Power adapter manufacturers to share: the basic knowledge of safety _

What is the difference between LED the RU and UL logo?

1059, 2020 -
05 -

13 09:30:48 for UL certification of different service types we often see different UL certification marks, usually UL marks can be divided into three categories: are UL Listed Listed, UL certification and accreditation Recognized and UL hierarchical Classification three different types of UL marks.

Common problems and solutions in the design of the LED power supply of 2020-986
07 -

01 16:29:37 in current life, in order to save energy, LED by large, but LED all need to have a power drive, it is good or bad will directly affect the service life of the LED, so how to make an LED driving power supply is the key of the LED power supply designer.

LED power supply overvoltage protection circuit is normally what effect is there?

1225, 2020 -
05 -

12 16:55:35 in LED power supply protection circuit design process, the setting of over-voltage protection circuit is essential, can effectively guarantee the normal operation of the whole power system.

LED waterproof power supply protection grade, introduced in 2020-1151
05 -

12 16:55:16 LED waterproof power supply protection grade introduce LED waterproof power supply protection grade abbreviations for IP (

国际保护)
It is thus by IEC (

国际电气技术委员会)

The draft, will prevent outside content invasion, waterproof, dustproof, moisture proof features and classification of a proper noun.

How do you use the USB charger, car charger, 2020-1023
05 -

21 10:53:49 along with the development of the automotive interconnect technology in recent years, mobile phone contact with car is more and more closely, it is also directly contributing to cell phone power consumption faster, so the car charger was born, and quickly spread to most of the owners.

In addition to the characteristics of PWM control itself, like working in a quasi resonant mode, light frequency, dynamic self-supply, low no-load power consumption characteristics, are similar to conventional flyback type circuit.

What is the LED driver power supply?
What is the feature of it?

2533, 2020 -
06 -

04 16:38:12 LED drive power is the power supply is converted into a certain voltage current to drive the LED power converter, normally: LED drive power supply input including high-voltage ac power frequency (
The mains)

Dc, high-voltage direct current, low voltage, low voltage high frequency ac (
Such as electronic transformer output)
And so on.

Why what is aging test, the power adapter do aging test?

1122, 2020 -
06 -

04 16:46:05 aging test, for consumer customers may be very unfamiliar words, then the power adapter manufacturer to simple to explain what is aging test, and why the power adapter do aging test?

Aging test is simple to show the power adapter is in a period of time full use work, to see what's the problem with the power adapter will produce.

Do you really understand what is a switching power supply?

1061, 2020 -
06 -

05 14:23:56 widely use of switching power supply, it is a important part of the electronic design, small, light weight, high efficiency is the key of the future development, how to do have to know what kind of switch power supply have characteristics.

What will you pay attention to when using the car charger, 2020-182
11 -

27 16:53:27, with the development of intelligent car is becoming more and more close contact phone, some cars even can support the direct manipulation of mobile phone.