Power adapter basic standard
Aug 27, 2018| There are two major points in the eligibility criteria for power adapters:
The first point: the quality of the power supply
In the current market sales, the formal power adapter must be in the national mandatory 3C certification system before it can be enjoyed. The more the power adapter is certified, the more reliable the quality of the power supply. There are now four versions of the 3C certificate:
1. CCC(S) safety certification
2.CCC (SE) Security and EMC Certification
3.CCC (EMC) electromagnetic compatibility certification
4. CCC (F) fire certification.
Nowadays, the power adapter on the market is certified by CCC (S&E). Its requirements are two standards of safety and electromagnetic compatibility. When you see the CCC (S&E) mark on the power supply, it means that it has passed 3C certification and 3C certification. It is the basic standard for power adapters. In addition to 3C certification, the more naive power supply will also have the UL certification mark. UL is one of the most authoritative certifications in the world, and has very strict standards for structures, materials and test instruments. There are also FCC standards for power supplies. This indicates that they can be exposed to electromagnetic interference, which can eliminate the harm of the power supply to the human body.
Second point: circuits that increase safety and stability
1. Lightning protection circuit: When generating high pulse voltage, the function of the power supply lightning protection device is to release the user equipment on the circuit due to the induced lightning strike to the safety line in the shortest time. This is the core function of the lightning arrester.
2. EMI filter circuit: EMI filter circuit is the interference of the filter network, which reduces the electromagnetic interference of the switching power supply itself to the outside world. EMI is also an important content of CCC certification.
3. PFC circuit: “power factor correction”, adding PFC circuit can effectively reduce the hazard performance of line power due to factor reduction.