1. Chip IC
The chip does not have a core component in the power supply. It is recommended to choose a top tier brand to ensure a balance between performance, process, and cost. We generally choose to use AC-DC power adapter chips made by Angbao, Silicon Lijie, and Xinpeng Microelectronics
2. Electrolytic capacitors
Electrolytic capacitors are temperature sensitive components in power adapter devices. From this perspective, the quality of electrolytic capacitors also determines the lifespan of power devices to a certain extent. The performance of AC-DC power adapter products is outstanding
3. Primary switching transistor (MOS transistor)
This type of switching device is in a high-speed switching state and experiences high voltage and current stress The heating caused by switch losses can also accelerate the aging of devices and make them susceptible to external high voltage interference and breakdown damage
4. High frequency power transformer
High frequency transformers generate heat due to internal losses during energy transmission, and the emitted heat also affects the lifespan of the transformer material Common transformer faults include insulation breakdown, winding burnout, copper wire breakage, etc
5. Multilayer ceramic capacitors
The area where surface mount ceramic capacitors are prone to problems is at the solder joints, which may crack due to some stress To minimize the possibility of occurrence, it is recommended to avoid parallel use of multiple ceramic capacitors as much as possible
6. Output rectifier diode
Diodes mainly bear two major electrical stresses, including reverse withstand voltage and forward current, and they are also heating devices To ensure the service life of this device, we will provide sufficient margin in the design to ultimately guarantee the batch performance of the power adapter
7. Optocoupler
The current transfer ratio (CTR) will gradually decrease over time. In order to maintain loop stability, the current of the light-emitting diode will continue to increase and eventually reach its limit, causing damage to the optocoupler
