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Do you know what are the common types of switch mode power supplies?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.27
A switching power supply is a type of power supply that controls the flow of current through switching elements (usually transistors). According to different working principles and topological structures, switching power supplies can be divided into several different types. The following are some common types of switching power supplies:




Switching mode power supply

Pulse Width Modulation (PWM): Adjusting the output voltage by changing the on/off time of the switch to maintain a stable output. Suitable for most applications, providing efficient and compact solutions such as computer power supplies, TV power supplies, etc.

Pulse Frequency Modulation (PFM): Adjusting the output voltage by changing the operating frequency of the switch, usually used under light load conditions. It can improve efficiency and is suitable for scenarios that require a large range of load changes, such as mobile devices, Laptop adapter.

Linear mode power supply

Use linear components (such as transistors) to adjust voltage, and achieve voltage regulation by adjusting the components through which current flows. Suitable for applications that are more sensitive to electromagnetic interference, as linear power sources generate less interference. There are also some scenarios with low power consumption and low noise requirements, but the efficiency is relatively low. For example, old-fashioned mobile phone chargers.

Switching capacitor power supply

Use a switched capacitor network to achieve voltage conversion. Suitable for applications under limited space and light load conditions, with a simple circuit structure. For example, some small electronic devices, such as LED flashlights.

Resonant converter

Efficient energy conversion is achieved through resonant inductors and capacitors. Suitable for high-frequency operations, providing efficient power solutions.

Some applications that require high power density and efficiency, such as high-frequency power supplies and some communication equipment.

These are some common types of switching power supplies, each with its own applicable scenarios and advantages. The selection of a specific type of switching power supply usually depends on the requirements of the application, such as power efficiency, size, cost, etc.
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