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Thread: IR2153D Max Frequency?

  1. #1
    Beginner Beginner boom is on a distinguished road
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    IR2153D Max Frequency?

    about the IR2153D.

    On the datasheet there's a chart called "IR2153 RT vs Frequency". It shows frequency as high as 1 MHz.

    But the table called "Electrical Characteristics" says "Oscillator frequency: Max: 106 kHz".

    So what's the max frequency?

    Thanks

  2. #2
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    The Electrical Characteristics table provides the test condition for the Max. Oscillator Frequency as Ct = 1 nF and Rt = 7.43 kΩ giving 106 kHz. For the minimum recommended values of Ct = 330 pF and Rt = 10 kΩ , the maximum oscillator frequency can be 1 MHz.

    You can look at the below application notes on the working of IR2153D.

    1. http://www.infineon.com/dgdl/dt98-4....554de8f0885e14
    2.http://www.infineon.com/dgdl/dt98-1....554de8ed5d5e0f
    More information can be found under www.infineon.com/gatedriver
    Please contact our Technical Assistance Center for further inquiries

  3. #3
    Beginner Beginner boom is on a distinguished road
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    Thx for that!
    Last edited by boom; Sep 28th, 2020 at 10:27 AM.

  4. #4
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    is there a special importance for Ct = 1 nF and Rt = 7.43 kΩ ? Is this a recommended values? Or just arbitrary example?

    i don't see Max Frequency in Infineon Gate Drivers parametric search. Does that mean all devices have same Max Frequency of 1 MHz?

    thx

  5. #5
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    They are arbitrary examples used to test at close to 100 kHz switching frequency.

    Isolated gate drivers can go to 1 MHz, level-shift gate drivers are limited to around 300 kHz to 500 kHz as level shift losses dominate at higher frequencies leading to higher thermal / power dissipation.

    See the below application note which describes the different loss mechanisms inside a gate driver:

    http://www.infineon.com/dgdl/Infineo...6e5967d5894033
    More information can be found under www.infineon.com/gatedriver
    Please contact our Technical Assistance Center for further inquiries

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