LED Drivers/LCD Bias

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LED Drivers/LCD Bias

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ground bounce
Related Posts

  • Forum Post: Re: TLC5946 Ground Noise Issue

    Michael Day
    This is probably a layout issue. You may have large switching currents in the ground plane flowing past the more sensitive analog ground currents associated with the control signals. When your +V voltage is very low, the TLC5946 probably turns the outputs on and off slower than when the +V is higher...
    on Feb 9, 2010

  • Forum Post: Re: TLC5946 Ground Noise Issue

    david greenberg
    I tried using 22uF bypass capacitors across the TLC5946's VCC and GND, to no avail. I also added an additional path to ground (the board is very cramped and has very few grounds, so only this additional path exists). Could bypassing +V be a potential solution? Also, are there descriptions on how...
    on Feb 9, 2010

  • Forum Post: Re: TLC5946 Ground Noise Issue

    Michael Day
    There is no description of how the IC works with different voltage on OUTn. The IC requires a minimum voltage (specified in the datasheet) on OUTn to meet specifications. Adding additional capacitance may help. Specifically, you need to follow the path of an electron as it flows from the input voltage...
    on Feb 9, 2010

  • Forum Post: Re: TLC5941 XERR

    Brigitte
    Hello Andrew, When measuring XERR are you using the IC GND pin as reference? I just want to make sure that this is not a measurement problem. I can see some ringing on XERR even when just BLANK goes high and wonder if the GND connection of the probe is maybe somewhere far away from the IC GND pins...
    on Mar 26, 2012

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