CN110134026B - A low power consumption control circuit for smart home appliances - Google Patents
A low power consumption control circuit for smart home appliances Download PDFInfo
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- CN110134026B CN110134026B CN201910492131.9A CN201910492131A CN110134026B CN 110134026 B CN110134026 B CN 110134026B CN 201910492131 A CN201910492131 A CN 201910492131A CN 110134026 B CN110134026 B CN 110134026B
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Abstract
一种用于智能家电的低功耗控制电路，包括一整流模块、一恒压控制芯片、一降压变换模块以及一负载补偿模块，该整流模块接收一交流电并输出一第一直流电力，该恒压控制芯片的一汲极端耦接该整流模块，该降压变换模块耦接于该整流模块、该恒压控制芯片的该电源端，该降压变换模块接收该第一直流电力并降压转换后输出一第二直流电力且通过该电源端供电给该恒压控制芯片，并让该恒压控制芯片采样该电源端作为一回馈信号而调节该第二直流电力，该负载补偿模块电连接该电源端，该负载补偿模块提供一补偿电压以提升基于一外部负载而产生的一负载调整率。
A low-power control circuit for smart home appliances includes a rectifier module, a constant voltage control chip, a buck conversion module and a load compensation module. The rectifier module receives an alternating current and outputs a first direct current. A drain terminal of the constant voltage control chip is coupled to the rectifier module. The buck conversion module is coupled to the rectifier module and the power supply terminal of the constant voltage control chip. The buck conversion module receives the first direct current and outputs a second direct current after buck conversion and supplies power to the constant voltage control chip through the power supply terminal, and allows the constant voltage control chip to sample the power supply terminal as a feedback signal to adjust the second direct current. The load compensation module is electrically connected to the power supply terminal. The load compensation module provides a compensation voltage to improve a load adjustment rate generated based on an external load.
Description
Technical Field
The invention relates to a control circuit, in particular to a low-power consumption control circuit for intelligent household appliances.
Background
The intelligent home appliances generally refer to various home appliances having intelligent characteristics, and in terms of hardware architecture, modules for providing intelligent functions, such as a wireless communication module and a sensor module, are required in addition to existing modules related to the functions of the home appliances. However, when these modules are additionally provided, two major problems are generally considered from the viewpoint of power control, namely, stable power output and standby power consumption.
The conventional power supply control circuit basically comprises a rectifying unit, a control unit and a voltage reducing unit, wherein the control unit comprises a feedback end which can obtain the direct current power output by the voltage reducing unit to a load so as to adjust the direct current power to achieve the purpose of constant voltage output, and on the other hand, the power supply of the control unit is from a Junction GATE FIELD-effect transistor (JFET) arranged in the control unit, however, the JFET provides all power for the control unit through buses and auxiliary windings, besides the complexity of the circuit, the high standby power consumption of the control unit is caused due to the high voltage difference at two ends of the JFET. Accordingly, there is a need for improvements in conventional techniques.
Disclosure of Invention
The invention mainly aims to solve the problem of high power consumption of the existing control circuit for intelligent household appliances.
In order to achieve the above object, the present invention provides a low power consumption control circuit for an intelligent home appliance, which is characterized by comprising:
the rectification module receives alternating current and outputs first direct current power;
The constant voltage control chip comprises a drain terminal, a grounding terminal and a power supply terminal, wherein the drain terminal is coupled with the rectifying module;
A buck conversion module coupled to the rectifying module, the power end of the constant voltage control chip and the ground end, the buck conversion module receiving the first DC power, outputting a second DC power after buck conversion, supplying power to the constant voltage control chip via the power end, and allowing the constant voltage control chip to sample the power end as a feedback signal to regulate the second DC power, and
The load compensation module is electrically connected with the power supply end and provides a compensation voltage to promote a load adjustment rate generated based on an external load.
In one embodiment, the buck conversion module includes a freewheeling diode, an output capacitor coupled in parallel with the freewheeling diode, and an inductor coupled between the freewheeling diode and the output capacitor.
In one embodiment, a cathode of the freewheeling diode is coupled to one end of the inductor and forms a first node, an anode of the freewheeling diode is coupled to the output capacitor, the other end of the inductor is coupled to the output capacitor to form a second node, the first node is coupled to the ground terminal, and the second node is coupled to the power supply terminal of the constant voltage control chip.
In an embodiment, the buck conversion module further includes a bootstrap diode and a supply capacitor coupled to the bootstrap diode, the bootstrap diode including an anode coupled to the second node and a cathode forming a third node with the supply capacitor.
In one embodiment, the constant voltage control chip further includes a current detection terminal coupled to the first node.
In one embodiment, a sense resistor is coupled between the current sense terminal and the first node.
In an embodiment, the constant voltage control chip further includes a feedback end, and at least one feedback resistor is coupled between the feedback end and the buck conversion module to adjust the second dc power.
In an embodiment, the constant voltage control chip further includes a control terminal selectively coupled to the power supply terminal or the ground terminal to adjust the second dc power.
In an embodiment, the load compensation module includes a power supply sampling module and a regulation module, the power supply sampling module is coupled with the power supply end of the constant voltage control chip to output a power supply end sampling signal to the regulation module, and the regulation module receives a reference signal and the power supply end sampling signal to output a load compensation signal coupled with the power supply end.
In an embodiment, the regulation module includes an error amplifier and a regulation unit, a first input terminal of the error amplifier is coupled to the power supply sampling module, an output terminal of the error amplifier is coupled to the regulation unit, and the regulation unit receives the reference signal and feeds back the load compensation signal to a second input terminal of the error amplifier.
In one embodiment, the regulation module comprises:
A first resistor, a first end of which is coupled to the second input end of the error amplifier and forms a fourth node;
a second resistor, a first end of which is coupled to a second end of the first resistor and forms a fifth node for inputting a reference voltage;
a first voltage-controlled current source including an input terminal coupled to the output terminal of the error amplifier, a control terminal coupled to the fifth node, and an output terminal coupled to a second terminal of the second resistor
A second voltage-controlled current source coupled between the power supply terminal and the second input terminal of the error amplifier.
In one embodiment, the power supply sampling signal includes:
A third resistor coupled between the first input terminal and the power supply terminal of the error amplifier, and
And the fourth resistor is coupled with one end of the third resistor and forms a sixth node, and the other end of the fourth resistor is grounded.
In an embodiment, the constant voltage control chip further includes a selection terminal, and the selection terminal selects the second dc power output different from the second dc power output.
In one embodiment, the selection terminal is coupled to the load compensation module.
In one embodiment, the constant voltage control chip further comprises:
A logic controller;
A driver coupled to the logic controller;
A power switch coupled to the driver, and
The comparator is provided with a first input end coupled to the load compensation module, a second input end for inputting a first reference voltage and an output end coupled to the logic controller.
In one embodiment, the voltage value of the second dc power is between 2.5V and 3.3V.
The invention also provides an intelligent household appliance system, which comprises:
A main driving circuit module, which converts an alternating current into a main driving direct current power;
An electric appliance module coupled to the main driving module and inputting the main driving DC power;
a control circuit as described above for outputting the second DC power according to the AC power, and
And the intelligent module works by utilizing the second direct-current power.
In one embodiment, the smart module is a wireless signal receiver or a sensor.
In an embodiment, the voltage value of the second dc power is between 2.5V and 5V.
Meanwhile, the load compensation module is arranged, and the load compensation module samples the voltage of the power supply end, namely the voltage of the power supply end is used as a feedback signal to achieve the regulation of constant voltage, and the sampling feedback voltage of the power supply end is relative to the reference signal of the grounding end of the constant voltage control chip, so that a sampling and holding circuit is not required to be arranged, and the complexity of a circuit structure is reduced.
Drawings
"FIG. 1" is a schematic circuit diagram of a low power control circuit according to an embodiment of the present invention.
FIG. 2 is a schematic circuit diagram of the load compensation module according to an embodiment of the invention.
"FIG. 3" is a schematic circuit diagram of the constant voltage control chip according to another embodiment of the present invention.
"FIG. 4" is a graph showing the load adjustment rate change of an embodiment of the present invention and a comparative example
"FIG. 5" is a standby power consumption comparison chart of an embodiment of the present invention and a comparison example.
"FIG. 6" is a circuit diagram of the comparative example of "FIG. 5".
"FIG. 7" is a circuit diagram of a low power control circuit according to another embodiment of the present invention.
"FIG. 8A" and "FIG. 8B" are schematic circuit diagrams of a low power consumption control circuit according to another embodiment of the present invention.
Fig. 9 is a schematic diagram of an intelligent home appliance system according to an embodiment of the present invention.
Detailed Description
The detailed description and technical content of the present invention will now be described with reference to the drawings, in which:
The present invention discloses a low power consumption control circuit for an intelligent household appliance, in which the intelligent household appliance uses an intelligent lighting, such as an intelligent light emitting diode lamp as an example, please refer to fig. 1, which is a schematic circuit diagram of the low power consumption control circuit according to an embodiment of the present invention, and the low power consumption control circuit comprises a rectifying module 10, a constant voltage control chip 20, a buck conversion module 30 and a load compensation module 40, wherein the rectifying module 10 receives an alternating current Vac, and in an embodiment, the alternating current Vac is an external commercial power. The constant voltage control chip 20 includes a drain terminal D, a ground terminal G, and a power terminal VCC. The rectifying module 10 rectifies the ac voltage Vac to output a first DC voltage DC1, and in this embodiment, the rectifying module 10 includes a rectifying unit 11 and an input capacitor 12 coupled to the rectifying unit 11, and the rectifying module 10 may be a bridge rectifier as shown in the drawing. The coupling of two or more components described herein may be a direct electrical connection between components or an electrical connection between components with other components.
The drain terminal D of the constant voltage control chip 20 is coupled to the rectifying module 10 to receive the first DC power DC1, the buck conversion module 30 is also coupled to the rectifying module 10, the buck conversion module 30 receives the first DC power DC1, then performs buck conversion and outputs a second DC power DC2 to an external load, and in addition, the second DC power DC2 is fed back to the power source terminal VCC of the constant voltage control chip 20 to supply power to the constant voltage control chip 20. In one embodiment of the present invention, the voltage value of the second direct current power DC2 is less than 5V, and in one embodiment, the voltage value of the second direct current power DC2 is between 2.5V and 5V, for example, 3.3V or 2.5V.
The buck conversion module 30 includes a freewheeling diode 31, an output capacitor 32, an inductor 33, a bootstrap diode 34 and a supply capacitor 35, wherein a cathode 31a of the freewheeling diode 31 is coupled to one end 33a of the inductor 33 and forms a first node N1, an anode 31b of the freewheeling diode 31 is coupled to the drain terminal D of the constant voltage control chip 20, the other end 33b of the inductor 33 is coupled to the output capacitor 32 and forms a second node N2, the first node N1 is coupled to the ground terminal G, the second node N2 is coupled to the power source terminal VCC of the constant voltage control chip 20, the supply capacitor 35 is coupled to the bootstrap diode 34, the bootstrap diode 34 includes an anode 34b coupled to the second node N2 and a cathode 34a forming a third node N3 between the freewheeling diode 31 and the supply capacitor 35, and the inductor 33 is coupled between the freewheeling diode 31 and the output capacitor 32.
Referring to fig. 2, in an embodiment of the present invention, the load compensation module 40 includes a power supply sampling module 40a and a regulation module 40b, the power supply sampling module 40a is coupled to the power supply VCC of the constant voltage control chip 20 to output a power supply sampling signal S to the regulation module 40b, the regulation module 40b receives a reference signal and the power supply sampling signal S to output a load compensation signal to the power supply VCC, where the reference signal is Vref. In this embodiment, the regulation module 40b includes an error amplifier 41 and a regulation unit, the regulation unit includes a first resistor 42, a second resistor 43, a first voltage-controlled current source 44 and a second voltage-controlled current source 45, the power supply sampling module 40a includes a third resistor 46 and a fourth resistor 47, the error amplifier 41 includes a first input terminal 41a, a second input terminal 41b and an output terminal 41c, the first resistor 42 includes a first terminal 42a and a second terminal 42b, the second resistor 43 includes a first terminal 43a and a second terminal 43b, and the first voltage-controlled current source 44 includes an input terminal 44a, a control terminal 44b and an output terminal 44c. In the present embodiment, the load compensation module 40 is disposed inside the constant voltage control chip 20, and in other embodiments, the load compensation module 40 can be disposed outside the constant voltage control chip 20.
The first input terminal 41a and the second input terminal 41b of the error amplifier 41 are coupled to the power supply sampling module 40a, the output terminal 41c of the error amplifier 41 is coupled to the regulation unit, and the regulation unit receives the reference signal and feeds back the load compensation signal to the second input terminal 41b of the error amplifier 41.
The first end 42a of the first resistor 42 is coupled to the second input end 41b and forms a fourth node N4, the second end 42b of the first resistor 42 is coupled to the first end 43a of the second resistor 43 to form a fifth node N5, the second end 43b of the second resistor 43 is grounded, and the reference voltage Vref is input to the fifth node N5. The third resistor 46 and the fourth resistor 47 are connected in series with each other and coupled to the first input 41a of the error amplifier 41 from a sixth node N6 therebetween. In this embodiment, the voltage at the first input terminal 41a is VA, the voltage at the second input terminal 41b is VB, and the fourth node N4 (i.e., VB) is used as an output terminal of the load compensation module 40, i.e., for outputting the load compensation signal.
With continued reference to fig. 3, in another embodiment of the present invention, the circuit schematic of the constant voltage control chip is further shown in fig. 3, which shows a detailed configuration of the constant voltage control chip 20, in this embodiment, the constant voltage control chip 20 further has a current detection terminal CS and a control terminal SEL, and the constant voltage control chip 20 further includes a logic controller 21, a driver 22, a power switch 23, a hysteresis comparator 24, a current detection unit 25, a Leading Edge Blanking (LEB) unit 26, a high voltage unit 27, an oscillator 28 and at least one protection unit, the protection unit may include an over-temperature protection unit 29 and an over-voltage and over-load protection unit 210, in addition, the constant voltage control chip 20 is further provided with the load compensation module 40, the load compensation module 40 includes a power supply terminal sampling module 40a and a regulation module, the regulation module includes an error amplifier 41 and a unit 40c, the power supply terminal 40a includes a first switch module 403a and a second switch module 40 b coupled to the first input terminal 41b and the error amplifier 41b, and the second switch module 40 b is coupled to the first input 41b and the error amplifier 41b is coupled to the first input 41b and the error amplifier 41b. Regarding the load compensation module 40 of the present embodiment, reference is made to the configuration of fig. 2, and other configurations may be used.
The logic controller 21 outputs control signals to the driver 22 to control the power switch 23, and in this embodiment, the power switch 23 is a metal oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field-Effect Transistor, MOSFET), but not limited thereto, the power switch 23 may also be one or more triodes. A first input 24a of the hysteresis comparator 24 is coupled between a power source VCC and the high voltage unit 27, a second input 24b of the hysteresis comparator 24 inputs a reference voltage Vref between 2.6V and 3V, and an output 24c of the hysteresis comparator 24 outputs to the logic controller 21. The current detecting unit 25 is coupled between the current detecting terminal CS and the logic controller 21, and coupled with the leading edge blanking unit 26, and the oscillator 28, the over-temperature protection unit 29, and the over-voltage and over-load protection unit 210 are coupled with the logic controller 21.
In this embodiment, the high voltage unit 27 is a Junction GATE FIELD-effect transistor (JFET), when the device is started, the JFET in the constant voltage control chip 20 is powered to the constant voltage control chip 20, and after the device is powered up, the second DC power DC2 gradually rises, and once the device rises to a threshold value, the Junction fet is turned off, and the second DC power DC2 is powered to the constant voltage control chip 20, in this embodiment, the threshold value is 2.9V. In addition, when overload or short-circuit protection is performed, the second direct current power DC2 is lowered and is switched to be supplied by the junction gate field effect transistor to the constant voltage control chip 20, at this time, the power supply voltage of the junction gate field effect transistor is smaller than the second direct current power DC2 in the normal state, and when overload or short-circuit protection is released, the second direct current power DC2 is raised and is switched to be supplied by the second direct current power DC2 to the constant voltage control chip 20, and the junction gate field effect transistor is turned off to supply power, so that standby power consumption is reduced.
As mentioned above, after the second DC power DC2 gradually rises above the threshold, the junction gate field effect transistor is turned off, and the freewheeling diode 31 is turned on, the second DC power DC2 charges the power supply capacitor 35, the power required for the operation of the constant voltage control chip 20 is provided by the second DC power DC2, and when the junction gate field effect transistor is turned on, the power required for the operation of the constant voltage control chip 20 is provided by the power supply capacitor 35. In the present invention, the constant voltage control chip 20 samples the divided voltage of the power supply terminal VCC, and adjusts the output voltage to be constant in cooperation with the current loop formed by the bootstrap diode 34, i.e. the second direct current power DC2 is constant. Furthermore, in the present invention, since the power supply terminal VCC is sampled, the sampled feedback signal is opposite to the ground terminal G of the constant voltage control chip 20, and thus the sampled feedback signal is the reference signal, without providing a sample-and-hold circuit, the constant voltage control chip 20 can directly and continuously receive the feedback signal sampled from the power supply terminal VCC.
In addition to regulating the second direct current power DC2 to be constant, since the present invention is applied to a low power consumption control circuit of an intelligent home appliance, particularly a load with a low voltage of less than 5V, a poor load regulation rate may cause a more negative effect than a load with a voltage of more than 5V. For example, a typical Microcontroller (MCU) requires a voltage of 3.3V, which breaks down if the input voltage exceeds 3.6V, and which shuts down if the input voltage is below 3.0V, so that it must remain between 3.0V and 3.6V throughout the full load range. To solve this problem, the present invention sets the load compensation module 40 to reduce the load adjustment rate.
For the description of the embodiment of fig. 1 and fig. 2, the current of the circuit of fig. 2 has the relationship that i2=i1+i0 (formula 1), I0 is a fixed current, and the voltage of the second DC power DC2 is Vout, where vout=k×va-vf1+vf2 (formula 2), where K is the amplification factor of the error amplifier, is a fixed value, VA is the input voltage of the first input terminal 41a, vf1 is the voltage drop of the freewheeling diode 31, and Vf2 is the voltage drop of the bootstrap diode 34. Vf1 changes with load current, vf1 increases when load current increases, vf2 is a fixed value, and when load current increases, the second direct current DC2 decreases, and the voltage of the power supply terminal VCC also decreases, so that the input voltage VA of the first input terminal 41a of the error amplifier 41 decreases, and the voltage Veao output by the output terminal 41c of the error amplifier 41 also decreases, and further, the current I1 output by the first voltage-controlled current source 44 increases. Since I0 is a constant current according to equation 1, I2 rises as I1 rises, and vref is constant according to equation 2, and since I2 increases, VB increases, and vb=va, VA also increases, and thus, a compensation function is provided for Vout to cancel the voltage drop of the flywheel diode 31, and the voltage Vout of the second DC power DC2 is made nearly constant.
Referring to fig. 4, a load adjustment rate change chart of an embodiment and a comparative example of the present invention is shown, wherein a line 4A is a change of the output voltage Vout at different output currents Iout when the load compensation module 40 is provided, and a line 4B is a change of the output voltage Vout at different output currents Iout when the load compensation module 40 is not provided. As is evident from fig. 4, the variation of the line 4A is smaller than that of the line 4B under the same output current Iout, and it is easy to say that the line 4A provided with the load compensation module 40 has a smaller variation of the output voltage Vout than that of the line 4B not provided with the load compensation module 40, and the line 4A shows a better load adjustment rate. If the load compensation module 40 is not provided, the output voltage Vout will be lower than 3V when the output current Iout continuously rises, resulting in the microcontroller being turned off, and after the load compensation module 40 is added, the output voltage Vout can be kept within the operating voltage range of the microcontroller even under the full load condition, besides the small variation of the output voltage Vout, so that the microcontroller can operate normally. For the present embodiment, the operating voltage range of the microcontroller is 3V to 3.6V. Referring to fig. 5, a standby power consumption comparison diagram of an embodiment of the present invention and a comparative example is shown, wherein a line 5A is the standby power consumption of the low power consumption control circuit of the present invention, and a line 5B is the standby power consumption of the conventional control circuit, and it is obvious that the standby power consumption of the low power consumption control circuit of the present invention in the full voltage range is less than 20mW, and compared with the maximum standby power consumption of 104mW in the conventional structure, the standby power consumption is reduced by 5 times. Referring to fig. 6, a circuit diagram of a comparative example IN fig. 5 is shown, the control circuit 90 includes a rectifying module 91, a chip 92, a first feedback resistor Rb1, a second feedback resistor Rb2, a capacitor 93, an inductor 94 and a diode 95, an alternating current (AC IN) is input into the circuit 90 and then a direct current (DC OUT) is output, fig. 6 is a structure of a conventional control circuit, a JFET IN the chip 92 is normally powered, two ends of the JFET are electrically connected with Drain and VJ respectively, wherein VJ is generally pinch-off voltage, so that a high voltage difference exists between two ends of the JFET, and therefore the efficiency is low, the power consumption is high, and it is difficult to meet the ultra-low standby power consumption requirement.
Referring to fig. 7, a circuit diagram of a low power consumption control circuit according to another embodiment of the present invention is shown, wherein the circuit according to fig. 1 further includes at least one feedback resistor, a first feedback resistor Rfb1 and a second feedback resistor Rfb2 as shown, wherein the feedback resistor is coupled between a feedback terminal FB of the constant voltage control chip 20 and the buck conversion module 30, and the voltage value of the second direct current power DC2 is adjusted by the arrangement of the feedback resistor and the variation of the resistance value thereof. In the present embodiment, the voltage value of the second direct current power DC2 ranges from 2.5V to 5V. Referring to fig. 8A and 8B, the low power control circuit according to still another embodiment of the present invention further includes a detection resistor Rs coupled between the first node N1 and the current detection terminal CS, and the configuration of the first switch 401a, the second switch 402a and the resistor in the power supply sampling module 40a of the constant voltage control chip 20 of fig. 3 allows the control terminal SEL of the constant voltage control chip 20 to be selectively coupled to the power supply terminal VCC or the ground terminal G to adjust the second direct current power DC2, wherein the second direct current power DC2 is 3.3V when the control terminal SEL is coupled to the power supply terminal VCC, and the second direct current power DC2 is 5V when the control terminal SEL is coupled to the ground terminal G. In the present invention, to adjust the voltage value of the second DC power DC2, the feedback resistor may be directly disposed in the constant voltage control chip 20, so that the first feedback resistor Rfb1, the second feedback resistor Rfb2 and the feedback terminal FB are not required to be disposed, which is beneficial to reducing the component cost of the peripheral circuit of the chip.
Referring to fig. 9, a smart home system 100 is disclosed, which includes a main driving circuit module 200, an electric appliance module 300, a smart module 400 and a control circuit, wherein the main driving module 300 converts an ac power Vac into a main driving DC power, the main driving DC power is inputted into the electric appliance module 300 to supply the power required by the operation, the control circuit is used for outputting the second DC power DC2 according to the ac power Vac, the second DC power DC2 is inputted into the smart module 400 to supply the power required by the operation, and the smart module 400 can be a wireless signal receiver or a sensor.
In summary, the second dc power output by the buck conversion module is directly used as the power supply source of the constant voltage control chip instead of the JFET, so the problem of high standby power consumption is solved; meanwhile, the load compensation module is arranged on the constant voltage control chip, and the load compensation module samples the voltage of the power supply end, namely, the voltage of the power supply end is used as a feedback signal to achieve constant voltage regulation. In general, the invention is suitable for ultra low standby power consumption applications with output voltages below 5V.
Claims (19)
1. A low power consumption control circuit for an intelligent home appliance, comprising:
the rectification module receives alternating current and outputs first direct current power;
The constant voltage control chip comprises a drain terminal, a grounding terminal and a power supply terminal, wherein the drain terminal is coupled with the rectifying module;
A buck conversion module coupled to the rectifying module, the power end of the constant voltage control chip and the ground end, the buck conversion module receiving the first DC power and outputting a second DC power to an external load after buck conversion and supplying power to the constant voltage control chip via the power end, and the constant voltage control chip being enabled to sample the power end as a feedback signal to regulate the second DC power, and
The load compensation module is electrically connected with the power supply end and provides a compensation voltage to the power supply end so as to improve a load adjustment rate generated based on an external load.
2. The control circuit of claim 1, wherein the buck conversion module includes a freewheeling diode, an output capacitor coupled in parallel with the freewheeling diode, and an inductor coupled between the freewheeling diode and the output capacitor.
3. The control circuit of claim 2, wherein a cathode of the freewheeling diode is coupled to one end of the inductor and forms a first node, an anode of the freewheeling diode is coupled to the output capacitor, the other end of the inductor is coupled to the output capacitor to form a second node, the first node is coupled to the ground, and the second node is coupled to the power supply terminal of the constant voltage control chip.
4. The control circuit of claim 3, wherein the buck conversion module further comprises a bootstrap diode and a supply capacitor coupled to the bootstrap diode, the bootstrap diode including an anode coupled to the second node and a cathode forming a third node with the supply capacitor.
5. The control circuit of claim 3, wherein the constant voltage control chip further comprises a current detection terminal coupled to the first node.
6. The control circuit of claim 5, wherein a sense resistor is coupled between the current sense terminal and the first node.
7. The control circuit of claim 1, wherein the constant voltage control chip further comprises a feedback terminal coupled to the buck converter module and at least one feedback resistor for regulating the second dc power.
8. The control circuit of claim 1, wherein the constant voltage control chip further comprises a control terminal selectively coupled to the power supply terminal or the ground terminal for adjusting the second dc power.
9. The control circuit of claim 1, wherein the load compensation module comprises a power supply sampling module and a regulation module, the power supply sampling module is coupled with the power supply of the constant voltage control chip to output a power supply sampling signal to the regulation module, the regulation module receives a reference signal and the power supply sampling signal to output a load compensation signal coupled with the power supply.
10. The control circuit of claim 9, wherein the regulation module comprises an error amplifier and a regulation unit, a first input terminal of the error amplifier is coupled to the power supply terminal sampling module, an output terminal of the error amplifier is coupled to the regulation unit, and the regulation unit receives the reference signal and feeds back the load compensation signal to the second input terminal of the error amplifier.
11. The control circuit of claim 10, wherein the regulation unit comprises:
A first resistor, a first end of which is coupled to the second input end of the error amplifier and forms a fourth node;
a second resistor, a first end of which is coupled to a second end of the first resistor and forms a fifth node for inputting a reference voltage;
a first voltage-controlled current source including an input terminal coupled to the output terminal of the error amplifier, a control terminal coupled to the fifth node, and an output terminal coupled to a second terminal of the second resistor
A second voltage-controlled current source coupled between the power supply terminal and the second input terminal of the error amplifier.
12. The control circuit of claim 10, wherein the power supply side sampling signal comprises:
A third resistor coupled between the first input terminal and the power supply terminal of the error amplifier, and
And the fourth resistor is coupled with one end of the third resistor and forms a sixth node, and the other end of the fourth resistor is grounded.
13. The control circuit of claim 1 wherein the constant voltage control chip further comprises a selection terminal that selects the different second dc power outputs.
14. The control circuit of claim 13, wherein the select terminal is coupled to the load compensation module.
15. The control circuit of claim 1, wherein the constant voltage control chip further comprises:
A logic controller;
A driver coupled to the logic controller;
A power switch coupled to the driver, and
The comparator is provided with a first input end coupled to the load compensation module, a second input end for inputting a first reference voltage and an output end coupled to the logic controller.
16. The control circuit of claim 1, wherein the voltage of the second dc power is between 2.5V and 5V.
17. An intelligent home appliance system, comprising:
A main driving circuit module, which converts an alternating current into a main driving direct current power;
an electric appliance module coupled to the main driving circuit module and inputting the main driving DC power;
a control circuit according to any one of claims 1 to 16, which outputs the second DC power based on the AC power, and
And the intelligent module works by utilizing the second direct-current power.
18. The intelligent home appliance system of claim 17, wherein the intelligent module is a wireless signal receiver or a sensor.
19. The intelligent home appliance system according to claim 18, wherein the voltage value of the second dc power is between 2.5V and 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110429701A (en) * | 2019-09-11 | 2019-11-08 | 芯好半导体(成都)有限公司 | A kind of linear energy recovery circuit, recovery method and electric device |
| CN111082675A (en) * | 2019-12-31 | 2020-04-28 | 上海晶丰明源半导体股份有限公司 | Low-power-consumption power conversion circuit for control panel |
| CN111049384A (en) * | 2019-12-31 | 2020-04-21 | 上海晶丰明源半导体股份有限公司 | Low-power-consumption power conversion circuit for control panel |
| CN111555643B (en) * | 2020-06-05 | 2024-02-27 | 上海晶丰明源半导体股份有限公司 | Switching power supply controller, switching power supply system and switching power supply system power supply method |
| CN120185345B (en) * | 2025-05-22 | 2025-07-18 | 无锡硅动力微电子股份有限公司 | A control circuit for reducing standby power consumption and improving power supply load regulation rate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765274A (en) * | 2010-01-29 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED lamp and drive circuit |
| CN102255526A (en) * | 2011-06-23 | 2011-11-23 | 深圳市富满电子有限公司南山分公司 | AC-DC power supply conversion chip and power switching circuit |
| CN105138062A (en) * | 2014-05-29 | 2015-12-09 | 展讯通信（上海）有限公司 | System improving load regulation rate of low-pressure-difference linear voltage regulator |
| CN210199529U (en) * | 2019-06-06 | 2020-03-27 | 上海晶丰明源半导体股份有限公司 | Low-power-consumption control circuit for intelligent household appliance and intelligent household appliance system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426370B (en) * | 2013-09-10 | 2017-11-10 | 深圳市必易微电子有限公司 | Power supply adaptor and its adaptation control circuit and Adaptive Control Method |
-
2019
- 2019-06-06 CN CN201910492131.9A patent/CN110134026B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765274A (en) * | 2010-01-29 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED lamp and drive circuit |
| CN102255526A (en) * | 2011-06-23 | 2011-11-23 | 深圳市富满电子有限公司南山分公司 | AC-DC power supply conversion chip and power switching circuit |
| CN105138062A (en) * | 2014-05-29 | 2015-12-09 | 展讯通信（上海）有限公司 | System improving load regulation rate of low-pressure-difference linear voltage regulator |
| CN210199529U (en) * | 2019-06-06 | 2020-03-27 | 上海晶丰明源半导体股份有限公司 | Low-power-consumption control circuit for intelligent household appliance and intelligent household appliance system |
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