The design of LED power supplies requires consideration of many factors. Efficiency and quality are important, but cost control is a must. How to find a balance between these three can design a better power solution, this article describes a small cost power solution designed by an engineer, for your reference only.
Program features:
Isolation scheme: can pass CE
Input: AC85~265V
Output: 9.05V current 0.7A
PF value: at 220V, 0.938 (can also be adjusted a little larger)
THD: about 15%
Power efficiency: 82%
Size: PCB40*25*16
The entire power material cost is about RMB 8
Using a 3x3WRM6 transformer, the schematic of the transformer is as follows:
Transformer schematic
The schematic diagram of the scheme is as follows:
Waterproof Connector,Idc Connector,Idc Socket Connector,Horizontal Waterproof Idc Socket Connector
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