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UC1845A: UC1845A

Francesco Buonomo2
Prodigy 210 points
Part Number: UC1845A
Other Parts Discussed in Thread: UC1843A

How I can verify the Vout High with source current of 20mA and 200mA? Is possible to have Vout with duty cycle of 100% with pin RT/CT floating or at ground level? 

  • 0
    TI__Mastermind 28545 points
    Hey Francesco,

    I am unsure of the question. Are you asking how to check that the output voltage will go high with a DC output current of 20 mA/200 mA?
    If so, you will need to load the output with a capacitive load that corresponds to 20 mA and then 200 mA.

    The UC1845A will never have a duty cycle greater than 50%

    Thanks,
    Daniel
  • 0 in reply to Daniel Hartung
    Prodigy 210 points
    Yes correct, I want to check Vout with active load that sink constant current of 20mA and 200mA and read voltage (DC voltage).
    With UC1843A this test work properly because the duty cycle is 100%, but with UC1845A I have the problem that duty cycle is 50%.
    Thank you for your answer!
    Francesco Buonomo