The life of the power adapter is not predictable, so the life of the general power supply is measured by the average time without failure. So what key components do we need to focus on to judge their service life?The following is YHY power supply to tell you.
Electrolytic capacitors are temperature-sensitive devices in power adapter devices. From this point of view, the quality of electrolytic capacitors also determines the life of power devices to some extent. AC-DC power adapter products are outstanding in performance.
2. Primary switching tube (MOS tube)
This kind of switching device is in high speed switching state, which is subject to high voltage stress and current stress. The heating caused by switching loss will also accelerate the aging of the device, and it is also vulnerable to external high-voltage interference and breakdown damage.
3. High-frequency power transformer
High frequency transformer in the energy transmission, the internal loss will lead to its heat, the heat will affect the life of the transformer material. Common transformer failures include breakdown of insulation layer, winding burn, copper wire fracture and so on.
4. Multilayer ceramic capacitor
A problem area for chip ceramic capacitors is the solder joint of the capacitor, which may crack due to some stresses. In order to minimize the possibility of this, it is recommended to avoid the parallel use of multiple ceramic capacitors.
5. Output rectifier diode
Diode is mainly subjected to two major electrical stress, including reverse voltage and forward current, and diode is also a heating device. In order to ensure the service life of this device, we will be designed to outflow sufficient margin, and ultimately ensure the batch performance of the power adapter.
6. Optical coupler
The current transfer ratio (CTR) will decrease over time, and in order to keep the loop stable, the current of the LED will continue to increase, eventually reaching its limit, resulting in photocoupling damage.
To sum up, the value of the power adapter module is not with the module itself, but to ensure the quality of the batch technology level. What consumers need is the safety and reliability of power adapters to reduce production and maintenance costs.
