Power supply module feedback control circuit with double functions of constant current and constant voltage

A technology of power supply module and feedback control, which is applied in the direction of control/regulation system, regulation of electrical variables, instruments, etc., and can solve problems such as low circuit efficiency

Active Publication Date: 2019-09-13
XIAN MICROELECTRONICS TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the efficiency of the circuit is low, and a high-power constant voltage power supply Vcc is required to supply power to the constant current load.

Method used

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  • Power supply module feedback control circuit with double functions of constant current and constant voltage
  • Power supply module feedback control circuit with double functions of constant current and constant voltage
  • Power supply module feedback control circuit with double functions of constant current and constant voltage

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Embodiment Construction

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. 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.

[0027] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a power supply module feedback control circuit with double functions of constant current and constant voltage, and belongs to a semiconductor integrated circuit. The power supply module feedback control circuit with double functions of constant current and constant voltage comprises a voltage stabilizer TL431, a first operational amplifier U1, a second operational amplifierU2, a third operational amplifier U3, a fourth operational amplifier U4, a sampling resistor R and a diode D1; a power supply module can work in a constant voltage mode or a constant current mode bysetting a control end; when the power supply module works in the constant current mode, the control circuit is used for controlling current output by the power supply module, the output current is guaranteed to be constant, and the value of the output current is given by an external control signal; and when the power supply module works in the constant voltage mode, the control circuit is used forcontrolling output voltage of the power supply module, the output voltage is guaranteed to be constant, and the power supply module can serve as a DC/DC converter for direct current voltage conversion.

Description

technical field [0001] The invention belongs to semiconductor integrated circuits, in particular to a power supply module feedback control circuit with dual functions of constant current and constant voltage. Background technique [0002] The existing power supply is mainly a constant voltage source. The traditional constant voltage source usually only has the function of voltage stabilization and is widely used in various electronic circuits, but it does not have the function of a constant current source. Most of the existing constant current sources are based on the power supply of the constant voltage source and add an additional current control function, so that the circuit can output a constant current. However, there are problems that the circuit efficiency is low, and a high-power constant-voltage power supply Vcc is required to supply power to a constant-current load. Contents of the invention [0003] The object of the present invention is to overcome the above-m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 孙树峰马华付翀丽崔小川
Owner XIAN MICROELECTRONICS TECH INST
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