Search tips
Showing 13 results View by: Thread Post Sort by

  • UC2842AQ: UC2842AQ Start up issue

    TI Thinks Resolved
    Part Number: UC2842AQ Other Parts Discussed in Thread: UC2842 , TL431 Hi, I have designed 2 switch flyback converter with UC2842. My ststem's input voltage is 200V~1000V and I designed start up circuit with depletion mosfet. I followed SLUAAL3 - figure…

  • UC2842: UC2842AQ

    Part Number: UC2842 Other Parts Discussed in Thread: UCC28C56EVM-066 Hi dear. I designed SMPS with UC2842AQD8R. My system should start at 200V. My start up circuit looks like this. It's now activate at 260V. How can I make it operate at 200V?…

  • UC2842AQ: Startup resistor power loss issue at 1000 V input in flyback converter (200 V–1000 V input, 24 V output)

    TI Thinks Resolved
    Part Number: UC2842AQ Hello, I’m currently testing a prototype flyback converter that delivers 300 W output power with an input voltage range of 200 V to 1000 V and an output of 24 V . The startup resistor is currently 293 kOhm , and the VCC capacitor…

  • UC2842AQ: Confirmation required for PWM control IC Marking

    TI Thinks Resolved
    Part Number: UC2842AQ Tool/software: We are working on a new Power supply redesign project which has got the power management IC with top marking as “ 28428 AK ISO”. Our initial understanding is that this is a Current mode PWM Controller part UC2842AQ…

  • UC2842AQ: How to adjust the duty ratio of the MOS switch?

    TI Thinks Resolved
    Part Number: UC2842AQ Other Parts Discussed in Thread: UC2842 Tool/software: After the current circuit was enabled, Q2, R20, and R28 were burned out within 5 seconds. R28 will explode. I suspect that it may be due to the high duty cycle of the MOS…

  • UC2842AQ: UC2842AQD8R

    TI Thinks Resolved
    Part Number: UC2842AQ Hi TI Team, Could you please provide the temperature derating graph and Reference Short Circuit Current vsTemperature for part no UC2842AQD8R , which is not available in technical datasheet.

  • UC2842AQ: eval board

    TI Thinks Resolved
    Part Number: UC2842AQ Other Parts Discussed in Thread: UC2842A Hello, Is there an eval board for UC2842AQ for evaluation with? Thanks, Adam

  • UC2842AQ: Ceramic Output Capacitors

    TI Thinks Resolved
    Part Number: UC2842AQ Hi, We are using UC2842AQ in Two switch Forward converter Topology - Vin = 32, Vout = 12, Transformer ratio 1:2, Load 14.13A, Freq 150KHz. We are operating the Regulator at Current Mode. The regulator would always be in CCM…
    • Answered

  • UC2842AQD8R - Temperature characteristic about Maximum Input Signal(Current Sense Section), Initial accuracy and Discharge current(Oscillator Section) in case of TA -40 to 125

    Resolved
    Other Parts Discussed in Thread: UC2842AQ Hi all, Would you mind if we ask UC2842AQ? In case of TA -40℃ to 125℃, if you have following datas, could you send me? We will use these as reference data. -Temperature characteristic of Maximum Input Signal…
    • Resolved

  • UC2842A: UC2842A Understanding the circuit.

    TI Thinks Resolved
    Part Number: UC2842A Hi, I have read datasheet of UC2842A and application circuit ( calculation ). Questions : 1. Snubber Circuit ( RCD snubber selection ) Calculation not specified ? Please give the calculation details. 2. Is there any Simulation…

Didn't find what you are looking for? Post a new question.