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Power Supplies: Types and Features of Selection
To supply electronic circuits of computers, televisions, medical, household, and office equipment with electric energy, a special unit — a power supply — is used. Designed to provide electricity to various devices, it can be either linear or switching. The latter are more modern, represent the largest group, and have practically replaced traditional power supply models on the market.
If your equipment requires voltage conversion with subsequent stabilization, take advantage of Discon's offer. We provide various types of power supplies from leading domestic and international manufacturers. To make purchases accessible to everyone, component delivery is available to all cities across Ukraine.
Power Supply: Operating Principle and Design Features
A switching power supply is a device in which mains voltage is converted to DC, and then an inverter converts DC into AC. Simultaneously, the input voltage is adjusted to the required level. The device operates based on the principles of interaction between inverter circuit components. Voltage from the mains is fed to a rectifier, where capacitors smooth the amplitude. The passing sine waves are rectified by an output diode bridge and converted into high-frequency pulses.
At Discon’s website, you can purchase a power supply where conversion is carried out either with galvanic isolation between the mains and output circuits or without it. In terms of design, all switching devices are practically similar. Each converter, besides a transformer, rectifier, and control system, includes the following blocks:
- capacitors;
- output switches;
- secondary stabilizers and filters.
If you need to select a power adapter with specific characteristics, use the assistance of our professional consultants.
Explore Our Range of Power Supplies
Specializing in wholesale sales of electronic components, we have tried to include the most comprehensive range of switching power supplies in our catalog. In this section, you will find AC/DC voltage converters:
- Open and enclosed types, differing in the presence or absence of a protective case and technical specifications;
- AC/DC converters, which are essential components of all modern gadgets;
- LED drivers for LED lighting with current or voltage stabilization, based on specialized ICs (PWM controllers);
- DIN rail-mounted units. These devices feature mounting on standard DIN rails (installed in panels or enclosures).
All AC/DC power supplies from our catalog are certified according to international electrical safety and electromagnetic compatibility standards.
Advantages and Disadvantages of Switching Power Supplies
Switching power supplies significantly outperform linear ones. Unlike transformer-based models, they offer:
- Low weight and compact size, achieved through smaller capacitors and compact transformers while maintaining the same power output;
- High efficiency, reaching up to 98%, thanks to the inclusion of high-frequency components and output switches instead of a stabilizer;
- A wider input voltage range than linear models, allowing use in various locations;
- Reliability ensured by built-in protection circuits;
- Lower cost compared to transformer-based power supplies, since AC/DC switching units do not include a bulky copper-wound transformer.
Among the disadvantages of these devices are poor load-drop tolerance and the potential for exceeding permissible output voltage parameters. Additionally, these power supplies generate high-frequency noise, which is largely mitigated if the manufacturer includes filters.
Applications of Power Supplies
A switching converter is a universal power supply, as it is used today in devices ranging from fractions of a watt to several kilowatts. The upper limit is only constrained by the specifications of the transistors used and can be managed easily.
A reliable AC/DC voltage converter ensures effective operation of equipment and helps prevent malfunctions. Therefore, it is essential to select it based on technical specifications. Our company’s catalog features a wide range of AC/DC components, allowing you to purchase units for any field, from medical equipment to industrial automation.
