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Home/dc-dc conversion

volt.tech Latest Questions

Alex thomas
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Alex thomas
Asked: January 16, 2023In: Power Management

Why Facing a Peculiar Problem with L5973D

  • 0

Hello, I’m designing a circuit with an L5973D switching controller to give 3.8 v and am facing a peculiar problem. The circuit is as per the design reference in the datasheet and the feedback resistors are given to give 3.8 v ...Read more

Hello,

I’m designing a circuit with an L5973D switching controller to give 3.8 v and am facing a peculiar problem. The circuit is as per the design reference in the datasheet and the feedback resistors are given to give 3.8 v affair (10K and 4.7 K). originally, I get 3.8 v. But while leaving the circuit connected, it starts inching up about 10mV every 10 twinkles or so. likewise, powering down the circuit and also back over doesn’t beget it to give 3.8 v again. Wondering what is going on.

Read less
dc-dc conversionl5973dpeculiarpower managementproblemresistors
  1. nidhi singh
    Added an answer on January 20, 2023 at 11:09 am

    Hi, out of my one experience in switch mode power supplies there are a couple of key points to follow when doing these designs. 1. Insure all resistors are 1 type, this limits the change over temperature which in turn will limit the output change variations. 2. Insure the track from the switching poRead more

    Hi,

    out of my one experience in switch mode power supplies there are a couple of key points to follow when doing these designs.

    1. Insure all resistors are 1 type, this limits the change over temperature which in turn will limit the output change variations.

    2. Insure the track from the switching point is close as possible to the coil and doesn’t add resistance to the coil.

    3. Output capacitors require to hold a low ESR type

    hope some of this helps.

    Thanks & Regards

    Nidhi Singh

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