Indoor distribution system multipath power supply power-off time sequence control circuit and method thereof

Abstract

The invention provides an indoor distribution system multipath power supply power-off time sequence control circuit and a method thereof, and the circuit comprises a power supply control sampling circuit which is connected with an external input power supply and is used for power-off detection and voltage sampling detection; a power supply control circuit which is used for triggering each path ofpower supply to start powering off; a power switch circuit which is used for controlling power-off of the power supply; and a power supply discharging circuit which is used for realizing power-off rapid discharging of the power supply. In addition, the method provided by the invention comprises a detection step, a control step and a power-off step. According to the invention, a power supply management chip and an MCU control chip are not needed, the internal power supplies can be quickly and accurately powered off according to a time sequence through the sampling circuit and the comparator when the external input power supply is abnormally powered off, the circuit structure is simple, the cost is very low, an efficient indoor system multipath power supply control effect is realized, damageto the indoor distribution system caused by external abnormal power failure is avoided, the realization process is easy, the cost is low, and the method is suitable for multiple application scenes.

Description

technical field [0001] The invention relates to the field of power supply control, in particular to a power-off sequence control circuit and method for multiple power supplies of an indoor distribution system. Background technique [0002] With the rapid development of electronic products, the corresponding power supply system has become more and more complex. Especially in the field of sequential control of multiple power supplies, each power supply is required to have a strict power-on and power-on sequence. For example, when powering on, the core components of the system need to run first, and the power peripherals delay power-on. When powering off, it is necessary to ensure that the power peripherals are powered off first, and then the core components of the system are powered off. Such strict power-on and power-off sequence requirements can avoid system electrical shocks, reduce failure rates, and ensure reliable operation of the entire hardware system. If the timing ...

AI Technical Summary

Problems solved by technology

For this kind of power-down sequence circuit controlled by MCU, there are problems of poor flexibility and occupation of system resources.

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