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.

菲尼克斯端子電源開關電源的輔助繞組的電壓也是影響啟動電路穩定的因素，輔助繞組電壓偏低，則會使啟動電路在開關電源帶載時未能完全管斷，Q2管在高溫高壓滿載情況下很可能會因過熱而燒毀；輔助繞組電壓偏高。

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.

在某些異常情況下會使得輔助繞組供電的電壓接近或超過電源IC的額定電壓，對電源IC構成威脅。輔助繞組的電壓過高還會對開關電源的整體效率有一定影響，啟動電路設計的好壞將會影響整個開關系統的性能指標。

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.

隔離電源模塊，具有寬輸入電壓范圍，封裝形式多樣，廣泛應用于電力、工業自動化、通訊、交通、樓宇自動化、儀器儀表和汽車電子等眾多領域。

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廠家為大家介紹的相關內容，希望可以幫助到大家，更多精彩內容可以直接關注：http://www.xzthjc.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.xzthjc.com