Design And Realization Of Safe Power Supply System For Anti-Buried Current

Electronic information age,consumer electronics,Internet of things intelligent home,network communications platform and other electronic equipment on people's daily life is growing.And the core of these electronic devices is the power supply which provides a certain amount of power for all system circuits.With the birth of switching power supply,the power supply take a change from the traditional high power consumption,large volume to today's light,low power consumption,high efficiency.Furthermore,power efficiency and safe stability of the two characteristics of the power supply has been the concern of the majority of developers.The most common power operation in a communication system is the hot swap of the power supply.Hot plug caused by the impact of the current effect of the power supply will have a great impact on the safety and stability,so the hot swap has been the main concern of the industry.for this reason,The globally semiconductor companies,represented by Maxim,Texas Instruments and ADN,are proposing their own solutions and corresponding controller chips for hot-swappable problems.Furthermore,consider the circuit cost and the actual system circuit power interface situation,There are some applications in both the long-short needle method suppresses the inrush current circuit and discrete device active impulse current suppression circuit.The paper explore the problem that the hot-swap in the communication circuit system occasionally causes the slow start circuit to fail based on the analysis of hot-plug and impact current problem.In the fast hot swap,The system circuit after the storage capacitor will reverse the current to the front of the low-impedance circuit,thus affect the switch tube gate charge and discharge capacitor discharge in time.At this point,the rapid hot-swappable board will inevitably lead to not shut down the switch and the system can not enter the slow start state.According to the power supply is slow to start module failure due to the rapid hot swap operation of the circuit board,this paper presents a threshold voltage control circuit employed in conjunction with a finite impulse current suppression circuit embodiment of the circuit.The system circuit design mainly includes the input power supply charge and discharge module,the power voltage slope control module,the threshold voltage control module and other auxiliary design circuit module.After a theoretical analysis of each circuit module,the paper choose the power supply professional simulation software Saber to simulate and verify analysis the system circuit.Different from the general circuit simulation software,Saber is a world's most advanced integrated system simulation software.The results of the simulation show that the design is feasible and its working state in the hot swap is basically the same as the theoretical analysis.Before the actual circuit test analysis,This paper describe the specification of discrete components in detail and purchase the circuit components combined with the design requirements of the system circuit.The actual test shows that joining the threshold control circuit Into the discrete device active impulse current limit circuit can be very good to achieve the isolation of the anti-current from the energy storage components,Thus solving the problem of slow start circuit failure caused by rapid hot-swappable board.Overall,the system circuit is actually tested well and the circuit design is simple and low cost.There is a very good application value in the large-scale circuit system involves the rapid hot-swappable.