A power-off sequence control circuit and method for multi-channel power supplies in an indoor distribution system
A technology of timing control circuit and power control circuit, which is applied to electrical components, output power conversion devices, etc., can solve the problems of occupying system resources and poor flexibility, and achieve the effects of simple circuit structure, low cost, and easy implementation process.
Active Publication Date: 2022-04-01
上海中兴易联通讯股份有限公司
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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.
Method used
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[0033] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following examples are for more clearly explaining the technical solutions of the present invention without limiting the scope of the invention.
[0034] In one embodiment, if figure 1 The present invention provides a room division system multi-channel power supply down power timing control circuit, which is powered by an external input power supply. When the external input circuit is powered down, it is necessary to perform the internal power supply of the indoor system according to timing. To prevent damage to each electronic device. This circuit includes:
[0035] The power supply control sampling circuit 101 connects the external input power source for power-down detection and voltage sampling detection; by detecting the voltage signal of the external input power source, the power supply of the external input power supply can be obtained;
[0036] The power supply control circuit is used to trigger each power supply ...
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The invention provides a power-off sequence control circuit and method for multi-channel power supplies in an indoor sub-system, including a power supply control sampling circuit connected to an external input power supply for power-down detection and voltage sampling detection; a power supply control circuit for triggering each circuit The power supply starts to power off the signal; the power switch circuit is used to control the power supply to power off; the power discharge circuit is used to realize the rapid discharge of the power supply. In addition, the method provided by the present invention includes a detection step, a control step and a power-off step. The present invention does not need to use a power management chip, nor does it need to use an MCU control chip. Through the sampling circuit and comparator, it can be realized that when the external input power supply is abnormally powered off, it can quickly and accurately power off the internal power supplies in sequence. Processing, and the circuit structure is simple, the cost is very low, to achieve efficient indoor system multi-channel power control effect, to avoid external abnormal power failure to cause damage to the indoor distribution system, the implementation process is easy, the cost is low, and it is suitable for multiple application scenarios.
Description
Technical field [0001] The present invention relates to the field of power supply control, and more particularly to a room division system multi-channel power supply lower electric timing control circuit and method thereof. Background technique [0002] With the development of electronic products, the corresponding power supply system has become more complicated. Especially in the timing control field of multiple power supplies, each power supply is required to have a strict upper and down power timing. For example, when power-on, the system core components need to be run first. The power peripherals delay the power-on power, and the power peripherals need to be guaranteed to power off first, and the system core components are turned off. Such strict upper and lower power timings can avoid system electric shock, reduce the failure rate, and ensure reliable operation of the entire hardware system. If the timing is improper, it will inevitably affect the normal use of the system, o...
Claims
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IPC IPC(8): H02M1/36
CPCH02M1/36
Inventor 李勇潘亚峰朱龙元
Owner 上海中兴易联通讯股份有限公司