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Showing 118 results View by: Thread Post Sort by
  • UC3842: Why the curent sampling resistor always burnted out?

    user5886917
    user5886917
    TI Thinks Resolved
    Part Number: UC3842 I used UC3842 to design a 30V-60V Boost circuit,but the curent sampling resistor always burnted out.What's the possible reasons?Thank you!
    • over 6 years ago
    • Power management
    • Power management forum
  • TL494: SMPS Design using TL494 and UC3842

    Shubham Bidkar
    Shubham Bidkar
    TI Thinks Resolved
    Part Number: TL494 Other Parts Discussed in Thread: UC3842 Hello, I want to design SMPS using TI's UC3842 for 12V,10A(Isolated Flyback) also 24V,10A SMPS using TL494(half bridge).I also tried using Webench but could not find UC3842 and TL494 reference…
    • over 7 years ago
    • Power management
    • Power management forum
  • RE: UC3842: Feedback circuit is not working properly with shunt regulator

    Teng Feng
    Teng Feng
    Hi Manjunath, I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out). Thanks. Regards, Teng
    • over 7 years ago
    • Power management
    • Power management forum
  • Answered
  • UC3842: Can I use UC3842b with 1-phase rectified DC

    Vicky Siraswar
    Vicky Siraswar
    Resolved
    Part Number: UC3842 I have built a non-isolated boost converter which should operate with 1-phase rectified DC as well as three phase rectified DC. I have validated the converter for three phase rectified DC and now I am trying to operate converter with…
    • Resolved
    • over 7 years ago
    • Power management
    • Power management forum
  • RE: UC3842: Regulator not oscillating correctly

    John Ogborne
    John Ogborne
    First I must apologise for taking up so much of your time and for what must be a rather frustrating continuing saga! You have probably guessed that I am working at home with some basic kit. However, I have done some screen shots which are pasted below…
    • over 8 years ago
    • Power management
    • Power management forum
  • UC3842 Aux power topology

    Brian Wang0928
    Brian Wang0928
    TI Thinks Resolved
    Other Parts Discussed in Thread: UC3842 In the UC3842 datasheet, there are some questions on an application circuit. What's the purpose of the D3 and C4? Why there two diode rectifier in the circuit? What's the purpose of the R9? Regards, B…
    • over 9 years ago
    • Power management
    • Power management forum
  • UC3842: How does the 2W flyback power supply based on UC3843 achieve 2500V AC isolation voltage between primary and secondary?

    zoujiangyilang
    zoujiangyilang
    TI Thinks Resolved
    Part Number: UC3842 Other Parts Discussed in Thread: UC3843 Hello, I used UC3843 to make a 2W winding feedback flyback IGBT drive power supply. The circuit block diagram is as follows: The circuit is a conventional flyback circuit. The control winding…
    • over 6 years ago
    • Power management
    • Power management forum
  • UC3842: how to calculate the number of turns for the pdf example

    bogdan ardeleanu
    bogdan ardeleanu
    TI Thinks Resolved
    Part Number: UC3842 Other Parts Discussed in Thread: UCC38C42 For the example in pdf I have not found a formula for finding the number of turns in the primary and secondary winding starting from the primary and secondary inductor of 1.5mH and 15uH respectively…
    • over 8 years ago
    • Power management
    • Power management forum
  • UC3842 symmetric

    Fernando Cuzziol30
    Fernando Cuzziol30
    Other Parts Discussed in Thread: UC3843 I already have a source SMPS using this component that meets my needs. X 12V 6A. Photo attached. Now I'm developing a smps with symmetrical output +/- 35V x 3A for audio and +/- 15V x 500mA for pre-amplifier.…
    • over 11 years ago
    • Power management
    • Power management forum
  • Answered
  • UC3842 Buck Converter pspice Model !

    Ahmed Magdy
    Ahmed Magdy
    Resolved
    Other Parts Discussed in Thread: UC3843 , UC3842 , UCC2813-0 , UCC2800 , UCC28C40 I want to get pspice Model of IC (UC3842 or UC3843) for ORCAD Program for Simulation and making Buck Converter
    • Resolved
    • over 11 years ago
    • Simulation, hardware & system design tools
    • Simulation, hardware & system design tools forum
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