Switching Power Supply, Power Inverter, Scrolling System manufacturer / supplier in China, offering Sp-500-27 500W 27V 18A Switching DC Programmable DC Power Supply, 500W 12V 24V AC/DC LED Block Diagram Switching Switching Power Supply, Sp-320 Power Supply 320W 12V 24V 48V DC Pfc Function Power Supply and so on.