source:power adapter Popular:adapter release time:2021-10-27 09:43:21 Article author:sznbone
There is a certain relationship between the service life of the power adapter and the components, and the ultimate service life of the power supply can only be guaranteed when the service life of all components reaches the specified service life. So what are the key components in the power adapter that are particularly important? Let's follow the power adapter manufacturers to learn about it!
1. Electrolytic Capacitor
The electrolytic capacitor is a temperature-sensitive device in the power adapter device. From this perspective, the quality of the electrolytic capacitor also determines the life of the power supply device to a certain extent, and the performance of the AC-DC power adapter product is outstanding.
2. Primary switch tube (MOS tube)
Such switching devices are in a high-speed switching state and are subject to high voltage stress and current stress. The heat caused by the switching loss will also accelerate the aging of the device, and at the same time, it is also susceptible to breakdown and damage due to external high voltage interference.
3. High frequency power transformer
When high-frequency transformers are transmitting energy, internal losses will cause them to generate heat, and the heat radiated will also affect the life of the transformer materials. Common transformer faults include insulation breakdown, winding burnout, and copper wire breakage.
4. Multilayer ceramic capacitors
SMD ceramic capacitors are prone to problems in the solder joints of the capacitors, which may crack due to some stress. In order to minimize the possibility of occurrence, it is recommended to avoid the parallel use of multiple ceramic capacitors.
5. Output rectifier diode
The diode mainly bears two major electrical stresses, including the reverse withstand voltage and the forward current, and the diode is also a heating device. In order to ensure the service life of this device, we will flow out enough margin during the design, and ultimately ensure the batch performance of the power adapter.
6. Optocoupler
The current transfer ratio (CTR) will gradually decrease over time. In order to keep the loop stable, the current of the light-emitting diode will continue to increase and eventually reach its limit value, resulting in damage to the optocoupler.
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