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  • UC2845A: Absolute Maximum Operating temperature for UC2845A

    Resolved
    Part Number: UC2845A I need the Absolute Maximum Operating Temperature for UC2845AD8. Device is rated to 85C ambient but our environments often exceed this. If Absolute Maximum Operating Temperature is not available, then can someone provide the maximum…
    • Resolved

  • UC2845A: VCC drop when load current change instantly

    TI Thinks Resolved
    Part Number: UC2845A Hi, We faced a a problem when we just start up UC2845A as flyback circuit for fan. When the system start up, the fan will make load current from 0 to 3A within 200ms. The secondary side voltage will be from 24V up to 25V and this will…

  • UC2843A: UC2843A vs UC2845A

    TI Thinks Resolved
    Part Number: UC2843A Other Parts Discussed in Thread: UC2845A , Hi, Could you please let me know the comparison between UC2843A and UC2845A? Thanks and best regards, M. HATTORI.

  • UC2845A: How much temperature can UC2845A Junction be withstanded ?

    TI Thinks Resolved
    Part Number: UC2845A Other Parts Discussed in Thread: UC2843A , UC1844A , UC3844A , UC1845A , UC3845A , UC3842A , UC2842A , UC1842A , UC2844A , UC3843A , UC1843A Hi, Team. Could you tell me how much temperature how much temperature can UC2845A Junction be withstanded…

  • UC2845A: UCC2845A question about FB terminal pin?

    TI Thinks Resolved
    Part Number: UC2845A Dear support member, My customer used UC2845A. （Circuit configuration） Bias winding feedback system using UC2845A FB terminal is adopted. 2.5V is input to the FB pin from the bias winding on the input side via a voltage dividing resistor…

  • soft-start circuit of UC2845A

    TI Thinks Resolved
    Other Parts Discussed in Thread: UC2845A , UCC38C42 We have questions about UC2845A. We try to design the soft-start circuit by using this application note p.14 figure.12 about UC2845A. This application note is published in web page of UC2845A. http:/…

  • UC2845A: UCC2845A's UVLO

    TI Thinks Resolved
    Part Number: UC2845A Hi, team. what "Start threshld" and "minimum operation voltage after turnon" mean and its different ? how do we use 2 below different parameters ? is there any reason why there are 2 different voltage?
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  • UC2845A: start-up time

    Resolved
    Part Number: UC2845A Hi, Team. i've been asked by Customer as below. 1. is it realistically happened that It takes 20sec for start up time as below condition. DC180V start up R...188kohm(there are 4 resister(47k) in series. Cap for Vcc..470uF …
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  • UC2845A: UC2845A Question about ON / OFF function by using the COMP terminal.

    TI Thinks Resolved
    Part Number: UC2845A Dear support member My customer used UC2845A. I have a question. （Situation） My customer thinking the external ON / OFF function by using the COMP terminal. Specifically, when the input voltage exceeds a certain voltage, the control…
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  • UC2845A: How much is the comp pin output ?

    Resolved
    Part Number: UC2845A Hi, Team. May i ask you to know how much is the maximum output voltage of comp pin? could you tell me how those pin works ? it seems like that it is "output" pin type but there is not information about COMP pin. could you…
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