Power supply management circuit and system
A power management and power supply circuit technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of uncontrollable output voltage range, lack of load dump protection function, etc.
Active Publication Date: 2019-06-07
SHANGHAI HUAXING DIGITAL TECH
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Problems solved by technology
[0004] The object of the present invention is to provide a power management circuit and system to solve the problem that the range of the output voltage at the output end of the power supply is uncontrollable and lacks a load dump protection function in view of the above-mentioned deficiencies in the prior art.
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[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.
[0040] figure 1 A schematic diagram of a power management circuit provided for an embodiment of the present invention, such as figure 1 As shown, the power management circuit includes: anti-reverse connection circuit, overvoltage protection circuit, undervoltage protection circuit, switch circuit, detection circuit and control chip circuit.
[0041]Wherein, the input end of the anti-reverse connection circuit is connected to the output end of the power supply, and the output end of the anti-reverse connection circuit is respectively connected to th...
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The invention provides a power supply management circuit and electronic equipment, and relates to the technical field of circuit protection. In the power supply management circuit, the input end of ananti-reversal connection circuit is connected to the output end of a power supply, and the output end of the anti-reversal connection circuit is connected to the first input end of an overvoltage protection circuit, the input end of an undervoltage protection circuit and the first input end of a switch circuit; the output end of the overvoltage protection circuit is connected to the second inputend of the switch circuit; the output end of the switch circuit is connected to a to-be-powered device; the output end of the undervoltage protection circuit is connected to the voltage input end of adetection circuit and the first input end of a control chip; the signal input end of the detection circuit is used for inputting a physical signal; the output end of the detection circuit is connected to the second input end of the control chip; and the output end of the control chip is connected to the third input end of the switch circuit. Thus, the problems, that the output end of the power supply cannot control the measuring range of output voltage and lacks load throwing protection functions, can be solved.
Description
technical field [0001] The present invention relates to the technical field of protection circuits, in particular to a power management circuit and system. Background technique [0002] In today's electronic equipment, especially in electronic equipment with complex functions and a large number of chips, the power management circuit between the power supply and the device to be powered in the electronic equipment is an indispensable circuit. [0003] In the prior art, the power management circuit usually includes an anti-reverse connection circuit, an undervoltage protection circuit and an overvoltage protection circuit. The power output terminal of the electronic equipment is connected to the device to be powered through the power management circuit, and supplies power to the device to be powered. However, in the existing power management circuit, the range of the output voltage at the output terminal of the power management circuit is fixed, which is difficult to adapt to...
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Inventor 沈玮良孙宜阳闫鑫
Owner SHANGHAI HUAXING DIGITAL TECH