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Control apparatus of voltage converter

A technology of voltage converters and control devices, which is applied in the direction of control/regulation systems, instruments, and conversion equipment without intermediate conversion to AC, and can solve problems such as high cost and complicated circuit design

Inactive Publication Date: 2003-11-12
UNIVERSAL SCIENTIFIC INDUSTRIAL (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] Generally, a control device is provided in a voltage converter to adjust the output voltage of the voltage converter, and the control device used is usually a pulse width modulation controller, but the pulse width modulation controller has quite a lot of components , which mainly includes an error amplifier, a triangle wave generator, a Schmitt comparator, a control gate and a level converter / FET driver, resulting in a more complex circuit design and a disadvantage of higher cost

Method used

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  • Control apparatus of voltage converter
  • Control apparatus of voltage converter
  • Control apparatus of voltage converter

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Embodiment Construction

[0008] The control device of the present invention is used in a voltage converter to control the output voltage of the voltage converter, and the DC / DC voltage converter or the voltage converter of the switching power supply are applicable, the two types of voltage converters such as figure 1 As shown, there is a power stage 1, and the power stage 1 includes a power switch 11, a diode 12 electrically connected to the power switch 11, and an inductor-capacitor electrically connected to the power switch 11 and the diode 12 The filter circuit 13 and an output terminal 14 electrically connected to the LC filter circuit 13 .

[0009] The control device 3 of the present invention is electrically connected between the power switch 11 and the output terminal 14 of the power stage 1, and the control device 3 includes a comparator 31 electrically connected to the power switch 11, a comparator 31 The trigger circuit 32 is electrically connected, and two voltage dividing resistors R2 and...

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Abstract

A control device connected between power switch and output end of a voltage convertor comprises a comparator and a trigger circuit. The comparator comprises a positive input end connected in electricity to a reference voltage, a negative input end in electricity with output end of the voltage convertor and an output end connected in electricity with the power switch and a voltage source; and the trigger circuit comprises a resistance connected in electricity between the reference voltage and positive input end of the comparator and a feedback resistance as well as a feedback capacity connected in series between the positive input end and the output end.

Description

(1) Technical field [0001] The present invention relates to a control device, in particular to a control device of a voltage converter capable of outputting a control pulse with a bistable state, accurately controlling the synchronous switching action of the power switch, and achieving voltage stabilization effect at the same time. (2) Background technology [0002] Generally, a control device is provided in a voltage converter to adjust the output voltage of the voltage converter, and the control device used is usually a pulse width modulation controller, but the pulse width modulation controller has quite a lot of components , mainly includes an error amplifier, a triangular wave generator, a Schmitt comparator, a control gate and a level converter / FET driver, resulting in a relatively complex circuit design and a disadvantage of high cost. (3) Contents of the invention [0003] The object of the present invention is to provide a control device for a voltage converter ca...

Claims

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Application Information

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IPC IPC(8): G05F1/56H02M3/10
Inventor 洪锦宽
Owner UNIVERSAL SCIENTIFIC INDUSTRIAL (SHANGHAI) CO LTD
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