Memory card power supply unit and electronic device

Abstract

The present invention discloses a memory card power supply device and electronic device, wherein the memory card power supply device includes a power supply module for converting a preset voltage into the voltage required by the memory card; a first switch module having a first input terminal, a second output terminal, and a first detection control terminal, wherein the first input terminal is connected to the first output terminal, and the second output terminal is connected to the memory card power supply terminal; a second switch module having a second input terminal, a third output terminal, and a second detection control terminal, wherein the second input terminal is connected to the first output terminal, and the third output terminal is connected to the memory card power supply terminal; and a control module connected to the first detection control terminal and the second detection control terminal, respectively, for obtaining a level signal from the first detection control terminal and a level signal from the second detection control terminal, and controlling the first switch module or the second switch module based on the level signal. The memory card power supply device according to the present invention is compatible with two application schemes and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a memory card power supply device and electronic equipment. Background Art

[0002] High-speed memory cards offer fast read and write speeds and are primarily used in applications requiring high-speed read and write speeds, such as photo and video capture. However, conventional power supplies for high-speed memory cards typically utilize high-efficiency logic schemes, which are incompatible with low-efficiency logic circuits and therefore have limited application. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a memory card power supply device that is compatible with both high-active logic and low-active logic power supply application schemes and has a wide range of applications.

[0004] A second object of the present invention is to provide an electronic device.

[0005] In order to solve the above problems, an embodiment of the first aspect of the present invention proposes a memory card power supply device, including: a power supply module, used to convert a preset voltage into a voltage required by the memory card, the power supply module having a first output end, and the first output end being used to output the voltage required by the memory card; a first switch module, the first switch module having a first input end, a second output end, and a first detection control end, wherein the first input end is connected to the first output end, and the second output end is connected to the memory card power supply end; a second switch module, the second switch module having a second input end, a third output end, and a second detection control end, wherein the second input end is connected to the first output end, and the third output end is connected to the memory card power supply end; a control module, the control module being connected to the first detection control end and the second detection control end, respectively, and being used to obtain a level signal of the first detection control end and a level signal of the second detection control end, and outputting a high-effective logic signal to control the first switch module or outputting a low-effective logic signal to control the second switch module according to the level signal.

[0006] According to the memory card power supply device of the embodiment of the present invention, by providing a first switch module and a second switch module, a control module is connected to the first detection control end of a switch module and the second detection control end of the second switch module, respectively. The control module selectively controls the conduction of the power-on path where the first switch module or the second switch module is located according to the level signal of the first detection control end and the level signal of the second detection control end, wherein a high-effective logic signal is output to control the first switch module or a low-effective logic signal is output to control the second switch module. Compared with only adopting a high-effective logic solution, the memory card power supply device of the embodiment of the present invention adds state detection of the level signal of the switch module, and is compatible with both high-effective logic and low-effective logic power supply application solutions of the memory card power supply. It has a wide range of applications and meets the diverse needs of production and life.

[0007] In some embodiments of the present invention, the first switch module includes: a first detection unit, wherein the first end of the first detection unit is connected to the first output end; a first switch unit, wherein the first end of the first switch unit is connected to the first output end, the second end of the first switch unit is connected together with the second end of the first detection unit and serves as the first detection control end, and the third end of the first switch unit is connected to the power supply end of the memory card.

[0008] After the memory card power supply device is powered on, when a high-effective logic solution is needed to power the memory card, the first detection control end outputs a low-level signal, the first detection control module receives the low-level signal, and the control module sends a control signal to the first detection control end according to the low-level signal. The first switch unit responds and turns on, thereby controlling the power supply module to turn on the power path of the memory card through the first switch module, thereby realizing the use of a high-effective logic solution to power the memory card.

[0009] In some embodiments of the present invention, the first detection unit includes: a first resistor, a first end of the first resistor is connected to the first output end, and a second end of the first resistor is connected to the second end of the first switch unit and the control module respectively.

[0010] In some embodiments of the present invention, the first switch unit includes: a second resistor, wherein a first end of the second resistor is connected to the second end of the first resistor and the control module respectively; a transistor, wherein a control end of the transistor is connected to the second end of the second resistor, and a first end of the transistor is grounded; a first MOS transistor, wherein a first end of the first MOS transistor is connected to the first output end, and a second end of the first MOS transistor is connected to the power supply end of the memory card; a third resistor, wherein a first end of the third resistor is connected to the first output end, and a second end of the third resistor is connected to the second end of the transistor; and a fourth resistor, wherein a first end of the fourth resistor is connected to the second end of the third resistor and the second end of the transistor, and a second end of the fourth resistor is connected to the power supply end of the memory card. a first capacitor, wherein the first end of the first capacitor is connected to the first output end and the first end of the first MOS transistor respectively, and the second end of the first capacitor is connected to the second end of the fourth resistor and the control end of the first MOS transistor; a fifth resistor, wherein the first end of the fifth resistor is connected to the first output end, and the second end of the fifth resistor is connected to the second end of the first MOS transistor; a second capacitor, wherein the first end of the second capacitor is connected to the second end of the first MOS transistor and the power supply end of the memory card respectively, and the second end of the second capacitor is grounded; and a sixth resistor, wherein the first end of the sixth resistor is connected to the second end of the first MOS transistor and the power supply end of the memory card respectively, and the second end of the sixth resistor is grounded.

[0011] In some embodiments of the present invention, the second switch module includes: a second detection unit, a first end of the second detection unit is connected to the first output end; a second switch unit, a first end of the second switch unit is connected to the first output end, a second end of the second switch unit is connected together with the second end of the second detection unit and serves as the second detection control end, and a third end of the second switch unit is connected to the memory card power supply end.

[0012] After the memory card power supply device is powered on, when a low-active logic scheme is required to power the memory card, the second detection control terminal outputs a high-level signal, the second detection control module receives the high-level signal, and the control module sends a control signal to the second detection control terminal based on the high-level signal. The second switch unit responds and turns on, thereby controlling the power supply module to turn on the power path of the memory card through the second switch module, thereby realizing the use of a low-active logic scheme to power the memory card.

[0013] In some embodiments of the present invention, the second detection unit includes: a seventh resistor, a first end of the seventh resistor is connected to the first output end, a second end of the seventh resistor is connected to the control module, and a resistance of the seventh resistor is greater than a resistance of the first resistor.

[0014] In some embodiments of the present invention, the second switch unit includes: a second MOS transistor, a first end of the second MOS transistor being connected to the first output end, and a second end of the second MOS transistor being connected to the memory card power supply end; an eighth resistor, a first end of the eighth resistor being connected to the second end of the seventh resistor and the control module, respectively, and a second end of the eighth resistor being connected to the control end of the second MOS transistor; a third capacitor, a first end of the third capacitor being connected to the first output end and the first end of the second MOS transistor, and a second end of the third capacitor being connected to the second end of the eighth resistor and the control end of the second MOS transistor; a ninth resistor, a first end of the ninth resistor being connected to the first output end, and a second end of the ninth resistor being connected to the second end of the second MOS transistor; a fourth capacitor, a first end of the fourth capacitor being connected to the second end of the second MOS transistor, and a second end of the fourth capacitor being grounded; and a tenth resistor, a first end of the tenth resistor being connected to the memory card power supply end and the second end of the second MOS transistor, respectively, and a second end of the tenth resistor being grounded.

[0015] In some embodiments of the present invention, when the control module determines that the level signal is a low level, it outputs a first switch logic signal to control the conduction or cutoff of the first MOS tube; when the control module determines that the level signal is a high level, it outputs a second switch logic signal to control the conduction or cutoff of the second MOS tube; wherein the first switch logic signal is a high-effective logic signal, and the second switch logic signal is a low-effective logic signal.

[0016] The first switch logic signal is set to be different from the second switch logic signal. The control module 4 selectively controls the first switch module or the second switch module to be turned on according to the detected high-effective logic signal or low-effective logic signal, and can be compatible with both high-effective logic and low-effective logic power supply application schemes.

[0017] In order to achieve the above-mentioned purpose, the electronic device provided in the second embodiment of the present invention includes: a device body, a memory card installation portion is provided on the device body, and a memory card power supply terminal is provided at the memory card installation portion; the memory card power supply device described in any of the above embodiments, the memory card power supply device is connected to the memory card power supply terminal.

[0018] According to an electronic device of an embodiment of the present invention, by adopting the memory card power supply device of any of the above embodiments, a first switch module and a second switch module are set between the power module and the memory card installation part, and a control module is set to detect the level signal of the first detection control end and the level signal of the second detection control end, and can selectively control the power path where the first switch module or the second switch module is located to be conductive according to the detected level signal. It can be compatible with both high-effective logic and low-effective logic power supply application schemes, has a wide range of applications, and meets the diverse needs of production and life.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0021] Figure 1 is a block diagram of a memory card power supply device according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a power module according to an embodiment of the present invention;

[0023] Figure 3 is a block diagram of a memory card power supply device according to another embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of a first switch module according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of a memory card power supply device according to another embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of a second switch module according to an embodiment of the present invention;

[0027] Figure 7 is a block diagram of an electronic device according to an embodiment of the present invention;

[0028] Figure 8 FIG. 1 is a schematic diagram of a memory card installation portion according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] electronic device 10;

[0031] Memory card power supply unit 01, memory card 02, device body 03, memory card installation part 04;

[0032] Power module 1, first switch module 2, second switch module 3, control module 4;

[0033] A first detection unit 21, a first switch unit 22, a second detection unit 31, and a second switch unit 32;

[0034] 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, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a transistor Q1, a first MOS transistor N1, a second MOS transistor N2, and a chip U. DETAILED DESCRIPTION

[0035] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0036] Reference below Figures 1-6 A memory card power supply device according to an embodiment of the present invention is described.

[0037] Figure 1 FIG. 1 is a block diagram of a memory card power supply device according to an embodiment of the present invention.

[0038] In some embodiments of the present invention, Figure 1 As shown, the memory card power supply device 01 includes a power supply module 1 , a first switch module 2 , a second switch module 3 and a control module 4 .

[0039] The power module 1 is used to convert the preset voltage into the voltage required by the memory card 02. Figure 2 , which is a schematic diagram of a power module according to some embodiments of the present invention, wherein the power module 1 has a first output terminal, which is used to output the voltage required by the memory card 02. The VDDAD_3V3 port is the first output terminal, which is the power supply terminal of the memory card 02. That is, the voltage required by the memory card 02 is 3.3V. The memory card 02 may include an SD (Secure Digital) card, a TF (Transflash, Multimedia) card, etc. The power module 1 can be connected to a 12V power supply to convert the 12V power supply voltage into the 3.3V voltage required by the memory card 02. Specifically, the power module 1 can be composed of a chip U, a plurality of capacitors and resistors. The chip U is an example of a SOT23_6 chip. A program is stored in the chip U. After the power module 1 is connected to the 12V power supply, the program in the chip U runs, so that the 12V voltage can be converted into 3.3V electricity after passing through the plurality of capacitors and resistors, and is output from the first output terminal VDDAD_3V3 port.

[0040] In some embodiments of the present invention, Figure 1As shown, the first switch module 2 has a first input terminal, a second output terminal, and a first detection control terminal. The first switch module 2 can be a high-effective logic circuit module, that is, when a high-effective logic signal is input, the first switch module 2 is turned on and can provide the required voltage for powering the memory card 02.

[0041] A high-active logic signal is one that can be recognized and responded to by a high-active logic circuit. Once the high-active logic signal is recognized by the first switch module 2, the first switch module 2 is turned on. The first input terminal of the first switch module 2 is connected to the first output terminal, and the second output terminal is connected to the power supply terminal of the memory card 02. The first switch module 2 receives the 3.3V voltage output by the first output terminal. After the memory card power supply device 01 is powered on, the power module 1 supplies power to the memory card 02 through the first switch module 2. The first detection control terminal can be a port capable of bidirectional communication, capable of both detecting level signals and receiving control signals. For example, after the memory card power supply device 01 is powered on, the module connected to the first detection control terminal of the first switch module 2 can receive a detection signal, such as a level signal. The first switch module 2 can also receive a control signal, such as an on / off signal, through the first detection control terminal, and the first switch module 2 can operate in response to the control signal. The first switch module 2 is positioned between the power module 1 and the power supply terminal of the memory card 02, and the first detection control terminal is provided to selectively control the on / off state of the first switch module 2, achieving high-active control of the power supply path of the memory card 02.

[0042] In some embodiments of the present invention, Figure 1 As shown, the second switch module 3 has a second input terminal, a third output terminal, and a second detection control terminal. The second input terminal is connected to the first output terminal, and the third output terminal is connected to the power supply terminal of the memory card 02. The second switch module 3 is different from the first switch module 2. The second switch module 3 can be a low-active logic circuit module. When receiving a low-active logic signal, the second switch module 3 is turned on and can provide the required voltage for powering the memory card 02.

[0043] The low-active logic signal is recognized and responded to by the low-active logic circuit. After the low-active logic signal is recognized by the second switch module 3, the second switch module 3 is turned on. The second input terminal is connected to the first output terminal, and the third output terminal is connected to the power supply terminal of the memory card 02. The second switch module 3 can obtain the 3.3V voltage output by the first output terminal. After the memory card power supply device 01 is powered on, the power module 1 can supply power to the memory card 02 through the second switch module 3. The second detection control terminal can be a port capable of bidirectional communication, capable of both detecting level signals and receiving control signals. For example, after the memory card power supply device 01 is powered on, the module connected to the second detection control terminal of the second switch module 3 can obtain a detection signal such as a level signal. The second switch module 3 can also obtain a control signal such as an on or off signal through the second detection control terminal, and the second switch module 3 can operate in response to the control signal. The second switch module 3 is disposed between the power module 1 and the power supply terminal of the memory card 02, and the first detection control terminal is provided to selectively control the conduction or off-state of the second switch module 3, thereby achieving low-active control of the power supply path of the memory card 02.

[0044] In some embodiments of the present invention, Figure 1 As shown, the control module 4 is connected to the first detection control end and the second detection control end respectively, and is used to obtain the level signal of the first detection control end and the level signal of the second detection control end, and output a high-effective logic signal to control the first switch module 2 or output a low-effective logic signal to control the second switch module 3 according to the level signal. For example, the control module 4 can send an on or off control signal to the corresponding detection control end, so as to selectively control the power path where the first switch module 2 or the second switch module 3 is located to be on or off, so as to achieve compatibility with both high-effective logic and low-effective logic power supply application solutions.

[0045] For example, when the control module 4 detects that the first detection control terminal is at a low level, it issues a high-active logic signal to control the first switch module 2 to be turned on, so that the power module 1 supplies power to the memory card 02 via the first switch module 2. For another example, when the control module 4 detects that the second detection control terminal is at a high level, it issues a low-active logic signal to control the second switch module 3 to be turned on, so that the power module 1 supplies power to the memory card 02 via the second switch module 3, thereby achieving both high-active and low-active power supply modes for the memory card 02.

[0046] According to the memory card power supply device 01 of the embodiment of the present invention, by setting a first switch module 2 and a second switch module 3, a control module 4 is set to be connected to the first detection control end of the switch module 2 and the second detection control end of the second switch module 3, respectively. The control module 4 can detect the level signal of the first detection control end and the level signal of the second detection control end, and can selectively control the power path where the first switch module 2 or the second switch module 3 is located to be turned on according to the detected level signal, wherein a high-effective logic signal is output to control the first switch module or a low-effective logic signal is output to control the second switch module. Compared with only adopting a high-effective logic solution, the memory card power supply device 01 of the embodiment of the present invention adds state detection of the level signal of the switch module, and can be compatible with both high-effective logic and low-effective logic power supply application solutions of the memory card 02 power supply. It has a wide range of applications and meets the diverse needs of production and life.

[0047] Figure 3 is a block diagram of a memory card power supply device according to another embodiment of the present invention.

[0048] In some embodiments of the present invention, Figure 3 As shown, the first switch module 2 includes a first detection unit 21 and a first switch unit 22 .

[0049] The first terminal of the first detection unit 21 is connected to the first output terminal. The first detection unit 21 is used to detect the level signal output by the first switch module 2. Alternatively, the first detection unit 21 can also work together with the control module 4 to control the first detection control terminal of the first switch module 2 to output a low-level signal.

[0050] The first end of the first switch unit 22 is connected to the first output end, and the second end of the first switch unit 22 is connected to the second end of the first detection unit 21 and serves as the first detection control end. The first detection control end can be a port capable of bidirectional communication, capable of both outputting level signals and receiving control signals. For example, the control module 4 can obtain a level signal at the first detection control end, and the first switch module 2 can also obtain a control signal such as an on or off signal through the first detection control end. The third end of the first switch unit 22 is connected to the power supply end of the memory card 02. The third end of the first switch unit 22, i.e., the second output end of the first switch module 2, is connected to the power supply end of the memory card 02 and is used to power the memory card 02 after the first switch unit 22 is turned on.

[0051] like Figure 4FIG. 2 is a schematic diagram of a first switch module according to an embodiment of the present invention, wherein the first detection unit 21 includes a first resistor R1, wherein a first end of the first resistor R1 is connected to the first output end. Specifically, the first end of the first resistor R1 is connected to the first output end via the first input end of the first switch module 2. The first input end of the first switch module 2 is VDDAD_3V3, and the power supply module 1 supplies power to the first resistor R1 via the first output end.

[0052] The second end of the first resistor R1 is connected to the second end of the first switch unit 22 and the control module 4 respectively.

[0053] The second end of the first resistor R1 is connected to the second end of the first switch unit 22, that is, the second end of the first detection unit 21 is connected to the second end of the first switch unit 22 as a first detection control end, for example Figure 4 The SDPWR_EN port is the first detection control port. Control module 4 detects the level signal output by first switch module 2 via the SDPWR_EN port and issues a control signal based on the detected level signal. The second end of first resistor R1 is connected to control module 4. First resistor R1 has a resistance of 4.7k ohms. When a high-level logic circuit is required to power memory card 02, first resistor R1 and the built-in pull-up resistor of control module 4 work together to limit the output of a low-level signal from the first detection control port. Control module 4 detects the low-level signal from the first detection control port and outputs a high-level logic signal to turn on first switch unit 22, thereby implementing a high-level logic scheme to power memory card 02.

[0054] In some embodiments of the present invention, Figure 4 As shown, the first switch unit 22 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first MOS transistor N1, a first capacitor C1, a second capacitor C2 and a third capacitor C3.

[0055] Among them, the SD_3V3 port is the third end of the first switch unit 22, that is, the second output end of the first switch module 2. The SD_3V3 port of the first switch unit 22 is connected to the power supply end of the memory card 02, and is used to power the memory card 02 after the first switch unit 22 is turned on.

[0056] The first end of the second resistor R2 is connected to the second end of the first resistor R1 and the control module 4, respectively. The control end of the transistor Q1 is connected to the second end of the second resistor R2, and the first end of the transistor Q1 is grounded. The first end of the first MOS transistor N1 is connected to the first output end, and the second end of the first MOS transistor N1 is connected to the power supply end of the memory card O2. The first MOS transistor N1 can function as an electronic switch. For example, when the first MOS transistor N1 is turned on, the first switch module 2 is turned on, allowing the power module 1 to supply power to the memory card O2 via the first switch module 2. The first end of the third resistor R3 is connected to the first output end, and the second end of the third resistor R3 is connected to the second end of the transistor Q1. The first end of the fourth resistor R4 is connected to the second end of the third resistor R3 and the second end of the transistor Q1, and the second end of the fourth resistor R4 is connected to the control end of the first MOS transistor N1. The first end of the first capacitor C1 is connected to the first output end and the first end of the first MOS transistor N1, respectively, and the second end of the first capacitor C1 is connected to the second end of the fourth resistor R4 and the control end of the first MOS transistor N1. A first end of a fifth resistor R5 is connected to the first output terminal, and a second end of the fifth resistor R5 is connected to the second end of the first MOS transistor N1. A first end of a second capacitor C2 is connected to the second end of the first MOS transistor N1 and the power supply terminal of the memory card O2, respectively. A second end of the second capacitor C2 is grounded. A first end of a sixth resistor R6 is connected to the second end of the first MOS transistor N1 and the power supply terminal of the memory card O2, respectively. A second end of the sixth resistor R6 is grounded.

[0057] In some embodiments of the present invention, when the memory card power supply device 01 is powered on, a high-effective logic scheme is required to power the memory card 02. The control module 4 and the first resistor R1 group work together to control the first detection control terminal to output a low-level signal. The control module 4 sends a conduction signal to the first detection control terminal based on the low-level signal. The first MOS transistor N1 can respond to the conduction signal and further control the power supply module 1 to conduct the power path of the memory card 02 through the first switch module 2, thereby realizing the use of a high-effective logic scheme to power the memory card 02.

[0058] Figure 5 FIG1 is a block diagram of a memory card power supply device according to an embodiment of the present invention.

[0059] In some embodiments of the present invention, Figure 5 As shown, the second switch module 3 includes a second detection unit 31 and a second switch unit 32 .

[0060] The first end of the second detection unit 31 is connected to the first output end. The second detection unit 31 is used to detect the level signal output by the second switch module 3, or the second detection unit 31 can also work together with the control module 4 to control the second detection control end of the second switch module 3 to output a fixed level signal.

[0061] The first end of the second switch unit 32 is connected to the first output end, and the second end of the second switch unit 32 is connected to the second end of the second detection unit 31 and serves as the second detection control end. The second detection control end can be a port capable of bidirectional communication, capable of both outputting level signals and receiving control signals. For example, the control module 4 can obtain a level signal at the second detection control end, and the second switch module 3 can also obtain a control signal such as an on or off signal through the second detection control end. The third end of the second switch unit 32 is connected to the power supply end of the memory card 02. The third end of the second switch unit 32, i.e., the third output end of the second switch module 3, is connected to the power supply end of the memory card 02 and is used to power the memory card 02 after the second switch unit 32 is turned on.

[0062] like Figure 6 FIG. 1 is a schematic diagram of a second detection unit according to an embodiment of the present invention. The second detection unit 31 includes a seventh resistor R7, the first end of which is connected to the first output end. Specifically, the first end of the seventh resistor R7 is connected to the first output end via the second input end of the second switch module 3. The second input end of the second switch module 3 is VDDAD_3V3, and the power supply module 1 supplies power to the seventh resistor R7 via the first output end.

[0063] The second end of the seventh resistor R7 is connected to the control module 4. The resistance of the seventh resistor R7 is 470k ohms, which is greater than the resistance of the first resistor R1. When a low-effective logic circuit is required to power the memory card 02, the seventh resistor R7 and the built-in pull-up resistor of the control module 4 work together to limit the second detection control end to output a high-level signal. The control module 4 detects the high-level signal of the second detection control port and outputs a low-effective logic signal to control the second switch unit 32 to turn on, thereby realizing the use of a low-effective logic scheme to power the memory card 02.

[0064] The second end of the seventh resistor R7 is also connected to the second end of the second switch unit 32, that is, the second end of the second detection port unit 31 is connected to the second end of the second switch unit 32 as the second detection control end, and the SDPWR_EN port is the second detection control end. The control module 4 can detect the level signal output by the second switch module 3 at the SDPWR_EN port, and can also send a control signal according to the detected level signal.

[0065] In some embodiments of the present invention, Figure 6 As shown, the second switch unit 32 includes a second MOS transistor N2, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a ninth resistor R9 and a tenth resistor R10.

[0066] Among them, the SD_3V3 port is the third end of the second switch unit 32, that is, the third output end of the second switch module 3. The SD_3V3 port of the second switch unit 32 is connected to the power supply end of the memory card 02, and is used to power the memory card 02 after the second switch unit 32 is turned on.

[0067] The first end of the second MOS transistor N2 is connected to the first output terminal, and the second end of the second MOS transistor N2 is connected to the power supply terminal of the memory card O2. The second MOS transistor N2 can function as an electronic switch. For example, when the second MOS transistor N2 is turned on, the second switch module 3 is turned on, allowing the power module 1 to supply power to the memory card O2 via the second switch module 3. The first end of the eighth resistor R8 is connected to the second end of the seventh resistor R7 and the control module 4, respectively. The second end of the eighth resistor R8 is connected to the control terminal of the second MOS transistor N2. The first end of the third capacitor C3 is connected to the first output terminal and the first end of the second MOS transistor N2. The second end of the third capacitor C3 is connected to the second end of the eighth resistor R8 and the control terminal of the second MOS transistor N2. The first end of the ninth resistor R9 is connected to the first output terminal, and the second end of the ninth resistor R9 is connected to the second end of the second MOS transistor N2. The first end of the fourth capacitor C4 is connected to the second end of the second MOS transistor N2, and the second end of the fourth capacitor C4 is grounded. The first end of the tenth resistor R10 is connected to the power supply terminal of the memory card O2 and the second end of the second MOS transistor N2, respectively. The second end of the tenth resistor R10 is grounded.

[0068] In some embodiments of the present invention, the second switch module 3 includes one fewer transistor and two fewer resistors than the first switch module 2, and the resistance of the seventh resistor R7 is set to be greater than that of the first resistor R1, thereby enabling the first detection control terminal and the second detection control terminal to output different level signals. By providing the second switch module 3, after the memory card power supply device 01 is powered on, when a low-active logic scheme is required to power the memory card 02, the control module 4 and the seventh resistor R7 work together to control the second detection control terminal to output a high-level signal. The control module 4 sends a control signal to the second detection control terminal based on the high-level signal, and the first MOS transistor N1 can respond with a conduction signal, thereby achieving low-active control of the power supply path of the memory card 02, thereby achieving low-active logic power supply for the memory card 02.

[0069] In some embodiments of the present invention, the memory card power supply device 01 is provided with a first switch module 2 and a second switch module 3, and the control module 4 can selectively control the power path of the first switch module 2 or the second switch module 3 according to the level signal of the detected first detection control end and the level signal of the second detection control end. It can be compatible with both high-effective logic and low-effective logic application schemes, has a wide range of applications, and meets the diverse needs of production and life.

[0070] In some embodiments of the present invention, if the control module 4 determines that the level signal is a low level, it outputs a first switching logic signal to control the conduction or cutoff of the first MOS transistor N1. If the control module 4 determines that the level signal is a high level, it outputs a second switching logic signal to control the conduction or cutoff of the second MOS transistor N2. The first switching logic signal is an active-high logic signal, and the second switching logic signal is an active-low logic signal.

[0071] For example, a high-active logic signal can be a turn-on signal for the first MOS transistor N1, which can only be responded to by the first switch module 2, thereby controlling the first MOS transistor N1 to be turned on, thereby enabling the power module 1 to supply power to the memory card 02 via the first switch module 2. A low-active logic signal can be a turn-on signal for the second MOS transistor N2, which can only be responded to by the second switch module 3, thereby controlling the second MOS transistor N2 to be turned on, thereby enabling the power module 1 to supply power to the memory card 02 via the second switch module 3. The control module 4 cannot simultaneously issue the first switch logic signal and the second switch logic signal, that is, the first MOS transistor N1 and the second MOS transistor N2 cannot be turned on at the same time. This allows the control module 4 to selectively control the first switch module 2 or the second switch module 3 to be turned on based on the detected high-active logic signal or low-active logic signal, thereby achieving compatible power supply application solutions with both high-active logic and low-active logic.

[0072] Figure 7 is a block diagram of an electronic device according to an embodiment of the present invention.

[0073] In some embodiments of the present invention, Figure 7 As shown, the electronic device 10 includes a device body 03, a memory card installation portion 04, and a memory card power supply device 01 according to any one of the above embodiments.

[0074] like Figure 8 , which is a schematic diagram of a memory card installation portion according to an embodiment of the present invention. The memory card installation portion 04 is provided on the device body 03 and is used to install and fix the memory card 02. Taking a TF card as an example, the memory card 02 is fixed in the memory card installation portion 04 and can be installed and removed as needed. A power supply terminal for the memory card 02 is provided at the memory card installation portion 04. The SD_3V3 port is the power supply terminal for the memory card 02 and is used to provide a 3.3V voltage to the memory card 02. When the memory card 02 is inserted into the memory card installation portion 04, the power module 1 supplies power to the memory card 02 via the SD_3V3 port.

[0075] The memory card power supply device 01 is connected to the power supply terminal of the memory card 02. Specifically, the SD_3V3 port of the memory card installation portion 04 is connected to the SD_3V3 port of the first switch module 2 and the SD_3V3 port of the second switch module 3, respectively. When the first switch module 2 or the second switch module 3 is turned on, it can provide power to the memory card 02.

[0076] According to the electronic device 10 of the embodiment of the present invention, by adopting the memory card power supply device 01 of any of the above embodiments, a first switch module 2 and a second switch module 3 are set between the power module 1 and the memory card installation part 04, and a control module 4 is set to detect the level signal of the first detection control end and the level signal of the second detection control end, and can selectively control the power path where the first switch module 2 or the second switch module 3 is located to be turned on according to the detected level signal. It can be compatible with both high-effective logic and low-effective logic power supply application schemes, has a wide range of applications, and meets the diverse needs of production and life.

[0077] Other structures and operations of the electronic device 10 according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0078] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0079] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A memory card power supply device, characterized in that: include: A power module, configured to convert a preset voltage into a voltage required by the memory card, wherein the power module has a first output terminal, and the first output terminal is configured to output the voltage required by the memory card; A first switch module, the first switch module having a first input end, a second output end, and a first detection control end, wherein the first input end is connected to the first output end, and the second output end is connected to the power supply end of the memory card; a second switch module, the second switch module having a second input terminal, a third output terminal, and a second detection control terminal, wherein the second input terminal is connected to the first output terminal, and the third output terminal is connected to the memory card power supply terminal; a control module, the control module being connected to the first detection control end and the second detection control end, respectively, and being configured to obtain a level signal from the first detection control end and a level signal from the second detection control end, and outputting a high-effective logic signal to control the first switch module or a low-effective logic signal to control the second switch module according to the level signals; Wherein, the first switch module includes: a first detection unit, wherein a first end of the first detection unit is connected to the first output end, the first detection unit comprises a first resistor, a first end of the first resistor is connected to the first output end, and a second end of the first resistor is connected to the second end of the first switch unit and the control module, respectively; A first switch unit, wherein the first end of the first switch unit is connected to the first output end, the second end of the first switch unit is connected to the second end of the first detection unit and serves as the first detection control end, and the third end of the first switch unit is connected to the power supply end of the memory card.

2. The memory card power supply device according to claim 1, wherein: The first switch unit includes: a second resistor, wherein a first end of the second resistor is connected to the second end of the first resistor and the control module respectively; a triode, wherein a control end of the triode is connected to the second end of the second resistor, and a first end of the triode is grounded; a first MOS transistor, wherein a first end of the first MOS transistor is connected to the first output end, and a second end of the first MOS transistor is connected to the power supply end of the memory card; a third resistor, wherein a first end of the third resistor is connected to the first output end, and a second end of the third resistor is connected to the second end of the transistor; a fourth resistor, wherein a first end of the fourth resistor is connected to the second end of the third resistor and the second end of the transistor, and a second end of the fourth resistor is connected to the control end of the first MOS transistor; a first capacitor, wherein a first end of the first capacitor is connected to the first output end and the first end of the first MOS transistor respectively, and a second end of the first capacitor is connected to the second end of the fourth resistor and the control end of the first MOS transistor; a fifth resistor, wherein a first end of the fifth resistor is connected to the first output end, and a second end of the fifth resistor is connected to the second end of the first MOS transistor; a second capacitor, wherein a first end of the second capacitor is connected to the second end of the first MOS transistor and the power supply end of the memory card, respectively, and a second end of the second capacitor is grounded; a sixth resistor, wherein a first end of the sixth resistor is connected to the second end of the first MOS transistor and the power supply end of the memory card respectively, and a second end of the sixth resistor is grounded.

3. The memory card power supply device according to claim 2, wherein: The second switch module includes: a second detection unit, wherein a first end of the second detection unit is connected to the first output end; A second switch unit, wherein the first end of the second switch unit is connected to the first output end, the second end of the second switch unit is connected to the second end of the second detection unit and serves as the second detection control end, and the third end of the second switch unit is connected to the power supply end of the memory card.

4. The memory card power supply device according to claim 3, wherein: The second detection unit includes: a seventh resistor, wherein a first end of the seventh resistor is connected to the first output end, a second end of the seventh resistor is connected to the control module, and a resistance value of the seventh resistor is greater than a resistance value of the first resistor.

5. The memory card power supply device according to claim 4, wherein: The second switch unit includes: a second MOS transistor, wherein a first end of the second MOS transistor is connected to the first output end, and a second end of the second MOS transistor is connected to the power supply end of the memory card; an eighth resistor, wherein a first end of the eighth resistor is connected to the second end of the seventh resistor and the control module respectively, and a second end of the eighth resistor is connected to the control end of the second MOS transistor; a third capacitor, wherein a first end of the third capacitor is connected to the first output end and the first end of the second MOS transistor, and a second end of the third capacitor is connected to the second end of the eighth resistor and the control end of the second MOS transistor; a ninth resistor, wherein a first end of the ninth resistor is connected to the first output end, and a second end of the ninth resistor is connected to the second end of the second MOS transistor; a fourth capacitor, wherein a first end of the fourth capacitor is connected to the second end of the second MOS transistor, and a second end of the fourth capacitor is grounded; A tenth resistor, wherein a first end of the tenth resistor is connected to the memory card power supply end and the second end of the second MOS transistor respectively, and a second end of the tenth resistor is grounded.

6. The memory card power supply device according to claim 5, wherein: The control module determines that the level signal is a low level, and then outputs a first switch logic signal to control the conduction or cutoff of the first MOS tube; The control module determines that the level signal is a high level, and then outputs a second switch logic signal to control the conduction or cutoff of the second MOS tube; The first switch logic signal is a high-effective logic signal, and the second switch logic signal is a low-effective logic signal.

7. An electronic device, characterized in that: include: A device body, wherein the device body is provided with a memory card installation portion, and the memory card installation portion is provided with a memory card power supply terminal; The memory card power supply device according to any one of claims 1 to 6, wherein the memory card power supply device is connected to the memory card power supply terminal.

Images