Industry Information

Update July 20, 2022

External power supplies (EPS), also known as AC DC adapter, are the small black boxes on the cord of many small or portable electronic devices such as laptop computers, LED/LCD, computer speakers,...

Update July 18, 2022

Why does my Laptop AC adapter not work?

If you're experiencing a problem where your laptop's AC adapter is not working or is not working correctly, there are several things you can check before looking to buy a new adapter. Verify adapter...

Update July 15, 2022

Is it normal for a laptop power adapter to be hot?

When a laptop is plugged in and turned on, the ac dc adapter may be warm to the touch. A relatively warm power adaptor is normal, especially when the laptop is in use while the battery is charging....

Update July 11, 2022

What is an AC adapter?

Alternatively known as an AC/DC adapter, AC DC converter or charger, an AC adapter is an external power supply used with devices that run on batteries or have no other power source. AC adapters help...

Update July 08, 2022

Is the humidifier power supply resistor connected in parallel with the power supply?

The first resistor includes a plurality of resistors connected in parallel. The thermistor is needed in the humidifier, and two series of thermistors are mainly used. The PTC thermistor is mainly...

Update July 08, 2022

What should I do if the power supply of the humidifier does not respond?

When the led supply switch of the humidifier fails, it is difficult for us to repair it ourselves. If the power supplies is not plugged in tightly, it is fine, just plug it in properly. If the power...

Update June 27, 2022

Efficiency Regulations Outside the US and EU for External Power Supply

It is widely recognized that the losses caused by inefficiencies in external power supplies (EPS), such as ac dc adapter and battery charger, are a major contributor to energy use globally, with a...

Update June 23, 2022

Questions about EMC, and EMC testing

Electromagnetic compatibility (EMC) is a discipline that studies how various electrical devices (generally including organisms) can coexist without degrading under limited conditions of space, time,...

Update June 22, 2022

What Is NEMA 3R and the difference with IP?

The National Electrical Manufacturers Association (NEMA) sets the standards for enclosures sold in the United States using a 1 through 13 system. As shown in the charts below, each number classifies...

Update June 16, 2022

Is IP20 OK for outside?

IP20 products are most commonly used for indoor purposes, within areas such as your living room or kitchen. This is mainly because they are generally unable to withstand exposure to external climate...