SLKOR compare switching power source topology introduction (1)

Events|Events|

2022-03-17 01:22:11 134

What is topology? The so-called circuit topology is the connection method of the power devices and the electromagnetic components in the circuit, and the design of the magnetic components, the design of the closed-loop compensation circuit, and the design of all other circuit components depend on the topology. The most basic topologies are buck, boost and boost/buck, asymmetric flyback, forward, push-pull, half-bridge and full-bridge converters.

There are about 14 common topologies for switching power supply topologies, each with its own characteristics and applicable occasions. The principle of selection is to see whether it is high-power or low-power, high-voltage or low-voltage output, and whether there are as few components as possible.

Therefore, to properly choose a topology, it is important to be familiar with the advantages, disadvantages and application areas of different topologies. The wrong choice can make diet design doomed from the start. The following summarizes 20 basic switching power supply topologies to help the system grasp the working principle and basic characteristics of each circuit structure.

一、Boost 升压

0fcd2dcba1dafd35f2baa0527cd9ab0b

Features: ■ Raises input to a higher voltage ■ Same as buck, but rearranges inductors, switches and diodes ■ Output is always greater than or equal to input (ignoring diode forward voltage drop) ■ Input current smoothing ■ The output current is discontinuous (chopping) 2. Flyback flyback

831bee611b525d42711eb01fdc70505d

Features: ■ Works like a buck-boost circuit, but the inductor has two windings, acting as both transformer and inductor ■ The output can be positive or negative, depending on the polarity of the coil and diode. ■ The output voltage can be greater or less than the input voltage, determined by the transformer turns ratio. ■ This is the simplest of the isolated topologies ■ Add secondary windings and circuits for multiple outputs

The above are the common switching power supply topologies, and there are many other topologies, but most of them are combinations or deformations of the topologies described here. Each topology contains unique design trade-offs. Share with you one after another.

SLKOR's semiconductor product line is increasingly enriched. Currently, it can be used in industrial products: silicon carbide SiC diodes, silicon carbide SiC MOS tubes, IGBTs, etc., which are widely used in new energy vehicles, communication equipment, power equipment, solar photovoltaic, UPS power supply, Medical equipment and other fields; civilian-grade consumer products include: thyristor, bridge stack, medium and low voltage MOS tubes, Hall HALL sensors, high-speed optocouplers, Schottky diodes, electrostatic protection ESD diodes, transient suppression TVS diodes, general-purpose Diodes, transistors, power management ICs, etc., are widely used in smart phones, laptops, smart robots, smart home appliances, LED lighting, 3C digital products and other fields. Sac Micro will launch more products to provide customers with more comprehensive and better services.

萨科微SLKOR立创商城热销产品

SLKOR hot-selling products on LCSC

Slkor's general-purpose diode m7, Schottky diode ss34,, triode (BJT) s8050, triode S8550, triode SS8050, linear regulator (LDO) ams1117-3.3 (sot-223), linear regulator (LDO) )ams1117-3.3 (sot-89), Schottky diode ss36, Sacco slkor operational amplifier lm321, etc. are sold well, more than 100 orders per week in Lichuang Mall, and the continuous display of Sacco products and slkor brands In front of electronic engineers and Sacco Micro customers. Sacco's micro-power device products can also be used in conjunction with the Beidou GPS antenna connector USB interface of Kinghelm, so that our customers can create benefits!

Prev:: The working principle and detection method of the IGBT field effect tube

Next:: What is the role of field effect tube?

SLKOR compare switching power source topology introduction (1)

Advisory Service