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Voltage compensation circuit and voltage compensation method

A technology of voltage compensation and compensation resistance, which is applied in the field of voltage compensation circuit and voltage compensation, and can solve problems such as power supply misjudgment, output voltage error, and feedback instability

Active Publication Date: 2020-11-24
CHICONY POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned improvement method may cause a misjudgment of the power supply due to the instability of the feedback of the load test, and then cause wrong or inaccurate compensation of the output voltage.

Method used

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  • Voltage compensation circuit and voltage compensation method
  • Voltage compensation circuit and voltage compensation method
  • Voltage compensation circuit and voltage compensation method

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Embodiment Construction

[0053] Please refer to Figure 1 , Figure 1 Is a schematic diagram of a voltage compensation circuit according to an embodiment of the present invention. In this embodiment, the voltage compensation circuit 100 is suitable for compensating the voltage value of the output power Vo of the power supply PSU. The voltage compensation circuit 100 includes a current detection unit 110, a voltage conversion unit 120, a voltage comparison unit 130, a control circuit 140, and a voltage compensation unit 150. The current detection unit 110 detects the load current ILD provided by the power supply PSU. The current detection unit 110 is arranged on the power transmission line between the power supply PSU and the load LD. The current detection unit 110 can also be arranged in the power transmission line inside the power supply PSU.

[0054] In this embodiment, the current detection unit 110 may be a circuit including at least a detection inductor (not shown). The inductor and the power transmiss...

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Abstract

A voltage compensation circuit and a voltage compensation method are provided. The voltage compensation circuit detects the load current provided by a power supply, generates a load voltage accordingto the load current, and compares the load voltage with at least one reference voltage to generate a switch control signal. The voltage compensation circuit further drives the at least one switch according to the switch control signal, provides a compensation resistance value according to the at least one switch that is turned on, and provides a compensation voltage to the power supply, so that the power supply provides a precise output voltage.

Description

Technical field [0001] The invention relates to a voltage compensation circuit and a voltage compensation method, in particular to a voltage compensation circuit and a voltage compensation method which can improve the supply accuracy of output voltage. technical background [0002] The power supply can provide output power to the load. When the load changes or the load demand for power increases, the voltage value of the output power supply will decrease. Especially when the load demands more power, the output voltage will decrease more. Generally speaking, the current improvement method is to sense the feedback result of the change of the output power from the load measurement, and then make the power supply compensate the output power according to the feedback result from the load measurement, so as to compensate the transmission loss between the power supply and the load, for example, the voltage value of the output voltage is reduced due to the power loss caused by the power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/565
CPCG05F1/565H02M3/10H02M1/0019H02M1/0025H02M1/0009H02M3/156
Inventor 陈威远刘宥辰
Owner CHICONY POWER TECH CO LTD
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