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Ripple power supply device and method for providing direct-current voltage with ripples

A technology of DC voltage and power supply device, which is applied in output power conversion device, DC power input conversion into DC power output, electrical components and other directions, can solve the problems of high cost and insufficient voltage load capacity, and achieve strong load capacity. , the effect of simple circuit design

Active Publication Date: 2013-01-16
HYTERA COMM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an easy-to-implement, low-cost and high-carrying capacity solution for the problems of insufficient voltage load capacity and high cost in the prior art when providing DC voltage with ripples. Ripple power supply device and method for providing DC voltage with ripple

Method used

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  • Ripple power supply device and method for providing direct-current voltage with ripples

Examples

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Effect test

Embodiment 1

[0043] In Example 1, LVR U11 is LM2941T, Q1 is 2SK1824, U2 and U3 are both LM324, R1 is 4.7KΩ, R2 is 22Ω, R3 is 47KΩ, R4 is 1KΩ, R5 is 100KΩ, R6 is 10KΩ, R7 is 10KΩ and C2 is 100µF. The output of the ripple power supply device is connected to a 300mA load, and its input voltage Uin is 12V. like Figure 2c As shown, the figure shows the waveform of the output voltage tested when a 1.5V DC voltage is applied to the control voltage input without applying a ripple signal. Obviously, the output voltage waveform at this time is a DC output waveform without ripple (or without interference signal), and its voltage value is 8.1V, which has a certain load capacity. like Figure 2d As shown, it is the waveform of the output voltage tested when 1.5V DC voltage and 220mV, 100Hz sinusoidal ripple signal are applied to the control voltage input terminal at the same time. The output voltage waveform at this time is also a sine wave, which is at Figure 2c The 8.1V DC voltage is superimpo...

Embodiment 2

[0048] In Example 2, DC-DC U21 is TPS5450, Q1 is 2SK1824, U2 and U3 are LM324, R1 is 4.7KΩ, R2 is 22Ω, R3 is 47KΩ, R4 is 1KΩ, R5 is 100KΩ, R6 is 10KΩ, R7 is 10KΩ and C2 is 100μF. The output of the ripple power supply device is connected to a 1.5A load, and its input voltage Uin is 15V. like Figure 3b As shown in , it is the waveform of the output voltage tested when a 2.7V DC voltage is applied to the control voltage input terminal without applying a ripple signal. Obviously, the output voltage waveform at this time is a DC output waveform without ripple (or without interference signal), and its voltage value is 13.2V, which has a certain load capacity. like Figure 3c As shown, it is the waveform of the output voltage tested when 2.7V DC voltage and 220mV, 4000Hz sinusoidal ripple signal are applied to the control voltage input terminal at the same time. The output voltage waveform at this time is also a sine wave, which is at Figure 3b The 13.2V DC voltage is superimp...

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Abstract

The invention belongs to the technical field of power supply circuits, and discloses a ripple power supply device and a method for providing a direct-current voltage with ripples. The ripple power supply device comprises a voltage stabilizing chip of a power supply and a voltage stabilizing circuit, wherein a control voltage is applied to a control voltage input end of the voltage stabilizing circuit, so that the output voltage of the voltage stabilizing chip of the power supply can be adjusted; and when the control voltage consists of direct-current voltage signals and ripple signals, both of the ripple signals and the direct-current voltage signals are transmitted to a voltage feedback end of the voltage stabilizing chip of the power supply by the voltage stabilizing circuit, so that the direct-current voltage with the ripple can be acquired at the voltage output end of the voltage stabilizing chip of the power supply. According to the ripple power supply device and the method for providing the direct-current voltage with the ripples, the direct-current voltage overlapped with the ripple voltage can be acquired at the voltage output end when the ripple signals and the direct-current voltage signals are both applied to the voltage feedback end due to the characteristic that the output voltage of the voltage stabilizing chip of the power supply is controlled by the voltage feedback end; the output voltage has relatively high loading capacity; and the overlapped ripple voltage can be controlled in frequency and amplitude, thereby meeting different test requirements.

Description

technical field [0001] The invention belongs to the technical field of power supply circuits, and more specifically relates to a ripple power supply device and a method for providing a DC voltage with ripples. Background technique [0002] When evaluating circuit performance, it is usually necessary to test the anti-interference ability of lines and electronic equipment to power ripple. This requires a power supply with interference signal components, which can provide a DC voltage with ripples, and requires the voltage it provides to have a certain load capacity, and the amplitude and frequency of the ripples can be changed as needed. In the prior art, when a signal generator or a comprehensive tester is used to provide such a DC voltage with ripples, the provided voltage often has insufficient load capacity; if a dedicated power supply is used, the test cost will be too high. Contents of the invention [0003] The technical problem to be solved by the present invention ...

Claims

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Application Information

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IPC IPC(8): H02M3/00H02M3/157
Inventor 黄笛郝尤国雄潘启辉卢良飞
Owner HYTERA COMM CORP
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