Two-path symmetrical-output adjustable power source

A technology of symmetrical output and power supply, applied in the field of electronics, can solve the problem of large power consumption of the regulating tube, and achieve the effect of low power consumption, high performance and expanding the output voltage range.

Active Publication Date: 2016-04-06
NEUSOFT MEDICAL SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this method is used for low-voltage output, there is a problem of excessive power consumption of the adjustment tube.

Method used

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  • Two-path symmetrical-output adjustable power source
  • Two-path symmetrical-output adjustable power source
  • Two-path symmetrical-output adjustable power source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] see figure 1 , which is a schematic diagram of Embodiment 1 of the dual-channel symmetrical output adjustable power supply provided by the present invention.

[0058] A dual-channel symmetrical output adjustable power supply provided in this embodiment includes: a switching power supply module 100, a positive adjustment module 200, a negative adjustment module 300, and a first operational amplifier A1;

[0059] The first input terminal of the switching power supply module 100 is connected to a DC power supply Vin, and the switching power supply module is used to output positive voltage +V and negative voltage -V according to the error between the reference voltage Vref and the output voltage of the first operational amplifier A1. ; The positive voltage +V and the negative voltage -V share a common ground and are equal in absolute value;

[0060] It should be noted that the reference voltage Vref may be 1.25V, 2.5V or 5V.

[0061] The value of the positive voltage +V s...

Embodiment 2

[0071] see figure 2 , this figure is a schematic diagram of Embodiment 2 of the dual-channel symmetrical output adjustable power supply provided by the present invention, compared with figure 1 As shown, a more specific structure for realizing the adjustable power supply is provided.

[0072] The positive adjustment module includes: a first adjustment tube 201, a first resistor R1, a second resistor R2 and a second operational amplifier A2;

[0073] The first end of the first adjustment transistor 201 is connected to the positive voltage +V, the second end of the first adjustment transistor 201 is connected to the positive output voltage +Vout, and the control end of the first adjustment transistor 201 is connected to The output terminal of the second operational amplifier A2;

[0074] The inverting input terminal of the second operational amplifier A2 is connected to the positive output voltage +Vout through the first resistor R1, and the non-inverting input terminal of th...

Embodiment 3

[0090] see image 3 , this figure is a schematic diagram of the third implementation of the dual-channel symmetrical output adjustable power supply provided by the present invention, compared with figure 2 As shown, a more specific circuit implementation structure of an adjustable power supply is provided.

[0091] The dual-channel symmetrical output adjustable power supply also includes: a symmetrical control module;

[0092] It can be understood that the switching power supply uses the dual-wire parallel winding process of the transformer secondary and the device parameter control of the output circuit, which in principle has guaranteed the symmetrical output of positive voltage +V and negative voltage -V. Symmetrical control module, used to prevent light load oscillation and avoid output asymmetry caused by inconsistent load.

[0093] The symmetrical control module includes: a fourth operational amplifier A4, a positive load adjustment module 401, a negative load adjustm...

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PUM

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Abstract

The invention provides a two-path symmetrical-output adjustable power source. According to the two-path symmetrical-output adjustable power source, a direct-current power source is connected with the first input end of a switching-mode power source module. The switching-mode power source module is used for controlling and outputting a positive voltage and a negative voltage according to the error between a reference voltage and an output voltage of a first operational amplifier. The positive voltage and the negative voltage are in common-ground link, and absolute values of the positive voltage and the negative voltage are equal. The input end of a positive adjusting module is connected with the positive voltage, and the output end of the positive adjusting module is used for outputting a positive output voltage of the adjustable power source and used for adjusting the positive output voltage according to feedback of a given voltage and the positive output voltage. The input end of a negative adjusting module is connected with the negative voltage, and the output end of the negative adjusting module is used for outputting a negative output voltage of the adjustable power source and used for adjusting the negative output voltage according to the positive output voltage. The positive phase input end of the first operational amplifier is connected with the positive voltage, the inverted phase input end of the first operational amplifier is connected with the positive output voltage, and the output end of the first operational amplifier is connected with the second input end of the switching-mode power source module. The positive path of voltage and the negative path of voltage are traced, load current is balanced, and output symmetry is guaranteed.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a dual-channel symmetrical output adjustable power supply. Background technique [0002] Adjustable power supply is an electronic device that converts DC input power into a special form of power supply. It has been widely used in various industries, such as medical, military and industrial control fields. With the continuous development and progress of science and technology, many new requirements have been put forward for the accuracy, performance, specifications, volume, and intelligent operation of adjustable power supplies. [0003] Dual-channel symmetrical output adjustable power supply, that is, output two adjustable positive and negative voltages with equal absolute values ​​at the same time. [0004] The dual symmetrical adjustable power supply has two modes: switching power supply and linear power supply. [0005] The adjustable output of the switching power supply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56H02M3/158H02M1/009
Inventor 梁爱东赵健
Owner NEUSOFT MEDICAL SYST CO LTD
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