Power module customization analysis of the difference between switching power supply and module power supply

Power module customizationAnalyze the difference between switching power supply and module power supply: There are many types of switching power supply, and the module power supply is one of them, but there is no general explanation between the two.

The module power supply is a power supply that can be directly mounted on the printed circuit board. Because of the many advantages of the modular structure, the module power supply is widely used in switching equipment, access equipment, mobile communications, microwave communications, optical transmission, routers, etc. Communication field and automotive electronics, aerospace, etc.

The module power supply is only for replacement, replacement, and the convenience of use. The power supply length, width and height, pin distance and length are defined by some standards. There is no definition for the internal principle and structure, such as the four-port network that we learn from books. .

1. The principle of module power supply and switching power supply are the same, both adopt PWM control mode, and the converters are mostly the same.

2. Because AC/DC has input filtering, the device is relatively large, it is still difficult in the process of modularization, and DC/DC has been modularized very early.

3. The switching power supply is composed of pulse width modulation (PWM) control IC and MOSFET. The module power supply is composed of a power supply module and a small number of discrete components.

4. The components of the module power supply are mainly SMD, while the switching power supply is mainly DIP plug-in. The switching power supply mainly refers to the mesh shell power supply.

5. The module power supply adopts a fully sealed shell, which has good effects of anti-salt fog, anti-mold, anti-moisture, and anti-dust.

6. In terms of reliability, it mainly depends on what kind of circuit is used. The reliability of single-ended forward is generally higher, and the design of double-ended is more difficult.

7. In terms of overall performance, modular power supplies are better than switching power supplies. General military power supplies require the use of fully sealed power modules.

8. The development direction of switching power supply is volume miniaturization, and modular power supply is the general trend.

9. In terms of heat dissipation design, the contact surface of the module power supply during the main heat dissipation period is larger than that of the switching power supply. In addition, the module power supply is generally equipped with a radiator, which greatly reduces the temperature rise and improves the reliability of the power supply.

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