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      My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
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        My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
        \n
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        I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
        \n
        Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
        \n
        I’d love to hear your thoughts about how I should go about this. Thanks
        """
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      I would just use a MOSFET and resistor to drive the LED if you are only using it in short bursts.\n
      \n
      If you want to drive the MOSFET directly from the microcontroller pin, it will need a series resistor to limit the current since the gate has quite a bit of capacitance. If your microcontroller pins can handle 15-20mA, it will be able to switch an AO3400A fast enough without needing a gate driver.
      """
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      +title: "Can I switch this constant current LED driver at 38kHz?"
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        My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
        \n
        I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
        \n
        I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
        \n
        I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
        \n
        Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
        \n
        I’d love to hear your thoughts about how I should go about this. Thanks
        """
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      I would just use a MOSFET and resistor to drive the LED if you are only using it in short bursts.\n
      \n
      If you want to drive the MOSFET directly from the microcontroller pin, it will need a series resistor to limit the current since the gate has quite a bit of capacitance. If your microcontroller pins can handle 15-20mA, it will be able to switch an AO3400A fast enough without needing a gate driver.
      """
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