The main components of a switched mode power supply are:
A switched mode power supply (SMPS) is an electronic power supply that utilises a switching regulator to convert electrical power.
This type of power supply is much more efficient than a linear power supply due to the fact that it only draws current from the source when it is required, as opposed to continuously drawing current.
SMPS’s are also much smaller in size and weight than linear power supplies, making them ideal for use in portable electronic devices.
There are a wide variety of SMPS topologies available, each with its own advantages and disadvantages.
The most common types are flyback, forward, push-pull and current-fed.Switching regulators are also used in a number of other applications such as DC-to-DC conversion and LED lighting.
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A switched mode power supply (SMPS) is an electronic power converter that uses a switching regulator to convert electrical power efficiently. SMPSs are typically used to power electronic devices and can be found in a wide variety of applications, from personal computers to cell phones.
SMPSs work by first converting the input AC power to DC power, then using a switching regulator to convert the DC power to AC power at a higher voltage. The switch allows the conversion to take place quickly and efficiently, making SMPSs much more efficient than traditional linear power supplies.
SMPSs are available in a wide range of voltages and outputpower levels, making them suitable for powering anything from delicate electronic devices to heavy-duty industrial equipment. In addition, SMPSs can be designed to be highly efficient, meaning that they waste very little energy as heat.
Overall, SMPSs are a versatile and efficient way to convert electrical power, making them well-suited for a wide variety of applications.
The working of SMPS
There are four types of SMPS: flyback, forward, push-pull, and current-fed.
Flyback converters are the most common type of SMPS. They use a transformer to store energy during the off cycle and release it during the on cycle. This results in a very efficient converter with low parts count.
Forward converters are similar to flyback converters, but they do not use a transformer. Instead, they use an inductor to store energy.
Push-pull converters are more complex than flyback or forward converters, but they have the advantage of being able to deliver much higher power levels.
Current-fed converters are the most complex type of SMPS. They are able to deliver very high power levels, but at the expense of much higher parts count and complexity.
-smaller in size compared to conventional DC supply
-light weight and compact
- wide output range
-low heat generation
-better power efficiency (typically 60 to 70 percent)
-size and cost of the transformer used is less
-less sensitive to input voltage variations
-less affected by electromagnetic interferences
-provides isolation between multiple output
-reduced the harmonic feedback into the supply mains
-expert design are required
-expensive compared to LPS
-greater circuit complexity
-higher frequency electrical noise
- higher output ripple
-its regulation is worse
-only one output voltage
-used only as a step down regulator
-produces electromagnetic interference
-harmonic distortion
Switched mode power supplies are used in a variety of applications where mains electricity needs to be converted into a different form.
One common application is in personal computers, where an SMPS is used to convert AC into the DC voltage needed to power the components.
Space stations also rely on SMPSs to provide power, as they need to be able to convert the alternating current from the solar panels into direct current for storage.
Electric vehicles also use SMPSs, as they need to convert mains AC into the high-voltage DC used to charge the batteries.
In addition, mobile battery chargers and security systems often use SMPSs to provide a reliable power source.
SMPS is an electronic power supply that uses a switching regulator to convert electrical power. This regulates the output voltage or current by electronically switching the input voltage back and forth at high frequency.
SMPSs are much more efficient than linear power supplies because they don't dissipate energy as heat in a series pass transistor. The transistor acts like a switch, allowing current to flow or blocking it, so it's either ON or OFF. When the transistor is ON, current flows through to the load; when it's OFF, no current flows, because the transistor spends very little time in the transition between these two states, very little energy is wasted in heating up the transistor. This efficiency can be as high as 60-70%, compared to only 50-60% for linear power supplies.
Linear power supplies use a transformer to convert the AC line voltage into a lower DC voltage. The DC voltage is then rectified and filtered to produce DC voltage. The main disadvantage of linear power supplies is that they are not as efficient as SMPSs because they dissipate energy in the form of heat in series pass transistors. In addition, linear power supplies are larger and heavier than SMPSs because they use larger transformers.
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When choosing a switched mode power supply (SMPS), there are several important factors to consider.
First, you need to determine the wattage rating that you need. This will be determined by the power requirements of the devices that you will be powering with the SMPS.
You also need to decide on the form factor of the SMPS. This includes the size, shape, and connector type.
Next, you need to select the right voltage and current ratings for your needs.
Finally, you need to decide on the features that you want, such as over-voltage protection or remote control.
By taking all of these factors into consideration, you can be sure to choose the right SMPS for your needs.
Founded in 2008, Kegu Power is a high-tech enterprise integrating R&D, production, sales and service of LED drive power.Our top-of-the-line LED drivers are designed to provide optimum power and performance for your LED lighting needs. Whether you're looking for a commercial or residential solution, Kegu Power has you covered.
