Epson programmable crystal oscillator SG-8018 series is suitable for intelligent photovoltaic junction box PLC communication

With the increasing pursuit of a clean environment and strong support from new energy policies in various countries, photovoltaic power generation is rapidly developing globally. Among them, the demand for intelligent photovoltaic junction boxes, as an important component, is enormous. As shown in Figure 1, in the intelligent photovoltaic junction box, most manufacturers will choose PLC communication with low cost and high reliability, and according to the communication speed requirements of PLC, a 9.9MHz crystal oscillator is needed.

        Figure 1 Internal structure diagram of intelligent photovoltaic junction box

According to the characteristics of photovoltaic industry products and intelligent photovoltaic junction boxes, the crystal oscillator required for PLC communication should have the following features:

According to the communication requirements of PLC, the frequency of the crystal oscillator should be the uncommon 9.9MHz;

PLC communication is asynchronous communication, requiring high frequency accuracy and stability; The working temperature environment should meet -40 ℃~85 ℃ or above;

The smart photovoltaic junction box has a small volume and requires a small crystal oscillator volume;

Considering production safety, the supply of this crystal oscillator should be stable and fast;

EPSON is a world-renowned supplier of clock products, with advantages in the entire industry chain of wafer production, crystal processing, packaging, and testing. Its products cover a wide range, and based on the unique QMEMS production process, its SG-8018 series output frequency programmable clock chips can fully meet the 9.9MHz requirements of intelligent photovoltaic junction boxes.

The SG-8018 series has programmable output frequency, which can achieve specified frequency output from 0.670000MHz to 170000000MHz, including 9.9MHz frequency output required for communication with intelligent circuit breakers PLC;

The SG-8018 series has a frequency error of ± 50ppm, fully meeting the asynchronous communication requirements of intelligent circuit breakers PLC; And the working temperature environment is wide to -40 ℃~105 ℃;

The SG-8018 series products adopt advanced QMEMS technology and are packaged in a 2520 package with a volume of only 2.5mm * 2.0mm, which is small and helps to achieve miniaturization of intelligent junction boxes;

The SG-8018 series is a clock product that produces first and then programs the output frequency. It is convenient for manufacturers to produce in large quantities and keep inventory. Therefore, whether it is samples or bulk shipments, the delivery time is very short, which can bring the benefits of stable supply and fast speed to users;

The SG-8018 series is a programmable product with large production capacity, therefore, it has the advantage of low cost, which also meets the price requirements of photovoltaic products.

Overall, EPSON's SG-8018, which adopts QMEMS technology, is a clock chip with programmable output frequency. It has the advantages of arbitrary programming of output frequency, high frequency accuracy, good stability, small size, low price, and fast shipping speed. It is very suitable for application in products that require special frequencies, including smart junction boxes.