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Step-down conversion circuit controller over-current detection circuit

A technology for overcurrent detection and conversion circuits, which is applied to instruments, measuring devices, and measurement of electrical variables, etc., and can solve the problem of low accuracy of overcurrent detection circuits

Pending Publication Date: 2021-04-30
意美旭智芯能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of low precision of the overcurrent detection circuit of the step-down conversion circuit controller in the prior art, and provide a step-down conversion circuit controller with high precision of the overcurrent detection circuit of the step-down conversion circuit controller Overcurrent detection circuit

Method used

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  • Step-down conversion circuit controller over-current detection circuit
  • Step-down conversion circuit controller over-current detection circuit

Examples

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Embodiment

[0026] Embodiment: a step-down conversion circuit controller overcurrent detection circuit, such as figure 1 As shown, it includes a first control switch, a second control switch, a filter circuit and a comparator, the first end of the first control switch is grounded, the second end of the first control switch is connected to the input end of the filter circuit and the first end of the second control switch, The second terminal of the second control switch is connected to the first terminal of the comparator, the second terminal of the comparator is grounded, the third terminal of the comparator is used as the signal output terminal, the control terminal of the first control switch is used to receive the control signal, and the control terminal of the second control switch is connected to The controllable power supply terminal is VDD, and the output terminal of the filter circuit is grounded. The second terminal of the second control switch of the second controller is also co...

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Abstract

The invention discloses a step-down conversion circuit controller over-current detection circuit, which comprises a first control switch, a second control switch, a filter circuit and a comparator, wherein the first end of the first control switch is grounded, and the second end of the first control switch is connected with the input end of the filter circuit and the first end of the second control switch; the second end of the second control switch is connected with the first end of the comparator, the second end of the comparator is grounded, the third end of the comparator serves as a signal output end, the first control switch control end is used for receiving control signals, the second control switch control end is connected with the controllable power supply end VDD, and the filter circuit output end is grounded. The invention provides the step-down conversion circuit controller over-current detection circuit, which is high in precision.

Description

technical field [0001] The invention relates to the technical field of circuit overcurrent protection, in particular to an overcurrent detection circuit for a step-down conversion circuit controller. Background technique [0002] In recent years, with the rapid development of analog semiconductors, Buck controllers are more widely used in fields such as computers, electronics or electrical instruments. In the Buck controller, there are more and more high-load current applications. In order to ensure the short-term overload capability of the power tube, an over-current protection circuit is usually designed in the system. [0003] Chinese Patent Publication No. CN103412180B, published on August 12, 2015, the name of the invention is an overcurrent detection circuit, the application includes a current sense resistor (RSENSE) for sampling the operating current of the system under test The voltage comparator (U2) of current threshold value, it is characterized in that: describe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
CPCG01R19/16533Y02B70/10
Inventor 龚裕袁震
Owner 意美旭智芯能源科技有限公司
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