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Current detection circuit and switch-type regulator provided with same

A current detection circuit and switch-type technology, which is applied in the direction of measuring current/voltage, only measuring current, and adjusting electric variables, etc., can solve the problems of large circuit size, unfavorable circuit integration, and high implementation cost, so as to simplify the circuit structure and realize a single On-chip integration, the effect of reducing the chip area

Active Publication Date: 2013-07-10
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a new type of current detection circuit used in switching regulators, to solve the problem of the current detection circuit in the prior art with large circuit volume, high cost and unfavorable circuit integration. And other issues

Method used

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  • Current detection circuit and switch-type regulator provided with same
  • Current detection circuit and switch-type regulator provided with same
  • Current detection circuit and switch-type regulator provided with same

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Embodiment Construction

[0045] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0046] refer to Figure 2A , shows a functional block diagram of a current detection circuit applied to a switching regulator according to the first embodiment of the present invention. In this embodiment, the switching regulator 200 includes a power stage circuit and a current detection circuit. Here, the power stage circuit of the swit...

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Abstract

The invention relates to a current detection circuit and a switch-type regulator provided with the same. The current detection circuit comprises a feedback signal generation circuit and a feedback control circuit, wherein according to a received output signal of the feedback control circuit, rising time of the inductive current and declining time of the inductive current in the switch-type regulator, the feedback signal generation circuit generates a feedback signal which is in a direct proportion relation with the output signal. The feedback control circuit receives the feedback signal and a reference signal and controls the feedback signal and the reference signal to be kept consistent so as to ensure that the output signal of the feedback control circuit can represent current information to be detected.

Description

technical field [0001] The invention relates to the field of switching power supplies, more specifically, to a current detection circuit applied in a switching regulator and a switching regulator using the same. Background technique [0002] A switching regulator is used to provide a stable voltage source or current source for various electrical systems. The switching regulator converts the input DC voltage into a high-frequency voltage, filters the high-frequency output voltage and then converts it into a DC output voltage or output current. Specifically, a switching regulator usually includes a switching device, an output filter, and a controller. The switching device is alternately connected and disconnected from an input DC voltage source (such as a battery) to provide power to the load. An output filter composed of an inductor and a capacitor is connected between the input voltage source and the load, and is used for filtering the output signal of the switching device ...

Claims

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Application Information

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IPC IPC(8): G01R19/00H02M3/156
CPCG01R19/0092H02M3/156H02M1/0009H02M3/155
Inventor 赵晨
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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