Primary, Secondary and Auxiliary C1 is a Y-class 2kV capacitor. So we are using a ferromagnetic transformer with three windings i.e. It is important to isolate the circuit magnetically to avoid stray currents. So to prevent that we have opted for P6KE200A and UF4007 and it clamps the output to 200V. The transformer serves as an inductor for the SMPS driver and produces voltage spikes in switching off cycle due to leakage inductance. Diodes D1 TVS diode works as a clamper & D2 ultra-fast recovery diode works as a blocking diode. The clamping circuit is responsible for clamping the voltage spikes which occur due the switching of transformer. The output is then passed through the capacitor to smoothen the DC output ripple. A diode i.e D3 changes the analog output to the DC output followed by the 10 ohms resistor to resist the inrush current. The IC is embedded with high-power MOSFET that performs switching across the transformer. The integrated circuit is connected to the transformer winding to get the input bias. The resultant digital signal is then filtered and DC level is smoothened using a 400V capacitor with 22uF capacitance. The Analog input voltage is digitized through a 1A, 1000V DB107 full wave rectifier. A 250 VAC X-type line capacitor is connected to avoid unwanted line voltage noise generated in the circuit. In this situation, MOV becomes short to the fuse and the maximum inrush current flows through the slow blow fuse.įollowing fault protection is the input line filter capacitor. Whenever the input voltage shoots up more than the limit often called as voltage surge causes extreme current flow. As you can see through the schematic, F1 in series is a 1A, 250VAC slow blow fuse and MOV is a 275V, 7mm MOV. The fault protection circuit consists of a fuse and a Metal Oxide Varistor(MOV). Input surge and fault protection circuit.These are as follows and will be discussed in detail in the next section: The VIPER22A SMPS Power supply consists of different parts and sections. Image Credit: link VIPER22A Circuit Components The schematic of the SMPS prototype is displayed for the show. The prototype is built in Power Supply design software provided by its own manufacturers. The circuit takes in 220-240 volts input power to give out 12V,1A of output at full load. This section is an example guide of SMPS Power supply circuit using VIPER22A SMPS Controller IC. VIPER22A SMPS Example Circuit SMPS Power Supply

Skema pwm sg3525