source:Industry News Popular:adapter release time:2021-12-24 09:26:21 Article author:sznbone
The power adapter is an indispensable electronic product in our lives. We use it for charging almost every day. Although the design seems to be very simple, the power adapter is actually composed of many sophisticated electronic components. If it is simply divided, there should be It consists of four parts. Today, the charger manufacturer will talk with you about the components of the power adapter?
1. Main circuit: mainly includes the following parts
(1). Inrush current limit: limit the inrush current on the input side at the moment of turning on the power.
(2), input filter: its function is to filter the clutter that exists in the grid and prevent the clutter generated by the machine from being fed back to the grid.
(3). Rectification and filtering: Directly rectify the AC power of the grid into a smoother DC.
(4) Inverter: Convert the rectified direct current into high-frequency alternating current, which is the core part of the high-frequency switching power supply.
(5). Output rectification and filtering: Provide stable and reliable DC power supply according to the needs of the load.
2. Control circuit: On the one hand, samples are taken from the output terminal and compared with the set value, and then the inverter is controlled to change its pulse width or pulse frequency to stabilize the output. On the other hand, according to the data provided by the test circuit, it is protected Circuit identification, providing a control circuit for various protection measures for the power supply.
3. Detection circuit: Provide various parameters and various instrument data in the protection circuit that are running.
4. Auxiliary power supply: Realize the software (remote) start of the power supply, and supply power for the protection circuit and control circuit (chips such as PWM).
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