Simple Definition
A power supply is a device that converts electrical energy from one form to another, ensuring that electronic devices receive the correct voltage and current to function properly. It acts as a bridge between a power source (such as a wall outlet or battery) and the device it powers, regulating and stabilising electricity to prevent damage.
A Real-Life Example
Think about your laptop charger—it doesn’t just transfer power from the wall to your laptop. The bulky block in the middle is the power supply. It converts high-voltage AC power from the wall into low-voltage DC power that your laptop needs to operate safely.
Now, compare this to a phone charger. A standard wall charger has a built-in power supply that regulates voltage and provides a steady output, typically 5V at 2A or more, ensuring fast charging.
But what happens when you charge your phone in a car using just a simple USB cord plugged into a port? Many car ports only provide 1A of power, meaning your phone charges much slower. This is because it lacks a proper power supply to regulate and boost the output, demonstrating why a dedicated power supply is critical for efficient operation.
A More Technical Definition
A power supply performs three primary functions:
- Voltage Conversion – Converts power from an AC source (like a wall outlet) or a DC source (like a battery) into a usable voltage level for a device.
- Regulation – Ensures the output remains stable and within safe operating limits, protecting sensitive electronics from surges, drops, and noise.
- Current Limiting & Protection – Prevents excessive current draw, which could damage components or create safety hazards.
There are different types of power supplies, including:
- Linear Power Supplies – Provide smooth, stable power but tend to be larger and less efficient.
- Switch-Mode Power Supplies (SMPS) – Highly efficient, compact, and commonly used in modern electronics, including laptops and industrial equipment.
Patriot Power Supplies – Reliable DC & AC Solutions
At PSS Distributors, we provide high-quality Patriot Power Supplies designed for a range of applications. Our range includes:
- 12V, 24V, and 48V DC power supplies – Ideal for security systems, automation, telecommunications, and industrial equipment.
- 24V AC power supplies – Commonly used in HVAC systems, CCTV cameras, and access control applications.
- Custom solutions – you can work with our technical teams to build the perfect solution for you, here is an example of a project we recently worked on.
With over 30 years of expertise, PSS ensures that your devices receive the correct, stable, and reliable power they need to perform at their best.
Looking for the right power supply for your project? Contact PSS Distributors today for expert guidance and high-performance solutions.
