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Output voltage reference limit circuit of direct current converter

A technology of outputting voltage and limiting circuits, applied in instruments, regulating electrical variables, control/regulating systems, etc., can solve problems such as low accuracy, out of control, and large range

Pending Publication Date: 2018-01-09
张家港市华为电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the DC power supply system, the output voltage reference is directly assigned by the single-chip microcomputer through voltage division. The single-chip microcomputer controls the output voltage reference from 0V, which has a large range, low precision, and a certain risk of loss of control.

Method used

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  • Output voltage reference limit circuit of direct current converter

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Embodiment Construction

[0006] 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.

[0007] Please see figure 1 , figure 1 A working principle diagram of a DC converter output voltage reference circuit of the present invention is shown.

[0008] In one embodiment, the output voltage reference limiting circuit includes an output voltage reference signal circuit and an output voltage sampling signal circuit,

[0009] T...

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Abstract

The invention provides an output voltage reference limit circuit of a direct current converter. The output voltage reference limit circuit includes an output voltage reference signal circuit and an output voltage sampling signal circuit; according to the output voltage reference signal circuit, a reference signal divides voltage through a first resistor and is coupled with an out-phase input end of an operational amplifier, a sampling reference signal of a PWMU single chip microcomputer divides voltage through a second resistor and is in coupling with the out-phase input end of the operationalamplifier, and the reference signal is in parallel connection with the sampling reference signal of the PWMU single chip microcomputer; according to the output voltage sampling signal circuit, an output voltage sampling signal divides voltage through a third resistor and is in coupling with an in-phase input end of the operational amplifier, and the output voltage reference limit circuit can confine the valid range of the output voltage, increase adjustment precision and reduce out-of-control risk.

Description

technical field [0001] The invention relates to a DC converter output voltage reference circuit. Background technique [0002] In the DC power supply system, the output voltage reference is directly assigned by the single-chip microcomputer through voltage division. The single-chip microcomputer controls the output voltage reference from 0V, which has a large range, low precision, and a certain risk of loss of control. Contents of the invention [0003] According to the above problems, the present invention provides a novel voltage sampling reference circuit. This circuit can limit the output voltage range to the effective output voltage range by adjusting the circuit parameters. The present invention provides a DC converter output voltage reference limiting circuit, the output voltage reference limiting circuit includes an output voltage reference signal circuit and an output voltage sampling signal circuit, wherein the output voltage reference signal circuit includes: a...

Claims

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Application Information

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IPC IPC(8): G05F1/56
Inventor 严为人景晓瑜
Owner 张家港市华为电子有限公司
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