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Current sharing circuit and current sharing system based on COT buck converter

A step-down converter and circuit technology, applied in the control/regulation system, output power conversion device, DC power input conversion to DC power output, etc., can solve the problems of different load currents, system malfunctions, and affect the overall efficiency of the system And other issues

Pending Publication Date: 2022-03-11
江阴市新际科技有限公司
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AI Technical Summary

Problems solved by technology

[0005] However, in the parallel application system of multiple power management chips (multiple power stages) in the prior art, the load current on each chip will be different, which affects the overall efficiency of the system
And when the load current exceeds the load capacity of a single chip, the system may not work properly and enter the overload protection mode

Method used

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  • Current sharing circuit and current sharing system based on COT buck converter
  • Current sharing circuit and current sharing system based on COT buck converter
  • Current sharing circuit and current sharing system based on COT buck converter

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Embodiment Construction

[0055] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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 The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0056] ginseng figure 2 As shown, the present invention discloses a current sharing circuit based on a COT step-down converter (COT BUCK), and the current sharing circuit includes:

[0057] A current sampling unit (Current Sense), used to obtain a current sampling signal representing the magnitude of the inductor current in the COT st...

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Abstract

The invention discloses a current sharing circuit and system based on a COT step-down converter, and the circuit comprises a current sampling unit which is used for obtaining a current sampling signal representing the size of an inductive current in the COT step-down converter; and the current equalization control unit is used for converting the current sampling signal into a reference voltage signal which is gradually reduced along with the increase of the inductive current in the COT step-down converter, so that current equalization control is realized. According to the invention, current sharing control during multi-phase parallel use under the COT architecture can be realized.

Description

technical field [0001] The invention belongs to the technical field of COT step-down converters, and in particular relates to a current equalizing circuit and a current equalizing system based on a COT step-down converter. Background technique [0002] ginseng figure 1 Shown is a circuit diagram of a prior art buck converter comprising a IN A pair of power switches M1 and M2 are alternately turned on and off to generate a switched output voltage V at the switch node (SW) SW . Switch output voltage V SW is directly coupled to the output inductor L and output capacitor C OUT LC filter circuit to produce a regulated output voltage V with substantially constant magnitude at the output OUT . Then be able to use the output voltage V OUT to drive the load, whereby the buck converter supplies the load current so that the output voltage V OUT maintained at a constant level. [0003] A buck converter includes a feedback control circuit to regulate energy transfer to the LC fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M1/088
CPCH02M3/158H02M1/088
Inventor 李海波尹虎君刘天杰刘真张磊
Owner 江阴市新际科技有限公司
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