News

Product selection and application considerations

2019-08-06

The design power of each product of our company will have a certain amount of redundant power, which can run for a long time under full load or even over the rated load. However, for the sake of high reliability and prolonging the service life of the power supply, please do not let the load reach the rated value. It is generally recommended to use 60%-80% of the rated load, and the ambient temperature is recommended to be about 30 ℃, which can be fully loaded at an ambient temperature of 55 ℃, but this will undoubtedly greatly reduce the reliability and service life of the product. In actual use, please pay attention to the two factors of controlling load and temperature. If the ambient temperature is relatively high, it is necessary to reduce the load as much as possible (that is, to increase the load margin and select products with greater output power). On the contrary, if a large load current is required, then try to do a good job of ventilation and heat dissipation, such as placing the power supply module in an open space and increasing cooling fans. The specific value is not absolutely fixed. Generally, it is recommended that the load should not exceed 20% of the rated load when the ambient temperature is 55 ℃, which can keep the product very high reliability. Tip: Please use temperature measuring equipment to evaluate the temperature, and do not rely on skin feeling. Short time and a small proportion of full load, high temperature operation, the reliability and life has little effect. For example: each full load lasts less than 1 minute or half a minute, and the interval is more than 10 minutes, while the load during the interval is less than 15% of the rated load, then even if the operation at 55 ℃ is also possible. Safe Use Warning: Since the bare board series does not have a shell, the input is 220V AC at the same time. The input pins and corresponding terminals of the module are directly connected to 220V. Please pay great attention to prevent short circuit between electric shock and metal objects and ensure that the power supply is disconnected before any touch. Load Requirements for 2. Use of Multiple Output Power Supplies Generally, the voltage accuracy of the output of the multi-output power supply is: the nominal value of the main output is plus or minus 1%, and the nominal value of the secondary output is plus or minus 5%-10%. The first output of the multi-output power supply is the main circuit, and the other output is the secondary circuit. The voltage accuracy and carrying capacity of the main circuit are higher than those of the secondary circuit. Therefore, the main circuit with large current and high voltage accuracy requirements should be generally selected, it is appropriate that the ratio of each current is 50-100%, and the secondary circuit must not be loaded separately under the condition of no load on the main circuit, otherwise the secondary circuit voltage is too low to be used normally. In addition, if the main circuit load is full load and the secondary circuit load is light load, the secondary circuit voltage may increase, otherwise the secondary circuit voltage will decrease, and the reliability and service life will have little effect. For example, if each full load lasts less than 1 minute or half a minute, and the interval is more than 10 minutes, while the load during the interval is less than 15% of the rated load, then even operation at 55°C is possible.

Notice of Guangzhou Sanmin Spring Festival Holiday in 2019

2019-01-23

Another year is coming, and we have ushered in 2019 full of hope, opportunities and challenges! Here, thank you for your support and trust in Sanmin Electronics in the past year. At the same time, I also hope that in the new year, Sanmin Electronics can continue to get everyone's attention and support, and Sanmin Electronics will continue to provide you with better products and services! When China's traditional festival "Spring Festival" is coming, I would like to pay my respects to all new and old customers and friends in the early years! I wish everyone a happy New Year! Financial resources! Business is booming! In order to let the company's employees have a happy and peaceful Spring Festival, the company's 2019 Spring Festival holiday time is hereby notified as follows: Holiday time: January 26-February 11 Commencement time: February 12 (the eighth day of the first month)

Notice of Guangzhou Sanmin National Day Holiday in 2019

2019-09-23

The National Day is approaching. According to the notice of the 2019 Holiday Arrangements announced by the General Office of the State Council and in combination with the actual situation of our company, we hereby notify the 2019 National Day Holiday as follows: 1. Holiday Notice National Day holiday time: 7 days from October 1 to October 7, 2019; Normal work on October 8, 2019. 2. logistics distribution notice According to our National Day holiday schedule, our logistics transportation and distribution details are as follows: Shipment will be stopped from October 1 to October 7. The deadline for orders is 16:30 p. m. on September 30, and normal delivery will resume on October 8 (Tuesday). In order to avoid the unstable time limit of orders caused by excessive logistics pressure during the holidays, please stock up in advance! During the holiday, if you have any questions, please contact the corresponding business manager and customer service personnel. If there is any inconvenience to you, please understand!

Notice of Guangzhou Sanmin Spring Festival Holiday in 2023

2023-01-06

Hello! At the beginning of the Spring Festival, Vientiane is renewed. Thank you for your support and trust in us in the past year. In the new year, all the staff of Guangzhou Sanmin Electronic Technology will work harder to provide you with better products and more considerate services! In order to celebrate the traditional Spring Festival, combined with our specific situation, our company will have the following holidays in 2023: Holiday time: January 14 (December 23) Working time: January 29 (January 8) We sincerely apologize for the inconvenience caused to you. If there is an urgent need, please contact our relevant business personnel. Here to congratulate the happy Spring Festival, business is booming, financial resources!

Guangzhou Sanmin May Day Holiday Notice in 2023

2023-04-28

Thank you for your trust and support for Guangzhou Sanmin Electronics for a long time! With the arrival of Labor Day, all the staff of Guangzhou Sanmin Electronic Technology Co., Ltd. send their sincere wishes to you and your family. I wish you a happy holiday and your hard work.