Fast Charging


Shanghai Yongming Electronics Co., Ltd.
has launched a series of capacitor products, which are specially designed for fast charger

High Voltage Liquid Aluminum Electrolytic Capacitor


Solid Radial Lead Type Electrolytic Capacitor


Solid SMD Type Electrolytic Capacitor


MLCC (Multilayer Ceramic Electrolytic Capacitors)


Multilayer Polymer Solid Electrolytic Capacitors


Super Capacitor (EDLC, Electric Double Layer Capacitor )


Solid-Liquid Hybrid Radial Lead Type Electrolytic Capacitor


Conductive polymer tantalum electrolytic capacitor


What’s is PD Charger ?

PD charger, PD means Power Delievery, The full name is USB Power Delivery, which is a fast charging standard introduced by the USB standardization organization, and it has reached version 3.0. A device that charges other electrical appliances. The equipment adopts high-frequency power supply technology, uses intelligent dynamic adjustment charging technology, and uses power electronic semiconductor devices to convert alternating current with constant voltage and frequency into direct current. It is generally composed of flexible circuit boards, electronic components, etc., and its designed circuit The working frequency can be divided into industrial frequency machine and high frequency machine, which are widely used in various fields, especially in the field of life, and are widely used in common electrical appliances such as mobile phones and cameras. Since mobile phones are charged through the USB interface, the USB standardization stipulates that the voltage and current must be adjusted through the USB and PD protocols. Through such a unified protocol, all mobile phone users can better enjoy the fast charging technology, which is convenient for everyone to use. Chargers are classified according to the working frequency of the designed circuit, and can be divided into power frequency machines and high frequency machines. The industrial frequency machine is designed based on the traditional analog circuit principle. The internal power components of the machine (such as transformers, inductors, capacitors, etc.) In the environment conditions of the power grid, the resistance performance is stronger, and the reliability and stability are stronger than that of the high-frequency machine. The output parameters marked on the original charger (referring to the line charger): for example, output 4.4V/1A, output 5.9V/400mA... refer to the relevant parameters of the internal regulated power supply.

What is GaN Technology? , why do you need a GaN charger?

GaN or gallium nitride chargers are about three times more efficient at converting electricity to electricity than silicon-based chargers, and they're smaller and more portable, allowing them to charge phones ten times faster than regular chargers. times, which means you can take them anywhere and still get more power.

GaN is resistant to high temperatures, allowing the charger to last longer while reducing the heat dissipated by the device. GaN technology will increase the possibility of producing more powerful devices using less energy in the future, and they are rapidly gaining popularity as the perfect semiconductor in chargers.

The main reason why a GaN charger is superior to a silicon-based charger is that it uses less energy by more efficiently converting electricity to AC. It won't be long before you see GaN chargers in smartphones and other electronics. The Galaxy S4 smartphone released by Samsung Electronics earlier this year began using GaN chargers.

Silicon has been the material of choice for transistors since the 1980s. Silicon absorbs energy better than traditionally used materials such as vacuum tubes, while still keeping costs down due to its low production costs. Technological advancements over the years have produced and rapidly changed the future of chargers. GaN is a unique material. It is a crystalline substance that can conduct higher voltages. GaN components allow current to flow through them faster.


Converts from AC to DC better than silicon chargers, allowing you to charge your mobile device faster and more efficiently. With GaN chargers, your devices will use less energy and have better heat resistance, extending their lifespan.

When using GaN instead of silicon, everything can be brought closer. More computing power can be crammed into a narrower room, giving you a powerful portable compact charger that you can easily take anywhere without compromising power.


Production costs are higher than silicon-based chargers because not many mainstream consumer tech products are starting to produce them. As a result, there are not as many charger makers using GaN technology as they should, although this will hopefully improve when production and costs become more affordable. Still, some businesses are now reaping the benefits of this incredible technology.

Development history of PD fast charging industry

With the requirements of the market, PD fast charging is developing in the direction of high density, high power and small size.

GaN PD fast charging achieves high power output through high voltage and high current, so as to realize fast charging. Its output voltage can reach up to 12V, and its output current can reach 5A; therefore, the output filter capacitor will choose 25V voltage, large capacity , low ESR solid capacitors. A large enough capacity can ensure DC support, and a sufficiently low ESR can ensure the filtering effect. However, conventional 25V solid aluminum electrolytic capacitors have such a problem: the ability to withstand switching shocks is insufficient.

Generally speaking, two liquid aluminum electrolytic capacitors are used as high-voltage filter capacitors at the high-voltage input terminal of the PD's fast charge. The low-voltage output generally uses two solid aluminum electrolytic capacitors as filter solid-state impact-resistant capacitors.

With the rise of the third-generation power semiconductor GaN in power chip applications, YMIN is invited by internationally renowned power chip brands to develop miniaturized aluminum electrolytic capacitor products for PD fast charging in early 2018. Liquid aluminum electrolytic capacitors are applied to the input high-voltage side of PD fast charging; solid aluminum electrolytic capacitors are applied to the output low-voltage side of PD fast charging to meet the urgent needs of high power density and miniaturization of PD fast charging products. The matching large-capacity, small-volume, high-reliability products have been highly recognized and favored by the market after their launch.