Impulse current suppression circuit
A technology for suppressing circuits and inrush currents, applied in the field of circuits, can solve problems such as power supply voltage drops and affect normal operation of products, and achieve the effects of reducing power consumption, suppressing inrush currents, and reducing inrush currents
Pending Publication Date: 2022-01-14
深圳英恒电子有限公司
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Problems solved by technology
[0002] At present, the low-voltage power of electrical equipment such as vehicle products is usually supplied by external power sources such as batteries. When the power supply is powered on, an inrush current will inevitably be generated at the moment of product startup; due to reasons such as the internal resistance of the power supply, a large inrush current will lead to The voltage drop affects the normal operation of the product
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[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0030] An embodiment of the present invention provides an inrush current suppression circuit. figure 1 It is a structural schematic diagram of an inrush current suppression circuit provided by an embodiment of the present invention. see figure 1 , The inrush current suppression circuit includes: a switch module 310 , a current limiting module 320 and a switch control module 330 .
[0031] The switch module 310 includes a control terminal 33, a first terminal 31 and a second terminal 32; the first terminal 31 of ...
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The invention discloses an impulse current suppression circuit. The impulse current suppression circuit comprises a switch module, a current limiting module and a switch control module. The switch module switches on or switches off in response to a signal of a control end; the input end of the current limiting module is electrically connected with the first end of a power supply, and the output end of the current limiting module is electrically connected with the second end of the switch module; the first input end of the switch control module is connected with a delay power supply signal, the second input end of the switch control module is electrically connected with the output end of the current limiting module, the third input end of the switch control module is electrically connected with the second end of the power supply, and the output end of the switch control module is electrically connected with the control end of the switch module; the equivalent impedance of the switch module when the switch module is switched on is smaller than the equivalent impedance of the current limiting module; and within a preset time after the power supply is powered on, the delay power supply signal does not reach a preset voltage, and the switch control module responds to the delay power supply signal to control the switch module to be switched off, so that the power supply supplies power to a post-stage circuit through the current limiting module. According to the impulse current suppression circuit of the invention, the impact current generated when the power supply is powered on can be effectively suppressed.
Description
technical field [0001] The embodiments of the present invention relate to the field of circuit technology, and in particular to an inrush current suppression circuit. Background technique [0002] At present, the low-voltage power of electrical equipment such as vehicle products is usually supplied by external power sources such as batteries. When the power supply is powered on, an inrush current will inevitably be generated at the moment of product startup; due to reasons such as the internal resistance of the power supply, a large inrush current will lead to The voltage drop affects the normal operation of the product. Therefore, how to effectively suppress the inrush current when the product is started is an urgent problem to be solved by technicians in the industry. Contents of the invention [0003] An embodiment of the present invention provides an inrush current suppression circuit to effectively suppress inrush current generated when a power supply is powered on. ...
Claims
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Login to View More IPC IPC(8): H02H9/02H02H9/00
CPCH02H9/02H02H9/005
Inventor 刘少彬植万湖何伟峰陈朝飞
Owner 深圳英恒电子有限公司