PCBA is the abbreviation of Printed Circuit Board Assembly in English, which means that the empty PCB board passes through the SMT assembly, and then passes through the entire manufacturing process of the DIP plug-in, referred to as PCBA. The following Sanjing will introduce to you in detail:

Three-in-one board: A three-in-one board is a board that lacks lithium battery protection in order to save costs. Its basic functions include over-discharge, over-charge, over-current, short-circuit, under-voltage, etc. All functions are concentrated in the IC. Once the IC is damaged, it may cause the PCBA board to lose control. If the IC fails during the charging process, it is possible that the circuit is still connected. Without IC overcharge protection, the power supply will continue to charge when it is fully charged, which will cause the battery to overcharge and heat up, or even cause the battery to burn or explode in severe cases. .

With lithium battery protection board: PCBA with lithium battery protection is equivalent to double protection. Its basic functions are the same as the three-in-one board, including over-discharge, over-charge, over-current, short-circuit, and under-voltage. In the case of damage to the large IC, two small ICs can control the entire circuit. After the power supply is full, the circuit will be automatically disconnected to protect the circuit and avoid greater losses.

Leftover material: The so-called leftover material is the waste material discarded by the placement machine when mounting the PCB, or the waste material removed during the repair process, which can be recycled and reused. However, this kind of electronic scrap is not unified, and the accuracy of the materials is different. It may not reach the minimum required accuracy, and may even cause PCBA to fail to work properly and leak electricity.

Ordinary single-cell board: The input voltage is generally 5V, the current is 1A (±200MAH), the output voltage is generally 5V, and the current is 1A (±200MAH). 1A input is equivalent to charging 1000MAH to the power supply in one hour, and the normal battery voltage is generally between 3.7V and 4.2V. PCBA undergoes a boost function, so the output voltage of the power supply is 5V. It is normal if the PCBA has a slight heat.

Board cost performance: Board cost performance includes the quality and price of the board, and quality and price are often directly proportional. Generally, when quoting customers, they will give priority to the upper-middle price and report them to customers for reference and comparison. If customers pursue lower prices, they should meet customer requirements and choose boards that match their prices.

The above is the basic knowledge about PCBA board, I hope it can be helpful to everyone!