CN113687681A - Power module, operational amplifier driving and dimming glass - Google Patents
Power module, operational amplifier driving and dimming glass Download PDFInfo
- Publication number
- CN113687681A CN113687681A CN202110964608.6A CN202110964608A CN113687681A CN 113687681 A CN113687681 A CN 113687681A CN 202110964608 A CN202110964608 A CN 202110964608A CN 113687681 A CN113687681 A CN 113687681A
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- output
- resistor
- output end
- node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011521 glass Substances 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 101100015484 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GPA1 gene Proteins 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 101100067427 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FUS3 gene Proteins 0.000 description 3
- 101100115778 Caenorhabditis elegans dac-1 gene Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
The embodiment of the invention relates to a power module, an operational amplifier driving and dimming glass, which comprises: the feedback control circuit comprises a signal output module, a feedback control circuit and a power supply module; the signal output module is provided with a first output end, and the power supply module is provided with a second output end, a third output end, a first receiving end and a second receiving end; the input end of the feedback control circuit is connected with the first output end, the second output end and the third output end, the fourth output end of the feedback control circuit is connected with the first receiving end, and the fifth output end of the feedback control circuit is connected with the second receiving end; the second output end and the third output end are respectively connected with a voltage input end in the operational amplifier drive of the dimming glass, the output voltage of the first output end of the control signal output module is used for realizing the adjustment control of the output voltages of the second output end and the third output end of the power module, the heat consumption of the operational amplifier in the operational amplifier drive is reduced, the problem of heating of the drive board is solved, and the stability of the drive board is improved.
Description
Technical Field
The embodiment of the invention relates to the field of semiconductors, in particular to a power module, an operational amplifier drive and dimming glass.
Background
At present, the application of the light control glass in the building and traffic fields is more and more extensive, and the light control glass can realize the switching between the transparent state and the non-transparent state of the glass by various modes such as electric control, temperature control, light control, voltage control and the like.
In the related art, the electrically controlled dimming glass is usually implemented by full-bridge driving or Operational Amplifier driving, and the dimming glass driven by the Operational Amplifier is used, and an Operational Amplifier (OPA) in the corresponding Operational Amplifier driving, which is abbreviated as "Operational Amplifier", is usually supplied with a fixed voltage by a voltage source, so that when a difference between a power supply voltage and an output voltage of the Operational Amplifier is large in a working process of the Operational Amplifier, the dimming glass consumes a large amount of power and generates heat.
Disclosure of Invention
In view of the above, in order to solve the above technical problems or some technical problems, embodiments of the present invention provide a power module, an operational amplifier driver, and a light control glass.
In a first aspect, an embodiment of the present invention provides a power module applied to a light-adjusting glass, where the power module includes:
the feedback control circuit comprises a signal output module, a feedback control circuit and a power supply module;
the signal output module is provided with a first output end, and the power supply module is provided with a second output end, a third output end, a first receiving end and a second receiving end;
the input end of the feedback control circuit is connected with the first output end, the second output end and the third output end, the fourth output end of the feedback control circuit is connected with the first receiving end, and the fifth output end of the feedback control circuit is connected with the second receiving end;
the second output end and the third output end are respectively connected with a voltage input end in the operational amplifier driving of the dimming glass.
In one possible embodiment, the feedback control circuit includes:
the first operational amplifier unit, the second operational amplifier unit and the inverter unit;
a first inverting input end of the first operational amplifier unit is connected with the first output end and a first operational amplifier output end, a first non-inverting input end of the first operational amplifier unit is connected with the second output end, and the first operational amplifier output end is connected with the first receiving end;
a second positive phase input end of the second operational amplifier unit is connected with the second output end, a second negative phase input end of the second operational amplifier unit is connected with a third operational amplifier output end and a second operational amplifier output end of the phase inverter unit, and the second operational amplifier output end is connected with the second receiving end;
and a third positive phase input end of the phase inverter unit is connected with a third grounding signal output end, and a third negative phase input end of the phase inverter unit is connected with the first output end and the third operational amplifier output end.
In one possible embodiment, the first operational amplifier unit includes: the circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor and a fourth resistor;
the first non-inverting input terminal of the first operational amplifier is connected with a first node;
the first inverting input end of the first operational amplifier is connected with a second node;
the first operational amplifier output end of the first operational amplifier is connected with a third node;
one end of the first resistor is connected with the second output end, and the other end of the first resistor is connected with the first node;
one end of the second resistor is connected with the first node, and the other end of the second resistor is connected with a first grounding signal output end;
one end of the third resistor is connected with the second node, and the other end of the third resistor is connected with the first output end;
one end of the fourth resistor is connected with the second node, and the other end of the fourth resistor is connected with the third node.
In one possible embodiment, the second operational amplifier unit includes: the second operational amplifier, the fifth resistor, the sixth resistor, the seventh resistor and the eighth resistor;
the second non-inverting input terminal of the second operational amplifier is connected with a fourth node;
the second inverting input end of the second operational amplifier is connected with a fifth node;
the second operational amplifier output end of the second operational amplifier is connected with a sixth node;
one end of the fifth resistor is connected with the third output end, and the other end of the fifth resistor is connected with the fourth node;
one end of the sixth resistor is connected with the fourth node, and the other end of the sixth resistor is connected with a second grounding signal output end;
one end of the seventh resistor is connected with the fifth node, and the other end of the seventh resistor is connected with a seventh node;
one end of the eighth resistor is connected with the fifth node, and the other end of the eighth resistor is connected with the sixth node.
In one possible embodiment, the inverter unit includes: a third operational amplifier, a ninth resistor, a tenth resistor and an eleventh resistor;
the third positive phase input end of the third operational amplifier is connected with the third ground signal output end through the ninth resistor;
the third inverting input end of the third operational amplifier is connected with an eighth node;
the third operational amplifier output end of the third operational amplifier is connected with a seventh node;
one end of the tenth resistor is connected with the first output end, and the other end of the tenth resistor is connected with the eighth node;
one end of the eleventh resistor is connected with the seventh node, and the other end of the eleventh resistor is connected with the eighth node.
In a possible embodiment, the third node is further connected to the first receiving end;
the first receiving end is configured to receive a processing result of the first operational amplifier, and the power supply module controls the output voltage of the second output end according to the processing result, where the processing result is calculated by the first operational amplifier through the output voltage of the first output end and the output voltage of the second output end.
In a possible embodiment, the sixth node is further connected to the second receiving end;
the second receiving end is configured to receive a processing result of the second operational amplifier, and the power supply module controls an output voltage of the third output end according to the processing result, where the processing result is calculated by the second operational amplifier through the output voltage of the first output end and the output voltage of the third output end.
In one possible embodiment, the first output terminal of the signal output module outputs a variable voltage signal, and the output voltage of the second output terminal and the output voltage of the third output terminal of the power supply module are controlled by the variable voltage signal output by the first output terminal.
In a second aspect, an embodiment of the present invention provides an operational amplifier driver, including: the power supply module according to any one of the first aspect, wherein the power supply module is configured to supply power to a fourth operational amplifier in the operational amplifier driver.
In a third aspect, an embodiment of the present invention provides a light control glass, including: an operational amplifier drive as described in the second aspect.
According to the power module provided by the embodiment of the invention, the monitoring and feedback of the output voltages of the second output end and the third output end of the power module are realized by adding the feedback control circuit, and then the regulation control of the output voltages of the second output end and the third output end of the power module is realized by controlling the output voltage of the first output end of the signal output module, so that the heat consumption of an operational amplifier in the operational amplifier driving is reduced, the problem of heating of the driving plate is solved, and the stability of the driving plate is improved.
Drawings
Fig. 1 is a schematic structural diagram of a power module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another power module according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of another power module according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a light control glass according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the convenience of understanding of the embodiments of the present invention, the following description will be further explained with reference to specific embodiments, which are not to be construed as limiting the embodiments of the present invention.
Fig. 1 is a schematic structural diagram of a power module according to an embodiment of the present invention, and as shown in fig. 1, the power module specifically includes:
the device comprises a signal output module 10, a feedback control circuit 20 and a power supply module 30;
the signal output module 10 is provided with a first output end, and the power supply module 30 is provided with a second output end, a third output end, a first receiving end and a second receiving end;
an input end of the feedback control circuit 20 is connected to the first output end, the second output end and the third output end, a fourth output end of the feedback control circuit 20 is connected to the first receiving end, and a fifth output end of the feedback control circuit 20 is connected to the second receiving end;
the second output end and the third output end are respectively connected with a voltage input end in the operational amplifier driving of the dimming glass.
Further, the second output terminal and the third output terminal of the power module 30 respectively output corresponding positive and negative voltage signals to power the operational amplifier driver in the light control glass, and the voltages output by the second output terminal and the third output terminal of the power module 30 are not constant, and can be adjusted along with the change of the voltage signal output by the first output terminal of the signal output module 10.
The control process of the output voltage signals corresponding to the second output terminal and the third output terminal of the power module 30 may be: the feedback control circuit 20 processes the output voltage of the first output terminal of the signal output module 10 and the output voltage of the second output terminal of the power module 30 to obtain a processing result, and feeds the processing result back to the first receiving terminal of the power module 30 through the fourth output terminal, and the power module 30 controls the output voltage of the second output terminal of the power module 30 according to the processing result; or, the feedback control circuit 20 processes the output voltage of the first output terminal of the signal output module 10 and the output voltage of the third output terminal of the power module 30 to obtain a processing result, and feeds the processing result back to the second receiving terminal of the power module 30 through the fifth output terminal, and the power module 30 controls the output voltage of the third output terminal of the power module 30 according to the processing result, so as to control the output voltage of the power module 30 through the signal output module 10.
Fig. 2 is a schematic structural diagram of another power module according to an embodiment of the present invention, and as shown in fig. 2, the power module specifically includes:
a signal output module 10, a feedback control circuit 20 (not shown), a power supply module 30;
the feedback control circuit 20 includes: a first operational amplifier unit 21, a second operational amplifier unit 22, and an inverter unit 23;
a first inverting input end of the first operational amplifier unit 21 is connected to the first output end and the first operational amplifier output end, a first non-inverting input end is connected to the second output end, and the first operational amplifier output end is connected to the first receiving end;
a second non-inverting input end of the second operational amplifier unit 22 is connected to the second output end, a second inverting input end is connected to a third operational amplifier output end and a second operational amplifier output end of the phase inverter unit, and the second operational amplifier output end is connected to the second receiving end;
a third non-inverting input terminal of the phase inverter unit 23 is connected to a third ground signal output terminal, and a third inverting input terminal is connected to the first output terminal and the third operational amplifier output terminal.
Further, a first output end of the signal output module 10 outputs a positive voltage signal, a second output end of the power module 30 outputs a positive voltage signal to the operational amplifier driver, and a third output end outputs a negative voltage signal to the operational amplifier driver.
Accordingly, in order to make the polarities of the voltage signals output by the first operational amplifier unit 21 and the second operational amplifier unit 22 opposite, the inverter unit 23 is added before the voltage signal is input to one end of the second operational amplifier unit 22, that is, the voltage output to the second operational amplifier unit 22 via the inverter unit 23 has the opposite polarity to the voltage output by the third output terminal of the power module 30.
Fig. 3 is a schematic structural diagram of another power module according to an embodiment of the present invention, and as shown in fig. 3, the power module 100 specifically includes:
a signal output module 10, a feedback control circuit 20 (not shown), a power supply module 30;
the feedback control circuit 20 includes: a first operational amplifier unit 21, a second operational amplifier unit 22, and an inverter unit 23;
the first operational amplifier unit 21 includes: the circuit comprises a first operational amplifier 211, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4;
the first non-inverting input terminal of the first operational amplifier 211 is connected to a first node N1;
the first inverting input terminal of the first operational amplifier 211 is connected to a second node N2;
the first operational amplifier output terminal of the first operational amplifier 211 is connected to a third node N3;
one end of the first resistor R1 is connected to the second output terminal (+ VCC), and the other end is connected to the first node N1;
one end of the second resistor R2 is connected with the first node N1, and the other end is connected with a first ground signal output end;
one end of the third resistor R3 is connected to the second node N2, and the other end is connected to the first output terminal (DAC 1);
one end of the fourth resistor R4 is connected to the second node N2, and the other end is connected to the third node N3.
The second operational amplifier unit 22 includes: the second operational amplifier 221, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8;
the second non-inverting input terminal of the second operational amplifier 221 is connected to a fourth node N4;
the second inverting input terminal of the second operational amplifier 221 is connected to a fifth node N5;
the second operational amplifier output terminal of the second operational amplifier 221 is connected to a sixth node N6;
one end of the fifth resistor R5 is connected to the third output terminal (-VCC), and the other end is connected to the fourth node N4;
one end of the sixth resistor R6 is connected to the fourth node N4, and the other end is connected to a second ground signal output end;
one end of the seventh resistor R7 is connected with the fifth node N5, and the other end is connected with a seventh node N7;
one end of the eighth resistor R8 is connected to the fifth node N5, and the other end is connected to the sixth node N6.
The inverter unit 23 includes: a third operational amplifier 231, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11;
the third non-inverting input terminal of the third operational amplifier 231 is connected to the third ground signal output terminal through the ninth resistor R9;
the third inverting input terminal of the third operational amplifier 231 is connected to an eighth node N8;
the third operational amplifier output terminal of the third operational amplifier 231 is connected to a seventh node N7;
one end of the tenth resistor R10 is connected to the first output terminal (DAC1), and the other end is connected to the eighth node N8;
one end of the eleventh resistor R11 is connected to the seventh node N7, and the other end is connected to the eighth node N8.
In an alternative, the power supply input of the power module 30 may be (V)1CC), the power supply input terminals of the first operational amplifier 211, the second operational amplifier 221 and the third operational amplifier 231 may be (V)2CC)。
It should be noted that: the above-mentioned node (N1-N8) is an electrical connection point formed by at least two electronic components or input/output ends of electronic components in the feedback control circuit, for example, the first node N1 is an electrical connection point formed by connecting a first non-inverting input terminal of the first operational amplifier, a first resistor and a second resistor; the second node N2 is an electrical connection point formed by the connection among the first inverting input terminal of the first operational amplifier, the third resistor and the fourth resistor; the third node N3 is an electrical connection point formed by the connection among the first operational amplifier output terminal of the first operational amplifier, the fourth resistor, and the first receiving terminal (+ FB) of the power module.
The fourth node N4 is an electrical connection point formed by the connection among the second non-inverting input terminal of the second operational amplifier, the fifth resistor and the sixth resistor; the fifth node N5 is an electrical connection point formed by the connection among the second inverting input terminal of the second operational amplifier, the seventh resistor and the eighth resistor; the sixth node N6 is an electrical connection point formed by the connection of the second operational amplifier output terminal of the second operational amplifier, the eighth resistor, and the second receiving terminal (-FB) of the power module.
The seventh node N7 is an electrical connection point formed by the connection among the third operational amplifier output terminal, the seventh resistor and the eleventh resistor of the third operational amplifier; the eighth node N8 is an electrical connection point formed by the connection among the third inverting input terminal of the third operational amplifier, the tenth resistor and the eleventh resistor.
It should be noted that: the signal output module 10 may be a controller with a voltage signal output terminal, such as a Microprocessor (MCU), and the first output terminal of the signal output module 10 may be a port for outputting a variable voltage signal, for example, an output port (DAC1) after performing digital-to-analog conversion on the voltage signal, and the first output terminal is used for outputting the variable voltage signal to the inverting input terminals of the first and third operational amplifiers in the feedback control circuit 20.
In an alternative of this embodiment, the signal output module 10 may be further provided with a sixth output terminal (DAC2), which is similar to the first output terminal except that the sixth output terminal is used for outputting the initial voltage signal to a fourth non-inverting input terminal of a fourth operational amplifier in the operational amplifier driving.
The power module 30 may be a voltage source with a voltage transformation function, for example, a DC-DC power supply, where a second output terminal of the power module 30 outputs a variable positive voltage signal (+ VCC), and a third output terminal outputs a variable negative voltage signal (-VCC), so that the positive voltage signal and the negative voltage signal output by the power module 30 supply power to a fourth operational amplifier in the operational amplifier driver; the power module 30 is further provided with a first receiving terminal (+ FB) and a second receiving terminal (-FB), where the first receiving terminal (+ FB) is configured to receive a processing result output by the first operational amplifier 211 in the feedback control circuit 20, and the power module adjusts an output voltage of the second output terminal according to the processing result; the second receiving terminal (-FB) is configured to receive a processing result output by the second operational amplifier 221 in the feedback control circuit 20, and the power supply module adjusts an output voltage of the third output terminal according to the processing result, so as to adjust power supplied by the power supply module 20 to a fourth operational amplifier in the operational amplifier driver.
The power module operating logic includes:
the signal output module 10 outputs an initial voltage signal to a fourth non-inverting input terminal of the fourth operational amplifier 41 in the operational amplifier driving through a sixth output terminal (DAC2), and the power supply module 30 supplies power to the fourth operational amplifier through the second output terminal (+ VCC) and the third output terminal (-VCC), so that the fourth operational amplifier operates and outputs a voltage signal (Vout), where a corresponding current is Iout, where the Vout can be calculated through the initial voltage signal.
From the above, the heat consumption of the operational amplifier can be expressed as:
Q＝K*(VCC-Vout)*Iout
wherein Q is heat loss, K is a constant, and VCC is output voltages of the second output terminal and the third output terminal of the power module 30.
Specifically, the signal output module 10 obtains the output voltage Vout of the fourth operational amplifier and the output voltage VCC of the power module 30, controls the output voltage of the first output terminal (DAC1) of the signal output module 10 according to the difference between VCC and Vout, and adjusts the output voltage of the first output terminal (DAC1) to make the feedback voltage signals received by the first receiving terminal (+ FB) and the second receiving terminal (-FB) of the power module 30 change, and the power module 30 compares the changed feedback voltage signals with the reference voltage of the error amplifier therein, and controls the output voltages of the second output terminal and the third output terminal of the power module 30 according to the comparison result.
Accordingly, the rules of control may be: the feedback voltage signal is greater than the reference voltage of the error amplifier, and the power module 30 controls the output voltages of the second output terminal and the third output terminal to decrease; the feedback voltage signal is equal to the reference voltage of the error amplifier, and the output voltages of the second output end and the third output end of the power supply module 30 are controlled to be unchanged; the feedback voltage signal is smaller than the reference voltage of the error amplifier, and the output voltages of the second output terminal and the third output terminal of the power module 30 are controlled to increase, and for the decreasing or increasing process, it can also be understood that the feedback voltage signal is equal to the reference voltage of the error amplifier by adjusting the output voltages of the second output terminal and the third output terminal of the power module 30.
In the actual working process of the operational amplifier driver, it is acceptable that the operational amplifier driver generates a certain amount of heat loss, and the heat loss can be set by adjusting the magnitude of the reference voltage of the error amplifier or setting a threshold corresponding to the difference between the two, which is not specifically limited in this embodiment.
In this embodiment, parameters of each electronic component in the power module (for example, a resistance value of the resistor, an output voltage of the first output terminal of the signal output module, and an output voltage of the second output terminal/the third output terminal of the power module) may be set according to actual needs, which is not limited in this embodiment.
It should be noted that: the output voltage of the second output terminal/the third output terminal in the power module can be understood as a voltage signal with opposite polarity and the same absolute value, and the corresponding first operational amplifier and the second operational amplifier (the voltage processed by the inverter circuit formed by the third operational amplifier is output to the second operational amplifier) also have opposite polarity and the same absolute value.
In an example, if the output voltage range of the power module is 5V to 24V adjustable, set R1 ═ 10K (to perform voltage division, and reduce the voltage input of + VCC to the first non-inverting input terminal), R2 ═ 1K, R3 ═ 1K, and R4 ═ 2K, the output voltage of the first operational amplifier output terminal of the corresponding first operational amplifier is:
UO1＝(R4/R3+1)×(+VCC×R4)/(R1+R2)-(R4/R3)×DAC1
assuming that the positive reference voltage (+ FB) of the error amplifier of the power module is +1V, and assuming that Vout is +24V (i.e. it is desired to adjust + VCC to +24V), the following formula is obtained: DAC1 ═ 2.77V; assuming that Vout is +15V (i.e., it is desired that + VCC be adjusted to +15V), this can be obtained by the above equation: DAC1 ═ 1.55V; assuming that Vout is +10V (i.e., it is desired that + VCC be adjusted to +10V), then this can be obtained by the above equation: DAC1 ═ 0.86V; assuming that Vout is +5V (i.e., it is desired that + VCC be adjusted to +5V), this can be obtained by the above equation: DAC1 ═ 0.18V.
The adjustment to the third output terminal (-VCC) is similar to the adjustment procedure described above, and thus may be an adjustment that controls the forward output voltage of the first output terminal (DAC1) because an inverter is added to the negative feedback branch in the feedback control circuit.
In another example, if the output voltage range of the power module is adjustable from 10V to 36V, R1 ═ 15K, R2 ═ 1K, R3 ═ 1K, and R4 ═ 2K are set, and the output voltage of the first operational amplifier output terminal of the corresponding first operational amplifier is:
UO1＝(R4/R3+1)×(+VCC×R4)/(R1+R2)-(R4/R3)×DAC1
assuming that the positive reference voltage (+ FB) of the error amplifier of the power module is +1V, and assuming that Vout is +36V (i.e. it is desired to adjust + VCC to +36V), the following formula is obtained: DAC1 ═ 2.88V; assuming that Vout is +24V (i.e., it is desired to adjust + VCC to +24V), this can be obtained by the above equation: DAC1 ═ 1.75V; assuming that Vout is +15V (i.e., it is desired that + VCC be adjusted to +15V), this can be obtained by the above equation: DAC1 ═ 0.91V; assuming that Vout is +10V (i.e., it is desired that + VCC be adjusted to +10V), then this can be obtained by the above equation: DAC1 ═ 0.44V.
The adjustment to the third output (-VCC) is similar to the adjustment procedure described above, with an inverter added to the feedback branch being inverted in the feedback control circuit, and thus adjustment to the third output (-VCC) can also be understood to control the adjustment of the forward output voltage of the first output (DAC 1).
According to the power module provided by the embodiment of the invention, the monitoring and feedback of the output voltages of the second output end and the third output end of the power module are realized by adding the feedback control circuit, and then the regulation control of the output voltages of the second output end and the third output end of the power module is realized by controlling the output voltage of the first output end of the signal output module, so that the heat consumption of an operational amplifier in the operational amplifier driving is reduced, the problem of heating of the driving plate is solved, and the stability of the driving plate is improved.
The embodiment of the invention also provides an operational amplifier driver, wherein the power supply module supplies power for the operational amplifier driver, and the operational amplifier driver comprises: and a fourth operational amplifier 41, wherein the second output end and the third output end of the power module 30 in the power module supply power to the fourth operational amplifier 41.
Fig. 4 is a schematic structural diagram of a light control glass according to an embodiment of the present invention, and as shown in fig. 4, the light control glass specifically includes:
a power module 100, an operational amplifier driver, and a glass 50;
the power module 100 may be the power module as described in any of fig. 1-3, and the power module has a sixth output terminal (DAC2) connected to the fourth non-inverting input terminal of the fourth operational amplifier driver 41 in the operational amplifier driver.
The operational amplifier driver may include: the connection relationship among the fourth operational amplifier driver 41, the DC power source 42, the twelfth resistor R12, the thirteenth resistor R13, and the fourteenth resistor R14 can be referred to fig. 4, and will not be described herein.
A fourth operational amplifier output terminal of the fourth operational amplifier driver 41 in the operational amplifier driver is connected to the glass 50, and is used for sending a driving signal to the glass 50, so that the glass 50 controls liquid crystal molecules inside the glass in response to the driving signal.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a power module which characterized in that is applied to dimming glass, power module includes:
the feedback control circuit comprises a signal output module, a feedback control circuit and a power supply module;
the signal output module is provided with a first output end, and the power supply module is provided with a second output end, a third output end, a first receiving end and a second receiving end;
the input end of the feedback control circuit is connected with the first output end, the second output end and the third output end, the fourth output end of the feedback control circuit is connected with the first receiving end, and the fifth output end of the feedback control circuit is connected with the second receiving end;
the second output end and the third output end are respectively connected with a voltage input end in the operational amplifier driving of the dimming glass.
2. The power module as claimed in claim 1, wherein the feedback control circuit comprises:
the first operational amplifier unit, the second operational amplifier unit and the inverter unit;
a first inverting input end of the first operational amplifier unit is connected with the first output end and a first operational amplifier output end, a first non-inverting input end of the first operational amplifier unit is connected with the second output end, and the first operational amplifier output end is connected with the first receiving end;
a second positive phase input end of the second operational amplifier unit is connected with the second output end, a second negative phase input end of the second operational amplifier unit is connected with a third operational amplifier output end and a second operational amplifier output end of the phase inverter unit, and the second operational amplifier output end is connected with the second receiving end;
and a third positive phase input end of the phase inverter unit is connected with a third grounding signal output end, and a third negative phase input end of the phase inverter unit is connected with the first output end and the third operational amplifier output end.
3. The power module of claim 2, wherein the first operational amplifier unit comprises: the circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor and a fourth resistor;
the first non-inverting input terminal of the first operational amplifier is connected with a first node;
the first inverting input end of the first operational amplifier is connected with a second node;
the first operational amplifier output end of the first operational amplifier is connected with a third node;
one end of the first resistor is connected with the second output end, and the other end of the first resistor is connected with the first node;
one end of the second resistor is connected with the first node, and the other end of the second resistor is connected with a first grounding signal output end;
one end of the third resistor is connected with the second node, and the other end of the third resistor is connected with the first output end;
one end of the fourth resistor is connected with the second node, and the other end of the fourth resistor is connected with the third node.
4. The power module of claim 2, wherein the second operational amplifier unit comprises: the second operational amplifier, the fifth resistor, the sixth resistor, the seventh resistor and the eighth resistor;
the second non-inverting input terminal of the second operational amplifier is connected with a fourth node;
the second inverting input end of the second operational amplifier is connected with a fifth node;
the second operational amplifier output end of the second operational amplifier is connected with a sixth node;
one end of the fifth resistor is connected with the third output end, and the other end of the fifth resistor is connected with the fourth node;
one end of the sixth resistor is connected with the fourth node, and the other end of the sixth resistor is connected with a second grounding signal output end;
one end of the seventh resistor is connected with the fifth node, and the other end of the seventh resistor is connected with a seventh node;
one end of the eighth resistor is connected with the fifth node, and the other end of the eighth resistor is connected with the sixth node.
5. The power module as claimed in claim 2, wherein the inverter unit comprises: a third operational amplifier, a ninth resistor, a tenth resistor and an eleventh resistor;
the third positive phase input end of the third operational amplifier is connected with the third ground signal output end through the ninth resistor;
the third inverting input end of the third operational amplifier is connected with an eighth node;
the third operational amplifier output end of the third operational amplifier is connected with a seventh node;
one end of the tenth resistor is connected with the first output end, and the other end of the tenth resistor is connected with the eighth node;
one end of the eleventh resistor is connected with the seventh node, and the other end of the eleventh resistor is connected with the eighth node.
6. The power module as claimed in claim 3, wherein the third node is further connected to the first receiving terminal;
the first receiving end is configured to receive a processing result of the first operational amplifier, and the power supply module controls the output voltage of the second output end according to the processing result, where the processing result is calculated by the first operational amplifier through the output voltage of the first output end and the output voltage of the second output end.
7. The power module as claimed in claim 4, wherein the sixth node is further connected to the second receiving terminal;
the second receiving end is configured to receive a processing result of the second operational amplifier, and the power supply module controls an output voltage of the third output end according to the processing result, where the processing result is calculated by the second operational amplifier through the output voltage of the first output end and the output voltage of the third output end.
8. The power module as claimed in any one of claims 1-6, wherein the first output terminal of the signal output module outputs a variable voltage signal, and the output voltage of the second output terminal and the output voltage of the third output terminal of the power module are controlled by the variable voltage signal output by the first output terminal.
9. An operational amplifier drive, comprising: the power module of any of claims 1-8, wherein the power module is configured to power a fourth operational amplifier in the operational amplifier driver.
10. A light control glass, comprising: the op-amp drive of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110964608.6A CN113687681A (en) | 2021-08-20 | 2021-08-20 | Power module, operational amplifier driving and dimming glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110964608.6A CN113687681A (en) | 2021-08-20 | 2021-08-20 | Power module, operational amplifier driving and dimming glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113687681A true CN113687681A (en) | 2021-11-23 |
Family
ID=78581200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110964608.6A Pending CN113687681A (en) | 2021-08-20 | 2021-08-20 | Power module, operational amplifier driving and dimming glass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113687681A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008102211A (en) * | 2006-10-17 | 2008-05-01 | Matsushita Electric Ind Co Ltd | Drive voltage output circuit |
| CN201780522U (en) * | 2009-07-14 | 2011-03-30 | 昆明理工大学 | Voltage source-adjustable circuit of charge coupled device (CCD) camera for astronomy |
| CN202453759U (en) * | 2012-01-17 | 2012-09-26 | 北京谊安医疗系统股份有限公司 | Bipolar reference voltage source device with driving function |
| CN103178697A (en) * | 2013-03-01 | 2013-06-26 | 圣邦微电子（北京）股份有限公司 | Power system capable of outputting positive voltage and negative voltage |
| CN103368365A (en) * | 2012-04-03 | 2013-10-23 | 鸿富锦精密工业（深圳）有限公司 | Power supply circuit |
| CN103560575A (en) * | 2013-11-12 | 2014-02-05 | 京东方科技集团股份有限公司 | Power supply device and electronic equipment |
| CN104393760A (en) * | 2014-11-27 | 2015-03-04 | 中国兵器工业集团第二一四研究所苏州研发中心 | Positive-negative output low dropout adjusting circuit with short-circuit protection function |
| CN105468079A (en) * | 2015-12-30 | 2016-04-06 | 沈阳东软医疗系统有限公司 | Two-path symmetrical-output adjustable power source |
| CN107844156A (en) * | 2017-10-26 | 2018-03-27 | 广州金升阳科技有限公司 | Voltage divider circuit and application thereof |
| CN207283505U (en) * | 2017-07-24 | 2018-04-27 | 深圳市振华微电子有限公司 | APS amplifier power supply circuit and amplifier system |
| CN109067152A (en) * | 2018-07-13 | 2018-12-21 | 苏州华兴源创科技股份有限公司 | A kind of power supply circuit for the detection of OLED mould group |
| CN208506629U (en) * | 2018-08-20 | 2019-02-15 | 广州思林杰网络科技有限公司 | A kind of power supply circuit based on far-end feedback |
| CN111323632A (en) * | 2019-07-15 | 2020-06-23 | 国网江西省电力有限公司电力科学研究院 | AC/DC zero-flux fluxgate current sensor and program control configuration and calibration method thereof |
| CN111524491A (en) * | 2019-02-03 | 2020-08-11 | 京东方科技集团股份有限公司 | Drive circuit and drive method of light control glass and light control glass device |
-
2021
- 2021-08-20 CN CN202110964608.6A patent/CN113687681A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008102211A (en) * | 2006-10-17 | 2008-05-01 | Matsushita Electric Ind Co Ltd | Drive voltage output circuit |
| CN201780522U (en) * | 2009-07-14 | 2011-03-30 | 昆明理工大学 | Voltage source-adjustable circuit of charge coupled device (CCD) camera for astronomy |
| CN202453759U (en) * | 2012-01-17 | 2012-09-26 | 北京谊安医疗系统股份有限公司 | Bipolar reference voltage source device with driving function |
| CN103368365A (en) * | 2012-04-03 | 2013-10-23 | 鸿富锦精密工业（深圳）有限公司 | Power supply circuit |
| CN103178697A (en) * | 2013-03-01 | 2013-06-26 | 圣邦微电子（北京）股份有限公司 | Power system capable of outputting positive voltage and negative voltage |
| CN103560575A (en) * | 2013-11-12 | 2014-02-05 | 京东方科技集团股份有限公司 | Power supply device and electronic equipment |
| CN104393760A (en) * | 2014-11-27 | 2015-03-04 | 中国兵器工业集团第二一四研究所苏州研发中心 | Positive-negative output low dropout adjusting circuit with short-circuit protection function |
| CN105468079A (en) * | 2015-12-30 | 2016-04-06 | 沈阳东软医疗系统有限公司 | Two-path symmetrical-output adjustable power source |
| CN207283505U (en) * | 2017-07-24 | 2018-04-27 | 深圳市振华微电子有限公司 | APS amplifier power supply circuit and amplifier system |
| CN107844156A (en) * | 2017-10-26 | 2018-03-27 | 广州金升阳科技有限公司 | Voltage divider circuit and application thereof |
| CN109067152A (en) * | 2018-07-13 | 2018-12-21 | 苏州华兴源创科技股份有限公司 | A kind of power supply circuit for the detection of OLED mould group |
| CN208506629U (en) * | 2018-08-20 | 2019-02-15 | 广州思林杰网络科技有限公司 | A kind of power supply circuit based on far-end feedback |
| CN111524491A (en) * | 2019-02-03 | 2020-08-11 | 京东方科技集团股份有限公司 | Drive circuit and drive method of light control glass and light control glass device |
| CN111323632A (en) * | 2019-07-15 | 2020-06-23 | 国网江西省电力有限公司电力科学研究院 | AC/DC zero-flux fluxgate current sensor and program control configuration and calibration method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102541142B (en) | Comparer, the control circuit utilizing the switching regulaor of this comparer, switching regulaor, electronic equipment | |
| EP1977503B1 (en) | Apparatus, method and system for control of ac/ac conversion | |
| CN102612227B (en) | Mixed light adjusting circuit and mixed light adjusting method thereof | |
| JP4833812B2 (en) | PWM drive device and output offset correction method thereof | |
| RU2658799C2 (en) | Backlight source drive circuit, liquid crystal display device and drive method | |
| CN103917011B (en) | A kind of white LED driver system with soft-start module | |
| CN105592590A (en) | Constant-power LED driving power supply circuit system | |
| CN113687681A (en) | Power module, operational amplifier driving and dimming glass | |
| WO2014180056A1 (en) | Led backlight driving circuit, liquid crystal display apparatus, and driving method | |
| KR20150132160A (en) | System and method for powering dual magnetrons using a dual power supply | |
| CN112399676A (en) | Constant current driving circuit, calibration method thereof and lighting device | |
| CN102136799B (en) | Current mode converter with self-calibration output | |
| CN110943620A (en) | Phase-shifting sliding mode control method and system of LLC resonant DC converter | |
| CN114153258A (en) | Power supply closed-loop feedback control circuit and control method | |
| JP2024525932A (en) | Driver for supplying current to an LED load | |
| CN113258435B (en) | Narrow-pulse-width high-power laser constant-current driving circuit and optical module | |
| CN213818277U (en) | Constant current drive circuit and lighting device | |
| CN112333894B (en) | Dimming control circuit and method | |
| JP2005168229A (en) | Power supply device | |
| CN107196509A (en) | A kind of DC to DC converter and electronic equipment | |
| CN114499261A (en) | Double-shaft vibrating mirror driving circuit and system thereof | |
| JP2004318339A (en) | Dropper type regulator and power unit using same | |
| US11075618B2 (en) | Pulse width modulation signal generator | |
| CN104850163B (en) | A kind of DC-stabilized circuit | |
| US20240372456A1 (en) | A driver for delivering current to a led load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211123 |