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Thread: Btn8962

  1. #1
    Beginner Beginner Allecsxx is on a distinguished road
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    Btn8962

    Hi,


    I'm trying to read the IS pin with atmega and stop any PWM or disable high side of my H bridge. To simulate a fault i'm shorting high side and low side while the H bridge is driving my motor. I have 1k pull down resistor connected to IS pin. Using an oscilloscope to catch any changes of IS pin... no matter how long i'm shorting high side and low side the IS pin remains logic LOW.

    Heating up to 50 degrees with a hair dryer i can get 5v out of the IS pin.

    Dstasheet says that BTN has protection for short circuit ... Is this true? If yes... Any suggestions to simulate this?

  2. #2

    Infineon Employee
    Infineon Employee
    Jing.N is on a distinguished road
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    Jun 2018
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    If I understand it correctly, you use a H-bridge to drive the motor. To test the short circuit protection, you connected outputs of two BTN8962TA without motor in between? Or you connect output to GND when high-side is switched on, and connect output to VS when low-side is switched on?

    We do have short circuit protection feature integrated. When short circuit happens, the switch will be deactivated and the other switch will be activated for tCLS. After tCLS the switches return to their initial setting. And the error signal at the IS pin is reset after 2*tCLS.

    Please find the detailed information in chapter 5.3.3 and 5.3.4 in our datasheet:
    https://www.infineon.com/dgdl/Infine...3fbe32289b7c17
    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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