flyback applications

    Hi Michael, The UCC28C4x and UCC2813-x devices are normally used in secondary side regulated designs which use a TL431 and opto-coupler to feedback the error signal. In these designs it should be possible to get better than +/-5% total regulation of the…
    • Answered

  • UCC2813-3: Oscillator and switching frequency

    Resolved
    Part Number: UCC2813-3 Other Parts Discussed in Thread: UCC2813-2 , , UCC2813-0 , UCC2813-1 , UCC2813-4 , UCC2813-5 Hi Team, UC2813-x can work with switching frequency up to 1MHz. But in datasheet 7.5 Electrical Characteristics: Oscillator session. The oscillator…
    • Resolved

  • RE: UCC2813-2-Q1: request gain margin and phase margin of UCC2813-2-Q1

    Hi Dexter, UC2813 has the same pin configuration as the UC2842/3/4/5 family. there is a detailed section in the datasheet for finding the voltage feedback loop compensation. The section is 9.2.2.10, Voltage Feedback Compensation, on page 25 of the datasheet…

  • RE: UCC2813-0: Webench design transformer spice model

    I just got back in to see if there were any comments added and noticed that schematic I cut and pasted is not showing up. I'm trying again by converting the Webench output to a Word document. WEBENCH ® Design Report Design : 14 UCC2813DTR-…
    • Answered

  • UCC2813 - start or stop the PWM controller in response to input voltage.

    Resolved
    Other Parts Discussed in Thread: UCC2813-5 , UCC2813-0 Hi all Would you mind if we ask UCC2813-0 to UCC2813-5? Our customer would like to start or stop the PWM controller in response to input voltage. So, we consider that it is possible to make it using Reset…
    • Resolved

  • RE: UCC28740: High Vout design check

    Hello Edward, Based on this rather limited set of requirements, the tentative answer is YES. Can you please clarify if the input voltage Vin is AC or DC? If it is DC, then yes the UCC28740 can readily support that spec since the HV input is rated…
    • Answered

  • RE: Flyback converter with high isolation voltage

    Resolved
    Hello Alireza, It is difficult to tell if that bobbin is designed to accept an EFD core just by looking at it. The shape of the bobbin appears to fit an EFD core shape, but only a datasheet for the bobbin will verify if its dimensions are correct for…

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