The life of a power supply is just like the life of a human being. Predicting the exact number of years is impossible, but many data analysis reports have the concept of average life. The same is true for power supplies. Many factors affect its life, so the life of a power supply is generally measured by the average failure-free time.
The life of the power supply is mainly affected by the following factors:
1. The service life of the internal components and PCB
2. The entire welding and assembly process.
In design, the parameter selection of power supply components must be guaranteed, and in production, the consistency and operability of the entire welding and assembly must be ensured. This can ensure the stability and reliability of the power supply from the source.
The key point to ensure the life of the power supply!
We must reduce the possibility of failures to ensure the long-term and stable operation of the power supply. Then we must control two important parts of the power supply life cycle: power supply research and development and LED driver production. Power supply research and development needs to ensure that the performance of the power supply meets the requirements of our specification book and ensure the power supply performance indicators during the normal life cycle of the power supply. Power module products have high requirements for production processes and process control, and require high-quality production equipment and management to achieve the expected product quality.
Key materials to ensure the life of the power supply!
The life of the power supply and the components used also meet the barrel effect. The life of all components must reach the specified life to ensure the final service life of the power supply. Generally, key components are subject to large electrical stress, high heat generation, and fast temperature rise inside the machine. The component's life is closely related to temperature, so evaluating the component's life is very important and necessary. So what key components in our power supply need special attention?
1. Electrolytic capacitor
Electrolytic capacitors are the most temperature-sensitive devices among power supply devices. From this perspective, the quality of electrolytic capacitors also determines the life of the power supply device to a certain extent, and AC-DC power supply products perform most prominently.
2. Primary switch tube (MOS tube)
This type of switching device is in a high-speed switching state and is subject to high voltage stress and current stress. The heat caused by switching loss will also accelerate the aging of the device, and it is also susceptible to external high-voltage interference and breakdown damage.
3. High-frequency power transformer
When the high-frequency transformer transmits energy, the internal loss will cause it to heat up, and the heat dissipated will also affect the life of the transformer material. Common transformer failures include: bushing failure, winding failure, core failure, etc., etc.
4. Multilayer ceramic capacitors
The most common problem with SMD ceramic capacitors is the solder joints of the capacitors, which may break due to some stress. Avoiding the parallel use of multiple ceramic capacitors can minimize the possibility of this problem.
5. Output rectifier diodes
The diodes are mainly subjected to two major electrical stresses, including reverse withstand voltage and forward current. At the same time, the diodes are also heating devices. To ensure the service life of this device, sufficient margin is reserved during the design to ensure the batch performance of the power supply.
6. Optocouplers
The current transfer ratio (CTR) will gradually decrease over time. To maintain the loop's stability, the light-emitting diode's current will continue to increase and eventually reach its limit value, causing damage to the optocoupler.
It can be seen that the value of the manufacturer's process level plays a decisive role, because this is the key link to ensure the quality of mass production, and the value of the power module complements each other. In this way, customers can also use safe and reliable products, thereby reducing the purchase and maintenance costs of the products.
Our company has been producing high-quality power supplies since 2006, you can choose with a 3/5/7 year warranty!
