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  • UCC3813-4: The output pin being short to Gnd pin found

    Part Number: UCC3813-4 Hi Expert, The customer reported the UCC3813-4 output pin being short to Gnd pin from end customer site. They can see 19 units being damage during 4000 units build. Can you help to comment the schematic and captured waveforms…
    • Answered

  • UCC3804: What is the difference between UCC3804 and UCC3813-4 ?

    Resolved
    Part Number: UCC3804 Other Parts Discussed in Thread: UCC3813-4 , UCC3800 Hi I see the specifications UCC3804 and UCC3813-4 are similar, but the price are different. What is the difference between these two? thank you.
    • Resolved
    • Answered

  • TINA/Spice/UCC3813-4: TINA-TI Startup / Steady State Reference Design

    Resolved
    Part Number: UCC3813-4 Other Parts Discussed in Thread: TINA-TI , Tool/software: TINA-TI or Spice Models Hi, Why does Startup and Steady State exist for TINA-TI Reference Design of UCC 3814 and other AC / DC cotrolars? Thanks
    • Resolved

  • SMPS 28VDC@4 amps - UCC3813 and PMP3029

    Other Parts Discussed in Thread: PMP , TL431 Hi all, I am looking for a reference design(schematic+BOM) for switch mode power supply(SMPS) with the following specifications and having LOW BOM cost. Input voltage: 230V AC, 50Hz Output voltage: 28V…

  • UCC3813-3: Output pulses irregular without load

    TI Thinks Resolved
    Part Number: UCC3813-3 I am using the UCC3813-3 in a flyback to generate 800 V from 48 V. If a load of 25 mA is connected to the output voltage the duty cycle is 40 % and the transformer heats up to 50 °C. If no load is connected the output voltage…
    • Answered

  • RE: LM5118 - Input current control configuration question

    Resolved
    Thankyou for the response, the link you provided cannot handle the input voltage requirement though. I should point out I am just looking for a simple way to regulate the duty cycle in a DC-DC converter based on the input current into the converter. Would…

  • RE: Looking for suitable high-voltage DC-DC Converter with existing Evaluation Board

    Hi, We do not have a design to match your specs. Also for > 120W, I only find a ref design but not with flyback. UCC3813_PMP7405B_LED.pdf We have an EVM using different topology as well. www.ti.com/.../sluu380 
    • Answered

  • UCC3813-1: Flyback Switching Frequency and Sync Duty Cycle Issues

    Resolved
    Part Number: UCC3813-1 Other Parts Discussed in Thread: UCD3138 , , UCD3138HSFBEVM-029 I am working with a UCD3138 hard switching full bridge evaluation module (UCD3138HSFBEVM-029). It uses a UCC3813-1 for the 3 housekeeping supply rails. Schematic available…
    • Resolved
    • Answered

  • RE: LMR38025-Q1: Non-ground Reference for Buck Step Down v. Inverting Configuration.

    Resolved
    Hi Mitchell, So we typically don't have a negative input to negative output buck converter, and don't recommend you do that with the LMR38025. What you can do is use a PWM controller to do so, as shown here: /cfs-file/__key/communityserver-discussions…
    • Answered

  • RE: UCC3813-0: UCC3813-0 Design Calculations

    Resolved
    Dear Peter Thanks. Please find attached excel sheet. In this Lm and OP Capacitor calculation is there as per application note given in datasheet. UCC3813-0.xlsx

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