Power supply device

Abstract

The invention provides a power supply device. Detection of an AC input power is executed via a control chip in the power supply device without additionally arranging an external independent detection circuit so that design cost can be reduced and extra standby loss cannot be generated. Besides, with a mode that detection of the AC input power is executed by adopting the control chip, detection deviation can be effectively reduced so that a load system can be notified within permitted and accurate time, i.e. preset time. Furthermore, generation of indicating signals can be determined and adjusted by the control chip due to application requirements of the load system so as to notify the length of the preset time of the load system, and thus the power supply device can be generally applied to different types of load systems with timing control requirements.

Description

technical field [0001] The present invention relates to a power conversion technology, and in particular to a power supply device that can be applied to a load system with timing control requirements. Background technique [0002] In some load systems (load systems) with timing control requirements, such as display systems, when the AC input power (AC input power) received by its power supply apparatus (power supply apparatus), such as mains power, When an abnormality occurs (for example: power failure, disappearance), it is mostly necessary to perform detection through an external independent detection circuit (detection circuit) to notify the load system. In this way, once the load system is notified, it will execute a normal shutdown procedure (normal shut-down procedure) to prevent the system from unexpectedly shutting down. [0003] However, the current detection circuit for detecting the AC input power uses many components, so a large hardware layout area and high des...

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Problems solved by technology

[0003] However, the current detection circuit for performing AC input power detection uses more components, so a large hardware layout area and high design cost are required

In addition, the current detection circuit used to detect the AC input power must be connected to the AC input power normally, which will increase the standby loss of the system

Furthermore, the current detection circuit used to detect the AC input power has high detection deviation, so it may not be able to notify the load system within the allowable (accurate) time, and it cannot be universally applied to different types of power supplies. In load systems that require sequential control

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