We often use LED display power cord plugs in our daily lives. Although the LED display power cord plugs are small, they have a heavy responsibility. They are not only directly related to the use effect and life of household appliances, but also related to the personal and property safety of users. Therefore, consumption The user should choose a suitable LED display power cord plug. Ningbo Haishu Pengxing Electronics Co., Ltd. is a manufacturer specializing in the research and production of LED red and black power cords in Ningbo. Now I will introduce how to choose a suitable LED display power cord plug;

　　 1. Judging by the volume of the radiator of the regulator (except for switching power supplies). Generally, the radiator labeled as 900mA power supply on the market can only work at around 300mA. If the current is too large, it may burn the power cord or thermal protection.

　　 2. Determine whether the DC LED display power cord has a voltage regulator function. The voltage tested by a multimeter with a circuit equipped with a voltage stabilizer is equal to the nominal voltage. The unregulated measured voltage is several volts higher than the nominal voltage.

　　3. Measure the ripple of the DC power supply under rated current operation. Usually the ripple of the traditional series voltage regulator (three-terminal voltage regulator) is 3-5mV, and the switching power supply is 20-30mV. The smaller the ripple, the better.

　　 4. No-load current, when the LED display power cord is not loaded, test the no-load AC current of the 220V input terminal. For power supplies with the same power capacity, the smaller the no-load current, the better. The size of no-load current is related to the power capacity of the LED display power cord. The greater the power, the no-load current also increases.

　　 5. Roughly judge the true capacity of the LED display power cord based on the volume of the transformer. The determination method of transformer rated power P=V (voltage) X I (current) is mainly based on experience.

　　 6. The heating of the power cord of the LED display, after working for a period of time, feel the heating of the DC power supply by hand. The lower the temperature, the better.