Can I do the start moment,can be faster?Now led strings,light on of the 4-5 seconds,but I want the light on 1-2 seconds from the plug in AC.
The startup time for PMP4715 is in the range of 1.5...2 seconds. What line voltage are you using? Please check out also the leakage current for C6, C7 and to verify you have the correct values, as well as R1 and R4.
For quicker startup you may have to change the network R1, R4, C6, C7, R7 and replace it with the startup circuit shown in the UCC28810 EVM001.
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