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Self-adaptive slope compensation device and method for single-inductor dual-output switch converter

A single-inductance dual-output, switching converter technology, which is applied in the direction of output power conversion device, electric variable adjustment, high-efficiency power electronic conversion, etc. Stability range and other issues to achieve the effect of improving transient response performance

Active Publication Date: 2021-11-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an adaptive slope compensation device and method for a single-inductance dual-output switching converter, which is used to solve the problem that the input voltage or output voltage changes when the single-inductance dual-output switching converter in the prior art adopts fixed slope compensation. , the fixed compensation slope may cause overcompensation and reduce the transient response performance of the converter; and due to the limited stability range of the fixed slope slope compensation, when the input and output voltage change range is too large, the system will exceed the stability range, which will lead to The problem with the converter being in an unstable state

Method used

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  • Self-adaptive slope compensation device and method for single-inductor dual-output switch converter

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Embodiment 1

[0041] combined with figure 1 As shown, an adaptive slope compensation device for a single-inductance dual-output switching converter, including a first voltage detection circuit VS1, a second voltage detection circuit VS2, a third voltage detection circuit VS3, a current detection circuit IS, a timer CLK, a first A drive circuit DR1, a second drive circuit DR2, a third drive circuit DR3, a first ramp signal generator SGC1, a second ramp signal generator SGC2 and a peak current control pulse signal generator PCC, the first voltage detection circuit VS1 Used to detect the voltage of the first output branch of the single-inductance dual-output switching converter, the second voltage detection circuit VS2 is used to detect the second output branch voltage of the single-inductance dual-output switching converter, the current detection circuit IS Used to detect the inductor current of the single-inductance dual-output switching converter, the third voltage detection circuit VS3 is ...

Embodiment 2

[0074] On the basis of Embodiment 1, the single-inductor dual-output switch Boost converter (TD) is replaced by a single-inductor dual-output Buck converter (TC), such as Figure 12 shown.

[0075] The invention can also be used in various multi-output circuit topologies such as a single-inductance double-output Buck-Boost converter and a single-inductance double-output Bioplor converter.

Embodiment 3

[0077] An adaptive slope compensation method for a single-inductance dual-output switching converter realized by using an adaptive slope compensation device for a single-inductance dual-output switching converter, including:

[0078] In each switching cycle, the slope compensation slope is continuously and automatically updated according to the input voltage, the voltage of the first output branch and the voltage of the second output branch of the single-inductance dual-output switching converter to realize adaptive dynamic adjustment, specifically:

[0079] In each working cycle, the third voltage detection circuit VS3 detects the input voltage transformed by the single-inductor dual-output switch to obtain the signal V in , the first voltage detection circuit VS1 detects the first branch voltage transformed by the single-inductor dual-output switch to obtain the signal V oa , the second voltage detection circuit VS2 detects the second branch voltage converted by the single-i...

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Abstract

The invention discloses a self-adaptive slope compensation device and method for a single-inductor dual-output switch converter. The device comprises a first voltage detection circuit VS1, a second voltage detection circuit VS2, a third voltage detection circuit VS3, a current detection circuit IS, a timer CLK, a first drive circuit DR1, a second drive circuit DR2, a third drive circuit DR3, a first ramp signal generator SGC1, a second ramp signal generator SGC2 and a peak current control pulse signal generator PCC. In each switching period, the slope compensation slope is continuously and automatically updated according to the magnitude of the input voltage, the first output branch voltage and the second output branch voltage of the single-inductor dual-output switching converter, and self-adaptive dynamic adjustment is achieved. And the input voltage range is larger, so that the transient response performance of the converter is prevented from being reduced when the compensation slope is over-compensated and the control mode is converted from current type control to voltage type control, and the transient response performance of the converter is improved.

Description

technical field [0001] The invention relates to the technical field of power electronic equipment, in particular to an adaptive slope compensation device and method for a single-inductance dual-output switching converter. Background technique [0002] The large-scale popularization of portable electronic devices promotes the development of multi-output switching power supplies in the direction of low cost, miniaturization, and high conversion efficiency. Compared with traditional multi-output switching converters, single-inductor multi-output switching converters have the characteristics of less magnetic components, small size, and low cost, and have broad application prospects in portable devices. Compared with voltage-type control and peak current-type control, the single-inductor multiple-output switching converter improves the voltage regulation accuracy of the converter output voltage and the response speed to input voltage changes, and because of its own current limiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M1/08
CPCH02M3/158H02M1/08Y02B70/10
Inventor 周述晗贺明智林润泽刘雪山周群
Owner SICHUAN UNIV