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Showing 23 results View by: Thread Post Sort by
  • RE: repurpose voltage mode PWM as voltage to PWM converter

    Rudolph herselman
    Rudolph herselman
    Thanks Peter, That looks like an option! I however cannot seem to figure out what the input range/gain is on the FB pin. I would imagine it would only need a small change to go from 0-100% PWM which is not ideal for my (repurposed) application. I'm…
    • over 9 years ago
    • Power management
    • Power management forum
  • RE: Can't download data sheets

    Alon Goldstein
    Alon Goldstein
    When I tried from Digikey, I did it both ways - I clicked the PDF Icon on the search list, and also entered the component page and clicked the "Datasheet" Text. At first it happened when I tried to check a comparator data sheet, but it seems to happen…
    • over 6 years ago
    • Site support
    • Site support forum
  • Answered
  • RE: UC3842: UC3842

    kawesa Nasser
    kawesa Nasser
    Resolved
    Thank you John for the reply, My input voltage range is 220 - 260 VAC output 5 VDC 3A let me also check out with Webench and the ucc38c42
    • over 8 years ago
    • Power management
    • Power management forum
  • RE: UC3842: how to calculate the number of turns for the pdf example

    John Stevens
    John Stevens
    Bogdan, Thanks for your interest in TI here. The turns ratio and inductance are calculated in section 9.2.2.2 and 9.2.2.3 on pages 23 and 24. Alternatively you could use Webench to calculate your design from the product folder here: Additionally…
    • over 8 years ago
    • Power management
    • Power management forum
  • UCC28C44: UCC28C44 burst switching at light load

    Kazuya Nakai59
    Kazuya Nakai59
    TI Thinks Resolved
    Part Number: UCC28C44 Other Parts Discussed in Thread: UCC38C42 Hello guys, One of our customer is evaluating UCC28C44 on their own AC/DC converter which generates 24V/6A DC from 115V AC input. When their AC/DC converter operates with light loard…
    • over 8 years ago
    • Power management
    • Power management forum
  • Answered
  • RE: UC2843A: next gen of UC2843A

    Steven Mappus1
    Steven Mappus1
    Resolved
    Given, Please take a look at UCC38C42 Family of High-Speed, BiCMOS Current Mode PWM Controllers , App Note by Bill Andreycak. UC2842 has longevity as a legacy PWM controller and this is favored in many industrial, mil, space applications where long…
    • over 3 years ago
    • Power management
    • Power management forum
  • Answered
  • UC3844: slop compensation for D <0.5

    vasudev mr
    vasudev mr
    Resolved
    Part Number: UC3844 Hi I am Vasudev , I am designing 1.5kw 2 switch forward converter for which I am using UC3844 based current mode control to operate only in constant current mode at the output(of course with limited voltage range) . I am aware that…
    • Resolved
    • over 3 years ago
    • Power management
    • Power management forum
  • RE: Isolated flyback multiple outputs - PSR?

    John Griffin1
    John Griffin1
    The PSR controllers with integrated power switch like the UCC2910 family and the PSR controllers with high voltage start up like the UCC28710 family all require a minimum of 35V input in order to start. The UCC28700 PSR controller does not have an integrated…
    • over 10 years ago
    • Power management
    • Power management forum
  • UCC28C42: COMP pin current when FB pin shorted

    HAREL LEVY
    HAREL LEVY
    TI Thinks Resolved
    Part Number: UCC28C42 Tool/software: Hello, In the new and updated datasheet of UCCx8C4x (REV I) a new line of COMP Pin sourcing current when FB pin shorted is added and current = 5.5mA max. 1. Why the new behaviour? 2. Was it ways like it or…
    • over 1 year ago
    • Power management
    • Power management forum
  • RE: TL2844: difference between TL2844 and UCC28C44

    John Stevens
    John Stevens
    TI_GP_PWMs_ComparisonTable_External.pdf Wendy, Thanks for your interest here. These are very popular devices and TI is committed to supporting them for new projects. See attached comparison. Please let me know if you have other questions. Regards…
    • over 5 years ago
    • Power management
    • Power management forum
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