I have made LED driver which is based on LNK454D. I attached schematic, file with prepared calculation (from PIExpert) and Transformer's datasheet. I need to supply LED with forward voltage 12V and current 0.15A from 230Vac input voltage.
I have a problem with stable work of that PSU. When I connect 230Vac to the input of PSU, brightness of LED grow (about 1.5sec.), after that time the LED turn off for 1.5sec. After that 1.5sec turn off state, the PSU repeat hole cycle of hiccups.
I can't find the reason why my LED driver don't work stable (without hiccups).
I have measured the voltage on BP pin, and there is a stable about 6V.
I have measured the waveform on FP pin and I haven't seen that level of signal exceed 290mV.
I have measured the current into the trafo's windings, and I have seen properly waveforms (for flyback topology).
I don't know where is mistake. Please help me to resolve my problem because I don't know if I need to change the driver.
With Best regards