85-260VAC to Dual +/-15VDC-0.5A Switching Power Supply скачать в хорошем качестве

85-260VAC to Dual +/-15VDC-0.5A Switching Power Supply

85-260VAC to Dual +/-15VDC-0.5A AC to DC Switching Power Supply ====================================== Altium-365 Workspace (Free): https://www.altium365.com/yt/myvanitar ====================================== Article: https://www.powerelectronicsnews.com/... ====================================== Schematic/PCB/Gerber: https://365.altium.com/files/B4A478AA... ====================================== Other Videos: http://bit.ly/2N9OlPa ====================================== @AtiumOfficial #AltiumStories This article introduces an AC-to-DC flyback switching power supply that converts universal 50Hz/60Hz AC input (85V to 260VAC) to dual-output +/-15VDC to 0.5A (2*7.5W), which can be used in various applications, such as powering dual-supply op amps, amplifiers, and waveform generators circuits. The transformer’s ferrite core is RM8 and DK124/DK125 is the controller chip. The inductance of the transformer's primary winding is 1.13mH and the switching frequency is 65KHz. The estimated leakage inductance is 22µH and the reflected voltage (VOR) is around 110V. The controller chip does not need any external supply rail (through an auxiliary winding on the transformer) and there is no startup resistor through the HV-DC line. The AC input is protected using a glass Fuse and a Varistor. A common mode choke, small loop areas, low impedance ground plane, and an RM ferrite core ensure a low EMI level. All components are through-hole, making it easy to follow and solder even for electronic beginners. The DK124/DK125 is a secondary side flyback type AC-DC Switch Mode Power Controlling IC. Designed with a highly integrated CMOS circuit, it has protection functions for short-circuit, secondary side open-circuit, over-temperature over-voltage, etc. It has a built-in HV power transistor and a patented self-powered supply circuit that reduces required external components and follows a simple transformer design.