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Repair / Re: LED Strip lights flashing like a bad 90s rave
« Last post by fmashockie on Today at 05:43:32 pm »I would be looking at IC1 or the BP3319MB LED controller. Not yet for replacement, but for testing. I have attached the datasheet for the BP3319MB. It provides a bunch of information on how the controller works. You can use this information to test the BP3319MB. Is it in undervoltage or overvoltage lockout? Is the PWM providing the correct frequency/waveform? You can verify all this by probing the IC with a DMM and scope.
Now as someone else mentioned, the LED controller is on the primary side. And with it being a PFC controller, there could be voltage as high as 400VDC across the large filter cap. Therefore, it would be best if you used an active probe to check this IC with a scope. A high voltage differential probe like the Micsig DP10007 is affordable and works great.
I would also recommend (like someone else mentioned) testing the led strip without the driver. You can hook it up to a DC power supply.
Now as someone else mentioned, the LED controller is on the primary side. And with it being a PFC controller, there could be voltage as high as 400VDC across the large filter cap. Therefore, it would be best if you used an active probe to check this IC with a scope. A high voltage differential probe like the Micsig DP10007 is affordable and works great.
I would also recommend (like someone else mentioned) testing the led strip without the driver. You can hook it up to a DC power supply.