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Thread: Problems of BTN8962

  1. #1
    Beginner Beginner whlbq94 is on a distinguished road
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    Problems of BTN8962

    In the product data sheet, please refer to ""Figure 16"". Let's assume two changes in my application:

    1 - My power supply will be a 35V battery power supply
    2 - The motor ""M"" will be replaced by a highly inductive load (essentially a coil) that is about 500mH and a DC resistance of 2.9 ohms

    Questions:
    With a highly inductive load replacing ""M"", it would cause voltage surges back to the power supply, how can the supply be protected?
    What is the effect of the flyback current from the inductive load on the battery supply?
    What precautions should I take to protect it? The most obvious seems to be the use of a diode from the battery in series to the circuit.
    "

  2. #2

    Infineon Employee
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    bingquan is on a distinguished road
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    The max. rating of VS is 40V. If current flows back to the battery, the device might have avalanch issue. It is import to make sure the voltage doesn't exceed the max. Rating. Using a diode is the correct way to avoid the problem. Please be noticed all parameters are specified for supply voltage range of normal operation( 8V to 18V ). The parameters might have deviations when Vs is 35V.
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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