PIB100G 3BEE0226 Circuit interface board module ALSTOM

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Essential details：PIB100G 3BEE0226 Circuit interface board module ALSTOM

A power supply module is a power supply that can be mounted directly onto a printed circuit board (see Figure 1). It is characterized by the ability to provide power for application specific integrated circuits (ASics), digital signal processors (DSPS), microprocessors, memory, field programmable gate arrays (FPgas), and other digital or analog loads. Generally, such modules are called point-of-load (POL) power supply systems or point-of-use power supply systems (PUPS). Because the modular structure has many advantages, so the high performance telecommunication, network connection and data communication systems are widely used in various modules. While there are many advantages to using modules, engineers often ignore reliability and measurement issues when designing power modules and even most on-board DC/DC converters. This article will explore these problems in depth and propose relevant solutions.

Figure 1. Power supply

First, the advantages of the power module

At present, different suppliers have launched a variety of different Psus in the market, and different products have different input voltage, output power, function and topology structure. Psus are superior to integrated solutions because they save development time and allow products to be brought to market faster. The power module also has the following advantages:

● Each module can be rigorously tested separately to ensure its high reliability, including power-on testing in order to weed out substandard products. In contrast, integrated solutions are more difficult to test because the entire power supply system is closely linked to other functional systems on the circuit.

● Different suppliers can design modules of the same size according to existing technical standards, providing a variety of different options for engineers designing power supplies.

● Each module is designed and tested in accordance with the provisions of standard performance, which helps to reduce the risk of adopting new technology.

● If the integrated solution is used, once there is a problem with the power supply system, the whole host board needs to be replaced; If the modular design is adopted, the problem module can be replaced, which helps to save cost and development time.

PIB100G-3BEE0226

Two, easily ignored power module design problems

Although the modular design has the above advantages, but the modular design and even the board DC/DC converter design also has its own problems, many people do not know enough about these problems, or do not give enough attention to. Here are some of the questions:

Measurement of output noise;

● Magnetic system design;

● Breakdown of synchronous step-down converter;

● Reliability of the printed circuit board.

Each of these issues will be discussed in the following article, along with a variety of simple techniques to solve them.

Three, the output noise measurement technology

All power supplies with switching mode emit noise. The higher the switching frequency, the more necessary it is to use correct measurement techniques to ensure the accuracy and reliability of the measured data. When measuring output noise and other important data, the Tektronix probe probe (commonly referred to as the cold nozzle probe) shown in Figure 2 can be used to ensure that the measurements are accurate, reliable, and as predicted. This measurement technique also ensures that ground loops are minimized.

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