SMPS(SWITCH MODE POWER SUPPLY)

A mode switching power supply (the power supply, SMPS, or simply switch the mode change) is a power electronics unit (PSU) that required for a switching regulator output voltageAlthough word "to provide food includes" first-use line is associated with radio / network, which means the strength of feeling that provides a battery is a power source. This is just a tool, which is (normally) accepts commercial AC power and provides one or more DC outputs. This place was known as a power converter, but access is long established. While food term "" is in use since the first time line associated with radio / network does not mean that means that a battery provides the power is a power source. This is just a tool, which is (normally) accepts commercial AC power and provides one or more DC outputs. This place was known as a power converter, but access is long established.

Advantages and Disadvantages

The main advantage of this method more efficient because of its active region when the switching transistor dissipates little power outside (ie, when transistor works like a switch and either he or one with a negligible voltage drop across the current of negligible through). Other advantages of small size and light weight (low frequency transformers which have a high weight to eradicate) and greater efficiency due to less heat production is included. Loss more complexity, low electromagnetic interference filters block nearby (EMI) to avoid generating large amplitude, high frequency energy, and a switching frequency voltage ripple and harmonic frequencies of the analogous involved. Very low noise power duo again cost SMPS power line network to change, one may be due to interference with / V devices connected to a single phase. Non power factor corrected also cause harmonic distortion SMPSs

Theory of operation

If the SMPS is an AC input, DC input, the first step is changing. This amendment is known as. Rectifier circuit by adding a switch configured as a voltage doubler can be operated manually or automatically. For the convenience of this large supply nominal 120 V or 240 V supply operation is allowed. Rectifier DC voltage produced an irregular shape to a large filter capacitor is sent. AC mains supply voltage rectifier circuit current peaks around the smell is less. The high frequency energy pulses is important that reduces power factor. Special control techniques can be used by the SMPS below average input current follow the sinusoidal voltage AC input power factor for force planners should try to do right. DC input does not need this step with an SMPS. Often one AC ready for input from a DC source (330 V DC 230 V AC can run SMPS) as a forum through DC rectifier is unchanged. Before trying this, but proper advice manuals, although most such an operation of supply are very competent, though nothing is mentioned in the document. However, the full charge for use in rectifier diode rectifier stage as a half of use can be harmful for. This can cause overheating of the components, and it failed prematurely. 3 [] When using a switch input range of rectifier voltage when a low voltage level, typically (~ 120 V AC) is configured to function as an operating and a doubler rectifier to go to as high voltage (240 ~ V AC) are included. If a switch does not use input range, a full wave rectifier is usually used just enough to slump and investors flexible is designed to accept DC voltages for the larger stage are produced by the rectifier . The power SMPSs automatically limit certain types of change can be done.