The start-up of Phoenix terminal power supply switching power supply can be divided into three stages. When it is powered on, it charges the capacitor C with a current of approximately 1mA. When the VDD voltage reaches the limit voltage, it enters the next stage. At this time, the saturation current increases to 5mA. It continues to charge the capacitor while supplying power to the IC. When the output voltage is established, it enters the third stage. At this time, the current is zero, and the starting circuit stops working, The VDD voltage rises to the auxiliary winding voltage. In the whole process of starting, the current is relatively small and gentle, so the circuit is safe and reliable. Wide voltage switching power supply products basically adopt the structure similar to the above starting circuit, which can not only ensure the reliability of starting, but also reduce the loss.

菲尼克斯端子电源开关电源的辅助绕组的电压也是影响启动电路稳定的因素，辅助绕组电压偏低，则会使启动电路在开关电源带载时未能完全管断，Q2管在高温高压满载情况下很可能会因过热而烧毁；辅助绕组电压偏高。

The voltage of the auxiliary winding of the switch power supply of Phoenix terminal power supply is also a factor affecting the stability of the starting circuit. If the voltage of the auxiliary winding is low, the starting circuit will not be completely broken when the switch power supply is loaded, and the Q2 tube may be burned due to overheating under the condition of high temperature, high pressure and full load; The auxiliary winding voltage is high.

在某些异常情况下会使得辅助绕组供电的电压接近或超过电源IC的额定电压，对电源IC构成威胁。辅助绕组的电压过高还会对开关电源的整体效率有一定影响，启动电路设计的好坏将会影响整个开关系统的性能指标。

Under some abnormal conditions, the voltage supplied by the auxiliary winding will approach or exceed the rated voltage of the power IC, which poses a threat to the power IC. The high voltage of the auxiliary winding will also affect the overall efficiency of the switching power supply. The design of the starting circuit will affect the performance of the whole switching system.

隔离电源模块，具有宽输入电压范围，封装形式多样，广泛应用于电力、工业自动化、通讯、交通、楼宇自动化、仪器仪表和汽车电子等众多领域。

Isolated power supply module, with wide input voltage range and various packaging forms, is widely used in many fields such as electric power, industrial automation, communication, transportation, building automation, instrumentation and automotive electronics.

以上就是菲尼克斯端子代理厂家为大家介绍的相关内容，希望可以帮助到大家，更多精彩内容可以直接关注：http://www.jnxinxuchuang.com

The above is the relevant content introduced by Phoenix terminal agent manufacturers. I hope it can help you, and more wonderful content can be directly focused on: http://www.jnxinxuchuang.com