. Stands for Switch Mode Power Supply.
. Used in computer to supply regulated power to all of its components.
. It provides reliable output irrespective of variation in input voltage for proper functioning of your computer.
. In laptops, it is generally 19V and in desktops, it is 12V.
. 20/24 Pin ATX: It allows to turn motherboard on. Early models have 20 pin configuration, modern computers have 24 pin.
. 4 Pin ATX: It plugs into motherboard and exclusively powers on the processor.
. SATA: Modern power systems has 4 of these to power the drives in SATA standard.
. MOLEX: Commonly used in systems today. Used to power hard disk and other drives.
. Used in computer to supply regulated power to all of its components.
. It provides reliable output irrespective of variation in input voltage for proper functioning of your computer.
. In laptops, it is generally 19V and in desktops, it is 12V.
What it contains?
. Input Rectifier and Filter
. Inverter
. Transformer for voltage conversion
. Output Regulator
Input Rectifier:
. AC input from mains is first rectified into DC using Rectifier in SMPS.
. It uses full wave rectifier to produce unregulated DC output.
. Using Filter circuit, it removes unwanted signals of high frequency.
Inverter:
. In the next stage, it inverts the input DC to AC using power oscillator.
. Output is connected to Transformer to convert the voltage levels.
. Switching is done through MOSFET Amplifiers.
Transformer:
. In this stage, output from inverter is step down to get particular voltage level required by the terminals.
. To each end, if it needs DC as input, the output from the transformer should be rectified.
. It is filtered using Capacitors.
Voltage Regulator:
. In this stage, the voltage will be maintained constant even if there is variation in the input voltage.
. It supplies this constant voltage to the components.
. If it doesn't match, it sends the feedback to inverter to send required voltage to the transformer.
Different Pins from SMPS:
. It consists of different output power cable to which it is connected to different components.
. 20/24 Pin ATX: It allows to turn motherboard on. Early models have 20 pin configuration, modern computers have 24 pin.
. 4 Pin ATX: It plugs into motherboard and exclusively powers on the processor.
. SATA: Modern power systems has 4 of these to power the drives in SATA standard.
. MOLEX: Commonly used in systems today. Used to power hard disk and other drives.