Charging circuit with temperature compensation function and its control circuit
A technology of temperature compensation and charging circuit, which is applied in the direction of control/regulation system, photovoltaic power generation, and regulation of electric variables, etc., and can solve the problems that the temperature coefficient of the solar power module cannot generate temperature compensation, etc.
Active Publication Date: 2021-08-31
RICHTEK TECH
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Problems solved by technology
[0009] The disadvantage of the prior art is that: the prior art requires the use of a calculator and memory, and the calculation of the measured voltage and current to obtain the maximum power point Mpp
However, the prior art does not propose a solution to this problem
In short, the existing technology is not able to generate temperature compensation for the temperature coefficient of the solar power module
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[0092] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings.
[0093] The drawings in the present invention are all schematic diagrams, mainly intended to show the coupling relationship between various circuits and the relationship between various signal waveforms. As for the circuits, signal waveforms and frequencies, they are not drawn to scale.
[0094] In an embodiment, the charging circuit with temperature compensation function of the present invention can be implemented in a constant current control mode. In another embodiment, the charging circuit with temperature compensation function of the present invention can be implemented in a constant voltage control mode.
[0095] The following first describes how the charging circuit with temperature compensation function of the present invention is impl...
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The invention proposes a charging circuit with temperature compensation function and its control circuit. The charging circuit with temperature compensation function includes: power conversion circuit, input voltage sensing circuit, output adjustment circuit and charging control circuit. The power conversion circuit converts the input voltage provided by the solar power module into an output voltage. The input voltage sensing circuit generates an input voltage related signal according to the input voltage. The output adjustment circuit generates an output adjustment signal according to the input voltage related signal. The charging control circuit generates a control signal according to the output adjustment signal, thereby adjusting the output current output by the power conversion circuit. When the level of the input voltage is lower than the preset voltage value, the power conversion circuit reduces the output current it outputs.
Description
technical field [0001] The present invention relates to a charging circuit with a temperature compensation function and its control circuit, in particular to a method that can obtain the maximum power point Mpp (Maximum PowerPoint) of a solar power module without using a calculator and memory, and A charging circuit with a temperature compensation function and a control circuit thereof capable of generating a temperature compensation (Automatic Temperature Compensation) function for the temperature coefficient (Temperature Coefficient) of the solar power module. Background technique [0002] Please refer to Figure 1A , which shows the V-I characteristic curve of the relationship between the voltage V and the current I of the solar power module in the prior art at a fixed temperature. [0003] Figure 1A It is the V-I characteristic curve of the solar power module in the prior art under six different sunlight intensities at a fixed temperature of 25°C. Such as Figure 1A As...
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IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 刘国基何昌祐
Owner RICHTEK TECH