Blog


Different instruments, equipment, and machines often use adapters with different voltages and currents. Therefore, when choosing a power adapter, the following issues need to be noted:

1. To improve the reliability of the system, it is recommended that the power adapter work at 50% -80% load, assuming a power of 20W, a power adapter with an output power of 25W-40W should be selected.

2. Try to use the manufacturer's standard power supply, including standard size and output voltage. This way, the delivery will be faster; On the contrary, special sizes and output voltages will increase development time and costs.

3. Clarify the input voltage range. Taking AC input as an example, commonly used input voltage specifications include 110V and 220V, so there are three corresponding specifications: 110V, 220V AC switching, and universal input voltage (AC: 85V-264V). The input voltage specification should be selected based on the usage region.

4. The power adapter consumes a portion of power during operation and releases it in the form of heat, so users should consider the heat dissipation of the power adapter in system design, especially for enclosed systems.

5. Based on usage, determine the required output voltage and current; The size, installation method, and installation hole position of the power supply; How many outputs are there, and do they need electrical isolation; Input voltage range; Determine the degree of derating and power output of the power adapter based on the ambient temperature; Whether certification and safety standards are required; Cooling method of power supply: natural cooling or forced air cooling; Electromagnetic compatibility standards.


1. Chip IC

The chip does not have a core component in the power supply. It is recommended to choose a top tier brand to ensure a balance between performance, process, and cost. We generally choose to use AC-DC power adapter chips made by Angbao, Silicon Lijie, and Xinpeng Microelectronics

2. Electrolytic capacitors

Electrolytic capacitors are temperature sensitive components in power adapter devices. From this perspective, the quality of electrolytic capacitors also determines the lifespan of power devices to a certain extent. The performance of AC-DC power adapter products is outstanding

3. Primary switching transistor (MOS transistor)

This type of switching device is in a high-speed switching state and experiences high voltage and current stress The heating caused by switch losses can also accelerate the aging of devices and make them susceptible to external high voltage interference and breakdown damage

4. High frequency power transformer

High frequency transformers generate heat due to internal losses during energy transmission, and the emitted heat also affects the lifespan of the transformer material Common transformer faults include insulation breakdown, winding burnout, copper wire breakage, etc

5. Multilayer ceramic capacitors

The area where surface mount ceramic capacitors are prone to problems is at the solder joints, which may crack due to some stress To minimize the possibility of occurrence, it is recommended to avoid parallel use of multiple ceramic capacitors as much as possible

6. Output rectifier diode

Diodes mainly bear two major electrical stresses, including reverse withstand voltage and forward current, and they are also heating devices To ensure the service life of this device, we will provide sufficient margin in the design to ultimately guarantee the batch performance of the power adapter

7. Optocoupler

The current transfer ratio (CTR) will gradually decrease over time. In order to maintain loop stability, the current of the light-emitting diode will continue to increase and eventually reach its limit, causing damage to the optocoupler


In our increasingly digital world, power adapters play a crucial role in keeping our devices charged and available for use. Power adapters, also known as chargers, are essential accessories for laptops, smartphones, tablets, and many other electronic devices that require reliable power. Due to the abundance of various power adapter options in the market, it is crucial to understand the different types available and their respective characteristics. In this article, we will explore the diverse prospects of power adapters and elucidate their main functions.

1. AC/DC power adapter:
One of the commonly used power adapters is the AC/DC power adapter. These adapters convert the alternating current (AC) provided by wall sockets into direct current (DC) suitable for electronic devices. They are equipped with plugs that connect to wall sockets and power cords that connect to devices. AC/DC power adapters are widely used to charge laptops, game consoles, and certain portable electronic devices.

2. USB power adapter:
Due to the widespread use of USB ports in electronic devices, USB power adapters have gained great popularity. They provide a convenient and universal way to charge various devices, including smartphones, tablets, e-readers, Bluetooth speakers, and more. The USB power adapter provides versatility for charging multiple devices simultaneously through multiple USB ports, making it an ideal choice for users with multiple devices.

3. Wall mounted power adapter:
Wall mounted power adapter, as the name suggests, is designed to be directly installed on a wall socket. These adapters are typically used for devices that require continuous power supply, such as routers, modems, and cordless phones. Wall mounted power adapters do not require power cords, creating a neat and orderly setup.

4. Car charger adapter:
The car charger adapter is specifically designed to power electronic devices while in motion. They are usually connected to the cigarette lighter socket of a car, providing reliable power for devices such as smartphones, tablets, GPS systems, and portable gaming devices. Car charger adapters are particularly useful for long-distance travel or widespread use of navigation applications.

5. Wireless charging adapter:
The wireless charging adapter has completely changed the charging method of our devices. They use electromagnetic fields to wirelessly transmit power to compatible devices without any physical connection. Wireless charging adapters are commonly found in smartphones, smartwatches, and certain wireless earphones. They provide a convenient and wireless charging experience.

Conclusion:
Understanding the various types of power adapters available in the market enables consumers to make informed choices based on their specific needs. Whether for daily use, travel purposes, or special needs, power adapters come in various forms to accommodate different electronic devices. From multi-functional USB power adapters to wireless charging technology, manufacturers are constantly innovating to meet the ever-changing needs of our digital lifestyle. Therefore, the next time you find yourself needing a power adapter, please consider your needs and explore the options offered by reputable charger manufacturers.

< 123 > 跳转到