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USB-C Adapter The Overall High Temperature, Corrosion Resistance Jul 20, 2017

The surface of the USB-C Adapter is painted and ground to produce a good feel and a refined look. Aluminum ring USB-C Adapter after anodized, the surface easy to clean, anti-corrosion. USB-C Adapter can be plugged more than 15,000 times, the hole for China, Japan and Europe standards. The conductive material of the USB-C Adapter is plated with nickel-plated nickel plating. The whole is resistant to high temperature and has high corrosion resistance, and has excellent electric conductivity.

Power USB-C Adapter During the development of new products, engineers are required to provide appropriate output overload protection for the USB-C Adapter in order to ensure that the USB-C Adapter is able to meet the operating requirements of different environments during operation and to provide continuous and stable current and voltage conversion to the user. The safe operation of the USB-C Adapter. Introduced two kinds of current application of a wide range of output overload protection technology

1. Constant power limit protection method

The constant input power limit protection method is one of the more common switching power supply output protection technologies. The protection principle of this method is to protect the primary circuit by limiting the maximum transmission power. However, in the flyback converter, this technique can hardly protect the secondary output element. For example, in a discontinuous flyback converter, the primary side peak current has been limited, that is, given the limited transmit power. When the load resistance is reduced and the load exceeds its limit, the output voltage begins to drop. It is precisely because the specified input and the corresponding output voltage and current product, when the output voltage began to decline, the output current will rise. In the short circuit, the secondary current will become very large, in the switching power supply in the consumption of all the power. This form of power limitation is generally only used as a supplement to some form of supplemental restrictions, such as secondary side current limiting.

2. Flyback super power limit protection method

Counterattack super power protection method is currently in the domestic USB-C Adapter R & D and manufacturers of the production process is more extensive, this protection technology is an extension of the form of speed, in this form there is a circuit to monitor the primary and secondary voltage , Reducing the power when the output voltage is reduced. In this way, when the load resistance decreases, the output current is reduced to prevent the secondary components from being subjected to excessive stress damage. The disadvantage is that a lock occurs when used for non-linear loads.

With the power USB-C Adapter (switching power supply) assembly density is getting higher and higher, bear the mechanical and electrical connection function of the solder joint size is getting smaller and smaller, and any one of the solder joint failure may cause the device or even switching power supply failure. Therefore, the reliability of the solder joint is one of the keys to the reliability of the power USB-C Adapter. In practice, the failure of solder joints is usually caused by the interaction of various complex factors, different use of the environment have different failure mechanism, the main failure mechanism of solder joints, including thermal failure, mechanical failure and chemical failure.

: Mechanical failure mainly refers to the mechanical shock caused by overload and impact failure and mechanical vibration caused by mechanical fatigue failure. When the printed circuit assembly of the power USB-C Adapter is subjected to bending, shaking or other stress, it may cause the solder joint to fail. In general, the smaller solder joints are the weakest link in the power supply assembly. When it is connected to a flexible structure with a pin-to-PCB component, the pin can not absorb a portion of the stress.