Which circuit is used in SMPS?
A switched-mode power supply (SMPS) is an electronic circuit that converts power using switching devices that are turned on and off at high frequencies, and storage components such as inductors or capacitors to supply power when the switching device is in its non-conduction state.
What is soft start in SMPS?
Soft start is the gradual turning on of an electronic power supply to avoid stressing the components by the sudden current or voltage surges associated with the initial charging of capacitors and transformers.
Which circuit is used in SMPS for voltage regulator?
The voltage regulation in SMPS is obtained by the feedback circuit. The feedback circuit takes input from output DC voltage and gives output to chopper controller.
What is a soft-start circuit?
A Soft Start Circuit prevents the sudden current flow in the circuit during the start. It slows down the rate of rising output voltage by minimizing the excess current flow during the start. It is useful to protect the devices or electronic components from the damage caused by instantaneous high input current.
What is meant by current limit?
Current limiting is the practice of imposing a limit on the current that may be delivered to a load to protect the circuit generating or transmitting the current from harmful effects due to a short-circuit or overload. The term “current limiting” is also used to define a type of overcurrent protective device.
What is the main function of SMPS?
SMPS is the abbreviation of switching mode power supply, a kind of high-frequency power conversion device and a power supply device. Its function is to convert a level of voltage to the voltage or current required by the client through different forms of architecture.
Which type of transformer is used in SMPS?
Most SMPS topologies will use a 2-coil transformer, while others (e.g., bridge or LLC) will use a 3-coil transformer. A 3-coil transformer is often used to provide multiple output power levels from a single SMPS circuit.
Why chopper is used in SMPS?
In general, an SMPS initially converts the ac source voltage into a dc voltage through a rectifier and an input filter. Then a chopper “chops up” the dc voltage, so that a voltage composed of a series of square-wave high-frequency pulses (20 kHz–10 MHz) can be generated at the input of the transformer primary winding.