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  • UCC28750: UCC28750 Simplis models POP run failure. POP not able to find steady state due to frequency dithering feature implemented in the simplis model

    TI Thinks Resolved
    Part Number: UCC28750 UCC28750 Simplis controller model fails to reach steady state during POP analysis. This is due to frequency dithering feature in the controller. In fact we tried to disable and enable UCC28750 controller feature and run the simulation…
    • Answered

  • UCC28750: UCC28750 SIMPLIS Simulation Error

    Resolved
    Part Number: UCC28750 Tool/software: Hello, I recently used WEBENCH to derive a circuit for an isolated flyback using the UCC2875 IC. I want to simulate the circuit using the SIMPLIS since the model is on the TI website. Unfortunately, I keep getting…
    • Resolved
    • Answered

  • UCC28750: UCC28750

    Resolved
    Part Number: UCC28750 Tool/software: Hi, Does UCC287502 PWM controller has valley switching operation? Regards, KIRAN SURVE
    • Resolved
    • Answered

  • UCC28750: UCC28750

    Resolved
    Part Number: UCC28750 Tool/software: As shown in the attached circuit diagram, I'm planning to use it with a bulk voltage between 120Vdc and 392Vdc. Is there a problem? The bulk voltage will be applied to VDD for start-up, but this will exceed the VDD…
    • Resolved

  • UCC28750: VDD Output Analysis

    TI Thinks Resolved
    Part Number: UCC28750 A power supply was designed using the UCC287502, with the schematic shown below. Please review the design for any issues and explain why the PWM does not output when different Zener diodes are used, while VDD remains above 12V. The…

  • UCC28750: Support 800VDC input

    TI Thinks Resolved
    Part Number: UCC28750 Hi team, Can UCC28750 support 800VDC input and Vo=18/0.1A Vo=8V/0.3A ? Could you give me some advice regarding the transformer's architecture? VDS start can be 1 layer? or last layer? thanks

  • UCC28750: Design reference clarification from Webench

    Part Number: UCC28750 Hi Experts, Would like to ask guidance on this query from customer when designing UCC287506DBV: https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=11D50577AF14EE2F I am reviewing the circuit generated in WEBENCH® POWER…
    • Answered

  • UCC28750: flyback for peak power 200W

    Resolved
    Part Number: UCC28750 the UCC28750 is suitable for following application? requirement: 1)input:180Vac-305Vac; 2)output :24V,3A for 5s(including 8A 20ms at start), normally 0.1A; isolated; 3)required current-mode PWM control chip, mainly used in…
    • Resolved

  • UCC28750: design issue with UCC287505

    TI Thinks Resolved
    Part Number: UCC28750 Hello, I am using the TI part name UCC287505 in a DCDC-Design (isolated Flyback topology) to supply the HS and LS gate driver circuits of a servo drive. The Flyback should deliever 4 output voltages: 3 HS Voltages for the 3…

  • UCC28750: Cost‑Down Alternative Device Selection

    Part Number: UCC28750 Other Parts Discussed in Thread: UCC28722 , UCC28742 , UCC28740 Hi team, Our customer is currently using the following incumbent devices: Device Specification Manufacturer Target Cost FA5642N‑C7‑TE3 –…

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