Power adapter products are widely used. The most common power sources in life, such as mobile phones and computers, will be used in communication, medical treatment, led, security and other fields. Today, I will briefly introduce the characteristics and classification of power adapter products in various industries
communication
High reliability, high temperature, lightning protection and large voltage fluctuation. For example, the power supply system used by J office terminal equipment is generally 48V output; Various base station amplifiers generally use more 3.3V, 5V, 12V and 28V power supplies. 3.3V and 5V generally have chips, 12V fans and 28V output power amplifiers.
Instruments and Apparatuses
Generally, there are a large number of output channels. To prevent mutual interference between groups, it is required that the voltage stabilization accuracy of the power supply should be high, and some need to be isolated. (some of the input voltage is DC, and some of the frequency of ships or aircraft is 440hz). Some instruments, such as oxygen generator and hydrogen generator, also need constant current power supply, and have little requirements for leakage current.
Security
It is generally used in conjunction with battery charging, such as 12V, 13.8V and 13.8V. It is generally charged with battery. After AC power failure, it is switched to 12V battery for power supply.
Optical fiber
Network switches generally use more combinations of 3.3V, 5V and 3.3V 12V. 3.3V is generally equipped with chips. The power varies according to different types, and the voltage stabilizing accuracy is high. 5V and 12V are equipped with fans, the current is very small, and the voltage stabilizing accuracy does not need to be very high
medical care
High safety requirements, small leakage current and high withstand voltage.
LED display
It has good dynamic response and high temperature resistance. Some may require large overcurrent points, such as 5v30a, 5v50a power supply and LED decoration. Because of the luminous requirements, it basically needs constant current to achieve uniform luminous brightness.
Tax control
The new industry is controlled by the government, and the production volume may be large. Except for a few, it basically uses 5V 24V combined power supply, 5V for the main chip and 24V with printer. It needs to cooperate with the whole machine for EMC.
Set top box
Generally, there are many channels, the typical voltage is 3.3V, 5V / 12V / 22V, 30V, or some ATX standards, the current of each channel is very small, the total power is generally about 20W, and the price is required to be low. The power supply power of some set-top boxes with hard disks will exceed 60W.
LCD TV
There are usually more than 3 channels of 24V / 12V / 5V, 24V with LCD; 12V with sound system; 5V with TV control board and STB
