LM2595-12 : 5VDC Single Polarity to 12VDC Dual Polarity Converter

5VDC Single Polarity to 12VDC Dual Polarity Converter

During the on-time of the switching cycle, the inductor (L1) is charged by applying the supply voltage across the inductor. During this time the output capacitors (C2 and C3) are supplying the load. During the off-time of the switching cycle, the energy stored in the inductor is transferred to the output capacitors and the loads. The LM2595 is regulated off of the negative output. The positive output is regulated because of the coupling between the windings of the inductor. The diode D4 prevents the ?12V output from the going positive above a diode drop during the turn-on of the circuit. The diode D1 is used for providing isolation between the output and the input. LM2595 operates at a switching frequency of 150 kHz resulting in small inductor and capacitor sizes.

This schematic diagram come from circuit: 5VDC Single Polarity to 12VDC Dual Polarity Converter.
Go to that page to read the explanation about above circuit design.

In the electrical sector, a schematic diagram is usually used to describe the design or model of equipment. Schematic diagrams are usually utilized for the maintenance and repair of electronic and electromechanical devices / units. Original schematics were made by hand, using standardized templates or pre-printed adhesive symbols, but nowadays Electrical CAD computer software is often used.

In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More lately, using the progress of computer system technology, other representations were introduced and specialized computer languages were developed, because with the explosive development of the complexity of electronic circuits, classic schematics are getting less practical. As an example, hardware description languages are indispensable for contemporary digital circuit design.

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