Electronic Products Power Adapter

Why need to pay attention on power adapter's safety?

Remember the beautiful stewardess who was electrocuted a few years ago because she made a phone call while her cell phone was charging? Who did not think that such a very normal behavior will actually cause a threat to life, then lead to the death of the stewardess electrocuted what exactly is the reason? Today power adapter manufacturers of power supply engineers to solve this mystery.

Lead to people electrocuted and died not because of charging when the phone, but because of the use of cottage poor quality charger. Why are cottage chargers so dangerous? A small power switching power supply which converts 220v AC to 5v DC for cell phone use.

Genuine chargers mostly use a small integrated circuit to provide oscillating signals, amplified by the switching transistor access to the original coil of the high-frequency transformer, there are some chargers using dual transistor self-excited way, while the cottage charger more than the use of a single-tube self-excited drive program, power inefficiencies, and the lack of protection circuits, low safety performance, in the case of an overload or a short-circuit can not automatically cut off the power supply, and make the transformer internal temperature Elevated, burned turn-to-turn insulation, so that the original and secondary coils connected to lead to leakage. Become a cause of electric shock accident.

Circuit board wiring is also an important reason, the regular charger PCB wiring between the lines have enough safety distance, such as the primary circuit and the secondary circuit between the electrical gap can not be less than 4.0mm, creepage distance can not be less than 6.4mm, the distance is not enough should open the empty slot to maintain insulation. The cottage charger primary and secondary only 1-3mm, and even some chargers between primary and secondary difficult to see the border, which also leads to the charger is an important reason for electric shock.

In addition, the regular charger using voltage 3kv special safety capacitors, while the cottage charger using ordinary ceramic capacitors, in the AC voltage surge is prone to breakdown and dangerous. Flight attendant's electrocution accident, there is an important condition is the metal cell phone shell. The metal shell of the cell phone is usually connected to the ground end of the main board of the cell phone, the ground end of the main board of the cell phone when charging the cell phone and through the data line connected to the secondary circuit of the charger, if the charger primary and secondary leakage (or short circuit), the metal shell of the cell phone will be with a high voltage of 220v alternating current, if someone is using the cell phone at this time, the user is very easy to be electrocuted.

So the charger factory can tell you, charging the phone in addition to make the phone hotter, itself is not a danger to people. What causes people to be electrocuted and die is the leakage of electricity from poor quality chargers. So please cherish your life and stay away from cottage chargers that are not certified by safety regulations.

Eahunt's power adapters have been upgraded to level 6 energy efficiency and can be widely used in all kinds of electronic products. In addition, these products have been in line with the United States, the European Union and other countries, the company did UL, CE and other certifications, the majority of consumers can rest assured that customers can buy play their own role can not be ignored, and continue to develop high-quality, high energy-efficiency products to cope with the market's increasingly demanding energy-efficiency requirements.