19.5V 3.3A AC DC Power Adapter for Sony

19.5V 3.3A AC DC Power Adapter for Sony

• The switching power adapter is generally composed of a housing, a power transformer and a distillation circuit. There is usually a nameplate on the power adapter, which indicates the allowable power, input/output voltage/current, etc. The nominal voltage on the power adapter refers to the voltage when the power is not connected to the load outside the power supply. It is also the maximum voltage that the power supply can output. Knowing the composition of the switch power adapter, you will have a direction for repair in case of failure. First of all, you can check whether there is a line fault, to see whether the power line is damaged, whether there is oxidation at the contact port, whether the input and output lines are energized, if these phenomena, then the replacement of the power line can solve the problem. Then there will be output voltage too high or too low. 

• The output voltage may be too high if there is a problem with the voltage regulator sampling or the voltage regulator control circuit. In the case of short circuit of switching power supply load, failure of filter capacitor or rectifier diode at output voltage end, and increase of internal resistance of power supply, the output voltage is too low. This situation can be targeted to solve. Sometimes the fuse is normal but has no output voltage, so it is time to check the starting voltage of the boot to see if there is a leakage. Another case is the safety of the burn off, the checkpoint is the rectifier bridge, each diode, switches and large filter capacitor, but also because of interference circuit problems. Especially the breakdown of the switch tube, not only is the burn out insurance, more likely to burn out the power supply of the control chip, current detection resistance, thermistor, etc., it can also be said that the entire power adapter can be scrapped. Above is the basic knowledge of switching power adapter, switching power adapter needs to operate in a stable environment, the general use should pay attention to voltage protection, to avoid no-load, short circuit protection, in case the switch power adapter burned out.

• Shenzhen Waweis Technology Co., Ltd. is a high-tech enterprise engaged in r&d, production and sales of notebook adapters. Main: switch power supply, power adapter, charger, LED power supply and other products professional production and processing. The products have passed UL, CE, FCC, KC, PSE, SAA, GS and other certifications. The products produced by the company have perfect protection function, stable performance, safe and reliable. With professional r & d, production and sales experience, the company has accumulated strong technical advantages and rich market resources in the field of power adapters. The company is now able to provide a full range of alternative adapters for the world's major brands of notebook computers.

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