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  1. pipelined

    led driver low frequency oscillation help

    Hi Andy, Yes, the LEDs are in series. My idea was to make a constant current source to control the brightness of the individual LEDs in the series. To dim the LEDs, I apply a PWM signal w/c turns a switch on/off. This switch(MOSFET) is in series with the LEDs. The oscillation occurs even if I...
  2. pipelined

    led driver low frequency oscillation help

    Hello everyone, I'm having problems with an led driver I built. Circuit Description: The LED driver board has three boost circuits: one for Red, Green and Blue. The input voltage is 24v and depending on the LED bus, the outputs can swing from 40v to 90v. Each one of these circuits has a 3843...

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