The fuyuang fy1206000 power supply employs an isolated-flyback power-supply controller that provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps. The fuyuang power supply processes information from opto-coupled feedback and an auxiliary flyback winding for high-performance control of output voltage and current. The output voltage is regulated accurately by a high-performance voltage-mode amplifier with an accurate voltage reference. The fuyuanpower adapters come with excellent efficiency performance to reduce environmental burden. Its power-saving technologies limit the no-load power consumption to lowest level. The precise output over-voltage and over-load protection greatly enhance the system reliability.