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  • SMT PCB Assembly process dispensing process and technical requirements

    SMT PCB Assembly process dispensing process and technical requirements

    Abstract: In the entire production process of electronic products, one side of the PCB components are dispensed and cured from the beginning to the end before wave soldering can be carried out. During this period, the interval is longer and there are many other processes. The curing of the compon...
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  • Summary of DC-DC switching power supply design in PCB design

    Summary of DC-DC switching power supply design in PCB design

    Table of content 1. Deal with the feedback loop 2. The feedback line is rather thin than thick 3. All capacitors are as close as possible to the IC 4. The inductance is selected according to the 120-130% capacity of the specification 5. The capacitor is selected according to the 150% capacity of ...
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  • Twenty switching kinds of power supply PCB topologies (1)

    Twenty switching kinds of power supply PCB topologies (1)

    Table of content 1. Comparison of 20 switching power supply PCB topologies 2. Basic pulse width modulation waveform 3. Buck 4. Boost 5. Buck-Boost   What is topology? Circuit topology is the connection mode of power devices and electromagnetic components in the circuit. The design of magnetic com...
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  • Common appearance defects and solutions of PCB copper clad laminates and bonding sheet(4)

    Common appearance defects and solutions of PCB copper clad laminates and bonding sheet(4)

    Common defects and solutions of epoxy glass cloth based bonding sheet 6) Exposure pattern The main reason for the exposed pattern is that the resin content of the adhesive sheet is too small. If the copper foil is pressed close to the PCB copper clad laminate, the obvious pattern will be seen fr...
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  • What is PCB Assembly production process

    What is PCB Assembly production process

    Abstract: In the PCB Assembly production process, a lot of production equipment is needed to assemble a circuit board. The processing capacity of a PCBA processing plant is determined by the performance level of its production equipment. The basic production equipment required for PCBA production...
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  • What principles should be followed in PCB differential signal design

    What principles should be followed in PCB differential signal design

    Abstract: In high-speed PCB circuit design, PCB differential signal design is more and more widely used. Compared with ordinary single-ended signal routing, differential signal has the advantages of strong anti-interference ability, effective suppression of EMI, and accurate timing positioning. T...
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  • How to meet EMC and EMI requirements when designing PCB

    How to meet EMC and EMI requirements when designing PCB

    Abstract: Electromagnetic compatibility (EMC) is a headache for many PCB board design engineers, including electromagnetic interference (EMI) and electromagnetic susceptibility (EMS). How to make your PCB layout design meet EMC requirements as much as possible without causing too much cost pressu...
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  • What principles should be followed for pcb copy board

    What principles should be followed for pcb copy board

    Abstract: PCB copying is a very tedious task. If you are not careful, mistakes will be copied and the circuit board can no longer be used. So, what are the principles to be followed in the process of PCB copying?Here are some tips when pcb copy board. Table of content 1. Choose the appropriate pr...
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  • What are the different classifications of PCB boards?

    What are the different classifications of PCB boards?

    Abstract:PCB board is the base material, which is finally composed of copper foil and P sheet (bonding sheet), because these two substances have many classifications due to different applications. The following are some basic classifications of pcb boards. Table of content 1.The resin adhesive us...
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  • Some tips to improve the heat dissipation of PCB for LED display

    Some tips to improve the heat dissipation of PCB for LED display

    Abstract: LEDs can be seen everywhere, so what are the techniques for heat dissipation? In practical applications, increasing the heat dissipation of the PCB for LED display not only effectively improves the efficiency of the heat dissipation of the LED display, but also saves power, and is more ...
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  • Why is halogen-free PCB required now?

    Why is halogen-free PCB required now?

    Abstract: Halogen-free PCB means that the substrate used is made of halogen-free raw materials, and the produced PCB board is called halogen-free PCB board. Halogen-free board is an environmentally friendly material. The following Kingford introduces in detail what halogen-free PCB is.   Content:...
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  • Common causes of howling in switching power supplies (2)

    Common causes of howling in switching power supplies (2)

    Abstract: This article continues from the previous issue to explain the common causes of switching power supply whistling. table of Contents 4. The ground wire of the reference voltage regulator IC TL431 is faulty 5. When no load or very light load 6. When there is no load or the load is too lig...
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