What does a high reliability on-board look like?(2)

A modular power supply is a power supply that can be directly mounted on a printed circuit board and can be used for application-specific integrated circuits (ASICs), digital signal processors (DSPs), microprocessors, memories, field programmable gate arrays (FPGAs) and other Digital or analog loads provide power. Typically, such modules are referred to as load (POL) power supply systems or point-of-use power supply systems (PUPS). Due to the obvious advantages of the modular structure, modular power supplies are widely used in switching equipment, access equipment, mobile communications, microwave communications, optical transmission, routers and other communications fields, as well as automotive electronics, aerospace, etc.

2: When selecting device parameters, space should be reserved, such as withstand voltage. It is not allowed to assume that the market voltage is 220V. Generally speaking, we should consider that the voltage may be as high as 265V or even higher. 

3: The circuit protection device must be designed, because without the circuit protection device, it is quite dangerous and has low reliability. 

4: A better circuit board design should also be able to apply three proofing paint. The so-called three proofing paint is moisture-proof, salt fog proof and mold proof. In addition, there is no dust protection and leakage protection. Even better, it is waterproof (IP67). 

5: on-board require CE and UL certification