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Buck reg YH11060D won't start with load connected 2017-07-18T00:30:33+00:00

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  • Tomt
    July 18, 2017 at 12:30 am
    Post count: 0
    #19633 Reply |

    I have DROK marked YH11060D. I have it set for 5V output.
    The input is simply connected to a bench power supply at 20V, and the 5V output is connected to a resistor of 1.5 ohms. Output current is about 3 amps.
    If the power supply is connected first, and then the load resistor, it operates normally.
    However when the load resistor is connected first, and then the power supply is connected, it enters a mode where the input is shorted to ground, and the output is zero.
    At lower currents (up to 2 amps) it operates normally, the failure occurs only when the load current is 3 amps or above.
    I need the input to be powered on and off when the load is connected constantly. Can you see why this is happening?

    Drok
    Keymaster
    July 18, 2017 at 7:56 am
    Post count: 2971
    #19637 Reply |

    Hello Tomt,
    Thanks for writing in.
    We are sorry we can’t confirm the item you mention. All of items have ASIN number and SKU number. Is it convenient for you to find out one of them from your order information?
    Or you can just send us your order ID.(If you don’t want to show order ID here, please send it to service#droking dot com ( please replace # with @))
    We will try our best to find solution for you once we confirm the item.
    Best regards.

    Tomt
    July 19, 2017 at 10:47 pm
    Post count: 0
    #19653 Reply |

    I have two numbers: B00C4QVTNU; and maybe 100060747. These ones were ordered off Amazon.

    Drok
    Keymaster
    July 21, 2017 at 9:06 am
    Post count: 2971
    #19690 Reply |

    Hello Tomt,
    Thanks for your reply.
    We find out this item:
    090483
    Would you please tell us how large the input current is?
    We have asked out technicians to do some similar test according to your description.
    But it is normal even if the output is set as 5V 8A.
    We wonder if the input power is not enough or is there something that we have overlooked. Please kindly tell us the input current and more other details.
    Best regards.

    Tomt
    July 22, 2017 at 3:31 pm
    Post count: 0
    #19760 Reply |

    With apologies, you are correct, my power supply was triggering the overcurrent shutdown because of the inrush current.
    Thanks for your help!

    Drok
    Keymaster
    July 24, 2017 at 9:05 am
    Post count: 2971
    #19809 Reply |

    Hello Tomt,
    You are welcome.
    It’s glad you have found out the problem.
    Any more questions, please feel free to contact us.
    Best regards.

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Viewing 6 posts - 1 through 6 (of 6 total)
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