Bidirectional direct current conversion circuit and electronic equipment

Abstract

A bidirectional DC conversion circuit and an electronic device belong to the technical field of power supplies, and are connected with an energy storage circuit, and the energy storage circuit performs charging according to power supply DC or is used for outputting battery voltage; a configuration channel signal is accessed through a control circuit, a first switching signal is output in response to the configuration channel signal being a first level, or an enable signal is output in response to the configuration channel signal being a second level; the first switching circuit is connected with power supply direct current and transmits the power supply direct current to the energy storage circuit based on the first switching signal; the voltage transformation circuit is used for converting the battery voltage based on the enable signal so as to output power supply voltage; therefore, the use convenience of the bidirectional DC conversion circuit is improved.

Description

Technical Field

[0001] The present application belongs to the field of power supply technology, and in particular relates to a bidirectional direct current conversion circuit and electronic equipment. Background Art

[0002] The relevant DC conversion circuit includes a transformer, rectifier, filter and voltage regulator circuit, and a data processing chip BUCK voltage conversion circuit; the input DC power output by the adapter is stabilized by the transformer, rectifier, filter and voltage regulator circuit, and the data processing chip communicates with the adapter data based on the universal serial bus (USB) power delivery (PD) protocol to generate a regulated voltage. The voltage conversion circuit steps down the stabilized input DC power according to the regulated voltage to output the power supply voltage to the powered device.

[0003] However, when the powered device is used outdoors, an adapter cannot be used to power the powered device, so the portability of the related DC conversion circuit is poor. It is urgent to provide a bidirectional DC conversion circuit to provide portability. Summary of the invention

[0004] The purpose of the present application is to provide a bidirectional DC conversion circuit and an electronic device, aiming to solve the problem of poor portability of related DC conversion circuits.

[0005] The embodiment of the present application provides a bidirectional DC conversion circuit connected to an energy storage circuit, wherein the energy storage circuit is used to charge according to the supply DC power or to output a battery voltage; the bidirectional DC conversion circuit includes:

[0006] A control circuit, configured to access a configuration channel signal, and output a first switch signal in response to the configuration channel signal being at a first level, or output an enable signal in response to the configuration channel signal being at a second level;

[0007] a first switch circuit, connected to the control circuit and the energy storage circuit, configured to access the power supply DC power and transmit the power supply DC power to the energy storage circuit based on the first switch signal;

[0008] A voltage transformation circuit is connected to the control circuit and the energy storage circuit, and is used to transform the battery voltage based on the enable signal to output a supply voltage.

[0009] In one embodiment, connected to a power supply device;

[0010] The energy storage circuit is also used to output battery status information;

[0011] The control circuit is also connected to the power supply device and the energy storage circuit, and is also used to output target DC power information according to the battery status information;

[0012] The power supply device is used to output the power supply DC power according to the target DC power information.

[0013] In one embodiment, the energy storage circuit comprises:

[0014] a battery assembly, connected to the voltage conversion circuit and the first switch circuit, and used for charging according to the supply DC power, or for outputting the battery voltage;

[0015] The battery management circuit is connected to the battery assembly and is used to detect the status of the battery assembly and output the battery status information.

[0016] In one embodiment, connecting to a powered device;

[0017] The powered device is used to output electrical parameter information;

[0018] The control circuit is also connected to the powered device and is further used to output a regulating voltage and a second switch signal according to the electrical parameter information;

[0019] a voltage conversion circuit, connected to the control circuit and the energy storage circuit, and configured to convert the battery voltage based on the enable signal, the regulation voltage and the second switch signal to output the supply voltage;

[0020] The powered device is used to charge and / or operate according to the supply voltage.

[0021] In one of the embodiments, the voltage conversion circuit includes a step-down circuit and a second switch circuit;

[0022] The control circuit is specifically used to access the configuration channel signal, output the first switch signal in response to the configuration channel signal being at a first level, output the enable signal in response to the configuration channel signal being at a second level, output the adjustment voltage according to the electrical parameter information, and output the second switch signal in response to the supply voltage being within a preset interval;

[0023] The step-down circuit is connected to the energy storage circuit and the control circuit, and is used to step down the battery voltage based on the adjustment voltage and the enable signal to output the supply voltage;

[0024] The second switch circuit is connected to the powered device, the step-down circuit and the control circuit, and is used to transmit the supply voltage to the powered device based on the second switch signal.

[0025] In one embodiment, the buck circuit includes a buck controller, a first field effect transistor, a second field effect transistor, a first diode, a second diode, an inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor;

[0026] The anode of the first diode constitutes the battery voltage input terminal of the step-down circuit, and is connected to the energy storage circuit and the first switch circuit to access the battery voltage;

[0027] The cathode of the first diode is connected to the first end of the first resistor and the drain of the first field effect tube, the power supply end of the buck controller is connected to the second end of the first resistor and the first end of the first capacitor, the high-side MOSFET gate drive end of the buck controller is connected to the first end of the second resistor, the second end of the second resistor is connected to the gate of the first field effect tube, the low-side MOSFET gate drive end of the buck controller is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the gate of the second field effect tube, the high-side gate drive bootstrap end of the first field effect tube is connected to the first end of the third resistor and the first end of the fourth capacitor, the second end of the third resistor is connected to the cathode of the second diode, the anode of the second diode is connected to the first power supply, and the second end of the fourth capacitor is connected to the first end of the inductor, the source of the first field effect tube, and the source of the second field effect tube. The drain of the step-down controller, the inductor terminal of the step-down controller and the first end of the fifth resistor are connected, the current protection configuration terminal of the step-down controller is connected to the second end of the fifth resistor and the first end of the fifth capacitor, the internal error amplifier output terminal of the step-down controller is connected to the first end of the sixth resistor and the first end of the sixth capacitor, the second end of the sixth resistor is connected to the first end of the seventh capacitor, the second end of the sixth capacitor is connected to the second end of the seventh capacitor, the first end of the seventh resistor, the first end of the eighth capacitor, the first end of the ninth resistor, the first end of the tenth resistor, and the external feedback terminal of the step-down controller, the second end of the eighth resistor is connected to the second end of the eighth capacitor, and the enable terminal of the step-down controller is connected to the first end of the eleventh resistor; the second end of the first capacitor, the second end of the third capacitor, the second end of the fifth capacitor and the second end of the ninth resistor are connected to the power ground;

[0028] The second end of the seventh resistor, the first end of the eighth resistor, the first end of the third capacitor and the second end of the inductor are connected and together constitute a power supply voltage output end of the step-down circuit, which is connected to the second switch circuit and the control circuit to output the power supply voltage;

[0029] The second end of the tenth resistor constitutes the regulated voltage input end of the step-down circuit and is connected to the control circuit to receive the regulated voltage;

[0030] The second end of the eleventh resistor constitutes an enable signal input end of the buck circuit and is connected to the control circuit to receive the enable signal.

[0031] In one embodiment, the second switch circuit includes a third field effect transistor, a fourth field effect transistor, a twelfth resistor and a thirteenth resistor;

[0032] The drain of the fourth field effect transistor constitutes the supply voltage input terminal of the second switch circuit, and is connected to the step-down circuit and the control circuit to access the supply voltage;

[0033] The source of the fourth field effect transistor is connected to the source of the third field effect transistor and the first end of the twelfth resistor, and the gate of the third field effect transistor is connected to the gate of the fourth field effect transistor, the second end of the twelfth resistor and the first end of the thirteenth resistor;

[0034] The second end of the thirteenth resistor constitutes a second switch signal input end of the second switch circuit, and is connected to the control circuit to receive the second switch signal;

[0035] The drain of the third field effect transistor constitutes the power supply voltage output terminal of the second switch circuit and is connected to the first switch circuit to output the power supply voltage.

[0036] In one embodiment, the control circuit includes a PD controller and a seventeenth resistor;

[0037] The N-MOSFET control terminal of the PD controller constitutes the second switch signal output terminal of the control circuit, and is connected to the second switch circuit to output the second switch signal;

[0038] The output voltage terminal of the PD controller constitutes the supply voltage input terminal of the control circuit, and is connected to the second switch circuit and the step-down circuit to access the supply voltage;

[0039] The first universal input-output terminal of the PD controller and the first terminal of the seventeenth resistor are connected and together constitute the enable signal output terminal of the control circuit, which is connected to the step-down circuit to output the enable signal;

[0040] The current source output terminal of the PD controller constitutes the regulated voltage output terminal of the control circuit and is connected to the step-down circuit to output the regulated voltage;

[0041] The second general input and output terminal of the PD controller constitutes the battery status signal input terminal of the control circuit, and is connected to the energy storage module to access the battery status information;

[0042] The first configuration channel terminal of the PD controller and the second configuration channel terminal of the PD controller are used together as a target DC power information output terminal of the control circuit, an electrical parameter information input terminal of the control circuit and a configuration channel signal input terminal of the control circuit, so as to access the electrical parameter information and the configuration channel signal and output the target DC power information;

[0043] The third general input and output terminal of the PD controller constitutes the first switch signal output terminal of the control circuit, and is connected to the first switch circuit to output the first switch signal;

[0044] The second end of the seventeenth resistor is connected to the signal ground.

[0045] In one embodiment, the first switch circuit includes a fifth field effect transistor, a sixth field effect transistor, a seventh field effect transistor, a fourteenth resistor, a fifteenth resistor and a sixteenth resistor;

[0046] The drain of the fifth field effect transistor constitutes the input end of the first switch circuit and is connected to the voltage conversion circuit to access the power supply DC;

[0047] The drain of the sixth field effect transistor constitutes the output end of the first switch circuit, and is connected to the voltage conversion circuit and the energy storage circuit to output the power supply DC;

[0048] The source of the fifth field effect transistor is connected to the source of the sixth field effect transistor and the first end of the fourteenth resistor, the gate of the fifth field effect transistor is connected to the second end of the fourteenth resistor, the gate of the sixth field effect transistor and the first end of the fifteenth resistor, the second end of the fifteenth resistor is connected to the drain of the seventh field effect transistor, and the source of the seventh field effect transistor and the first end of the sixteenth resistor are connected to the signal ground;

[0049] The gate of the seventh field effect transistor and the second end of the sixteenth resistor are connected and together constitute a control end of the first switch circuit, which is connected to the control circuit to receive the first switch signal.

[0050] An embodiment of the present invention further provides an electronic device, which includes the above-mentioned bidirectional direct current conversion circuit.

[0051] Compared with the prior art, the embodiments of the present invention have the following advantages: on the one hand, the DC power output by the power supply device can be transmitted to the energy storage module for charging; on the other hand, the battery voltage output by the energy storage circuit can be converted into a power supply voltage to power the powered device, and the powered device can be used outdoors, thereby improving the portability of the bidirectional DC conversion circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical invention in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 A schematic diagram of a bidirectional DC conversion circuit provided in one embodiment of the present application;

[0054] Figure 2 Another structural schematic diagram of a bidirectional DC conversion circuit provided in an embodiment of the present application;

[0055] Figure 3 A schematic diagram of a structure of an energy storage circuit in a bidirectional DC conversion circuit provided in an embodiment of the present application;

[0056] Figure 4 Another structural schematic diagram of a bidirectional DC conversion circuit provided in an embodiment of the present application;

[0057] Figure 5 A schematic diagram of a structure of a voltage transformer circuit in a bidirectional DC conversion circuit provided in an embodiment of the present application;

[0058] Figure 6 A partial exemplary circuit schematic diagram of a bidirectional DC conversion circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0061] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] Figure 1 The schematic diagram of the structure of the bidirectional DC conversion circuit provided by the preferred embodiment of the present application is shown. For the convenience of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0064] The bidirectional DC conversion circuit is connected to the energy storage circuit 90, which is used to charge according to the DC power supply or to output the battery voltage; the bidirectional DC conversion circuit includes a control circuit 01, a first switch circuit 02 and a voltage conversion circuit 03.

[0065] The control circuit 01 is used to access the configuration channel signal, and output a first switch signal in response to the configuration channel signal being at a first level, or output an enable signal in response to the configuration channel signal being at a second level.

[0066] The first switch circuit 02 is connected to the control circuit 01 and the energy storage circuit 90 , and is used for receiving the power supply DC power and transmitting the power supply DC power to the energy storage circuit 90 based on the first switch signal.

[0067] The voltage transformation circuit 03 is connected to the control circuit 01 and the energy storage circuit 90, and is used to transform the battery voltage based on the enable signal to output the supply voltage.

[0068] It is understandable that the supply voltage is used to power the powered device 70. The power supply DC and the configuration channel signal are provided by the power supply device 80. The energy storage circuit 90 includes a battery assembly 91. The first switch circuit 02 includes a switch tube. The voltage conversion circuit 03 can be a boost circuit or a buck circuit 031.

[0069] The first level may be a high level, and the second level may be a low level.

[0070] The configuration channel signal (CC) is a key channel in USB Type-C. Its functions include detecting USB connection, detecting forward and reverse insertion, and establishing and managing the connection between data and power supply voltage between USB devices.

[0071] like Figure 2 As shown, the bidirectional DC conversion circuit is connected to the power supply device 80 .

[0072] The energy storage circuit 90 is also used to output battery status information. It is understandable that the battery status information includes the voltage, current, power and temperature of the battery components in the energy storage circuit 90.

[0073] The control circuit 01 is also connected to the power supply device 80 and the energy storage circuit 90, and is also used to output target DC power information according to the battery status information.

[0074] The power supply device 80 is used to output power supply DC power according to the target DC power information.

[0075] It can be understood that the electrical parameters of the supply DC power are associated with the target DC power information, wherein the electrical parameters include voltage, current and power.

[0076] It should be noted that the power supply device 80 outputs direct current power supply, and the first switch circuit 02 transmits the direct current power supply to the energy storage circuit 90; the power supply device 80, the first switch circuit 02 and the energy storage circuit 90 constitute a main charging circuit in sequence.

[0077] Through the above communication between the energy storage circuit 90 and the control circuit 01 and the communication between the power supply device 80 and the control circuit 01, the power supply DC output by the power supply device 80 adapts to the battery status of the energy storage circuit 90, thereby improving the reliability of the bidirectional DC conversion circuit and enriching the functions of the product.

[0078] like Figure 3 As shown, the energy storage circuit 90 includes a battery assembly 91 and a battery management circuit 92 .

[0079] The battery assembly 91 is connected to the voltage conversion circuit 03 and the first switch circuit 02, and is used for charging according to the supplied direct current, or for outputting the battery voltage;

[0080] The battery management circuit 92 is connected to the battery assembly 91 and is used to detect the status of the battery assembly 91 and output battery status information.

[0081] It is understandable that the state of the battery assembly 91 includes voltage, current and temperature.

[0082] The state of the battery assembly 91 is detected by the battery management circuit 92, so that the DC power output by the power supply device 80 can be adapted to the battery state of the energy storage circuit 90, thereby improving the reliability of the bidirectional DC conversion circuit.

[0083] like Figure 4 As shown, the bidirectional DC conversion circuit is connected to the power receiving device 70 .

[0084] The powered device 70 is used to output electrical parameter information.

[0085] The control circuit 01 is also connected to the powered device 70, and is also used to output the regulated voltage and the second switch signal according to the electrical parameter information.

[0086] The voltage conversion circuit 03 is connected to the control circuit 01 and the energy storage circuit 90, and is used to convert the battery voltage based on the enable signal, the adjustment voltage and the second switch signal to output the supply voltage. It can be understood that the voltage conversion circuit 03 responds to the enable signal and converts the battery voltage according to the adjustment voltage and the second switch signal to output the supply voltage; thereby achieving the adjustable supply voltage, expanding the application scope of the bidirectional DC conversion circuit, and improving the flexibility of the bidirectional DC conversion circuit.

[0087] The powered device 70 is used to charge and / or operate according to the power supply voltage.

[0088] It can be understood that the electrical parameter information is associated with the electrical parameters of the direct current power required by the powered device 70 .

[0089] Through communication between the powered device 70 and the control circuit 01 and outputting the corresponding regulated voltage to the transformer circuit 03, the power supply voltage output by the transformer circuit 03 adapts to the powered device 70, thereby improving the reliability of the bidirectional DC conversion circuit and enriching the functions of the product.

[0090] like Figure 5 As shown, the voltage transformation circuit 03 includes a voltage step-down circuit 031 and a second switch circuit 032 .

[0091] The control circuit 01 is specifically used to access the configuration channel signal, output a first switch signal in response to the configuration channel signal being at a high level, output an enable signal in response to the configuration channel signal being at a low level, output a regulation voltage according to the electrical parameter information, and output a second switch signal in response to the power supply voltage being in a preset interval;

[0092] The step-down circuit 031 is connected to the energy storage circuit 90 and the control circuit 01, and is used to step down the battery voltage based on the adjustment voltage and the enable signal to output the supply voltage;

[0093] The second switch circuit 032 is connected to the powered device 70 , the voltage reduction circuit 031 and the control circuit 01 , and is used to transmit the power supply voltage to the powered device 70 based on the second switch signal.

[0094] It can be understood that the preset interval is associated with the electrical parameter information, and the voltage corresponding to the electrical parameter information is within the preset interval.

[0095] It should be noted that the energy storage circuit 90 outputs the battery voltage, the step-down circuit 031 steps down the battery voltage to output the power supply voltage; the second switch circuit 032 transmits the power supply voltage to the powered device 70; the energy storage circuit 90, the step-down circuit 031, the second switch circuit 032 and the powered device 70 constitute a main discharge circuit in sequence.

[0096] Through the step-down circuit 031 and the second switch circuit 032, when the power supply voltage is within a preset range, the second switch circuit 032 transmits the power supply voltage to the powered device 70 based on the second switch signal, thereby reducing abnormal operation or damage of the powered device 70 caused by unstable power supply voltage and improving the reliability and safety of the bidirectional DC conversion circuit.

[0097] Figure 6 A partial exemplary circuit structure of a bidirectional DC conversion circuit provided by an embodiment of the present invention is shown. For the sake of convenience, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0098] The buck circuit 031 includes a buck controller U1, a first field effect transistor M1, a second field effect transistor M2, a first diode D1, a second diode D2, an inductor L1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10 and an eleventh resistor R11.

[0099] The anode of the first diode D1 constitutes the battery voltage input terminal of the step-down circuit 031 and is connected to the energy storage circuit 90 and the first switch circuit 02 to access the battery voltage.

[0100] The cathode of the first diode D1 is connected to the first end of the first resistor R1 and the drain of the first field effect transistor M1. The power supply terminal VIN of the buck controller U1 is connected to the second end of the first resistor R1 and the first end of the first capacitor C1. The high-side metal-oxide-semiconductor field-effect transistor (metal-oxide-semiconductor field-effect transistor) of the buck controller U1 The gate drive terminal HO of a first transistor (MOSFET) is connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the gate of the first field effect transistor M1, the low-side MOSFET gate drive terminal LO of the buck controller U1 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the gate of the second field effect transistor M2, the high-side gate drive bootstrap terminal BST of the first field effect transistor M1 is connected to the first end of the third resistor R3 and the first end of the fourth capacitor C4, the second end of the third resistor R3 is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to the first power supply VAA, the second end of the fourth capacitor C4 is connected to the first end of the inductor L1, the source of the first field effect transistor M1, the drain of the second field effect transistor M2, the inductor terminal LX of the buck controller U1 and the first end of the fifth resistor R5, the buck controller U1 The current protection configuration terminal ILIM is connected to the second end of the fifth resistor R5 and the first end of the fifth capacitor C5, the internal error amplifier output terminal COMP of the buck controller U1 is connected to the first end of the sixth resistor R6 and the first end of the sixth capacitor C6, the second end of the sixth resistor R6 is connected to the first end of the seventh capacitor C7, the second end of the sixth capacitor C6 is connected to the second end of the seventh capacitor C7, the first end of the seventh resistor R7, the first end of the eighth capacitor C8, the first end of the ninth resistor R9, the first end of the tenth resistor R10, and the external feedback terminal FB of the buck controller U1, the second end of the eighth resistor R8 is connected to the second end of the eighth capacitor C8, the enable terminal EN of the buck controller U1 is connected to the first end of the eleventh resistor R11; the second end of the first capacitor C1, the second end of the third capacitor C3, the second end of the fifth capacitor C5 and the second end of the ninth resistor R9 are connected to the power ground.

[0101] The second end of the seventh resistor R7, the first end of the eighth resistor R8, the first end of the third capacitor C3 and the second end of the inductor L1 are connected and together constitute the power supply voltage output end of the step-down circuit 031, which is connected to the second switch circuit 032 and the control circuit 01 to output the power supply voltage.

[0102] The second end of the tenth resistor R10 constitutes the regulated voltage input end of the step-down circuit 031 and is connected to the control circuit 01 to receive the regulated voltage.

[0103] The second end of the eleventh resistor R11 constitutes an enable signal input end of the step-down circuit 031 and is connected to the control circuit 01 to receive the enable signal.

[0104] The step-down circuit 031 can adjust the supply voltage through the regulation voltage connected to the external feedback terminal FB, and at the same time, realize the stable output of the supply voltage through the negative feedback loop of the supply voltage, so that a wide range of output and high stability can be achieved.

[0105] The second switch circuit 032 includes a third field effect transistor M3, a fourth field effect transistor M4, a twelfth resistor R12 and a thirteenth resistor R13.

[0106] The drain of the fourth field effect transistor M4 constitutes the supply voltage input terminal of the second switch circuit 032 , and is connected to the step-down circuit 031 and the control circuit 01 to access the supply voltage.

[0107] The source of the fourth field effect transistor M4 is connected to the source of the third field effect transistor M3 and the first end of the twelfth resistor R12, and the gate of the third field effect transistor M3 is connected to the gate of the fourth field effect transistor M4, the second end of the twelfth resistor R12 and the first end of the thirteenth resistor R13.

[0108] The second end of the thirteenth resistor R13 constitutes a second switch signal input end of the second switch circuit 032 and is connected to the control circuit 01 to receive the second switch signal.

[0109] The drain of the third field effect transistor M3 constitutes the power supply voltage output terminal of the second switch circuit 032 and is connected to the first switch circuit 02 to output the power supply voltage.

[0110] The second switch circuit 032 includes two field effect transistors connected in opposite phases, so the leakage current is relatively small.

[0111] The control circuit 01 includes a power delivery (PD) controller U2 and a seventeenth resistor R17 .

[0112] The N-MOSFET control terminal USBP of the PD controller U2 constitutes the second switch signal output terminal of the control circuit 01, and is connected to the second switch circuit 032 to output the second switch signal.

[0113] The output voltage terminal VO of the PD controller U2 constitutes the power supply voltage input terminal of the control circuit 01, and is connected to the second switch circuit 032 and the step-down circuit 031 to access the power supply voltage.

[0114] The first general purpose input / output terminal GPIO1 of the PD controller U2 and the first end of the seventeenth resistor R17 are connected and together constitute an enable signal output terminal of the control circuit 01 , and are connected to the step-down circuit 031 to output an enable signal.

[0115] The current source output terminal OPTO of the PD controller U2 constitutes the regulated voltage output terminal of the control circuit 01 and is connected to the step-down circuit 031 to output the regulated voltage.

[0116] The second general purpose input and output terminal GPIO2 of the PD controller U2 constitutes a battery status signal input terminal of the control circuit 01 and is connected to the energy storage module to access the battery status information.

[0117] The first configuration channel terminal CC1 of the PD controller U2 and the second configuration channel terminal CC2 of the PD controller U2 jointly serve as the target DC power information output terminal of the control circuit 01, the electrical parameter information input terminal of the control circuit 01 and the configuration channel signal input terminal of the control circuit 01 to access the electrical parameter information and the configuration channel signal and output the target DC power information.

[0118] The third general purpose input and output terminal GPIO3 of the PD controller U2 constitutes the first switch signal output terminal of the control circuit 01 and is connected to the first switch circuit 02 to output the first switch signal.

[0119] A second end of the seventeenth resistor R17 is connected to the signal ground.

[0120] The control circuit 01 realizes the communication between the energy storage circuit 90 and the equipment (including the power supply equipment 80 and the power receiving equipment 70), and realizes the connection and disconnection control of the discharge circuit and the charging circuit. The circuit is simple and reliable.

[0121] The first switch circuit 02 includes a fifth field effect transistor M5, a sixth field effect transistor M6, a seventh field effect transistor M7, a fourteenth resistor R14, a fifteenth resistor R15 and a sixteenth resistor R16.

[0122] The drain of the fifth field effect transistor M5 constitutes the input end of the first switch circuit 02 and is connected to the voltage conversion circuit 03 to receive the DC power supply.

[0123] The drain of the sixth field effect transistor M6 constitutes the output end of the first switch circuit 02, and is connected to the voltage transformation circuit 03 and the energy storage circuit 90 to output the power supply DC.

[0124] The source of the fifth field effect transistor M5 is connected to the source of the sixth field effect transistor M6 and the first end of the fourteenth resistor R14, the gate of the fifth field effect transistor M5 is connected to the second end of the fourteenth resistor R14, the gate of the sixth field effect transistor M6, and the first end of the fifteenth resistor R15, the second end of the fifteenth resistor R15 is connected to the drain of the seventh field effect transistor M7, and the source of the seventh field effect transistor M7 and the first end of the sixteenth resistor R16 are connected to the signal ground.

[0125] The gate of the seventh field effect transistor M7 and the second end of the sixteenth resistor R16 are connected and together constitute a control end of the first switch circuit 02 , which is connected to the control circuit 01 to receive the first switch signal.

[0126] The first switch circuit 02 includes two field effect transistors connected in anti-phase, so the leakage current is small.

[0127] It can be understood that a current limiting resistor is provided between the signal ground and the power ground.

[0128] The following is a combination of working principles Figure 6 As shown for further explanation:

[0129] Figure 6 The working principle of the bidirectional DC conversion circuit shown is divided into two cases.

[0130] In the first case, the bidirectional DC conversion circuit is connected to the power supply device 80. The battery management circuit 92 detects the status of the battery assembly 91 and outputs the battery status information to the second general input and output terminal GPIO2 of the PD controller U2. The PD controller U2 outputs the target DC power information from the first configuration channel terminal CC1 of the PD controller U2 and the second configuration channel terminal CC2 of the PD controller U2 to the power supply device 80 according to the battery status information. The power supply device 80 outputs the power supply DC to the drain of the fifth field effect transistor M5 according to the target DC power information. The power supply device 80 also outputs a high-level configuration channel signal to the PD controller U2 according to the battery status information. The PD controller U2 has a first configuration channel terminal CC1 and a second configuration channel terminal CC2 of the PD controller U2. In response to the configuration channel signal being at a high level, the PD controller U2 outputs a first switch signal from the third general input and output terminal GPIO3 of the PD controller U2 to the gate of the seventh field effect transistor M7. The seventh field effect transistor M7 is turned on to set the gate of the fifth field effect transistor M5 and the gate of the sixth field effect transistor M6 to a low level, so that the fifth field effect transistor M5 and the sixth field effect transistor M6 are turned on, and the drain of the sixth field effect transistor M6 outputs power supply DC to the battery assembly 91 to charge the battery assembly 91.

[0131] In the first case, the bidirectional DC conversion circuit is connected to the powered device 70. The powered device 70 outputs electrical parameter information to the first configuration channel terminal CC1 of the PD controller U2 and the second configuration channel terminal CC2 of the PD controller U2. The PD controller U2 outputs a regulated voltage from the current source output terminal OPTO of the PD controller U2 to the external feedback terminal FB of the buck controller U1 according to the electrical parameter information. The powered device 70 also outputs a low-level configuration channel signal to the first configuration channel terminal CC1 of the PD controller U2 and the second configuration channel terminal CC2 of the PD controller U2. In response to the configuration channel signal being low, the PD controller U2 outputs an enable signal to the enable terminal EN of the buck controller U1 from the first general purpose input and output terminal GPIO1 of the PD controller U2. The battery assembly 91 outputs the battery voltage, including the buck circuit 031 of the buck controller U1, which bucks the battery voltage based on the adjustment voltage and the enable signal to output the supply voltage to the drain of the fourth field effect transistor M4 and the output voltage terminal VO of the PD controller U2. In response to the supply voltage being in the preset interval, the PD controller U2 outputs a second switching signal from the N-MOSFET control terminal USBP of the PD controller U2 to the gate of the third field effect transistor M3 and the gate of the fourth field effect transistor M4, and the third field effect transistor M3 and the fourth field effect transistor M4 are turned on, and the drain of the third field effect transistor M3 outputs the supply voltage to the powered device 70, so that the powered device 70 is charged and / or operated accordingly.

[0132] An embodiment of the present invention further provides an electronic device, which includes the above-mentioned bidirectional direct current conversion circuit.

[0133] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0134] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A bidirectional DC conversion circuit, characterized in that: connected to an energy storage circuit, the energy storage circuit is used to charge according to the supply DC power or to output the battery voltage; the bidirectional DC conversion circuit includes: A control circuit, configured to access a configuration channel signal, and output a first switch signal in response to the configuration channel signal being at a first level, or output an enable signal in response to the configuration channel signal being at a second level; a first switch circuit, connected to the control circuit and the energy storage circuit, configured to access the power supply DC power and transmit the power supply DC power to the energy storage circuit based on the first switch signal; A voltage transformation circuit is connected to the control circuit and the energy storage circuit, and is used to transform the battery voltage based on the enable signal to output a supply voltage.

2. The bidirectional DC conversion circuit according to claim 1, characterized in that: Connect to power supply equipment; The energy storage circuit is also used to output battery status information; The control circuit is also connected to the power supply device and the energy storage circuit, and is also used to output target DC power information according to the battery status information; The power supply device is used to output the power supply DC power according to the target DC power information.

3. The bidirectional DC conversion circuit according to claim 2, characterized in that: The energy storage circuit comprises: a battery assembly, connected to the voltage conversion circuit and the first switch circuit, and used for charging according to the supply DC power, or for outputting the battery voltage; The battery management circuit is connected to the battery assembly and is used to detect the status of the battery assembly and output the battery status information.

4. The bidirectional DC conversion circuit according to claim 1, characterized in that: Connect with the powered equipment; The powered device is used to output electrical parameter information; The control circuit is also connected to the powered device and is further used to output a regulating voltage and a second switch signal according to the electrical parameter information; a voltage conversion circuit, connected to the control circuit and the energy storage circuit, and configured to convert the battery voltage based on the enable signal, the regulation voltage and the second switch signal to output the supply voltage; The powered device is used to charge and / or operate according to the supply voltage.

5. The bidirectional DC conversion circuit according to claim 4, characterized in that: The voltage conversion circuit includes a step-down circuit and a second switch circuit; The control circuit is specifically used to access the configuration channel signal, output the first switch signal in response to the configuration channel signal being at a first level, output the enable signal in response to the configuration channel signal being at a second level, output the adjustment voltage according to the electrical parameter information, and output the second switch signal in response to the supply voltage being within a preset interval; The step-down circuit is connected to the energy storage circuit and the control circuit, and is used to step down the battery voltage based on the adjustment voltage and the enable signal to output the supply voltage; The second switch circuit is connected to the powered device, the step-down circuit and the control circuit, and is used to transmit the supply voltage to the powered device based on the second switch signal.

6. The bidirectional DC conversion circuit according to claim 5, characterized in that: The buck circuit includes a buck controller, a first field effect transistor, a second field effect transistor, a first diode, a second diode, an inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor; The anode of the first diode constitutes the battery voltage input terminal of the step-down circuit, and is connected to the energy storage circuit and the first switch circuit to access the battery voltage; The cathode of the first diode is connected to the first end of the first resistor and the drain of the first field effect tube, the power supply end of the buck controller is connected to the second end of the first resistor and the first end of the first capacitor, the high-side MOSFET gate drive end of the buck controller is connected to the first end of the second resistor, the second end of the second resistor is connected to the gate of the first field effect tube, the low-side MOSFET gate drive end of the buck controller is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the gate of the second field effect tube, the high-side gate drive bootstrap end of the first field effect tube is connected to the first end of the third resistor and the first end of the fourth capacitor, the second end of the third resistor is connected to the cathode of the second diode, the anode of the second diode is connected to the first power supply, and the second end of the fourth capacitor is connected to the first end of the inductor, the source of the first field effect tube, and the source of the second field effect tube. The drain of the step-down controller, the inductor terminal of the step-down controller and the first end of the fifth resistor are connected, the current protection configuration terminal of the step-down controller is connected to the second end of the fifth resistor and the first end of the fifth capacitor, the internal error amplifier output terminal of the step-down controller is connected to the first end of the sixth resistor and the first end of the sixth capacitor, the second end of the sixth resistor is connected to the first end of the seventh capacitor, the second end of the sixth capacitor is connected to the second end of the seventh capacitor, the first end of the seventh resistor, the first end of the eighth capacitor, the first end of the ninth resistor, the first end of the tenth resistor, and the external feedback terminal of the step-down controller, the second end of the eighth resistor is connected to the second end of the eighth capacitor, and the enable terminal of the step-down controller is connected to the first end of the eleventh resistor; the second end of the first capacitor, the second end of the third capacitor, the second end of the fifth capacitor and the second end of the ninth resistor are connected to the power ground; The second end of the seventh resistor, the first end of the eighth resistor, the first end of the third capacitor and the second end of the inductor are connected and together constitute a power supply voltage output end of the step-down circuit, which is connected to the second switch circuit and the control circuit to output the power supply voltage; The second end of the tenth resistor constitutes the regulated voltage input end of the step-down circuit and is connected to the control circuit to receive the regulated voltage; The second end of the eleventh resistor constitutes an enable signal input end of the buck circuit and is connected to the control circuit to receive the enable signal.

7. The bidirectional DC conversion circuit according to claim 5, characterized in that: The second switch circuit includes a third field effect transistor, a fourth field effect transistor, a twelfth resistor and a thirteenth resistor; The drain of the fourth field effect transistor constitutes the supply voltage input terminal of the second switch circuit, and is connected to the step-down circuit and the control circuit to access the supply voltage; The source of the fourth field effect transistor is connected to the source of the third field effect transistor and the first end of the twelfth resistor, and the gate of the third field effect transistor is connected to the gate of the fourth field effect transistor, the second end of the twelfth resistor and the first end of the thirteenth resistor; The second end of the thirteenth resistor constitutes a second switch signal input end of the second switch circuit, and is connected to the control circuit to receive the second switch signal; The drain of the third field effect transistor constitutes the power supply voltage output terminal of the second switch circuit and is connected to the first switch circuit to output the power supply voltage.

8. The bidirectional DC conversion circuit according to claim 5, characterized in that: The control circuit includes a PD controller and a seventeenth resistor; The N-MOSFET control terminal of the PD controller constitutes the second switch signal output terminal of the control circuit, and is connected to the second switch circuit to output the second switch signal; The output voltage terminal of the PD controller constitutes the supply voltage input terminal of the control circuit, and is connected to the second switch circuit and the step-down circuit to access the supply voltage; The first universal input-output terminal of the PD controller and the first terminal of the seventeenth resistor are connected and together constitute the enable signal output terminal of the control circuit, which is connected to the step-down circuit to output the enable signal; The current source output terminal of the PD controller constitutes the regulated voltage output terminal of the control circuit and is connected to the step-down circuit to output the regulated voltage; The second general input and output terminal of the PD controller constitutes the battery status signal input terminal of the control circuit, and is connected to the energy storage module to access the battery status information; The first configuration channel terminal of the PD controller and the second configuration channel terminal of the PD controller are used together as a target DC power information output terminal of the control circuit, an electrical parameter information input terminal of the control circuit and a configuration channel signal input terminal of the control circuit, so as to access the electrical parameter information and the configuration channel signal and output the target DC power information; The third general input and output terminal of the PD controller constitutes the first switch signal output terminal of the control circuit, and is connected to the first switch circuit to output the first switch signal; The second end of the seventeenth resistor is connected to the signal ground.

9. The bidirectional DC conversion circuit according to any one of claims 1 to 8, characterized in that: The first switch circuit includes a fifth field effect transistor, a sixth field effect transistor, a seventh field effect transistor, a fourteenth resistor, a fifteenth resistor and a sixteenth resistor; The drain of the fifth field effect transistor constitutes the input end of the first switch circuit and is connected to the voltage conversion circuit to access the power supply DC; The drain of the sixth field effect transistor constitutes the output end of the first switch circuit, and is connected to the voltage conversion circuit and the energy storage circuit to output the power supply DC; The source of the fifth field effect transistor is connected to the source of the sixth field effect transistor and the first end of the fourteenth resistor, the gate of the fifth field effect transistor is connected to the second end of the fourteenth resistor, the gate of the sixth field effect transistor and the first end of the fifteenth resistor, the second end of the fifteenth resistor is connected to the drain of the seventh field effect transistor, and the source of the seventh field effect transistor and the first end of the sixteenth resistor are connected to the signal ground; The gate of the seventh field effect transistor and the second end of the sixteenth resistor are connected and together constitute a control end of the first switch circuit, which is connected to the control circuit to receive the first switch signal.

10. An electronic device, characterized in that: The electronic device comprises the bidirectional DC conversion circuit as claimed in any one of claims 1 to 9.

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