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The design and production of switch mode power adapters should start from the main circuit, where the power conversion circuit is the core of the switch mode power adapter. The structure of a power conversion circuit, also known as a switching power supply topology, has multiple types. The topology also determines the corresponding PWM controller and output rectifier/filter circuit. The following is a general process for designing and manufacturing switch mode power adapters. 1. Determine the structure of the circuitWhether it is an AC/DC switching power supply or a DC/DC switching power supply, its core is a DC/DC converter. Therefore, the circuit structure of the switching power adapter refers to the structure of the DC/DC converter. The commonly used topology of DC/DC converters in switching power supplies is as follows:a) Buck Converter, also known as buck voltage regulatorb) Boost Converter, also known as Boost Voltage Stabilizerc) Flyback Converterd) Forward Convertere) Half Br...
2024
The full English name of PFC is "Power Factor Correction". A computer switching power supply is a capacitive input circuit. Since the maximum current and maximum voltage of AC power do not occur at the same time, the product of the power calculation formula "current x voltage" does not equal the power of the current work. In this case, we also need to multiply it by a coefficient, This coefficient is PFC, also known as power factor correction, and its value range is between 0 and 1. Basically, power factor can measure the degree to which electricity is effectively utilized, and the larger the power factor value, the higher its electricity utilization rate. There are currently two types of PFC, one is passive PFC (also known as passive PFC) and active PFC (also known as active PFC).Passive PFC is usually a large inductor composed of multiple silicon steel sheets wrapped with copper wires. Its principle is to use inductance compensation method to reduce the phase difference between the...
Module power supply is a power supply that can be directly mounted on printed circuit boards, providing power for specialized integrated circuits (ASICs), digital signal processors (DSPs), microprocessors, memory, field programmable gate arrays (FPGAs), and other digital or analog loads. Generally speaking, these types of modules are referred to as load (POL) power supply systems or point of use power supply systems (PUPS). Due to the obvious advantages of modular structure, modular power supplies are widely used in communication fields such as switching devices, access devices, mobile communication, microwave communication, optical transmission, routers, and automotive electronics, aerospace, etc.The selection of module power supply should consider the following points:1. Consider the output power of the product:1-60W, it is generally recommended that the actual power used is 30-80% of the rated power of the module power supply (the specific proportion is also related to other fac...
Generally speaking, the application architecture of fast charging adapters mainly includes three modules: AC-DC conversion module, power control module, and fast charging protocol module. Among them, the AC-DC conversion module is responsible for converting 220V AC power to DC power, the power control module is mainly used to adjust the DC voltage to the voltage required by the phone, and the fast charging protocol module is responsible for shaking hands with the phone to communicate, collecting voltage, current, and various information requested by the phone.CPW3301 not only integrates power control module and fast charging protocol module, shouldering the core task of the entire fast charging process, but also specifically solves a series of pain points of current power adapters in the market.Firstly, the power management module of CPW3301 has high integration and rich functionality. This chip integrates two of the three main modules of the fast charging adapter: the power control...
With the development of lithium battery technology, the market demand for low-cost and high energy storage portable energy storage devices is increasing, and many companies are developing such products. This article will introduce several common ADI portable energy storage power supply DC-DC charging and discharging solutions to meet the needs of the portable energy storage market and lithium-ion battery charging and discharging application scenarios. The solutions mentioned in the article are all market validated and mass-produced.1.LT8390-60V four tube lifting and lowering solutionLT8390 is a synchronous 4-switch buck boost DC/DC controller that can adjust output voltage, input or output current based on input voltage higher, lower, or equal to the output voltage. The proprietary peak buck/peak boost current mode control scheme supports adjustable and synchronous fixed frequency operation from 150kHz to 650kHz, or supports internal ± 15% delta spread spectrum modulation that...