CN220584597U - Output voltage regulating circuit, power supply equipment and intelligent closestool - Google Patents
Output voltage regulating circuit, power supply equipment and intelligent closestool Download PDFInfo
- Publication number
- CN220584597U CN220584597U CN202321831629.1U CN202321831629U CN220584597U CN 220584597 U CN220584597 U CN 220584597U CN 202321831629 U CN202321831629 U CN 202321831629U CN 220584597 U CN220584597 U CN 220584597U
- Authority
- CN
- China
- Prior art keywords
- circuit
- module
- output voltage
- voltage
- resistor
- 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.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims abstract description 46
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 238000002955 isolation Methods 0.000 claims description 32
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to an output voltage regulating circuit, power supply equipment and an intelligent closestool, wherein the circuit comprises a resistor matching circuit, a feedback circuit and a control circuit, the control circuit can generate a corresponding control signal according to the power supply voltage requirement of a load, the resistor matching circuit generates a corresponding equivalent resistor between the second end and the third end of the resistor matching circuit according to the control signal so as to generate an equivalent voltage signal at the first end of the feedback circuit, the feedback circuit generates a feedback signal according to the equivalent voltage signal, the feedback signal is transmitted to the feedback end of a switch circuit, and the switch circuit controls the coupling of a primary winding and a secondary winding according to the feedback signal so as to regulate the output voltage. Therefore, the output voltage regulating circuit can meet the power supply requirement of a load, further improve the working efficiency of the load, and meet the power supply requirements of different loads, and has a wider application range.
Description
Technical Field
The utility model relates to the field of voltage regulation, in particular to an output voltage regulating circuit, power supply equipment and an intelligent closestool.
Background
With rapid development of technology, intelligent toilet products are becoming more popular. The power supply voltage required by intelligent toilets of different brands and models may be different, but the current toilet power supply can only output a single and fixed power supply voltage, and cannot adjust the power supply voltage according to the power supply voltage requirement of a load, so that the power supply requirements of different loads cannot be compatible.
Disclosure of Invention
The embodiment of the utility model aims to provide an output voltage regulating circuit, power supply equipment and an intelligent closestool, which can regulate the output voltage of the power supply equipment according to the power supply voltage of a load, meet the power supply requirement of the load, further improve the working efficiency of the load, and can also be compatible with the power supply requirements of different loads, and the application range is wider.
In order to solve the technical problems, the embodiment of the utility model provides the following technical scheme:
in a first aspect, an embodiment of the present utility model provides an output voltage regulating circuit applied to a power supply apparatus, the power supply apparatus including a flyback transformer and a switching circuit, the flyback transformer including a primary winding and a secondary winding, the switching circuit being configured to control coupling of the primary winding and the secondary winding so that the flyback transformer converts a dc power supply into an output voltage to supply power to a load, the output voltage regulating circuit comprising: the resistor matching circuit, the feedback circuit and the control circuit;
one end of the control circuit is connected with the load, the other end of the control circuit is connected with the first end of the resistance matching circuit, and the control circuit is used for generating the control signal according to the power supply voltage of the load;
the first end of the resistance matching circuit is used for being connected with a control signal of the control circuit, the second end of the resistance matching circuit is connected with the first end of the feedback circuit, the third end of the resistance matching circuit is grounded, and the resistance matching circuit is used for generating a corresponding equivalent resistance between the second end and the third end of the resistance matching circuit according to the control signal so as to generate an equivalent voltage signal at the first end of the feedback circuit;
the second end of the feedback circuit is grounded, the third end of the feedback circuit is used for accessing the output voltage, the fourth end of the feedback circuit is grounded, the fifth end of the feedback circuit is connected with the feedback end of the switching circuit, and the feedback circuit is used for generating a feedback signal according to the equivalent voltage signal so that the switching circuit controls the coupling of the primary winding and the secondary winding according to the feedback signal and then adjusts the output voltage.
In some embodiments, the feedback circuit includes a voltage dividing module, a comparing module, and an optocoupler isolation module;
the first end of the voltage dividing module is used for accessing the output voltage, the second end of the voltage dividing module is respectively connected with the first end of the comparison module and the second end of the resistance matching circuit, the third end of the voltage dividing module is grounded, and the voltage dividing module is used for dividing the output voltage so as to generate a voltage dividing signal at the second end of the voltage dividing module;
the second end of the comparison module is grounded, the third end of the comparison module is connected with the first end of the optocoupler isolation module, and the comparison module is used for comparing the divided voltage signal, the equivalent voltage signal and the reference voltage to generate a comparison signal;
the second end of the optical coupling isolation module is used for accessing the output voltage, the third end of the optical coupling isolation module is grounded, the fourth end of the optical coupling isolation module is connected with the feedback end of the switching circuit, and the optical coupling isolation module is used for generating the feedback signal according to the comparison signal and also used for isolating the primary winding from the secondary winding.
In some embodiments, the comparison module comprises a three terminal voltage regulator;
the reference end of the three-terminal voltage stabilizer is respectively connected with the second end of the voltage dividing module and the second end of the resistance matching circuit, the anode of the three-terminal voltage stabilizer is grounded, and the cathode of the three-terminal voltage stabilizer is connected with the first end of the optocoupler isolation module.
In some embodiments, the optocoupler isolation module includes an optocoupler, a first resistor, and a second resistor;
one end of the first resistor is used for being connected with the output voltage, the other end of the first resistor is respectively connected with the anode of the diode of the optocoupler and one end of the second resistor, and the cathode of the diode of the optocoupler and the other end of the second resistor are commonly connected with the third end of the comparison module;
and the collector electrode of the triode of the optocoupler is connected with the feedback end of the switching circuit, and the emitter electrode of the triode of the optocoupler is grounded.
In some embodiments, the voltage dividing module includes a third resistor and a fourth resistor;
one end of the third resistor is used for being connected with the output voltage, the other end of the third resistor is connected with one end of the fourth resistor and the first end of the comparison module respectively, and the other end of the fourth resistor is grounded.
In some embodiments, the resistance matching circuit includes a filter module and a resistance module;
the first end of the filtering module is used for accessing the control signal, the second end of the filtering module is grounded, the third end of the filtering module is connected with one end of the resistance module, and the other end of the resistance module is connected with the first end of the feedback circuit;
the filtering module is used for filtering the control signal, and the resistance module is used for generating the equivalent resistance according to the control signal so as to generate an equivalent voltage signal at the first end of the feedback circuit.
In some embodiments, the resistance module includes a fifth resistance, and the filtering module includes a sixth resistance, a seventh resistance, a first capacitance, and a second capacitance;
one end of the fifth resistor is connected with the second end of the voltage dividing module and the first end of the comparison module respectively, the other end of the fifth resistor is connected with one end of the sixth resistor and one end of the first capacitor respectively, the other end of the sixth resistor is connected with one end of the seventh resistor and one end of the second capacitor respectively, the other end of the first capacitor and the other end of the second capacitor are grounded together, and the other end of the seventh resistor is used for accessing the control signal.
In some embodiments, the output voltage regulation circuit further comprises a compensation circuit;
one end of the compensation circuit is respectively connected with the second end of the voltage dividing module and the first end of the comparison module, the other end of the compensation circuit is respectively connected with the third end of the comparison module and the first end of the optocoupler isolation module, and the compensation circuit is used for compensating the output voltage so as to stabilize the output voltage.
In a second aspect, embodiments of the present utility model provide a power supply apparatus comprising a flyback transformer, a switching circuit, and an output voltage regulating circuit as described above;
the flyback transformer comprises a primary winding and a secondary winding, and is used for converting a direct-current power supply into an output voltage so as to supply power to a load;
the switching circuit is connected in series in a working loop of the primary winding and is used for controlling the coupling of the primary winding and the secondary winding;
the first end of the output voltage regulating circuit is used for accessing the power supply voltage of the load, the second end of the output voltage regulating circuit is connected with the feedback end of the switching circuit, and the output voltage regulating circuit is used for generating a feedback signal according to the power supply voltage of the load so that the switching circuit can regulate the output voltage.
In a third aspect, embodiments of the present utility model provide a smart toilet comprising a power supply device as described above and a load.
In various embodiments of the present utility model, the output voltage adjusting circuit includes a resistor matching circuit, a feedback circuit, and a control circuit, where one end of the control circuit is connected to the load, the other end of the control circuit is connected to a first end of the resistor matching circuit, a second end of the resistor matching circuit is connected to a first end of the feedback circuit, a third end of the resistor matching circuit is grounded, a second end of the feedback circuit is grounded, a third end of the feedback circuit is used to access the output voltage, a fourth end of the feedback circuit is grounded, and a fifth end of the feedback circuit is connected to a feedback end of the switching circuit. The resistance matching circuit generates a corresponding equivalent resistance between the second end and the third end of the resistance matching circuit according to the control signal so as to generate an equivalent voltage signal at the first end of the feedback circuit, the feedback circuit generates a feedback signal according to the equivalent voltage signal, the feedback signal is transmitted to the feedback end of the switching circuit, and the switching circuit controls the coupling of the primary winding and the secondary winding according to the feedback signal so as to regulate the output voltage.
The output voltage regulating circuit can feed back the power supply voltage demand to the feedback end of the switching circuit according to the power supply voltage demand of the load, so that the switching circuit can regulate the output voltage of the power supply equipment according to the power supply voltage demand, the output voltage regulating circuit can meet the power supply demand of the load, the work efficiency of the load is improved, the output voltage regulating circuit can meet the power supply demands of different loads, and the application range is wider.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a schematic structural view of a smart toilet according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a power supply device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of an output voltage adjusting circuit according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of an output voltage adjusting circuit according to an embodiment of the present utility model;
fig. 5 is a schematic circuit diagram of an output voltage adjusting circuit according to an embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an intelligent toilet according to an embodiment of the utility model. As shown in fig. 1, the smart toilet includes a power supply apparatus 100 and a load 200.
The power supply 300 is connected to the power supply device 100 to provide power to the power supply device 100, the power supply 300 may be a dc power supply or an ac power supply, and when the power supply 300 is an ac power supply, the dc power supply is provided to the power supply device 100 after rectifying and filtering, and the power supply 300 may be a power supply circuit formed by any suitable discrete component, for example, in some embodiments, the power supply 300 is a power supply circuit formed by a filter circuit, a rectifying circuit, and a voltage stabilizing circuit, and, for example, in some embodiments, the power supply 300 is an integrated power supply chip.
The power supply device 100 processes the power supplied by the power supply 300 to obtain a secondary low-voltage signal, where the voltage of the secondary low-voltage signal is an output voltage, and the secondary low-voltage signal may be a low-voltage pulse wave or a low-voltage wave with another shape.
The power supply apparatus 100 is connected to the load 200, supplies an output voltage to the load 200, and the load 200 implements corresponding load 200 control logic according to driving of the secondary low voltage signal.
As shown in fig. 2, the power supply apparatus 100 includes a flyback transformer 10, a switching circuit 20, and an output voltage regulating circuit 30, the flyback transformer 10 includes a primary winding and a secondary winding, the switching circuit 20 is connected in series in an operation loop of the primary winding, the switching circuit 20 controls current coupling between the primary winding and the secondary winding, a power supply 300 converts an output voltage of a secondary low voltage signal through coupling of the primary winding and the secondary winding, and the output voltage acts on a load 200 to supply power to the load 200.
The traditional power supply equipment can only output single and fixed output voltage and cannot meet the power supply requirements of different loads, so that the working efficiency of the loads is low. Therefore, the present utility model provides an output voltage adjusting circuit 30, wherein a first end of the output voltage adjusting circuit 30 is used for accessing a power supply voltage of a load, a second end of the output voltage adjusting circuit 30 is connected with a feedback end of a switch circuit 20, the output voltage adjusting circuit 30 generates a feedback signal according to the power supply voltage of the load, and the switch circuit 20 controls current coupling between a primary winding and a secondary winding according to the feedback signal, thereby adjusting the output voltage to meet the power supply voltage requirement of the load, and further improving the working efficiency of the load.
Referring to fig. 3, fig. 3 is a schematic diagram of an output voltage adjusting circuit according to an embodiment of the utility model, and as shown in fig. 3, the output voltage adjusting circuit 30 includes a resistor matching circuit 301, a feedback circuit 302 and a control circuit 303.
One end of the control circuit 303 is connected with the load 300, the other end of the control circuit 303 is connected with the first end of the resistance matching circuit 301, the second end of the resistance matching circuit 301 is connected with the first end of the feedback circuit 302, the third end of the resistance matching circuit 301 is grounded, the second end of the feedback circuit 302 is grounded, the third end of the feedback circuit 302 is used for accessing output voltage, the fourth end of the feedback circuit 302 is grounded, and the fifth end of the feedback circuit 302 is connected with the feedback end of the switch circuit 20.
The control circuit 303 generates a control signal according to the supply voltage of the load 300, the resistance matching circuit 301 generates a corresponding equivalent resistance between the second end and the third end of the resistance matching circuit 301 according to the control signal, so as to generate an equivalent voltage signal at the first end of the feedback circuit 302, the feedback circuit 302 generates a feedback signal according to the equivalent voltage signal, the feedback signal is transmitted to the feedback end of the switch circuit 20, and the switch circuit 20 controls the coupling of the primary winding and the secondary winding according to the feedback signal, and then adjusts the output voltage.
The control circuit 303 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a single chip, ARM (Acorn RISC Machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. Also, the control circuit 303 may be any conventional processor, controller, microcontroller, or state machine. The control circuit 303 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP, and/or any other such configuration.
The output voltage adjusting circuit 30 can feed back the supply voltage requirement to the feedback end of the switch circuit 20 according to the supply voltage requirement of the load 300, so that the switch circuit 20 can adjust the output voltage of the power supply device according to the supply voltage requirement, and therefore, the output voltage adjusting circuit 30 can meet the supply requirement of the load 300, and further improve the working efficiency of the load 300, and the output voltage adjusting circuit 30 can meet the supply requirements of different loads 300, so that the application range is wider.
Referring to fig. 4, fig. 4 is a schematic diagram of an output voltage adjusting circuit according to an embodiment of the utility model. As shown in fig. 4, the feedback circuit 302 includes a voltage dividing module 3021, a comparing module 3022, and an optocoupler isolation module 3023.
The first end of the voltage dividing module 3021 is used for accessing the output voltage, the second end of the voltage dividing module 3021 is connected to the first end of the comparison module 3022 and the second end of the resistance matching circuit 301, and the third end of the voltage dividing module 3021 is grounded.
The second end of the comparison module 3022 is grounded, and the third end of the comparison module 3022 is connected to the first end of the optocoupler isolation module 3023. The second end of the optocoupler isolation module 3023 is used for accessing the output voltage, the third end of the optocoupler isolation module 3023 is grounded, and the fourth end of the optocoupler isolation module 3023 is connected to the feedback end of the switch circuit 20.
The voltage dividing module 3021 divides the output voltage, and generates a divided voltage signal at the second end of the voltage dividing module 3021, and at the same time, the divided voltage signal acts on the first end of the comparison module 3022. The first terminal of the comparison module 3022 is a reference terminal, and includes a reference voltage therein, which may be set as required, and in this embodiment is 2.5V.
If the load 300 has no power supply requirement, the comparison module 3022 compares the divided voltage signal at the first end with the internal reference voltage, and the generated comparison signal is at the first level. When the comparison module 3022 is stable, the voltage of the divided signal is close to the reference voltage.
If the load 300 has a power supply requirement, the divided voltage signal and the first equivalent voltage signal act on the first end of the comparison module 3022 together, so that the voltage at the first end of the comparison module 3022 is higher than the reference voltage, the comparison signal generated by the comparison module 3022 is at a second level, the level of the comparison signal changes, and the second level is smaller than the first level.
The comparison signal acts on the first end of the optocoupler isolation module 3023, and the optocoupler isolation module 3023 generates a feedback signal according to the comparison signal and feeds the feedback signal back to the feedback end of the switching circuit 20. When the load 300 has no power supply requirement, the comparison signal is a first level, the optocoupler isolation module 3023 generates a feedback signal, when the load 300 has the power supply requirement, the comparison signal is a second level, the second level is smaller than the first level, the voltage drop between the second end and the first end of the optocoupler isolation module 3023 can be changed, the feedback signal is further caused to be changed, the switching circuit 20 receives the changed feedback signal, and then outputs a driving signal with a corresponding duty ratio according to the changed feedback signal to adjust the output voltage, so that the output voltage meets the power supply requirement of the load 300.
Isolation is required between the primary (primary winding) and secondary (secondary winding) windings of flyback transformer 10, and an optocoupler isolation module 3023 is used in this embodiment to isolate the primary winding from the secondary winding.
In some embodiments, as shown in fig. 4, the resistance matching circuit 301 includes a filter module 3011 and a resistance module 3012. The first end of the filtering module 3011 is used for accessing the control signal, the second end of the filtering module 3011 is grounded, the third end of the filtering module 3011 is connected to one end of the resistor module 3012, and the other end of the resistor module 3012 is connected to the first end of the feedback circuit 302.
The filtering module 3011 may filter the control signal, the filtered control signal acting on a first end of the resistive module 3012, the resistive module 3012 generating an equivalent resistance based on the filtered control signal to generate an equivalent voltage signal at the first end of the feedback circuit 302.
The duty ratio of the control signal is controlled, so that the resistance value of the equivalent resistor can be changed, and the voltage of the equivalent voltage signal can be changed. For example: if the control signal is at 50% duty cycle and the high level voltage is 5V, the filtered control signal corresponds to a voltage signal of 2.5V, the voltage signal of 2.5V acts on the first end of the resistor module 3012, and the resistor module 3012 forms an equivalent voltage signal according to the voltage difference between the voltage at the second end and the voltage at the first end. If the control signal is 80% duty cycle and the high level voltage is 5V, the filtered control signal corresponds to a voltage signal of 4V, the voltage signal of 4V acts on the first end of the resistor module 3012, and the resistor module 3012 forms an equivalent voltage signal according to the voltage difference between the voltage of the second end and the voltage of the first end.
Therefore, the control signals with different duty ratios form different equivalent voltage signals, and the equivalent voltage signals act on the feedback circuit 302, so that the feedback signals generated by the feedback circuit 302 are different, and the output voltages of the control outputs of the switch circuit 20 are also different. The duty ratio of the control signal can be generated according to the power supply voltage of the load 300, so that the switching circuit 20 controls to output a corresponding output voltage to meet the power supply requirement of the load 300.
In some embodiments, the output voltage regulation circuit 30 further includes a compensation circuit 304. One end of the compensation circuit 304 is connected to the second end of the voltage dividing module 3021 and the first end of the comparison module 3022, and the other end of the compensation circuit 304 is connected to the third end of the comparison module 3022 and the first end of the optocoupler isolation module 3023.
The compensation circuit 304 may be used to compensate the output voltage for loop compensation to stabilize the output voltage and maintain loop stability.
Referring to fig. 5, fig. 5 is a schematic circuit diagram of an output voltage adjusting circuit according to an embodiment of the present utility model, as shown in fig. 5, a comparing module 3022 includes a three-terminal voltage regulator U1, a reference terminal of the three-terminal voltage regulator U1 is respectively connected to a second terminal of the voltage dividing module 3021 and a second terminal of the resistance matching circuit 301, an anode of the three-terminal voltage regulator U1 is grounded, and a cathode of the three-terminal voltage regulator U1 is connected to a first terminal of the optocoupler isolation module 3023. The three-terminal voltage regulator U1 is model TL431.
The optocoupler isolation module 3023 includes an optocoupler P1, a first resistor R1, and a second resistor R2. One end of the first resistor R1 is used for being connected to the output voltage VCC, the other end of the first resistor R1 is connected to the anode of the diode of the optocoupler P1 and one end of the second resistor R2, the cathode of the diode of the optocoupler P1 and the other end of the second resistor R2 are commonly connected to the third end of the comparison module 3022, and specifically, the cathode of the diode of the optocoupler P1 and the other end of the second resistor R2 are commonly connected to the cathode of the three-end voltage regulator U1.
The collector of the triode of the optocoupler P1 is connected with the feedback end of the switch circuit 20, and the emitter of the triode of the optocoupler P1 is grounded.
The voltage dividing module 3021 includes a third resistor R3 and a fourth resistor R4. One end of the third resistor R3 is used for being connected to the output voltage VCC, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the first end of the comparison module 3022, specifically, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the reference end of the three-terminal voltage regulator U1, and the other end of the fourth resistor R4 is grounded.
The resistor module 3012 includes a fifth resistor R5, and the filter module 3011 includes a sixth resistor R6, a seventh resistor R7, a first capacitor C1, and a second capacitor C2.
One end of the fifth resistor R5 is connected to the second end of the voltage dividing module 3021 and the first end of the comparing module 3022, specifically, one end of the fifth resistor R5 is connected to a common connection point of the third resistor R3 and the fourth resistor R4 and a reference end of the three-terminal voltage regulator U1, the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6 and one end of the first capacitor C1, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and one end of the second capacitor C2, the other end of the first capacitor C1 is grounded together with the other end of the second capacitor C2, and the other end of the seventh resistor R7 is used for accessing the control signal.
The compensation circuit 304 includes a third capacitor C3 and an eighth resistor R8, wherein one end of the third capacitor C3 is connected to the cathode of the three-terminal voltage regulator U1 and the cathode of the diode of the optocoupler P1, and the other end of the third capacitor C3 is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 is connected to the common connection point of the third resistor R3 and the fourth resistor R4.
The control circuit 303 sends a control signal to the resistance matching circuit 301 via the mcu_ctr pin, and the feedback signal is transferred to the COMP pin of the switching circuit 20. In this case, the switching circuit 20 may be a switching power supply chip, and the control circuit 303 may be a controller.
The operating principle of the output voltage regulating circuit 30 can be described as follows in connection with fig. 5:
when the load 300 stably supplies power, the output voltage VCC passes through the voltage division of the third resistor R3 and the fourth resistor R4 to generate a voltage division signal, the voltage division signal acts on the reference terminal of the three-terminal voltage regulator U1, the voltage of the voltage division signal is compared with the reference voltage, the cathode of the three-terminal voltage regulator U1 outputs a comparison signal of a first level, the triode of the optocoupler P1 generates a feedback signal at the collector thereof, and the switching circuit 20 controls the flyback transformer 10 to stably output the output voltage VCC;
when the power supply voltage of the load 300 changes or the load 300 is replaced, and the power supply voltage of the replaced load 300 is different from that of the original load 300, the control circuit 303 obtains a new power supply voltage, generates a first control signal according to the new power supply voltage, and the duty ratio of the first control signal corresponds to the new power supply voltage;
the first control signal is subjected to two-stage filtering of a sixth resistor R6, a first capacitor C1, a seventh resistor R7 and a second capacitor C2 to form a corresponding equivalent resistor which is connected with a fourth resistor R4 in parallel, and an equivalent voltage signal is formed at the reference end of the three-terminal voltage regulator U1;
the equivalent voltage signal causes the voltage at the reference end of the three-terminal voltage regulator U1 to change, and then causes the voltage at the cathode of the three-terminal voltage regulator U1 to change, the cathode outputs a comparison signal of a second level, the voltage at the cathode of the three-terminal voltage regulator U1 changes, the current flowing through the first resistor R1 and the diode of the optocoupler P1 changes, and then the current of the triode of the optocoupler P1 changes simultaneously, the voltage at the collector pin COMP pin of the optocoupler P1 changes, the changed signal is transmitted to the feedback end of the switching circuit 20, and the switching signal of the switching circuit 20 changes, so that the output voltage VCC changes, and the output voltage VCC is regulated to reach a new supply voltage;
if the load 300 is standby or not operating, the output voltage VCC adjusting circuit 30 can reduce the output voltage VCC by the control signal to reduce the power consumption.
Therefore, the output voltage adjusting circuit can adjust the output voltage according to the power supply voltage of the load, so that the output voltage adjusting circuit can meet the power supply requirement of the load, the working efficiency of the load is improved, and the output voltage adjusting circuit can be compatible with the power supply requirements of different loads, and has a wider application range.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the utility model, the steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An output voltage regulating circuit for use in a power supply apparatus, the power supply apparatus comprising a flyback transformer and a switching circuit, the flyback transformer comprising a primary winding and a secondary winding, the switching circuit being configured to control coupling of the primary winding and the secondary winding such that the flyback transformer converts a dc power supply to an output voltage to power a load, the output voltage regulating circuit comprising: the resistor matching circuit, the feedback circuit and the control circuit;
one end of the control circuit is connected with the load, the other end of the control circuit is connected with the first end of the resistance matching circuit, and the control circuit is used for generating a control signal according to the power supply voltage of the load;
the first end of the resistance matching circuit is used for being connected with a control signal of the control circuit, the second end of the resistance matching circuit is connected with the first end of the feedback circuit, the third end of the resistance matching circuit is grounded, and the resistance matching circuit is used for generating a corresponding equivalent resistance between the second end and the third end of the resistance matching circuit according to the control signal so as to generate an equivalent voltage signal at the first end of the feedback circuit;
the second end of the feedback circuit is grounded, the third end of the feedback circuit is used for accessing the output voltage, the fourth end of the feedback circuit is grounded, the fifth end of the feedback circuit is connected with the feedback end of the switching circuit, and the feedback circuit is used for generating a feedback signal according to the equivalent voltage signal so that the switching circuit controls the coupling of the primary winding and the secondary winding according to the feedback signal and then adjusts the output voltage.
2. The output voltage regulation circuit of claim 1 wherein the feedback circuit comprises a voltage divider module, a comparison module, and an optocoupler isolation module;
the first end of the voltage dividing module is used for accessing the output voltage, the second end of the voltage dividing module is respectively connected with the first end of the comparison module and the second end of the resistance matching circuit, the third end of the voltage dividing module is grounded, and the voltage dividing module is used for dividing the output voltage so as to generate a voltage dividing signal at the second end of the voltage dividing module;
the second end of the comparison module is grounded, the third end of the comparison module is connected with the first end of the optocoupler isolation module, and the comparison module is used for comparing the divided voltage signal, the equivalent voltage signal and the reference voltage to generate a comparison signal;
the second end of the optical coupling isolation module is used for accessing the output voltage, the third end of the optical coupling isolation module is grounded, the fourth end of the optical coupling isolation module is connected with the feedback end of the switching circuit, and the optical coupling isolation module is used for generating the feedback signal according to the comparison signal and also used for isolating the primary winding from the secondary winding.
3. The output voltage regulation circuit of claim 2 wherein the comparison module comprises a three terminal regulator;
the reference end of the three-terminal voltage stabilizer is respectively connected with the second end of the voltage dividing module and the second end of the resistance matching circuit, the anode of the three-terminal voltage stabilizer is grounded, and the cathode of the three-terminal voltage stabilizer is connected with the first end of the optocoupler isolation module.
4. The output voltage regulation circuit of claim 2 wherein the optocoupler isolation module comprises an optocoupler, a first resistor, and a second resistor;
one end of the first resistor is used for being connected with the output voltage, the other end of the first resistor is respectively connected with the anode of the diode of the optocoupler and one end of the second resistor, and the cathode of the diode of the optocoupler and the other end of the second resistor are commonly connected with the third end of the comparison module;
and the collector electrode of the triode of the optocoupler is connected with the feedback end of the switching circuit, and the emitter electrode of the triode of the optocoupler is grounded.
5. The output voltage regulation circuit of claim 2 wherein the voltage dividing module includes a third resistor and a fourth resistor;
one end of the third resistor is used for being connected with the output voltage, the other end of the third resistor is connected with one end of the fourth resistor and the first end of the comparison module respectively, and the other end of the fourth resistor is grounded.
6. The output voltage regulation circuit of claim 2 wherein the resistance matching circuit includes a filter module and a resistance module;
the first end of the filtering module is used for accessing the control signal, the second end of the filtering module is grounded, the third end of the filtering module is connected with one end of the resistance module, and the other end of the resistance module is connected with the first end of the feedback circuit;
the filtering module is used for filtering the control signal, and the resistance module is used for generating the equivalent resistance according to the control signal so as to generate an equivalent voltage signal at the first end of the feedback circuit.
7. The output voltage regulation circuit of claim 6 wherein the resistance module comprises a fifth resistance, and the filter module comprises a sixth resistance, a seventh resistance, a first capacitance, and a second capacitance;
one end of the fifth resistor is connected with the second end of the voltage dividing module and the first end of the comparison module respectively, the other end of the fifth resistor is connected with one end of the sixth resistor and one end of the first capacitor respectively, the other end of the sixth resistor is connected with one end of the seventh resistor and one end of the second capacitor respectively, the other end of the first capacitor and the other end of the second capacitor are grounded together, and the other end of the seventh resistor is used for accessing the control signal.
8. The output voltage regulation circuit of any one of claims 2-7, wherein the output voltage regulation circuit further comprises a compensation circuit;
one end of the compensation circuit is respectively connected with the second end of the voltage dividing module and the first end of the comparison module, the other end of the compensation circuit is respectively connected with the third end of the comparison module and the first end of the optocoupler isolation module, and the compensation circuit is used for compensating the output voltage so as to stabilize the output voltage.
9. A power supply apparatus comprising a flyback transformer, a switching circuit, and an output voltage regulating circuit according to any one of claims 1-8;
the flyback transformer comprises a primary winding and a secondary winding, and is used for converting a direct-current power supply into an output voltage so as to supply power to a load;
the switching circuit is connected in series in a working loop of the primary winding and is used for controlling the coupling of the primary winding and the secondary winding;
the first end of the output voltage regulating circuit is used for accessing the power supply voltage of the load, the second end of the output voltage regulating circuit is connected with the feedback end of the switching circuit, and the output voltage regulating circuit is used for generating a feedback signal according to the power supply voltage of the load so that the switching circuit can regulate the output voltage.
10. A smart toilet comprising the power supply apparatus of claim 9 and a load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321831629.1U CN220584597U (en) | 2023-07-12 | 2023-07-12 | Output voltage regulating circuit, power supply equipment and intelligent closestool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321831629.1U CN220584597U (en) | 2023-07-12 | 2023-07-12 | Output voltage regulating circuit, power supply equipment and intelligent closestool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220584597U true CN220584597U (en) | 2024-03-12 |
Family
ID=90121346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321831629.1U Active CN220584597U (en) | 2023-07-12 | 2023-07-12 | Output voltage regulating circuit, power supply equipment and intelligent closestool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220584597U (en) |
-
2023
- 2023-07-12 CN CN202321831629.1U patent/CN220584597U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6005781A (en) | Two switch off-line switching converter | |
| CN103078478B (en) | Controller for switching power supply and switching power supply | |
| US20060109039A1 (en) | Pulse width modulation device with a power saving mode controlled by an output voltage feedback hysteresis circuit | |
| CN100423431C (en) | Pulse width modulation device capable of automatically changing output frequency | |
| US11411499B2 (en) | Integrated circuit and power supply circuit | |
| WO2020081760A1 (en) | Bias power regulator circuit for isolated converters with a wide output voltage range | |
| EP1552596B1 (en) | Capacitively coupled power supply | |
| CN103747561A (en) | Load adjusting compensation switch power supply | |
| US20230283172A1 (en) | Resonant tank circuit, wide voltage input/output power supply, and electronic device | |
| CN218829627U (en) | Auxiliary power supply circuit and energy storage equipment | |
| CN108111031B (en) | Non-isolated single-chip AC/DC switch power supply control circuit | |
| CN220584597U (en) | Output voltage regulating circuit, power supply equipment and intelligent closestool | |
| CN217935460U (en) | Power supply circuit of flyback converter | |
| CN115313863B (en) | Circuit and method for regulating PFC and LLC topology output voltage based on output demand | |
| CN214586613U (en) | Linear voltage-stabilized power supply with low voltage drop | |
| CN111525822B (en) | Switching power supply controller, switching power supply system and switching power supply system power supply method | |
| CN100499340C (en) | Winding Voltage Sampling Control Power Converter | |
| CN111987912B (en) | Power supply circuit for switching output positive and negative voltages | |
| CN209805675U (en) | Logic voltage conversion circuit applied to T-CON board | |
| CN218158846U (en) | LLC automatic linkage voltage regulating circuit | |
| CN106455209A (en) | Dimming interface circuit and alternating current driving circuit | |
| CN221575162U (en) | Power supply control circuit | |
| CN222996718U (en) | Driver for lighting device and lighting device | |
| TWI865082B (en) | Power supply having adaptive voltage compensation loop and related system | |
| CN110677031A (en) | Soft start circuit of power control chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |