CN115912676A - Wireless charging receiver - Google Patents
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- CN115912676A CN115912676A CN202310054384.4A CN202310054384A CN115912676A CN 115912676 A CN115912676 A CN 115912676A CN 202310054384 A CN202310054384 A CN 202310054384A CN 115912676 A CN115912676 A CN 115912676A
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- 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
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Abstract
The invention discloses a wireless charging receiver, which converts input alternating current into direct current required by a system, and uses the direct current to supply power to the receiver. Therefore, the efficiency of the receiver can be obviously improved, the cost of the receiver is reduced, the effect is especially obvious in a high-voltage application scene, and the chip area of the whole wireless charging receiver is smaller.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging receiver.
Background
Along with the continuous enhancement of the functions of portable electronic equipment, the power consumption speed of the electronic equipment is higher and higher, so that higher requirements are provided for a convenient and quick charging mode, and how to quickly and safely charge a battery becomes a research hotspot in the field of power management. Compared with the traditional wired charging mode, the wireless charging mode mainly depends on magnetic field energy transmission, does not cause accidents such as short circuit and fire, and is safer compared with the wired charging mode.
The larger the output power of the wireless charging receiver is, the faster the charging speed of the device is. The output power of the wireless charging receiver is improved mainly by improving the output current and the output voltage of the receiver. Fig. 1 shows a wireless charging system, in which the transmission loss due to parasitic resistance of a coil and a wire of the wireless charging system is P = I 2 R and P are transmission loss values, I is a current value, and R is a resistance value. For the same output power, the charging current can be reduced by adopting high-voltage charging, and the conduction loss of the system is obviously reduced. The receiver system with the high-voltage architecture is generally powered by a low voltage, and the high voltage output by the receiver needs to be stepped down before powering the receiver system itself, which causes additional loss and increases the cost of the receiver. The receiver in the wireless charging system requires self-powering due to the applied devices, the application scenes and other reasons, and does not need an external power supply. Conventional low voltage receivers, because of their relatively low output voltage design, typically use the output voltage of the receiver directly to power the control and power stages of the receiver system. For a high-voltage high-power receiver, the output voltage is higher, so that the system cannot be directly supplied with power. Specifically, the following schemes are currently available:
a single-stage receiver (article 1 a 6.78-MHz single-stage wireless power receiver using a 3-Mode receiver configuration receiver, "IEEE j. Solid-State Circuits, vol. 52, no. 5, pp. 1412-1423, may2017.), whose structure is shown in fig. 2; the resonant circuit 100 composed of an inductor and a capacitor is used for receiving energy transmitted by the transmitter, the received alternating current is converted into direct current through a 3-Mode active rectifier (i.e., an active rectifier in three operating modes) 200, the receiver can directly output a stable direct current to be provided to a load 300, and the output direct current can be used as a power supply for a control circuit and a driving circuit 400 of the system. The 3-Mode active rectifier in the receiver has three different operation modes, namely a full-bridge rectification Mode (1X), a half-bridge rectification Mode (1/2X) and an idle Mode (0X), and the three different operation modes have different capacities of corresponding output currents, so that the voltage VDC of output direct current can be adjusted by adjusting the input alternating current Iac.
When the load is light, the active rectifier works under 0X and 1 < 82602 > X modes; under heavy load, the active rectifier works under 1\8260; 2X and 1X modes. The purpose of stabilizing the output voltage is achieved by adjusting the duty ratio. The receiver adopts a single-stage architecture to realize energy conversion and voltage regulation, and the efficiency of the receiver is improved. As previously mentioned, receivers in wireless charging systems are required to be self-powered, requiring no external power source. Since the receiver adopting the architecture shown in fig. 2 has only a stable output voltage, the receiver output voltage can only be used as a power supply for the receiver system. The control stage and power stage of the receiver system are generally powered by voltage power supplies, which greatly limits the application of the architecture, so that the architecture is only suitable for low-voltage scenarios, and the relationship between the output voltage of the receiver and the power supply voltage of the receiver system needs to be carefully considered in the design.
As mentioned above, the receiver shown in fig. 2 is only suitable for low voltage scenarios, and the output voltage of the receiver cannot be directly used to power the system; to solve this problem, a special BUCK module is introduced to power the system, such as LDO (linear regulator) or BUCK (BUCK converter), as shown in fig. 3, which is a schematic diagram of a high-voltage architecture wireless charging receiver system. This undoubtedly increases the cost of the receiver and reduces the efficiency of the receiver.
For example, in article 2 (S. -J. Oh et al, "A15-W quad-Mode Reconfigurable Bidirectional Wireless Power Transceiver With 95% System Efficiency for Wireless Charging Applications," in IEEE Transactions on Power Electronics, vol. 36, no. 4, pp. 3814-3827, april 1, doi: 10.1109/TPEL. 2020.3024915.), a receiver With a maximum output Power of 15W is proposed, and the output voltage of the receiver is 12V. The control circuit of the receiver and the driving circuit of the power tube supply 5V, so that a linear voltage regulator of 12V to 5V is used in the receiver to supply power to the system, the efficiency of the LDO is about 40%, energy waste is serious, even if the receiver uses an active rectification scheme and uses a zero-voltage switching technology to improve efficiency, under the A4WP (wireless power alliance) standard, the peak efficiency of the receiver is only 93.6%. Article 3 (J.Wu, L.Bie, W.Kong, P.Gao and Y.Wang, "Multi-Frequency Multi-Amplitude superior Modulation Method with phase Shift Optimization for Single Inverter of Wireless Power Transfer System," in IEEE Transactions on Circuits and Systems I: regulated Power Papers, vol.68, no. 5, pp.2271-2279, may 2021, doi: 10.1109/TCSI.2021.3062.) proposes a Wireless charging receiver that meets the requirement of fast charging, which employs an architecture of an active rectifier plus a DC-DC converter (DC-DC converter), with an output voltage of 5V, and can be used directly to Power a System. The scheme increases the output power by increasing the output current, so as to meet the requirement of quick charging, which results in that the conduction loss of the system is large, the maximum output power of the receiver is 9W, and under the A4WP standard, the peak efficiency is only 84.5%.
In the above fig. 1 to 3, C represents a capacitor, L represents an inductor, R represents a resistor, and M L Denotes a low-voltage MOS transistor (MOSFET), M N The reference numeral indicates an NMOS tube (N-type metal oxide semiconductor field effect transistor), and subscripts indicate the identification of corresponding components; v out And V DC Both represent the voltage of the output dc power, and VAC1 and VAC2 represent the input terminals of two branches (i.e., the output terminals of the lc resonant circuit shown in fig. 3) in the high-voltage architecture wireless charging receiver system.
In general, the existing wireless charging receiver mainly has the following two technical problems:
1. the existing wireless charging receiver has the problems of low efficiency, large chip area and high chip cost, the output power of the receiver is generally low, the requirement of quick charging cannot be met, and the application scene is limited.
2. The high-voltage wireless charging receiver meeting the requirement of quick charging does not solve the power supply problem of a good system, and a special voltage reduction module such as LDO (low dropout regulator) and BUCK (BUCK converter) is needed, so that the efficiency of the receiver is reduced, and the cost of the receiver is increased.
Disclosure of Invention
The invention aims to provide a wireless charging receiver which is small in chip area, the efficiency of the receiver is obviously improved, the cost of the receiver is reduced, and the application range is widened.
The purpose of the invention is realized by the following technical scheme:
a wireless charging receiver, comprising: the self-powered module circuit comprises an inductance-capacitance resonant circuit, a self-powered module circuit, a rectifying circuit and a feedback control circuit; wherein:
the inductance-capacitance resonant circuit is used for outputting the received alternating current to the rectifying circuit and the self-powered module circuit;
the self-powered module circuit is used for converting the alternating current from the inductance-capacitance resonant circuit into direct current with specified power supply voltage and providing the direct current to the rectifying circuit;
the rectifying circuit is used for converting the alternating current from the inductance-capacitance resonant circuit into direct current with specified charging voltage under the control of the feedback control circuit and outputting the direct current to the charging equipment and the feedback control circuit;
the feedback control circuit is used for controlling the rectifying circuit according to the charging voltage of the direct current output by the rectifying circuit, so that the charging voltage of the direct current output by the rectifying circuit is a specified charging voltage.
According to the technical scheme provided by the invention, the input alternating current is converted into the direct current required by the system, and the direct current is used for supplying power to the receiver. Therefore, the efficiency of the receiver can be obviously improved, the cost of the receiver is reduced, the effect is especially obvious in a high-voltage application scene, and the chip area of the whole wireless charging receiver is smaller.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional wireless charging system according to the background art of the present invention;
fig. 2 is a schematic structural diagram of a receiver with a single-stage architecture according to the background art of the present invention;
fig. 3 is a schematic diagram of a power supply of a wireless charging receiver system with a conventional high-voltage architecture according to the background art of the present invention;
fig. 4 is a schematic structural diagram of a wireless charging receiver according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first power stage circuit in a rectifier circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an embodiment of a wireless charging receiver according to the present invention;
FIG. 7 is a schematic diagram of an embodiment of a self-powered module circuit provided in accordance with an embodiment of the present invention;
fig. 8 is a waveform diagram illustrating the working principle of the self-powered module circuit according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The terms that may be used herein are first described as follows:
the terms "comprising," "including," "containing," "having," or other similar terms of meaning should be construed as non-exclusive inclusions. For example: including a feature (e.g., material, component, ingredient, carrier, formulation, material, dimension, part, component, mechanism, device, step, process, method, reaction condition, processing condition, parameter, algorithm, signal, data, product, or article, etc.) that is not specifically recited, should be interpreted to include not only the specifically recited feature but also other features not specifically recited and known in the art.
Unless otherwise expressly stated or limited, the terms "connected," "connected," and the like are to be construed broadly, as for example: can be fixedly connected, can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.
A wireless charging receiver according to the present invention is described in detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art. Those not specifically mentioned in the examples of the present invention were carried out according to the conventional conditions in the art or conditions suggested by the manufacturer. The reagents and instruments used in the examples of the present invention are not specified by manufacturers, and are conventional products commercially available.
As shown in fig. 4, a schematic structural diagram of a wireless charging receiver according to an embodiment of the present invention mainly includes: it is characterized by comprising the following steps: inductance-capacitance resonance circuit, self-powered module circuit, rectifier circuit and feedback control circuit.
The inductance-capacitance resonance circuit is used for outputting the received alternating current to the rectifying circuit and the self-powered module circuit;
the self-powered module circuit is used for converting the alternating current from the inductance-capacitance resonance circuit into direct current with specified power supply voltage and supplying the direct current to the rectifying circuit;
the rectifying circuit is used for converting alternating current from the inductance-capacitance resonant circuit into direct current with specified charging voltage under the control of the feedback control circuit and outputting the direct current to the charging equipment and the feedback control circuit;
the feedback control circuit is used for controlling the rectifying circuit according to the charging voltage of the direct current output by the rectifying circuit, so that the charging voltage of the direct current output by the rectifying circuit is a specified charging voltage.
The wireless charging receiver provided by the embodiment of the invention solves the problem of self power supply of the wireless charging receiver, the chip area of the whole wireless charging receiver is smaller, the efficiency of the receiver is improved, the cost of the receiver is reduced, and the application scene of the wireless charging receiver is wider.
In order to more clearly show the technical solutions and the technical effects provided by the present invention, the following description is made in detail with respect to the wireless charging receiver.
1. Inductance-capacitance resonant circuit.
In an embodiment of the present invention, the lc resonant circuit mainly includes: a capacitor and an inductor; one end of the capacitor is connected with one end of the inductor, the other end of the capacitor is connected with the first branch output end of the inductor-capacitor resonance circuit, and the other end of the inductor is connected with the second branch output end of the inductor-capacitor resonance circuit; the output ends of the first branch circuit and the second branch circuit are both connected with the rectifying circuit; and the first branch output end or the second branch output end is connected with the self-powered module circuit.
In fig. 4, C represents a capacitor, L represents an inductor, and subscripts represent identifiers of components, where the components mainly refer to various components in a circuit, such as the capacitor and the inductor; in FIG. 4, V AC1 Indicating the output of the first branch of the LC resonant circuit, V AC2 And the output end of the second branch of the inductance-capacitance resonant circuit is shown.
2. A rectifier circuit.
In an embodiment of the present invention, the rectifier circuit includes: the power stage circuit is called a first power stage circuit, and the input of the power stage circuit is alternating current from the inductance-capacitance resonance circuit; the first power stage circuit includes: the active diodes (for example, 4 active diodes) can constitute different operation modes, and the charging currents of the direct currents output in the different operation modes are different.
In FIG. 4, V DC The charging voltage output from the rectifying circuit, i.e., the charging voltage of the direct current output from the rectifying circuit, is a constant voltage, which is supplied to the charging device (i.e., the load). The output current capacities of different working modes are different, and the output current is adjusted by adjusting the duty ratios of the different working modes, so that the purpose of stably outputting the charging voltage is achieved.
FIG. 5 shows a first power stage circuit structure in a rectifier circuit, in which an example of 4 active diodes are provided, namely a first active diode, a second active diode, a third active diode and a fourth active diode, each of which is composed of a Comparator (CMP), a switch and a corresponding MOS (metal oxide semiconductor) transistor, wherein the first active diode and the third active diode are connected to a first branch output end V of an inductance-capacitance resonant circuit AC1 The second active diode and the fourth active diode are connected with the output end V of the first branch circuit of the inductance-capacitance resonant circuit AC2 And the first active diode is connected with the second active diode, and the third active diode is connected with the fourth active diode.
3. A feedback control circuit.
In an embodiment of the present invention, the feedback control circuit is configured to control the rectifying circuit according to a charging voltage of the direct current output by the rectifying circuit, specifically: and controlling the duty ratios of different working modes according to the charging voltage of the direct current output by the rectifying circuit, so that the charging voltage of the direct current output by the rectifying circuit is stabilized at a specified value (specified charging voltage).
In the embodiment of the present invention, the specific value of the designated charging voltage may be set by the user according to the actual situation, and the specific value is not limited in the present invention.
4. A self-powered module circuit.
In an embodiment of the present invention, the self-powered module circuit includes: a power stage circuit (called as a second power stage circuit) and a control stage circuit; the input of the second power stage circuit is alternating current from the inductance-capacitance resonance circuit, and the output direct current is connected with the power supply end of the rectifying circuit and the input end of the control stage circuit; the output end of the control stage circuit is connected with the control end of the second power stage circuit, and the control stage circuit outputs a corresponding control signal according to the supply voltage of the direct current output by the second power stage circuit, so that the supply voltage of the direct current output by the second power stage circuit is the designated supply voltage.
In an embodiment of the present invention, the second power stage circuit includes: a rectifier tube and a control switch; the positive end of the rectifier tube is connected with the input end of the power supply module circuit and receives alternating current from the inductance-capacitance resonance circuit, and the negative end of the rectifier tube is connected with the control switch, so that the alternating current from the inductance-capacitance resonance circuit is rectified into direct current through the rectifier tube and is used as the direct current output by the self-power supply module circuit; the control switch is connected with the control end of the self-powered module circuit, the on-off control of the control switch is realized according to the received control signal, and the power supply voltage of the direct current output by the rectifier tube is adjusted by turning on or off the control switch.
FIG. 4 illustrates a self-powered module circuit connected to the output V of the second branch of the LC tank AC2 Of course, the first branch output V can also be connected AC1 In fig. 4, VDD represents the supply voltage of the dc power outputted by the second power stage circuit, that is, the supply voltage of the dc power outputted by the self-powered module circuit.
The wireless charging receiver provided by the embodiment of the invention adopts a brand-new self-powered scheme, and overcomes the defects of complex receiver power supply design, high cost and low efficiency under a high-voltage framework. As shown in fig. 6, an embodiment of a wireless charging receiver is provided, in which a self-powered module circuit is also provided to connect the output terminal V of the second branch of the lc resonant circuit AC2 While also providing self-provisioningAn example of an internal structure of an electric module circuit; the rectifier tube in the second power stage circuit uses diode D1, the control switch is realized by using switch S1, and the output end V of the second branch circuit of the inductance-capacitance resonant circuit AC2 The positive end of a diode D1 is connected, the negative end of the diode D1 is connected to a switch S1, and the output end V of a second branch circuit of the inductance-capacitance resonant circuit AC2 The alternating current of (a) is rectified into direct current through a diode D1. The control stage circuit is realized by using a hysteresis control scheme or a pulse width modulation scheme and the like, and the output control signal is used for controlling the rising or falling of the power supply voltage of the direct current output by the second power stage circuit; of course, the above two schemes are not limited, and the user may use other modulation schemes to modulate the output VDD so that VDD is stabilized at a specified value. Preferably, a hysteresis control scheme may be employed, where when VDD is lower than the lower reference voltage, the switch S1 is turned on, and VDD rises. When VDD is higher than the upper reference voltage, switch S1 is turned off, at which time VDD drops. In FIG. 6, V FB The supply voltage, i.e., the feedback voltage, is representative of the dc power output by the second power stage circuit that the control stage circuit receives.
FIG. 7 shows an example of a self-powered module circuit implementation, FIG. 8 shows a waveform schematic diagram of the self-powered module operation principle, and FIG. 7 shows an example of a diode D1 for the rectifier and a switch M for the control switch S1 The implementation is carried out; the control stage circuit is implemented using a hysteretic control scheme, comprising: level shift and drive circuit (Level-Shifter)&Driver), and a hysteresis comparator. The input of the hysteresis comparator is the supply voltage of the direct current output by the second power stage circuit, i.e. the aforementioned feedback voltage V FB And is in conjunction with a set lower limit reference voltage V L And an upper limit reference voltage V H Comparing; if V FB ＜V L Then, a high level signal is output, and the high level signal enters the control end of the second power stage circuit through the level shift and drive circuit to control the control switch (i.e. the switch tube M) in the second power stage circuit S1 ) At the time of starting, the LC resonance circuit stops passing through the output end V of the second branch circuit AC2 Charging the load, preferentially charging VDD, and enabling the second power level to be chargedThe supply voltage (i.e., VDD) of the dc power output by the circuit rises; VDD is gradually raised until V FB ＞V H When the power supply is started, a low level signal is output, enters the control end of the second power level circuit through the level shift and drive circuit, and controls a control switch (namely a switch tube M) in the second power level circuit S1 ) In the off state, the LC resonance circuit stops passing through the output end V of the second branch circuit AC2 Charging VDD to reduce the supply voltage of the direct current output by the second power stage circuit; in the above process, the high level signal and the low level signal both belong to the control signal (V) DD_Control ). Through the scheme, the VDD can be maintained at the specified value, so that the power supply for the receiver can be stably realized.
The description of the more conventional structures, such as: in the structure shown in fig. 4 and 6, the output end of the rectifier further has a filter capacitor C O The output of the self-powered module circuit is also provided with a filter capacitor C 1 (ii) a In the configuration shown in fig. 7, the output of the self-powered module circuit is also passed through two resistors (R) 1 And R 2 ) Grounded and the input of the hysteresis comparator is connected between the two resistors.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A wireless charging receiver, comprising: the self-powered circuit comprises an inductance-capacitance resonant circuit, a self-powered module circuit, a rectifying circuit and a feedback control circuit; wherein:
the inductance-capacitance resonant circuit is used for outputting the received alternating current to the rectifying circuit and the self-powered module circuit;
the self-powered module circuit is used for converting the alternating current from the inductance-capacitance resonant circuit into direct current with specified power supply voltage and providing the direct current to the rectifying circuit;
the rectifying circuit is used for converting alternating current from the inductance-capacitance resonant circuit into direct current with specified charging voltage under the control of the feedback control circuit and outputting the direct current to the charging equipment and the feedback control circuit;
the feedback control circuit is used for controlling the rectifying circuit according to the charging voltage of the direct current output by the rectifying circuit, so that the charging voltage of the direct current output by the rectifying circuit is a specified charging voltage.
2. The wireless charging receiver of claim 1, wherein the rectifying circuit comprises: a first power stage circuit, the input of which is alternating current from the inductance-capacitance resonance circuit;
the first power stage circuit includes: the active diodes can form different working modes, the charging currents of the direct current output under the different working modes are different, and the output current is adjusted by controlling the duty ratios of the different working modes.
3. The wireless charging receiver of claim 2, wherein the feedback control circuit for controlling the rectifying circuit according to the charging voltage of the direct current output by the rectifying circuit comprises:
and the feedback control circuit controls the duty ratios of different working modes according to the charging voltage of the direct current output by the rectifying circuit.
4. The wireless charging receiver of claim 1, wherein the self-powered module circuit comprises: the second power stage circuit and the control stage circuit;
the input of the second power stage circuit is alternating current from the inductance-capacitance resonance circuit, and the output direct current is connected with the power supply end of the rectification circuit and the input end of the control stage circuit; the output end of the control stage circuit is connected with the control end of the second power stage circuit, and the control stage circuit outputs a corresponding control signal according to the supply voltage of the direct current output by the second power stage circuit, so that the supply voltage of the direct current output by the second power stage circuit is the designated supply voltage.
5. The wireless charging receiver of claim 4, wherein the second power stage circuit comprises: a rectifier tube and a control switch;
the positive end of the rectifier tube is connected with the input end of the power supply module circuit and receives alternating current from the inductance-capacitance resonance circuit, and the negative end of the rectifier tube is connected with the control switch, so that the alternating current from the inductance-capacitance resonance circuit is rectified into direct current through the rectifier tube and is used as the direct current output by the self-power supply module circuit;
the control switch is connected with the control end of the self-powered module circuit, the on-off control of the control switch is realized according to the received control signal, and the supply voltage of the direct current output by the rectifying tube is adjusted by turning on or off the control switch.
6. The wireless charging receiver of claim 4 or 5, wherein the control stage circuit outputs the corresponding control signal according to the supply voltage of the direct current output by the second power stage circuit comprises:
the control stage circuit is realized by using a hysteresis control scheme or a pulse width modulation scheme, and the output control signal is used for controlling the rising or falling of the supply voltage of the direct current output by the second power stage circuit.
7. The wireless charging receiver of claim 6, wherein when the control stage circuit is implemented using a hysteretic control scheme, the control stage circuit comprises: a level shift and drive circuit, and a hysteresis comparator; wherein:
the input of the hysteresis comparator is the supply voltage of the direct current output by the second power stage circuit, and is marked as V FB And with settingLower limit reference voltage V L And an upper limit reference voltage V H Comparing;
when V is FB ＜V L When the power supply voltage is in a high-voltage state, the high-voltage signal is output, enters the control end of the second power stage circuit through the level shifting and driving circuit, controls a control switch in the second power stage circuit to be in an on state, and enables the power supply voltage of the direct current output by the second power stage circuit to be increased; when V is FB ＞V H When the power supply voltage of the direct current output by the second power level circuit is reduced, a low level signal is output, enters the control end of the second power level circuit through the level shifting and driving circuit, and controls a control switch in the second power level circuit to be in an off state;
and the high level signal and the low level signal both belong to control signals.
8. The wireless charging receiver of claim 1, 2 or 4, wherein the LC resonant circuit comprises: a capacitor and an inductor; one end of the capacitor is connected with one end of the inductor, the other end of the capacitor is connected with the first branch output end of the inductor-capacitor resonance circuit, and the other end of the inductor is connected with the second branch output end of the inductor-capacitor resonance circuit; the output end of the first branch circuit and the output end of the second branch circuit are both connected with the rectifying circuit; and the first branch output end or the second branch output end is connected with the self-powered module circuit.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03293965A (en) * | 1990-04-10 | 1991-12-25 | Matsushita Electric Ind Co Ltd | Dc power unit |
| JP2016152642A (en) * | 2015-02-16 | 2016-08-22 | Tdk株式会社 | Control circuit and switching power supply unit |
| WO2019223003A1 (en) * | 2018-05-25 | 2019-11-28 | Oppo广东移动通信有限公司 | Wireless charging receiving device and mobile terminal |
| CN111769759A (en) * | 2020-08-24 | 2020-10-13 | 宁波中车时代传感技术有限公司 | Self-powered railway wagon state monitoring system based on vibration energy collector |
-
2023
- 2023-02-03 CN CN202310054384.4A patent/CN115912676A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03293965A (en) * | 1990-04-10 | 1991-12-25 | Matsushita Electric Ind Co Ltd | Dc power unit |
| JP2016152642A (en) * | 2015-02-16 | 2016-08-22 | Tdk株式会社 | Control circuit and switching power supply unit |
| WO2019223003A1 (en) * | 2018-05-25 | 2019-11-28 | Oppo广东移动通信有限公司 | Wireless charging receiving device and mobile terminal |
| CN111566894A (en) * | 2018-05-25 | 2020-08-21 | Oppo广东移动通信有限公司 | Wireless charging receiving device and mobile terminal |
| CN111769759A (en) * | 2020-08-24 | 2020-10-13 | 宁波中车时代传感技术有限公司 | Self-powered railway wagon state monitoring system based on vibration energy collector |
Non-Patent Citations (1)
| Title |
|---|
| LIN CHENG: "A 6.78MHz 6W wireless power receiver with a 3-level 1× / ½ × / 0× reconfigurable resonant regulating rectifier", 《2016 IEEE INTERNATIONAL SOLID-STATE CIRCUITS CONFERENCE (ISSCC)》 * |
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Application publication date: 20230404 |