The difference between PCBA and bottom plate + SOM

yiyi2023

IPQ4019-IPQ4029-IPQ5018-DR40X9-DR5018M are two versions designed by Wallys, namely PCBA and backplane + SOM, for more customers to choose. PCBA and backplane + SOM are different


PCBA (Printed Circuit Board Assembly) and backplane + SOM module (System on Module) are two different components in electronic equipment. They have some differences in function, design, use and application. Let's take a closer look at the differences between them:

PCBA (Printed Circuit Board Assembly):
A PCBA is a complete printed circuit board (PCB) on which various electronic components are mounted, such as chips, capacitors, resistors, connectors, etc. PCBA includes the entire process of soldering electronic components to a printed circuit board. It is the core part of electronic equipment, responsible for connecting and supporting various functional and control elements. The design and assembly of PCBA requires professional electronic engineering knowledge and skills.

Advantages of PCBAs:

Customization: PCBA allows developers to highly customize every aspect of the board, including component layout, circuit connections, dimensions, and more. This makes PCBAs suitable for projects that require specific functionality, performance, and appearance.

Cost control: In mass production, the cost of PCBA may be lower than SOM module because of the choice of affordable components and manufacturing methods.

Low Power Applications: For specific low power applications, components can be precisely selected to achieve higher energy efficiency.

Flexibility: Developers have more freedom to choose components that suit their needs, resulting in higher performance and functionality.

Backplane + SOM module (System on Module):

The SOM module is a highly integrated modular component, which usually includes one or more core processing units (such as CPU, GPU), memory, storage, network interface and other core components.

The SOM module itself is a relatively complete computing unit that can be used as the core processor of the entire system without the need to design and manufacture the entire PCBA. The backplane is the interface board that connects the SOM module with the outside world, including power supply, connectors, sensor interfaces, etc.
Advantages of backplane+SOM module:

Rapid development: Backplane + SOM module greatly simplifies the product development process, because key components such as core processing unit, memory, storage, etc. have been integrated in the SOM module. This reduces the time to design and debug from scratch.

Reduced risk: Using proven and tested SOM modules reduces technical risk during development, as the modules have been proven in many applications.

Fast time to market: The use of backplane + SOM module can shorten the time to market of products, so that they can enter the market faster.

Modular Maintenance: SOM modules allow for easier upgrades and maintenance. If the core processing unit or other components need to be updated, only the SOM module needs to be replaced without redesigning the entire PCBA.

Suitable for small-volume production: For small-scale production or prototype development, SOM modules can provide a more convenient solution without investing a lot of time and resources in designing PCBA.
the difference:

Design complexity: PCBA design needs to consider more factors, including component layout, circuit connection, signal interference, etc. The design of the SOM module is relatively simple, mainly focusing on the integration of the core processing unit and related components.

Modularity: The SOM module is a modular design, which can easily replace or upgrade the core processing unit by plugging in, thereby reducing the complexity of product design. PCBA requires more work to replace or upgrade components.

Time and cost: The use of SOM modules can speed up product development time, because many core functions have been integrated in the module, reducing the workload of designing from scratch. However, the cost of SOM modules may be relatively high. The development of PCBA may require more time and resources, but the cost can be better controlled.

Application scenarios: SOM modules are suitable for projects that require rapid development and a short time to market, such as prototype verification, small batch production, etc. PCBA is suitable for projects that require a higher degree of customization, high-volume production, such as consumer electronics, industrial equipment, etc.

In short, both PCBA and backplane+SOM modules are important components in electronic products, and which way to choose depends on factors such as project requirements, time, cost, and design complexity.

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