Fast Pcb Prototyping Service

Description

Contract electronic assembly With the rapid development of power electronic skills, power electronic equipment has increasingly close contact with everyone's work and day, and electronic equipment can not do without reliable power supply. In the 1980s, computer power supply has fully completed the switching power supply. First of all, the power supply of computer has been replaced. In the 1990s, switching power supply has successively entered into various electronic and electrical equipment areas, such as program-controlled exchange, program-controlled exchange and so on Switching power supply has been widely used in communication, electronic testing equipment power supply and control equipment power supply, which promotes the rapid development of switching power supply skills. jlcpcb through hole assembly is a kind of power supply that uses modern power electronics skills to control the time ratio of switching transistors to register and turn off to maintain a stable output voltage. SMPS is usually composed of pulse width modulation (PWM) control IC and MOSFET. Compared with linear power supply, the cost of switching power supply and linear power supply increase with the increase of output power, but the increase rate of them is different. The cost of linear power supply is higher than that of switching power supply at a certain output power point. With the development and innovation of power electronics skills, switching power supply skills are constantly innovating. The turning point of the cost is increasingly moving to the low output power end, which provides a wide range of development space for Fast Pcb Prototyping Service switching power supply.

DC / DC replacement

DC / DC conversion is to change fixed DC voltage into variable DC voltage, also known as DC chopper. There are two working methods of chopper, one is the pulse width modulation method, TS unchanged, change ton (general), pcb fabrication assembly,the other is the frequency modulation method, ton unchanged, change TS (easy to disturb). The detailed circuits are divided into the following categories

(1) Buck circuit -- buck chopper, its output uniform voltage uo is less than input voltage UI, and its polarity is the same.

(2) Boost circuit -- boost chopper, its output uniform voltage uo is greater than input voltage UI, and its polarity is the same.

(3) Buck boost circuit -- buck or boost chopper, whose output uniform voltage uo is greater than or less than input voltage UI, opposite polarity, inductor transmission.

(4) Cuk circuit -- buck or boost chopper, its output uniform voltage uo is greater than or less than the input voltage UI, polarity is opposite, capacitance transmission.

Today's soft switching technology makes DC / DC take a qualitative leap forward. A variety of ECI soft switching DC / DC converters planned and manufactured by VICOR company of the United States have maximum output power of 300W, 600W, 800W, etc., corresponding power density of (6, 2, 10, 17) w / cm3 and power of (80-90)%. RM series of high frequency switching power supply module with soft switching technology is newly introduced by nemic lambda company of Japan. Its switching frequency is (200 ~ 300) kHz, and its power density has reached 27

W / cm3, using synchronous rectifier (MOS-FET instead of Schottky diode), the power of the whole circuit is improved to 90%.

PCB assembly display applications

PCB printing and assembly for medical device,PCBA for IT equipment, Open frame power supply for electrical home appliance.

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