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Original question:

TPD8F003 SD-card EMI protection

TPD8F003: issue with TPD8F003

praveen kumar2
Prodigy 20 points
Part Number: TPD8F003
Other Parts Discussed in Thread: AM5728

we are using the TPD8F003 IC for EMI filtering. so we connected this IC between sitara processor AM5728 GPIOs to this ICs, and output of this EMI filter is connected to the LEDs for blinking. we used common anode leds and made this GPIO to high for OFF the LED. but we are unable to off.  we are getting 1.6V at the output of EMI filter. but when we remove this filter and checked the voltage we are getting 3.3V. how we can solve this issue. 

  • 0
    TI__Genius 12410 points

    Hello,

    If I am understanding this correctly you are powering an LED through a GPIO and placing the filter inbetween.

    This means that you have 100 ohms in series with the LED. I would assume the voltage is being dropped across the resistor inside the EMI filter.