Power management device for electronic equipment and electronic equipment

Abstract

The invention provides a power management device for electronic equipment and the electronic equipment. The power management device comprises: a control unit configured to start a pull-up unit and disconnect a power module from a functional module and an electric energy output end in response to determining that a received receiving mode configuration signal meets a predetermined condition; the control unit is further configured to turn off the pull-up unit and connect the power supply module with the functional module and the electric energy output end in response to determining that the electronic equipment is in a predetermined non-working mode and the voltage of the electric energy output end is smaller than a first predetermined voltage; the control end of the pull-up unit is electrically connected with the control unit, the output end of the pull-up unit is electrically connected with the electric energy output end, the pull-up unit is configured to output a voltage signal with a second preset voltage in the starting state, and the second preset voltage is larger than the first preset voltage. According to the device, the electronic equipment can automatically exit the non-working mode, and convenience is provided for a user.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of power management, and more particularly to a power management device for an electronic device and the electronic device. Background Art

[0002] Most portable electronic products are now powered by lithium batteries. Due to the leakage current of components on electronic devices, the power of lithium batteries will be reduced during long-term transportation or storage. When lithium-ion batteries are over-discharged or left empty for a long time, the reversibility of the positive and negative active materials will be destroyed, so it is necessary to minimize the power consumption of lithium batteries during storage and transportation. Therefore, when transporting portable devices using lithium batteries, measures need to be taken to reduce equipment leakage, slow down battery discharge, prevent battery over-discharge, and protect the battery.

[0003] For example, before transportation or storage, the battery is disconnected from the control circuit by additional equipment such as a plastic sheet to prevent discharge, and the switch needs to be closed again before sales. However, this method is cumbersome to operate and is not convenient for users to use the product immediately after receiving it. Summary of the invention

[0004] In view of the above problems, the present disclosure provides a power management device for an electronic device and an electronic device, which can enable the electronic device to automatically exit a non-working mode (such as a transport mode) to provide convenience for users.

[0005] According to the first aspect of the present disclosure, a power management device for an electronic device is provided. The electronic device at least includes a power module, a functional module and an electric energy output terminal, and the power management device includes: a control unit configured to start a pull-up unit in response to determining that the received receiving mode configuration signal meets a predetermined condition and disconnect the power module from the functional module and the electric energy output terminal, and determine that the electronic device is in a predetermined non-working mode; the control unit is also configured to determine that the electronic device exits the predetermined non-working mode in response to determining that the electronic device is in a predetermined non-working mode and the voltage of the electric energy output terminal is less than a first predetermined voltage, and turn off the pull-up unit and connect the power module to the functional module and the electric energy output terminal; and a pull-up unit, the control end of the pull-up unit is electrically connected to the control unit, the output end of the pull-up unit is electrically connected to the electric energy output terminal, and the pull-up unit is configured to output a voltage signal with a second predetermined voltage in the startup state, and the second predetermined voltage is greater than the first predetermined voltage.

[0006] In some embodiments, the device also includes a voltage comparison unit, which includes: a first input terminal, receiving a reference voltage signal having a first predetermined voltage; a second input terminal, electrically connected to the power output terminal; and a comparison output terminal, electrically connected to the control unit; the control unit is also configured to determine whether the voltage of the power output terminal is less than the first predetermined voltage based on the signal from the comparison output terminal.

[0007] In some embodiments, the device also includes an inverter, the input end of the inverter is electrically connected to the power output end, the output end of the inverter is electrically connected to the control unit, and the flipping voltage of the inverter is a first predetermined voltage; the control unit is also configured to determine whether the voltage of the power output end is less than the first predetermined voltage based on a signal from the output end of the inverter.

[0008] In some embodiments, the predetermined non-operating mode is a transport mode, and the control unit is further configured to receive a mode configuration signal and determine whether the mode configuration signal represents the transport mode.

[0009] In some embodiments, the pull-up unit includes: a first MOS tube, a gate of the first MOS tube is electrically connected to one end of the first resistor and is configured as a control end of the pull-up unit, a source of the first MOS tube is electrically connected to a first power supply end, a drain of the first MOS tube is electrically connected to one end of the first resistor, and a voltage of the first power supply end is greater than or equal to a second predetermined voltage; a first resistor, the other end of the first resistor is grounded; a second MOS tube, the drain of the second MOS tube is electrically connected to one end of the first capacitor and is configured as an output end of the pull-up unit, the gate of the second MOS tube is electrically connected to one end of the first resistor, and the source of the second MOS tube is electrically connected to the first power supply end; and a first capacitor, the other end of the first capacitor is grounded.

[0010] In some embodiments, the pull-up unit further includes: a third MOS tube, a gate of the third MOS tube being electrically connected to a drain of the third MOS tube and a drain of the second MOS tube; and a fourth MOS tube, a gate of the fourth MOS tube being electrically connected to a drain of the fourth MOS tube and a source of the third MOS tube, and a source of the fourth MOS tube being grounded; wherein the first MOS tube and the second MOS tube are P-type MOS tubes, and the third MOS tube and the fourth MOS tube are N-type MOS tubes.

[0011] In some embodiments, the pull-up unit further includes: a voltage regulator diode, an anode of the voltage regulator diode is grounded, and a cathode of the voltage regulator diode is electrically connected to a drain of the second MOS tube.

[0012] In some embodiments, the pull-up unit includes: a first operational amplifier, an inverting input terminal of the first operational amplifier receives a reference voltage signal having a second predetermined voltage, a non-inverting input terminal of the first operational amplifier is electrically connected to one end of the second capacitor, and an output terminal of the first operational amplifier is electrically connected to the base of the first transistor; a first transistor, an emitter of the first transistor is electrically connected to one end of the second resistor, a collector of the first transistor is electrically connected to one end of the second capacitor, and is configured as the output terminal of the pull-up unit; a second resistor, the other end of the second resistor is electrically connected to one end of the first switch unit; a first switch unit, the other end of the first switch unit is electrically connected to the first power supply terminal, the control end of the first switch unit is configured as the control end of the pull-up unit, and the voltage of the first power supply terminal is greater than or equal to the second predetermined voltage; and a second capacitor, the other end of the second capacitor is grounded.

[0013] In some embodiments, the pull-up unit includes: a second switch unit, the control end of the second switch unit is configured as the control end of the pull-up unit, the first end of the second switch unit is electrically connected to the first power supply end, the second end of the second switch unit is electrically connected to one end of a third resistor, and the voltage of the first power supply end is greater than or equal to a second predetermined voltage; a third resistor, the other end of the third resistor is electrically connected to one end of a third capacitor; and a third capacitor, the other end of the third capacitor is grounded.

[0014] In some embodiments, the first ratio, the resistance value of the first resistor, the first predetermined voltage and the second predetermined voltage are determined according to the size of the load to be connected to the power output end, and the first ratio is the ratio between the second width-to-length ratio of the conductive channel of the second MOS tube and the first width-to-length ratio of the conductive channel of the first MOS tube.

[0015] In some embodiments, the electronic device includes a power bank.

[0016] According to a second aspect of the present disclosure, an electronic device is provided, which includes a power module, a functional module, an electric energy output terminal, and the device according to the first aspect of the present disclosure.

[0017] According to an embodiment of the present disclosure, an electronic device at least includes a power module, a functional module and an electric energy output terminal, and a power management device includes: a control unit, configured to start a pull-up unit in response to determining that a received receiving mode configuration signal meets a predetermined condition and disconnect the power module from the functional module and the electric energy output terminal, and determine that the electronic device is in a predetermined non-operating mode; the control unit is also configured to determine that the electronic device exits the predetermined non-operating mode in response to determining that the electronic device is in a predetermined non-operating mode and the voltage of the electric energy output terminal is less than a first predetermined voltage, and turn off the pull-up unit and connect the power module to the functional module and the electric energy output terminal; and a pull-up unit, the control end of the pull-up unit is electrically connected to the control unit, the output end of the pull-up unit is electrically connected to the electric energy output terminal, and the pull-up unit is configured to output a voltage signal with a second predetermined voltage in the startup state, and the second predetermined voltage is greater than the first predetermined voltage. Therefore, when the electronic device needs to be stored or transported for a long time, the power module can be disconnected from the functional module to reduce leakage current and protect the battery (power module). When the electronic device is connected to an external load (such as an external power-consuming device), the power management device can automatically control the power module to connect to the functional module so as to restore power supply, which can provide convenience for users.

[0018] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements.

[0020] Figure 1 A block diagram of a power management device for an electronic device according to an embodiment of the present disclosure is shown.

[0021] Figure 2 A waveform diagram of a preset signal according to an embodiment of the present disclosure is shown.

[0022] Figure 3 A schematic diagram of a voltage comparison unit according to an embodiment of the present disclosure is shown.

[0023] Figure 4 A schematic structural diagram of a pull-up unit according to an embodiment of the present disclosure is shown.

[0024] Figure 5 A schematic structural diagram of a pull-up unit according to an embodiment of the present disclosure is shown.

[0025] Figure 6A schematic structural diagram of a pull-up unit according to an embodiment of the present disclosure is shown.

[0026] Figure 7 A schematic structural diagram of a pull-up unit according to an embodiment of the present disclosure is shown.

[0027] Figure 8 A schematic structural diagram of a pull-up unit according to an embodiment of the present disclosure is shown.

[0028] Fig. 9 A schematic diagram of an electronic device of the present disclosure is shown. DETAILED DESCRIPTION

[0029] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0030] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0031] As described above, in order to reduce device leakage, slow down battery discharge, prevent over-discharge and protect batteries when transporting portable devices using lithium batteries, the connection between the battery and the control circuit is cut off by additional equipment such as plastic sheets before transportation or storage to prevent discharge, and the switch needs to be closed again before sales. However, this method is cumbersome to operate and is not convenient for users to use the product immediately after receiving it.

[0032] For example, electronic devices such as portable devices that use lithium batteries include lithium batteries as power sources and power modules (functional modules) powered by lithium batteries. These power modules include, for example, chips and circuits with control functions, chips and circuits for performing specific functions, and so on. For example, an insulating structure such as a plastic sheet can be provided to cut off the connection between the lithium battery and the power module, thereby preventing the power module from obtaining electrical energy from the lithium battery and forming leakage current. Before the user uses the electronic device, the insulating structure is removed to restore the electrical connection between the lithium battery and the power module. Obviously, this method is cumbersome to operate and is not convenient for users to use immediately after receiving the product.

[0033] In order to at least partially solve one or more of the above problems and other potential problems, the present disclosure provides a power management scheme for electronic devices. Wherein, the electronic device at least includes a power module, a functional module and an electric energy output terminal, and the power management device includes: a control unit, configured to start the pull-up unit in response to determining that the received receiving mode configuration signal meets the predetermined condition and disconnect the power module from the functional module and the electric energy output terminal, and determine that the electronic device is in a predetermined non-working mode; the control unit is also configured to determine that the electronic device exits the predetermined non-working mode in response to determining that the electronic device is in a predetermined non-working mode and the voltage of the electric energy output terminal is less than the first predetermined voltage, and turn off the pull-up unit and connect the power module with the functional module and the electric energy output terminal; and a pull-up unit, the control end of the pull-up unit is electrically connected to the control unit, the output end of the pull-up unit is electrically connected to the electric energy output terminal, and the pull-up unit is configured to output a voltage signal with a second predetermined voltage in the startup state, and the second predetermined voltage is greater than the first predetermined voltage. Therefore, when the electronic device needs to be stored or transported for a long time, the power module can be disconnected from the functional module to reduce leakage current and protect the battery (power module). When the electronic device is connected to an external load (such as an external power-consuming device), the power management device can automatically control the power module to connect to the functional module so as to restore power supply, which can provide convenience for users.

[0034] The power management device for electronic devices and the electronic devices according to the embodiments of the present disclosure are described in detail below.

[0035] Figure 1 A block diagram of a power management device 101 for an electronic device according to an embodiment of the present disclosure is shown. The electronic device 102 corresponding to the power management device 101 includes, for example, a power module 121, a functional module 122, and an electric energy output terminal 123. The power module 121 includes, for example, a battery, such as a lithium battery. The functional module 122 includes a chip and a circuit with a control function, a chip and a circuit for performing a specific function, and the like. The electric energy output terminal 123 is, for example, a port of the electronic device 102 for outputting electric energy to an external load 103 (for example, an external electrical device). The electronic device 102 is, for example, a mobile power supply (or "power bank"), and the functional module 122 includes, for example, a chip and / or a circuit for detecting the voltage, power, input (charging) current, and output (discharging) current of the power module 121. The electronic device 102 is, for example, a portable communication device, and the functional module 122 includes, for example, a chip and / or a circuit for performing a communication function.

[0036] The power management device 101 includes, for example, a control unit 111 and a pull-up unit 112. In some embodiments, the power management device 101 further includes a voltage comparison unit 113.

[0037] Regarding the control unit 111, it is configured to start the pull-up unit 112 in response to determining that the received reception mode configuration signal meets the predetermined condition and disconnect the power module 121 from the functional module 122 and the power output terminal 123, and determine that the electronic device 102 is in a predetermined non-operating mode; the control unit 111 is also configured to determine that the electronic device 102 exits the predetermined non-operating mode in response to determining that the electronic device 102 is in a predetermined non-operating mode and the voltage of the power output terminal 123 is less than a first predetermined voltage, and turn off the pull-up unit 112 and connect the power module 121 to the functional module 122 and the power output terminal 123. In some embodiments, the rated output voltage of the power output terminal 123 is, for example, 5V.

[0038] In some embodiments, a switch K1 is provided between the power module 121 and the functional module 122. The control unit 111 controls the on and off of the switch K1, thereby controlling the on and off between the power module 121 and the functional module 122. In the working mode, the power output terminal 123 outputs the power from the power module 121. When the power module 121 and the functional module 122 are disconnected, the power output terminal 123 cannot obtain power from the power module 121.

[0039] Regarding the pull-up unit 112, the control end of the pull-up unit 112 is electrically connected to the control unit 111, the output end of the pull-up unit 112 is electrically connected to the power output end 123, and the pull-up unit 112 is configured to output a voltage signal having a second predetermined voltage in a startup state, and the second predetermined voltage is greater than the first predetermined voltage.

[0040] Therefore, when the control unit 111 responds to determining that the electronic device 102 is in a predetermined non-working mode, starts the pull-up unit 112 and disconnects the power module 121 from the functional module 122, the power output terminal 123 cannot obtain power from the power module 121, and the voltage output by the power output terminal 123 comes from the pull-up unit 112. The voltage output by the power output terminal 123 is, for example, equal to a second predetermined voltage.

[0041] The control unit 111 may be implemented based on, for example, an MCU (microprocessing unit), a CPU (central processing unit), an FPGA (field programmable gate array), or the like.

[0042] In some embodiments, for example, when the power consumption of the electronic device 102 is lower than a predetermined power consumption threshold for a period of time exceeding a predetermined time threshold, it is considered to have entered a predetermined non-working mode.

[0043] In some embodiments, the predetermined non-working mode is, for example, a transport mode. For example, the control unit 111 receives a mode configuration signal and determines whether the mode configuration signal represents a transport mode. If the mode configuration signal represents a transport mode (i.e., the mode configuration signal represents a predetermined non-working mode), the control unit 111 determines that the electronic device 102 is in the predetermined non-working mode, and starts the pull-up unit 112, and disconnects the power module 121 from the functional module 122, and disconnects the power module 121 from the power output terminal 123. Figure 2 The waveform diagram of the preset signal of the embodiment of the present disclosure is shown. Among them, the horizontal axis represents "time" for example, and the vertical axis represents "voltage" for example. The preset signal includes, for example, 4 positive pulses, the pulse width of the first and third positive pulses is, for example, "T1", the pulse width of the second and fourth positive pulses is, for example, "T2", the low level of the pulse signal is, for example, Va, and the high level of the pulse signal is, for example, Vb. The control unit 111 receives a mode configuration signal from the outside based on the universal input and output interface, for example, and determines whether the received mode configuration signal matches the predetermined signal. If the mode configuration signal matches the predetermined signal, the mode configuration signal meets the predetermined condition, and the control unit 111 determines that the electronic device 102 is in a predetermined non-working mode, starts the pull-up unit 112, and disconnects the power module 121 from the functional module 122 and the power output terminal 123. For example, after receiving the mode configuration signal matching the predetermined signal, the control unit 111 sets the identification signal (for example, the identification bit) indicating that the electronic device 102 is in a predetermined non-working mode to a high level. When the control unit 111 determines that the electronic device 102 exits the predetermined non-operating mode, the control unit 111 sets an identification signal (eg, an identification bit) indicating that the electronic device 102 is in the predetermined non-operating mode to a low level.

[0044] For example, the control unit 111 only responds to whether the voltage of the power output terminal 123 is greater than the first predetermined voltage during the period when the electronic device 102 is in a predetermined non-operating mode (for example, the identification signal indicating that the electronic device 102 is in a predetermined non-operating mode is at a high level). However, during the period when the electronic device 102 exits the predetermined non-operating mode (for example, the identification signal indicating that the electronic device 102 is in a predetermined non-operating mode is at a low level), the control unit 111 does not respond to whether the voltage of the power output terminal 123 is greater than the first predetermined voltage. That is, during the period when the electronic device 102 exits the predetermined non-operating mode (for example, the identification signal indicating that the electronic device 102 is in a predetermined non-operating mode is at a low level), the control unit 111 ignores whether the voltage of the power output terminal 123 is greater than the first predetermined voltage, for example, the control unit 111 ignores the comparison result signal output by the voltage comparison unit 113.

[0045] After the power module 121 is disconnected from the functional module 122, the functional module 122 cannot obtain power from the power module 121, no static leakage current is generated, and no power of the functional module 122 is consumed. Therefore, the battery can be effectively protected and over-discharge of the battery can be avoided.

[0046] At this time, due to the action of the pull-up unit 112, the voltage output by the power output terminal 123 is configured to be, for example, a second predetermined voltage (greater than the first predetermined voltage). At this time, the control unit 111 determines that the voltage of the power output terminal 123 is greater than the first predetermined voltage, so the pull-up unit 112 is kept started and the power module 121 is disconnected from the functional module 122. In some embodiments, the second predetermined voltage can be, for example, less than the rated output voltage of the power output terminal 123, so that the static power consumption of the power management device 101 can be significantly reduced.

[0047] When the user uses the electronic device 102 and connects it to the external load 103, the external load 103 obtains power from the power output terminal 123, so the voltage of the power output terminal 123 is pulled down (lower than the first predetermined voltage). Therefore, the control unit 111 determines that the voltage of the power output terminal 123 is less than the first predetermined voltage and turns off the pull-up unit 112 and connects the power module 121 with the functional module 122, connects the power module 121 with the power output terminal 123, and determines that the electronic device exits the predetermined non-working mode (for example, the identification signal (for example, the identification bit) indicating that the electronic device 102 is in the predetermined non-working mode is set to a low level). Therefore, without the user performing targeted operations, the electronic device 102 is automatically switched back to the working mode (that is, exits the predetermined non-working mode). At this time, the power output terminal 123 obtains power from the power module 121 and outputs power to the external load 103. The voltage output by the power output terminal 123, for example, meets the rated voltage. It should be understood that the first predetermined voltage is a reference voltage for determining whether the voltage of the power output terminal 123 is lower than a predetermined level, and the first predetermined voltage can be any value greater than 0 and less than the second predetermined voltage. It is worth noting that when the power output terminal 123 is connected to the external load 103, within a certain period of time, the voltage of the power output terminal 123 is pulled down to close to 0V (less than the first predetermined voltage). Therefore, the control unit 111 determines that the electronic device 102 exits the predetermined non-working mode (for example, the identification signal (for example, the identification bit) indicating that the electronic device 102 is in the predetermined non-working mode is set to a low level). Thereafter, the control unit 111 connects the power module 121 to the functional module 122, and connects the power module 121 to the power output terminal 123. Therefore, the power output terminal 123 outputs electric energy to the external load 103 according to the rated output voltage. Since the control unit 111 determines that the electronic device 102 exits the predetermined non-operating mode (for example, the identification signal (for example, the identification bit) indicating that the electronic device 102 is in the predetermined non-operating mode is set to a low level), even if the voltage of the power output terminal 123 is greater than the first predetermined voltage at this time, the control unit 111 does not respond to this, and still maintains the power module 121 connected to the functional module 122 and the power module 121 connected to the power output terminal 123 until a mode configuration signal matching the predetermined signal is received, and the power module 121 is disconnected from the functional module 122 and the power output terminal 123 again, and it is determined that the electronic device 102 is in the predetermined non-operating mode.

[0048] In some embodiments, the power management device 101 further includes a voltage comparison unit 113 . Figure 3The schematic diagram of the voltage comparison unit 113 of the embodiment of the present disclosure is shown. The voltage comparison unit 113 includes a first input terminal, a second input terminal and a comparison output terminal, wherein the first input terminal receives a reference voltage signal Vref1 having a first predetermined voltage; the second input terminal is electrically connected to the power output terminal 123; and the comparison output terminal is electrically connected to the control unit 111, and is used to output a comparison result signal to the control unit 111. The control unit 111 can determine the magnitude relationship between the voltage output by the power output terminal 123 and the first predetermined voltage according to the comparison result signal of the comparison output terminal.

[0049] In some embodiments, the first input terminal of the voltage comparison unit 113 is a non-inverting input terminal, and the second input terminal is an inverting input terminal. In some embodiments, the first input terminal of the voltage comparison unit 113 is an inverting input terminal, and the second input terminal is a non-inverting input terminal. It should be understood that when the voltage at the non-inverting input terminal of the voltage comparison unit 113 is greater than the voltage at the inverting input terminal, the voltage comparison unit 113 outputs, for example, a high-level comparison result signal; when the voltage at the non-inverting input terminal of the voltage comparison unit 113 is less than the voltage at the inverting input terminal, the voltage comparison unit 113 outputs, for example, a low-level comparison result signal.

[0050] In some embodiments, the voltage comparison unit 113 can be replaced by an inverter, for example, the input end of the inverter is electrically connected to the power output end 123, the output end of the inverter is electrically connected to the control unit, and the flip voltage of the inverter is a first predetermined voltage; the control unit 111 determines whether the voltage of the power output end 123 is less than the first predetermined voltage according to the signal from the output end of the inverter. For example, when the voltage of the power output end 123 is greater than the flip voltage of the inverter, the inverter outputs a low-level signal, and the control unit 111 can determine that the voltage of the power output end 123 is greater than the first predetermined voltage according to the low-level signal output by the output end of the inverter. When the voltage of the power output end 123 is less than the flip voltage of the inverter, the inverter outputs a high-level signal, and the control unit 111 can determine that the voltage of the power output end 123 is less than the first predetermined voltage according to the high-level signal output by the output end of the inverter.

[0051] Figure 4The structure diagram of a pull-up unit 112 of an embodiment of the present disclosure is shown. The pull-up unit 112 includes a first MOS tube M1, a first resistor R1, a second MOS tube M2, and a first capacitor C1. Among them, the gate of the first MOS tube M1 is electrically connected to one end of the first resistor R1, and is configured as the control end of the pull-up unit 112, the source of the first MOS tube M1 is electrically connected to the first power supply end VDD, the drain of the first MOS tube M1 is electrically connected to one end of the first resistor R1, and the voltage of the first power supply end VDD is greater than or equal to the second predetermined voltage; the other end of the first resistor R1 is grounded GND; the drain of the second MOS tube M2 is electrically connected to one end of the first capacitor C1, and is configured as the output end VOUT of the pull-up unit 112, the gate of the second MOS tube M2 is electrically connected to one end of the first resistor R1, and the source of the second MOS tube M2 is electrically connected to the first power supply end VDD; the other end of the first capacitor C1 is grounded GND. The output end VOUT of the pull-up unit 112 is, for example, electrically connected to the power output end 123. It is worth noting that the power output terminal 123 includes a positive terminal and a negative terminal. When the negative terminal of the power output terminal 123 is grounded, the output terminal VOUT of the pull-up unit 112 is electrically connected to the positive terminal of the power output terminal 123.

[0052] For example, the control unit 111 outputs a high-level control signal to the control end of the pull-up unit 112 (the gate of the first MOS tube M1 and the gate of the second MOS tube M2), which can make the first MOS tube M1 and the second MOS tube M2 in the cut-off state, thereby turning off the pull-up unit 112; the control unit 111 outputs a low-level control signal to the control end of the pull-up unit 112 (the gate of the first MOS tube M1 and the gate of the second MOS tube M2), which can make the first MOS tube M1 and the second MOS tube M2 in the on state, thereby starting the pull-up unit 112.

[0053] Figure 4The pull-up unit 112 shown is implemented based on a current mirror, for example. For example, the resistance of the first resistor R1 is R, the voltage of the first power supply terminal VDD is V1, the gate-source voltages of the first MOS tube M1 and the second MOS tube M2 are VGS1 and VGS2 respectively, the channel lengths of the first MOS tube M1 and the second MOS tube M2 are L1 and L2 respectively, the channel widths of the first MOS tube M1 and the second MOS tube M2 are W1 and W2 respectively, and the ratio of the second width-to-length ratio of the conductive channel of the second MOS tube to the first width-to-length ratio of the conductive channel of the first MOS tube (i.e., the first ratio) is defined as: (W2 / L2) / (W1 / L1)=k. Therefore, the pull-up current generated by the pull-up unit 112 is equal to k*(V1-VGS1) / R. When the pull-up unit 112 is activated and the power output terminal 123 (i.e., the output terminal VOUT of the pull-up unit 112) is not connected to the external load 103, the pull-up unit 112 generates a pull-up current to pull up the voltage of the output terminal VOUT of the pull-up unit 112 (i.e., the power output terminal 123) until the power output terminal 123 is configured to be a second predetermined voltage (the second predetermined voltage is, for example, equal to V1-VGS2), and the pull-up current drops to 0.

[0054] At this time, the control unit 111 determines that the voltage of the power output terminal 123 is greater than the first predetermined voltage, and thus continues to start the pull-up unit 112 and disconnects the power module 121 from the functional module 122 .

[0055] When the user uses the electronic device 102 and connects it to the external load 103, the external load 103 obtains electric energy from the electric energy output terminal 123, so the voltage of the electric energy output terminal 123 is pulled down (lower than the first predetermined voltage). Therefore, the control unit 111 determines that the voltage of the electric energy output terminal 123 is less than the first predetermined voltage and turns off the pull-up unit 112 and connects the power module 121 to the functional module 122. Thus, without the user performing targeted operations, the electronic device 102 is automatically switched back to the working mode. At this time, the electric energy output terminal 123 obtains electric energy from the power module 121 and outputs electric energy to the external load 103. The voltage output by the electric energy output terminal 123, for example, meets the rated voltage.

[0056] It is worth noting that the first ratio, the resistance value of the first resistor, the first predetermined voltage and the second predetermined voltage are determined according to the size of the load (external load 103) to be connected to the power output terminal 123. That is, appropriate k, R, the first predetermined voltage and the second predetermined voltage can be set according to the size of the external load 103 in actual use. For example, the smaller the value of the resistance value R of the first resistor, the larger the value of the first ratio k, and the larger the pull-up current. Therefore, the smaller the value of the resistance value R of the first resistor, the larger the value of the first ratio k, and the smaller the value of the first predetermined voltage, the larger the corresponding external load 103.

[0057] Figure 5 The structure diagram of a pull-up unit 112 of an embodiment of the present disclosure is shown. The pull-up unit 112 includes a first MOS tube M1, a first resistor R1, a second MOS tube M2, a first capacitor C1, a third MOS tube M3 and a fourth MOS tube M4. Among them, the gate of the first MOS tube M1 is electrically connected to one end of the first resistor R1, and is configured as the control end of the pull-up unit 112, the source of the first MOS tube M1 is electrically connected to the first power supply end VDD, the drain of the first MOS tube M1 is electrically connected to one end of the first resistor R1, and the voltage of the first power supply end VDD is greater than or equal to the second predetermined voltage; the other end of the first resistor R1 is grounded GND; the drain of the second MOS tube M2 is electrically connected to one end of the first capacitor C1, and is configured as the output end VOUT of the pull-up unit 112, the gate of the second MOS tube M2 is electrically connected to one end of the first resistor R1, and the source of the second MOS tube M2 is electrically connected to the first power supply end VDD; the other end of the first capacitor C1 is grounded GND. The output terminal VOUT of the pull-up unit 112 is, for example, electrically connected to the power output terminal 123. It is worth noting that the power output terminal 123 includes, for example, a positive terminal and a negative terminal. When the negative terminal of the power output terminal 123 is grounded, the output terminal VOUT of the pull-up unit 112 is, for example, electrically connected to the positive terminal of the power output terminal 123. The gate of the third MOS tube M3 is electrically connected to the drain of the third MOS tube M3 and the drain of the second MOS tube M2; the gate of the fourth MOS tube M4 is electrically connected to the drain of the fourth MOS tube M4 and the source of the third MOS tube M3, and the source of the fourth MOS tube M4 is grounded; wherein the first MOS tube M1 and the second MOS tube M2 are P-type MOS tubes, and the third MOS tube M3 and the fourth MOS tube M4 are N-type MOS tubes.

[0058] It is worth noting that in Figure 4 Based on the pull-up unit 112 shown, Figure 5The pull-up unit 112 shown in the figure is added with a third MOS transistor M3 and a fourth MOS transistor M4, which are used to clamp the voltage of the output terminal VOUT of the pull-up unit 112. For example, the resistance of the first resistor R1 is R, the voltage of the first power supply terminal VDD is V1, the gate-source voltages of the first MOS transistor M1 and the second MOS transistor M2 are VGS1 and VGS2 respectively, the channel lengths of the first MOS transistor M1 and the second MOS transistor M2 are L1 and L2 respectively, the channel widths of the first MOS transistor M1 and the second MOS transistor M2 are W1 and W2 respectively, and the ratio of the second width-to-length ratio of the conductive channel of the second MOS transistor to the first width-to-length ratio of the conductive channel of the first MOS transistor (i.e., the first ratio) is defined as: (W2 / L2) / (W1 / L1)=k. Therefore, the pull-up current generated by the pull-up unit 112 is equal to k*(V1-VGS1) / R. The gate-source voltages of the third MOS transistor M3 and the fourth MOS transistor M4 are VGS3 and VGS4 respectively. When the pull-up unit 112 is activated and the power output terminal 123 (i.e., the output terminal VOUT of the pull-up unit 112) is not connected to the external load 103, the pull-up unit 112 generates a pull-up current, and the pull-up current flows through the third MOS transistor M3 and the fourth MOS transistor M4, and finally the voltage of the output terminal VOUT of the pull-up unit 112 is clamped at VGS3+VGS4. Figure 5 The pull-up unit 112 shown is suitable for application scenarios where the rated voltage of the power output terminal 123 is less than VGS3+VGS4 during normal operation (ie, working mode).

[0059] Figure 6 The structure diagram of a pull-up unit 112 of an embodiment of the present disclosure is shown. The pull-up unit 112 includes a first MOS tube M1, a first resistor R1, a second MOS tube M2, a first capacitor C1 and a voltage stabilizing diode Z1. Among them, the gate of the first MOS tube M1 is electrically connected to one end of the first resistor R1, and is configured as the control end of the pull-up unit 112, the source of the first MOS tube M1 is electrically connected to the first power supply end VDD, the drain of the first MOS tube M1 is electrically connected to one end of the first resistor R1, and the voltage of the first power supply end VDD is greater than or equal to the second predetermined voltage; the other end of the first resistor R1 is grounded GND; the drain of the second MOS tube M2 is electrically connected to one end of the first capacitor C1, and is configured as the output end VOUT of the pull-up unit 112, the gate of the second MOS tube M2 is electrically connected to one end of the first resistor R1, and the source of the second MOS tube M2 is electrically connected to the first power supply end VDD; the other end of the first capacitor C1 is grounded GND. The positive electrode of the voltage zener diode Z1 is grounded GND, and the negative electrode of the voltage zener diode is electrically connected to the drain of the second MOS tube.

[0060] It is worth noting that in Figure 4 Based on the pull-up unit 112 shown, Figure 6The pull-up unit 112 shown in the figure is added with a voltage regulator diode Z1 for clamping the voltage of the output terminal VOUT of the pull-up unit 112. For example, the resistance of the first resistor R1 is R, the voltage of the first power supply terminal VDD is V1, the gate-source voltages of the first MOS transistor M1 and the second MOS transistor M2 are VGS1 and VGS2 respectively, the channel lengths of the first MOS transistor M1 and the second MOS transistor M2 are L1 and L2 respectively, the channel widths of the first MOS transistor M1 and the second MOS transistor M2 are W1 and W2 respectively, and the ratio of the second width-to-length ratio of the conductive channel of the second MOS transistor to the first width-to-length ratio of the conductive channel of the first MOS transistor (i.e., the first ratio) is defined as: (W2 / L2) / (W1 / L1)=k. Therefore, the pull-up current generated by the pull-up unit 112 is equal to k*(V1-VGS1) / R. The reverse breakdown voltage of the voltage regulator diode Z1 is V2. When the pull-up unit 112 is started and the power output terminal 123 (i.e., the output terminal VOUT of the pull-up unit 112) is not connected to the external load 103, the pull-up unit 112 generates a pull-up current, so that the voltage of the output terminal VOUT of the pull-up unit 112 (i.e., the power output terminal 123) is pulled up until the Zener diode Z1 breaks down in reverse, thereby clamping the voltage of the output terminal VOUT of the pull-up unit 112 at the reverse breakdown voltage V2 of the Zener diode Z1. Figure 6 The pull-up unit 112 shown is suitable for application scenarios where the rated voltage of the power output terminal 123 is less than the reverse breakdown voltage V2 of the Zener diode Z1 during normal operation (ie, working mode).

[0061] Figure 7 The schematic diagram of the structure of a pull-up unit 112 of an embodiment of the present disclosure is shown. The pull-up unit 112 comprises a first operational amplifier U1, a first transistor B1, a second resistor R2, and a second capacitor C2. The inverting input terminal of the first operational amplifier U1 receives a reference voltage signal Vref2 having a second predetermined voltage, the non-inverting input terminal of the first operational amplifier U1 is electrically connected to one end of the second capacitor C2, and the output terminal of the first operational amplifier U1 is electrically connected to the base of the first transistor B1; the emitter of the first transistor B1 is electrically connected to one end of the second resistor R2, the collector of the first transistor B1 is electrically connected to one end of the second capacitor C2, and is configured as the output terminal VOUT of the pull-up unit 112; the other end of the second resistor R2 is electrically connected to one end of the first switch unit K3; the other end of the first switch unit K3 is electrically connected to the first power supply terminal VDD, and the control terminal of the first switch unit K3 is configured as the control terminal of the pull-up unit 112; the other end of the second capacitor C2 is grounded GND.

[0062] The control unit 111 controls the first switch unit K3 to be turned on, so as to start the pull-up unit 112 ; the control unit 111 controls the first switch unit K3 to be turned off, so as to turn off the pull-up unit 112 .

[0063] Figure 7 The pull-up unit 112 shown is an output pull-up circuit implemented based on an amplifier. For example, the resistance of the first resistor R1 is R, the voltage of the first power supply terminal VDD is V1, and the voltage of the output terminal VOUT of the pull-up unit 112 is V2, then the pull-up current generated is approximately equal to (V1-V2) / R. The smaller the resistance R of the first resistor R1, the larger the pull-up current generated by the pull-up unit 112, and the stronger the pull-up capability. When the pull-up unit 112 is started and the power output terminal 123 (that is, the output terminal VOUT of the pull-up unit 112) is not connected to the external load 103, the first operational amplifier U1 maintains the voltage of the output terminal VOUT of the pull-up unit 112 at Vref2. When the power output terminal 123 is connected to the external load 103, when the load current is greater than the maximum pull-up current that the pull-up circuit can provide, the voltage of the power output terminal 123 drops. When the voltage of the power output terminal 123 drops below the first predetermined voltage, the control unit 111 turns off the pull-up unit 112 and connects the power module 121 to the functional module 122 .

[0064] Figure 8 A structural schematic diagram of a pull-up unit 112 of an embodiment of the present disclosure is shown. The pull-up unit 112 includes a second switch unit K2, a third resistor R3, and a third capacitor C3. The control end of the second switch unit K2 is configured as the control end of the pull-up unit 112, the first end of the second switch unit K2 is electrically connected to the first power supply terminal VDD, the second end of the second switch unit K2 is electrically connected to one end of the third resistor R3, the voltage of the first power supply terminal VDD is greater than or equal to the second predetermined voltage; the other end of the third resistor R3 is electrically connected to one end of the third capacitor C3; the other end of the third capacitor C3 is grounded GND.

[0065] It is worth mentioning that Figure 8 The pull-up unit 112 shown is an output pull-up circuit implemented based on a resistor. For example, the resistance of the first resistor R1 is R, the voltage of the first power supply terminal VDD is V1, and the voltage of the output terminal VOUT of the pull-up unit 112 is V2, then the generated pull-up current is approximately equal to (V1-V2) / R. When the pull-up unit 112 is started, and the power output terminal 123 (that is, the output terminal VOUT of the pull-up unit 112) is not connected to the external load 103, the pull-up unit 112 generates a pull-up current, and the pull-up current pulls up the voltage of the output terminal VOUT of the pull-up unit 112 until the voltage of the output terminal VOUT of the pull-up unit 112 is equal to the voltage of the first power supply terminal VDD (the voltage of the first power supply terminal VDD is, for example, equal to the second predetermined voltage), and the pull-up current drops to 0.

[0066] It is worth noting that the power management device 101 can be powered by the power module 121 or by another power source. It should be understood that the static leakage current of the power management device 101 is significantly smaller than the static leakage current of the functional module 122 .

[0067] Fig. 9 The schematic diagram of the electronic device 900 of the present disclosure is shown. The electronic device 900 includes a power module 121, a functional module 122, an electric energy output terminal 123, and a power management device 101 for an electronic device of an embodiment of the present disclosure. The electronic device 900 is, for example, a mobile power supply, a portable communication device, etc. The functions of each unit and module of the electronic device 900 can be referred to the above, and will not be repeated here.

[0068] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

[0069] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A power management device for electronic equipment, characterized in that: The electronic device at least includes a power module, a functional module and an electric energy output terminal, and the power management device includes: A control unit configured to start the pull-up unit and disconnect the power module from the functional module and the power output terminal in response to determining that the received reception mode configuration signal meets a predetermined condition, and determine that the electronic device is in a predetermined non-operating mode; the control unit is further configured to determine that the electronic device exits the predetermined non-operating mode in response to determining that the electronic device is in the predetermined non-operating mode and the voltage at the power output terminal is less than a first predetermined voltage, and turn off the pull-up unit and connect the power module to the functional module and the power output terminal; and A pull-up unit, wherein the control end of the pull-up unit is electrically connected to the control unit, the output end of the pull-up unit is electrically connected to the power output end, and the pull-up unit is configured to output a voltage signal having a second predetermined voltage in a startup state, and the second predetermined voltage is greater than the first predetermined voltage.

2. The power management device according to claim 1, wherein: It also includes a voltage comparison unit, the voltage comparison unit includes: A first input terminal receives a reference voltage signal having a first predetermined voltage; a second input terminal electrically connected to the power output terminal; and A comparison output terminal electrically connected to the control unit; The control unit is further configured to determine whether the voltage of the power output terminal is less than a first predetermined voltage according to the signal from the comparison output terminal.

3. The power management device according to claim 1, wherein: It also includes an inverter, the input end of the inverter is electrically connected to the power output end, the output end of the inverter is electrically connected to the control unit, and the flip voltage of the inverter is a first predetermined voltage; The control unit is further configured to determine whether the voltage at the power output terminal is less than a first predetermined voltage according to a signal from the output terminal of the inverter.

4. The power management device according to claim 1, wherein: The pull-up unit includes: a first MOS transistor, wherein a gate of the first MOS transistor is electrically connected to one end of the first resistor and is configured as a control end of the pull-up unit, a source of the first MOS transistor is electrically connected to the first power supply end, a drain of the first MOS transistor is electrically connected to one end of the first resistor, and a voltage of the first power supply end is greater than or equal to a second predetermined voltage; a first resistor, the other end of which is grounded; a second MOS transistor, wherein the drain of the second MOS transistor is electrically connected to one end of the first capacitor and is configured as the output end of the pull-up unit, the gate of the second MOS transistor is electrically connected to one end of the first resistor, and the source of the second MOS transistor is electrically connected to the first power supply end; and The first capacitor has the other end grounded.

5. The power management device according to claim 4, wherein: The pull-up unit also includes: a third MOS tube, wherein the gate of the third MOS tube is electrically connected to the drain of the third MOS tube and the drain of the second MOS tube; and a fourth MOS tube, wherein a gate of the fourth MOS tube is electrically connected to a drain of the fourth MOS tube and a source of the third MOS tube, and the source of the fourth MOS tube is grounded; The first MOS tube and the second MOS tube are P-type MOS tubes, and the third MOS tube and the fourth MOS tube are N-type MOS tubes.

6. The power management device according to claim 4, characterized in that: The pull-up unit also includes: A voltage stabilizing diode, wherein the positive electrode of the voltage stabilizing diode is grounded, and the negative electrode of the voltage stabilizing diode is electrically connected to the drain of the second MOS tube.

7. The power management device according to claim 1, wherein: The pull-up unit includes: a first operational amplifier, wherein an inverting input terminal of the first operational amplifier receives a reference voltage signal having a second predetermined voltage, a non-inverting input terminal of the first operational amplifier is electrically connected to one end of the second capacitor, and an output terminal of the first operational amplifier is electrically connected to a base of the first transistor; a first triode, wherein the emitter of the first triode is electrically connected to one end of the second resistor, the collector of the first triode is electrically connected to one end of the second capacitor, and is configured as an output end of the pull-up unit; a second resistor, the other end of the second resistor being electrically connected to one end of the first switch unit; a first switch unit, the other end of the first switch unit is electrically connected to the first power supply end, the control end of the first switch unit is configured as the control end of the pull-up unit, and the voltage of the first power supply end is greater than or equal to the second predetermined voltage; and The second capacitor has the other end grounded.

8. The power management device according to claim 1, wherein: The pull-up unit includes: a second switch unit, wherein a control end of the second switch unit is configured as a control end of the pull-up unit, a first end of the second switch unit is electrically connected to the first power supply end, a second end of the second switch unit is electrically connected to one end of the third resistor, and a voltage of the first power supply end is greater than or equal to a second predetermined voltage; a third resistor, the other end of the third resistor being electrically connected to one end of the third capacitor; and The third capacitor has the other end grounded.

9. The power management device according to claim 4, characterized in that: The first ratio, the resistance value of the first resistor, the first predetermined voltage and the second predetermined voltage are determined according to the size of the load to be connected to the power output end, and the first ratio is the ratio between the second width-to-length ratio of the conductive channel of the second MOS tube and the first width-to-length ratio of the conductive channel of the first MOS tube.

10. The power management device according to claim 1, wherein: The electronic device includes a mobile power source.

11. An electronic device, characterized in that: It comprises a power module, a functional module, an electric energy output terminal and a power management device as claimed in any one of claims 1 to 10.

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