- It uses a switching regulator to convert electric power efficiently.
- SMPS transfers electric power from a source ( AC mains) to the load by converting the characteristics of current and voltage.
- SMPS always provide a well regulated power to the load irrespective of the input variations.
The SMPS essentially has :
1. Input Rectifier: The AC input from mains is first rectified in the SMPS using a rectifier to convert it into DC
2. Inverter: This stage converts the rectified DC into AC using a power oscillator. The power oscillator has a small output transformer with a few windings at the frequency 20-100 kHz. Switching is controlled by a MOSFET amplifier.
3. Voltage Converter: It is an electric power conversion device which is used to change the electrical output of a power source.
4. Output Regulator: It generates a fixed output voltage of a preset magnitude that remains constant regardless of changes to its input voltage or load conditions.
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