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Thread: [SOLVED] Issue with TLE9844QX's High Side switch.

  1. #1
    New Member New Member ePowerForever is on a distinguished road
    Join Date
    Nov 2018

    [SOLVED] Issue with TLE9844QX's High Side switch.

    Hi all,

    Iím using the TLE9844QX chip. I am facing an issue with the High Side switch, it switches off if the supply is less than 5V.

    Is that a normal behavior ?

  2. #2
    Intermediate Intermediate
    Infineon Employee
    Infineon Employee
    pestadieu is on a distinguished road
    Join Date
    Sep 2018

    I really like your username.

    The High side pin for TLE984x series MCU works fine up to 5.5V. Below 5.5V, it will switch off due to undervoltage on VS pin.

    In order to work in the extend range of up to 3V on VS pin, the bit HSx_CYC_ON_ACTIVE need to be set to 1. This bit is in the HS_CTRL register.
    More information can be found in the User Manual (Rev 1.0) on page 925.

    Kind Regards
    Last edited by pestadieu; Nov 22nd, 2018 at 01:09 AM.
    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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