Wall Plug Adapter Electronics

With all the certifications UL, ETL, FCC, CE, CB, GS, CCC, CQC, PSE, KC, KCC, SAA, RCM, etc.

After years of experience and technological improvements, Eahunt's current power adapters have a life expectancy of 100,000 hours, meeting the standard of 10,000 times plugging and unplugging without failure. This must be said to be a major breakthrough in power technology, so Eahunt is how to do it? What are the feasible methods?

Want to ensure the quality and life of the adapter, we must start thinking from the design before, so as to avoid the adapter will soon fail, which is a comprehensive issue of system design and consideration. In order to affect the performance of the adapter life including environmental characteristics, components and power to be characterized, integrated with the following aspects.

1, the impact of the actual application environment: high humidity environment, high temperature environment, dusty environment, strong magnetic environment, vibration environment

2, the impact of the power supply grid: unstable grid voltage input will cause impact on the components of the adapter, thus affecting the service life of the LED driver pulse.

3, insulation and installation of the impact: the correct installation of the product and good insulation will enhance the application of the adapter.

4, the impact of electrolytic capacitors: electrolytic capacitor sealing parts will leak out of the vaporized electrolyte, this phenomenon will be accelerated as the temperature rises, it is generally believed that the temperature rises 10 ℃, the leakage rate will be increased to 2 times. Therefore, it can be said that the electrolytic capacitor determines the life of the adapter device. If you choose 105 degrees, life of 10,000 hours of high-temperature electrolytic capacitors, according to the prevailing life of electrolytic capacitors to estimate the company's "every 10 degrees lower, the life doubled," then it is 95 degrees working life of 20,000 hours, working life of 40,000 hours at 85 degrees.

5, the impact of the number of switches: most adapters have a capacitor input type rectifier circuit, in the pass-through adapter, there will be an inrush current, resulting in fatigue of the switch contacts, triggering increased contact resistance and adsorption and other issues. Theoretically, in the adapter's life expectancy period, the number of switch on and off about 10,000 times.

6, inrush current protection resistor, thermal power resistor impact: in order to engage in the adapter into the inrush current, usually the design of the adapter will resistor and SCR and other components used in parallel. Adapter into the power peak up to tens of times the rated value to hundreds of times, resulting in resistance thermal fatigue, causing breakage. Thermal power resistors in the same situation also suffer from thermal fatigue.

In general, if you want to design a reliable and safe power adapter, it is not enough to rely on theoretical knowledge. Also need a lot of tests to verify, constantly to find problems, and then solve the problem. This is also an accumulation process, Eahunt after many years of accumulation, to reach today's power industry leading level.