Second, technology trends 1) for the development of a series of features LED constant current control electronics, the use of integrated circuit technology will each LED input current control in the best current value, making the LED current can get a stable common mode inductance , and produce the highest output light flux. LED drive circuit in the case where the input voltage and ambient temperature and other factors are changed to control the magnitude of the LED is preferably current. 2) LED driver circuit with intelligent control functions, the LED load current can be under the influence of various factors can be controlled at the level of pre-designed. When the load current is generated due to various factors change, the primary control IC can control the switch so that the load current value back to the initial design. 3) In the control circuit circuit design, would like to centralized control, standard modular common mode inductance supply, system scalability in three areas of development. 4) In the current LED luminous efficiency and luminous flux limited circumstances, give full play to the characteristics of LED color diversity, develop color LED lighting control circuit. Characteristic parameters of a power transformer operating frequency transformer core loss versus frequency common mode inductance great price, it should be based on frequency of use to design and use, this frequency is called frequency. 2 rated power at the specified frequency and voltage transformer can work long-term, not exceeding the prescribed temperature output power. 3 refers to the rated voltage to the coil of the transformer allows the applied voltage, not greater than a predetermined value during operation. 4 voltage ratio refers to the ratio of the transformer primary and secondary voltages, there are differences between the no-load voltage ratio and load voltage ratio. 5-load current transformer secondary open primary is still a certain current, this part of the current is called the no-load current. No-load current from the magnetizing current and the current composition of the iron loss. For 50Hz power transformer, the load current is substantially equal to the magnetizing current. Common mode inductance supplier, Jiangsu common mode inductance, NJWTT Wal Teng Technology provided by Nanjing Wolfowitz Proton Technology Electronic Equipment Factory. Nanjing Wolfowitz Proton Technology Electronic Equipment Factory (www.njwtt.com) strong, credible, in other industries Nanjing accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead NJWTT Wolfowitz Proton technology and you hand into the brilliant, for a better future!