Switching Power Supplies

Switch mode power supplies (SMPS), also known as a switching power supply, are electronic devices that provide efficient and regulated power conversion from one voltage level to another. They are widely used in a variety of electronic devices, including computers, smartphones, televisions, industrial equipment, and more.

Switching power supplies offer several advantages over traditional linear power supplies, such as higher efficiency, smaller size, and lighter weight.

Here at RS New Zealand, we stock an extensive range of high-quality, high-efficiency SMPS from industry leading brands including Mean Well, XP Power, TRACOPOWER, Cosel, and of course RS PRO.

How does a Switching Power Supply Work?

The basic principle behind computer switch mode power supply involves rapidly switching an electronic switch (usually a transistor) on and off at a high frequency. This creates a square wave-like signal, which is then fed through an inductor and/or a transformer. By controlling the duty cycle (the ratio of on-time to off-time) of the switching signal, the output voltage can be regulated and transformed to the desired level.

Is the Switch Mode Power Supply AC or DC?

A switching power supply is designed to convert one form of electrical energy into another. In most cases, the input to an SMPS is AC (alternating current), but the output is typically DC (direct current).

The switched power supply performs the necessary conversions to ensure that the output voltage is stable, efficient, and suitable for powering electronic devices that typically require DC power.

Where are Switching Power Supplies Used?

Switch mode power supplies are used in a wide range of applications due to their efficiency, compact size, and versatility. Here are some common areas where SMPS are used:

Consumer Electronics: Switch mode power supplies enable efficient power conversion for devices like TVs, game consoles, and laptops, contributing to smaller and more energy-saving electronics.
**Telecommunications: **These switch power sources power routers, switches, and other telecom equipment efficiently, ensuring reliable data transmission.
Industrial Applications: SMPS provide efficient power conversion for industrial control systems, robots, and various factory automation equipment, handling the global range of AC input voltages (100-240v).
Medical Equipment: Switch mode supplies can also be used in certain medical devices (where isolation is not critical).

Additional Applications:

Power Generators and Distributors: Switch mode power supplies can be used within these systems for efficient voltage regulation and distribution.
Automotive: They are increasingly used in cars for powering various electronic components due to their efficiency and ability to handle fluctuating voltage from the alternator.
Aerospace and Defense: SMPS power supplies can be found in aircraft and military equipment for precise voltage regulation in weight- and space-constrained environments.
Renewable Energy: In solar and wind power systems, switched power supplies can efficiently convert the variable DC output from solar panels or wind turbines to a stable DC voltage for use.
Home Appliances: Modern appliances like refrigerators and washing machines may utilize SMPS for efficient power conversion.
LED Lighting: Some SMPS like 24 or 12 volt switching power supplies are often used in LED drivers to efficiently convert voltage for powering LED lights.
Networking Equipment: Routers, switches, and other networking devices rely on SMPS for efficient power conversion.
Data Centres: Data centre servers and equipment utilise SMPS for reliable power delivery.
Gaming and Entertainment: Gaming consoles and entertainment systems benefit from the efficiency and compact size of a lower voltage level switch mode supplies, such as 5v switching power supply.

How to Order SMPS Power Supply from RS?

No matter if you’re looking for a 5V, 12V or 24V switching power supply, you can order from RS New Zealand, a trusted supplier and distributor of switch mode power supplies in NZ. We offer leading brands like Mean Well, TDK-Lambda, XP Power, TRACOPOWER, Cosel and more.

Ready to place an order? Browse RS NZ's vast collection of power solutions and find the perfect switch mode supply for your needs. Each product listing has detailed descriptions and datasheets to help you make an informed choice. Simply filter by input/output voltage, power rating, package type and more to find exactly what you're looking for.