Power path management circuit and electronic equipment

Abstract

The utility model provides a power path management circuit and an electronic device, and relates to the technical field of circuits, and the power path management circuit comprises a comparator and a power path management unit. Through the first level signal output by the output end of the comparator, the power supply path management unit is connected with the external power supply and the power supply system, the external power supply accessed through the external connector supplies power to the power supply system of the electronic equipment and charges the battery at the same time, and when the external connector of the electronic equipment is connected with the external power supply, the battery can be charged. The effects of simultaneously using the electronic equipment and charging the battery are achieved, and the use experience of a user can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit technical field especially relates to a power path management circuit and electronic equipment. BACKGROUND

[0002] The power supply source of electronic equipment when working usually has two kinds, one is through the battery of electronic equipment self -supporting power supply, another is through external power supply. The mode that electronic equipment connects external power supply mainly includes wired and wireless. Among them, electronic equipment can be configured with universal serial bus (Universal Serial Bus, USB) interface, DC JACK interface and the like wired interface, to be connected with external power supply through data line.

[0003] As Figure 1 The prior art, electronic equipment is configured with external connector, external connector is used for connecting with external power supply, and is connected with battery through battery charge and discharge management unit, and the battery is connected with the power system of electronic equipment.

[0004] However, when the external connector of electronic equipment is connected with external power supply, the electronic equipment cannot be used simultaneously and the battery is charged, and only two choices between charging the battery and using the electronic equipment, it is more inconvenient, and affects the use experience of the user. UTILITY MODEL CONTENTS

[0005] The utility model provides a power path management circuit and electronic equipment to solve the defects in the prior art.

[0006] The utility model provides a power path management circuit, which comprises a comparator and a power path management unit.

[0007] The positive input end of the comparator is connected with the external connector of the electronic equipment; the external connector is used for connecting external power supply, and is connected with the battery of the electronic equipment through the battery charge and discharge management unit; the battery charge and discharge management unit is configured to charge and discharge the battery.

[0008] The inverting input end of the comparator is used for connecting with target power supply.

[0009] The comparator is configured to compare the first input of the positive input end with the second input of the inverting input end, and output a first level signal when the first input is higher than the second input.

[0010] The power path management unit is connected with the battery, the external connector, the output end of the comparator and the power system of the electronic equipment respectively.

[0011] The power path management unit is configured to connect the external connector and the power system when the output end of the comparator outputs the first level signal.

[0012] The comparator is further configured to output a second level signal when the first input is lower than the second input.

[0013] The first level signal is higher than the second level signal.

[0014] The power path management unit is further configured to connect the battery and the power system when the output end of the comparator outputs the second level signal.

[0015] The battery charging and discharging management unit comprises a battery charging chip.

[0016] The power path management circuit further comprises a first voltage dividing circuit.

[0017] The external connector is connected with the positive input end through the first voltage dividing circuit.

[0018] The power path management circuit further comprises a second voltage dividing circuit.

[0019] The inverting input end is connected with the target power supply through the second voltage dividing circuit.

[0020] The power path management circuit further comprises a pull-up resistor.

[0021] The output end of the comparator is connected with the target power supply through the pull-up resistor.

[0022] The target power supply is a normal power supply of the electronic device.

[0023] The external connector comprises a wireless connector and a wired connector.

[0024] The input voltage of the wired connector is determined based on a charging protocol.

[0025] The utility model further provides an electronic equipment, include: power system, battery charging and discharging management unit, battery, external connector and above-mentioned power path management circuit.

[0026] The power path management circuit and the electronic equipment provided by the utility model, the power path management circuit includes comparator and power path management unit. The first level signal outputted through the output end of the comparator makes the power path management unit connect the external power supply and the power system, the external power supply accessed through the external connector supplies power for the power system of the electronic equipment, and charges the battery, and the effect that the electronic equipment is used and the battery is charged at the same time can be achieved when the external connector of the electronic equipment is connected with the external power supply, and the use experience of the user can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the utility model or the related art, the following will briefly introduce the drawings needed to be used in the embodiment or the related art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of these drawings.

[0028] Figure 1 It is the structural diagram of the prior power path management circuit.

[0029] Figure 2 It is one of the connection structure schematic diagram of the power path management circuit in the electronic equipment provided by the utility model.

[0030] Figure 3 It is the second connection structure schematic diagram of the power path management circuit in the electronic equipment provided by the utility model.

[0031] Figure 4 It is the external connection relationship schematic diagram of the wired connector J1 in the power path management circuit provided by the utility model.

[0032] Figure 5 It is the external connection relationship schematic diagram of the wireless connector J2 in the power path management circuit provided by the utility model.

[0033] Figure 6 It is the external connection relationship schematic diagram of the battery charging chip in the power path management circuit provided by the utility model.

[0034] Figure 7 It is the external connection relationship schematic diagram of the comparator in the power path management circuit provided by the utility model.

[0035] Figure 8 It is one of the structural schematic diagram of the first management unit in the power path management circuit provided by the utility model.

[0036] Figure 9 It is the second structural schematic diagram of the first management unit in the power path management circuit provided by the utility model.

[0037] Figure 10 is a structural schematic view of the second management unit in the power path management circuit provided by the utility model.

[0038] Figure 11 is a structural schematic view of the second management unit in the power path management circuit provided by the utility model. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below by combining with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0040] Figure 2 is a structural schematic view of the power path management circuit provided in the embodiments of the utility model, as shown in the figure, the power path management circuit comprises a comparator 111 and a power path management unit 112. Figure 2

[0041] The positive input end of the comparator 111 is connected with the external connector 113 of the electronic device; the external connector 113 is used for accessing the external power supply 114, and is connected with the battery 115 of the electronic device through the battery charging and discharging management unit 118. The battery charging and discharging management unit 118 is configured to charge and discharge the battery 115.

[0042] The inverting input end of the comparator 111 is used for being connected with the target power supply 116.

[0043] The comparator 111 is configured to compare the first input of the positive input end with the second input of the inverting input end, and output the first level signal when determining that the first input is higher than the second input.

[0044] The power path management unit 112 is connected with the battery 115, the external connector 113, the output end of the comparator 111 and the power system 117 of the electronic device respectively.

[0045] The power path management unit 112 is configured to connect the external connector 113 with the power system 117 when the output end of the comparator 111 outputs the first level signal.

[0046] ​In detail, the electronic device can include an external connector 113, a battery 115, and a power supply system 117, and the external connector 113 can access an external power supply 114 through a charging circuit board. The external connector 113 can include a wired connector and a wireless connector, and the wired connector can include at least one of a Type-C connector and a DC JACK connector.

[0047] The charging circuit board can include a wired charging circuit board and a wireless charging circuit board, and the wired charging circuit board can be provided with a first connector connected to the wired connector and a second connector accessing the external power supply 114, and the wireless charging circuit board can be provided with a third connector connected to the wireless connector and a fourth connector accessing the external power supply 114. Here, the wired connector and the wireless connector can both be used to access the external power supply 114, and the fourth connector can be a wireless charging coil.

[0048] The wired connector and the wireless connector can both be connected to the battery 115 to charge the battery 115 through the external power supply 114. The battery 115 can be a three-section lithium battery, and the battery signal VBAT of the battery 115 can be 12.6V after being fully charged by the external power supply 114.

[0049] The electronic device can further include a master control system, and the master control system and the power supply system are both integrated on a mainboard of the electronic device. The power supply system 117 can include a direct current conversion circuit for converting a received voltage signal into a voltage signal required by the master control system of the electronic device.

[0050] In the power supply path management circuit provided in the embodiment of the utility model, the comparator 111 includes a positive input end (+), a negative input end (-), and an output end, the positive input end of the comparator 111 is connected with the external connector 113 of the electronic device, and the first input of the positive input end can be the output of the wired connector or the output of the wireless connector.

[0051] The negative input end of the comparator 111 is used to be connected with a target power supply 116, and the second input of the negative input end can be a voltage signal generated by the target power supply 116. The target power supply 116 can be an external power supply or a normal power supply of the electronic device, can generate a 3.3V voltage signal, or can generate a voltage signal with other values, which is not limited here.

[0052] The comparator 111 can compare the first input of the positive input end with the second input of the negative input end, and output a first level signal when the first input is higher than the second input. The first level signal can be a high level signal.

[0053] The power path management unit 112 can be connected with the battery 115, the external connector 113, the output end of the comparator 111 and the power system 117 of the electronic device respectively.

[0054] When the external connector 113 of the electronic device is not connected with the external power source 114, the first input is empty, at this time, the battery 115 is connected with the power system 117, and the power system 117 is powered by the battery 115.

[0055] When the external connector 113 of the electronic device is connected with the external power source 114, the first level signal output by the output end of the comparator 111 can be used as an enable signal of the power path management unit 112, triggering the power path management unit 112 to switch the connection between the battery 115 and the power system 117 to the connection between the external connector 113 and the power system 117, and the power system 117 is powered by the external power source 114 connected through the external connector 113. At the same time, the battery 115 can be charged by the external power source 114.

[0056] It can be understood that the power path management unit 112 can include a switching switch, which can be triggered by the first level signal output by the output end of the comparator 111 to switch the connection relationship between the power system 117 and the external connector 113 and the battery 115.

[0057] The power path management circuit provided in the embodiment of the utility model, including comparator and power path management unit. Through the first level signal output by the output end of the comparator, the power path management unit connects the external power source and the power system, and the external power source connected through the external connector is used to power the power system of the electronic device, and the battery is charged at the same time. When the external connector of the electronic device is connected with the external power source, the effect of using the electronic device and charging the battery at the same time can be achieved, and the use experience of the user can be improved.

[0058] On the basis of the above embodiment, the power path management unit 112 can include a first management unit 121 and a second management unit 122.

[0059] As shown in Figure 3 The non-inverting input end of the comparator 111 is connected with the external connector 113 of the electronic device; the external connector 113 is used for connecting the external power source 114 and is connected with the battery 115 of the electronic device;

[0060] The inverting input end of the comparator 111 is used for connecting with the target power source 116;

[0061] The comparator 111 is configured to compare the first input of the non-inverting input end with the second input of the inverting input end, and output the first level signal when the first input is higher than the second input.

[0062] The first management unit 121 is connected with the output end of the comparator 111, the external connector 113 and the power system 117 of the electronic device respectively; the first management unit 121 is configured to establish the connection relationship between the external connector 113 and the power system 117 when the output end of the comparator 111 outputs the first level signal.

[0063] The second management unit 122 is connected with the output end of the comparator 111, the battery 115 and the power system 117 of the electronic device respectively; the second management unit 122 is configured to disconnect the connection relationship between the battery 115 and the power system 117 when the output end of the comparator 111 outputs the first level signal.

[0064] Specifically, the first management unit 121 and the second management unit 122 can both be switching switches; the first management unit 121 controls the on-off of the path between the external connector 113 and the power system 117, and the second management unit 122 controls the on-off of the path between the battery 115 and the power system 117. When the output signal of the output end of the comparator 111 is the first level signal, the first management unit 121 controls the path between the external connector 113 and the power system 117 to be on, and the second management unit 122 controls the path between the battery 115 and the power system 117 to be off.

[0065] The power path management circuit provided in the embodiment of the utility model, including comparator and power path management unit. Through the first level signal of the output end of comparator, make first management unit establish the connection relationship between external connector and power system, make second management unit disconnect the connection relationship between battery and power system, through the external power supply of external connector access to the power system of electronic device power supply, charge battery simultaneously, can reach the effect that use electronic device and charge battery simultaneously when the external power supply of electronic device external connector is connected, can promote the use experience of user.

[0066] In the above embodiment, the comparator is further configured to output a second level signal when the first input is lower than the second input;

[0067] The first level signal is higher than the second level signal;

[0068] The power path management unit is further configured to connect the battery and the power system when the output end of the comparator outputs the second level signal.

[0069] Specifically, when the external connector 113 of the electronic device is connected to the external power supply 114, the first input is not empty, and when the first input is lower than the second input, the output signal of the output end of the comparator 111 is a second level signal, which can be lower than the first level signal, i.e., the second level signal can be a low level signal.

[0070] The power path management unit can also connect the battery 115 and the power system 117 when the output end of the comparator 111 outputs the second level signal. At this time, the power system 117 is powered by the battery 115, and the battery 115 is charged by the external power supply 114.

[0071] On the basis of the above embodiment, the comparator is further configured to determine that the first input is lower than the second input, and output a second level signal;

[0072] The first level signal is higher than the second level signal;

[0073] The first management unit is further configured to determine that the output end of the comparator outputs the second level signal, and disconnect the connection relationship between the external connector and the power system;

[0074] The second management unit is further configured to determine that the output end of the comparator outputs the second level signal, and establish the connection relationship between the battery and the power system.

[0075] Specifically, when the output signal of the output end of the comparator 111 is the second level signal, the first management unit 121 controls the disconnection of the path between the external connector 113 and the power system 117, and the second management unit 122 controls the conduction of the path between the battery 115 and the power system 117. At this time, the power system 117 is powered by the battery 115, and the battery 115 is charged by the external power supply 114.

[0076] On the basis of the above embodiment, the external connector 113 includes a wired connector J1 and a wireless connector J2; the input voltage of the wired connector J1 is determined based on a charging protocol.

[0077] Specifically, Figure 4 The external connection relationship diagram of the wired connector J1. As Figure 4As shown, pin 1 on the wired connector J1 accesses the normal power supply of the electronic device, which is a 3.3V power supply. Pin 4 can transmit a transmit signal X3M_UART0_TXD to the host system, and pin 5 can receive a feedback signal X3M_UART0_RXD transmitted by the host system. Pin 7 is a data negative signal line (USB_DM) interface, and pin 8 is a data positive signal line (USB_DP) interface, which can be connected to the data negative signal line interface and the data positive signal line interface of the battery discharge chip U1 in the battery charge and discharge management unit 118, respectively. Pins 4, 5, 7, and 8 are also grounded through static protection diodes, respectively.

[0078] Pins 6, 9, 10, 16, and 17 are all grounded. Pin 11 is grounded through capacitor C5, pin 12 is grounded through capacitor C4, and pin 13 is grounded through capacitor C3. Among them, the capacitance values of capacitors C3, C4, and C5 can be 100nF, 10uF, and 10uF, respectively.

[0079] Furthermore, pins 11 and 12 access the wired power signal VBUS provided by the external power supply, which can be a 12V voltage signal or a 5V voltage signal. Pin 12 accesses the target power signal VDD provided by the target power supply, which can be a 3.3V voltage signal. Pin 14 is used to send a first charging indicator light signal Charge_LED_1 to the host system, and pin 15 is used to send a second charging indicator light signal Charge_LED_2 to the host system.

[0080] The input voltage of the wired connector is obtained through the output voltage of the first connector on the wired charging circuit board. The input voltage of the second connector on the wired charging circuit board will obtain different output voltages through the first connector according to whether the battery charging chip matches the PD protocol / QC protocol with the charging adapter. When the protocols do not match, the output voltage of the first connector and the input voltage of the wired connector are both 5V, and when the protocols match, the output voltage of the first connector and the input voltage of the wired connector are both 12V.

[0081] Figure 5 The external connection relationship diagram of the wireless connector J2 is shown in Figure 8. Figure 5 As shown, pins 1 and 2 on the wireless connector J2 access the wireless power signal Wireless provided by the external power supply, which can be a 12V voltage signal. Furthermore, pin 1 is grounded through capacitor C26, and pin 2 is grounded through capacitor C27. Among them, the capacitance values of capacitors C26 and C27 can be 10uF and 10uF, respectively.

[0082] The pins 3, 4, 9, 10 on the wireless connector J2 are all grounded. The pin 6 is a serial data interface for transmitting a serial data signal Simu_I2C_SDA, and the pin 7 is a serial clock interface for transmitting a serial clock signal Simu_I2C_SCL. The pins 6, 7 can be respectively connected to a serial data interface and a serial clock signal of a battery discharge chip U1 in the battery charge and discharge management unit 118.

[0083] On the basis of the above embodiment, the battery charge and discharge management unit 118 can include a battery charging chip. The external connection relationship of the battery charging chip U1 is as shown in Figure 6 The pins 1, 2, 3, 9, 10, 22, 23, 24, 26, 31, 33 on the battery charging chip U1 are all grounded. The pins 4, 5 are connected to a charging signal VCC_Charge_Input and grounded through the parallel connection of capacitors C6, C7, C8. The pins 4, 5 are also grounded through resistors R1, R4. The pin 6 is connected between the resistors R1, R4. The pin 7 is connected to the base of a transistor Q1 through a resistor R6, the emitter of the transistor Q1 is connected to a 3.3V target power supply. The collector of the transistor Q1 is connected to the main control system for transmitting a charging status signal Charge_Status to the main control system, and the collector of the transistor Q1 is also grounded through a resistor R9. Here, the capacitance values of the capacitors C6, C7, C8 can be 22uF, 1uF, and 10nF respectively, and the resistance values of the resistors R1, R4, R6, R9 can be 300KΩ, 100KΩ, 1KΩ, and 10KΩ respectively.

[0084] The pin 8 can receive a charging enable signal Charge_EN of the main control system and can be grounded through a resistor R5. Here, the resistance value of the resistor R5 can be 100KΩ.

[0085] The pin 9 can be grounded through a capacitor C11. The capacitance value of the capacitor C11 can be 1uF. The pins 11, 12 are respectively a serial clock interface and a serial data interface. The pins 14, 15 are respectively a data negative signal line interface and a data positive signal line interface.

[0086] The pin 16 is a battery voltage detection resistor and chip internal switch connection end, which can be connected to the battery 115 through resistors R7, R8 to access a battery signal VBAT. The pin 17 is a battery voltage feedback end, which can be connected to the battery 115 through a resistor R8 to access the battery signal VBAT. The resistors R7, R8 are both battery voltage detection resistors, and their resistance values can be 13KΩ and 150KΩ respectively.

[0087] The pin 18 is a battery connection end, which is connected to the battery 115 to access the battery signal VBAT and is grounded through a capacitor C10. The capacitance value of the capacitor C10 can be 1uF.

[0088] Pins 19-21 are the positive input terminals for battery charging current detection. They can be connected to battery 115 via resistor R2 to receive the battery signal VBAT. The resistance of resistor R2 can be 40mΩ.

[0089] Pins 22-24 are all grounded, and battery 115 can also be grounded through capacitor C9. The capacitance of capacitor C9 can be 22uF.

[0090] Based on the above embodiments, the power path management circuit further includes a first voltage divider circuit;

[0091] The external connector is connected to the positive input terminal through the first voltage divider circuit.

[0092] Specifically, such as Figure 7 As shown, the first voltage divider circuit may include a first voltage divider resistor R34 and a second voltage divider resistor R32. An external connector can be grounded through the first and second voltage divider resistors R34 and R32, and can be connected to the non-inverting input terminal of comparator U2 through the first voltage divider resistor R34. A first current-limiting resistor R35 can be connected between the first voltage divider resistor R34 and the non-inverting input terminal of comparator U2. The resistance values ​​of R34 and R32 can be 100KΩ and 82KΩ, respectively. The resistance value of R35 can be 1KΩ.

[0093] Wireless can be connected to the first voltage divider resistor R34 through the first diode D1, and VBUS can be connected to the first voltage divider resistor R34 through the second diode D2.

[0094] In this embodiment of the invention, the introduction of the first voltage divider circuit can prevent the comparator from being damaged by an excessively large first input voltage at the non-inverting input terminal, and also facilitates subsequent comparison with the second input at the inverting input terminal.

[0095] Based on the above embodiments, the power path management circuit further includes a second voltage divider circuit;

[0096] The inverting input terminal is connected to the target power supply through the second voltage divider circuit.

[0097] Specifically, such as Figure 7 As shown, the second voltage divider circuit may include a third voltage divider resistor R36 and a fourth voltage divider resistor R38. VDD can be grounded through the third and fourth voltage divider resistors R36 and R38, and can be connected to the inverting input of comparator U2 through the third voltage divider resistor R36. A second current-limiting resistor R37 can be connected between the third voltage divider resistor R36 and the inverting input of comparator U2. The resistance values ​​of R36 and R38 can be 1KΩ and 100KΩ, respectively. The resistance value of R37 can be 1KΩ.

[0098] Wireless can access the first voltage divider resistor R34 through the first diode D1, and VBUS can access the second voltage divider resistor R34 through the second diode D2.

[0099] In the embodiment of the utility model, the introduction of the second voltage divider circuit can avoid the damage of the comparator U2 caused by the second input voltage of the inverting input terminal being too large, and facilitate the comparison between the first input and the inverting input terminal.

[0100] Since the voltage is divided at the non-inverting input terminal and the inverting input terminal of the comparator U2, the first input of the non-inverting input terminal of the comparator U2 is UP=(UIN×82) / 182, and the second input of the inverting input terminal is UN=(3.3×100) / 101=3.267V, so only when the first input of the non-inverting input terminal exceeds 7.3V, the output terminal of the comparator U2 will output the first level signal. Wherein, UIN is the output of the external connector.

[0101] In actual design, because of the precision of the used components and the voltage precision, the first level signal output by the non-inverting input terminal of the comparator U2 will also fluctuate, generally not exceeding 7.5V.

[0102] On the basis of the above embodiment, as shown in Figure 7 The comparator U2 compares the first input of the non-inverting input terminal with the second input of the inverting input terminal, and generates the output signal PWR_SWITCH_EN of the output terminal.

[0103] On the basis of the above embodiment, if the comparator U2 is a push-pull output mode, the output signal PWR_SWITCH_EN can be directly generated, and if the comparator U2 is an open drain output mode, the power path management circuit further includes a pull-up resistor, the output terminal of the comparator U2 is connected with the target power supply through the pull-up resistor, and is connected with VDD. The resistance of the pull-up resistor can be 10KΩ.

[0104] On the basis of the above embodiment, the target power supply can be the normal power supply of the electronic device, which can generate a voltage signal of 3.3V.

[0105] On the basis of the above embodiment, as shown in Figure 8 The first management unit 121 includes the first switch unit 1211 and the second switch unit 1212 connected;

[0106] The first switch unit 1211 is connected with the output terminal of the comparator 111;

[0107] The second switch unit 1212 is connected with the external connector 113 and the power supply system 117 respectively;

[0108] ​Both the first switching unit 1211 and the second switching unit 1212 are configured to turn on when the output terminal of the comparator 111 outputs a first level signal.

[0109] Specifically, when the output terminal of comparator 111 outputs a first level signal, both the first switching unit 1211 and the second switching unit 1212 are turned on, and a connection is established between the external connector 113 and the power supply system 117. The external power supply 114 connected through the external connector 113 supplies power to the power supply system 117.

[0110] In addition, the first switching unit 1211 and the second switching unit 1212 are also configured to turn off when the output terminal of the comparator 111 outputs a second level signal. At this time, the connection between the external connector 113 and the power system 117 is disconnected, and the power system 117 can only be powered by the battery 115, and the battery 115 can be charged by the external power supply 114.

[0111] Based on the above embodiments, such as Figure 9 As shown, the first switching unit 1211 includes a first field-effect transistor Q8, and the drain 3 of the first field-effect transistor Q8 is connected to the second switching unit 1212.

[0112] The gate 1 of the first field-effect transistor Q8 is connected to the output terminal of comparator 111, and the output signal PWR_SWITCH_EN of comparator 111 can be connected through resistor R42. The gate 1 of the first field-effect transistor Q8 can also be grounded through resistor R43. The resistance values ​​of resistors R42 and R43 can be 1KΩ and 100KΩ, respectively. The source 2 of the first field-effect transistor Q8 is grounded.

[0113] Based on the above embodiments, such as Figure 9 As shown, the second switching unit 1212 includes a second field-effect transistor Q6 and a third field-effect transistor Q7. The second field-effect transistor Q6 and the third field-effect transistor Q7 are symmetrically arranged, and the source 2 of the second field-effect transistor Q6 and the source 2 of the third field-effect transistor Q7 are connected.

[0114] The gate 1 of the second field-effect transistor Q6 and the gate 1 of the third field-effect transistor Q7 are both connected to the first switching unit, that is, they are both connected to the drain 3 of the first field-effect transistor Q8.

[0115] The drain 3 of the second field-effect transistor Q6 is connected to an external connector. Wireless can obtain the charging signal VCC_Charge_Input through the third diode D3 and then connect it to the drain 3 of the second field-effect transistor Q6. VBUS can obtain the charging signal VCC_Charge_Input through the fourth diode D4 and then connect it to the drain 3 of the second field-effect transistor Q6.

[0116] The drain 3 of the second field effect transistor Q6 can also be grounded through the parallel connection of capacitors C20 and C21. The capacitance of C20 and C21 can be 10uF and 100nF respectively.

[0117] A capacitor C23 can be connected between the gate 1 and the source 2 of the second field effect transistor Q6 and between the gate 1 and the source 2 of the third field effect transistor Q7. The capacitance of C23 can be 100nF.

[0118] The drain 3 of the third field effect transistor Q7 is connected to the power supply system 117 to provide a power signal VCC to the power supply system 117. The drain 3 of the third field effect transistor Q7 can also be grounded through the parallel connection of capacitors C24 and C25. The capacitance of C24 and C25 can be 10uF and 100nF respectively.

[0119] When the output signal PWR_SWITCH_EN at the output end of the comparator 111 is a second level signal, the first field effect transistor Q8, the second field effect transistor Q6 and the third field effect transistor Q7 are all non-conducting. At this time, the path between the external connector 113 and the power supply system 117 is disconnected.

[0120] When the output signal PWR_SWITCH_EN at the output end of the comparator 111 is a first level signal, the first field effect transistor Q8, the second field effect transistor Q6 and the third field effect transistor Q7 are all conducting. At this time, the path between the external connector 113 and the power supply system 117 is connected, and the power supply system 117 is powered by the external power supply 114.

[0121] Based on the above embodiment, as shown in Figure 9 The second switch unit 1212 further includes a pull-up resistor R40, which can be connected between the gate 1 and the source 2 of the second field effect transistor Q6. The resistance of R40 can be 100KΩ.

[0122] Based on the above embodiment, as shown in Figure 10 The second management unit 122 can include a third switch unit 1221 and a fourth switch unit 1222 connected thereto.

[0123] The third switch unit 1221 is connected to the output end of the comparator 111 and the battery 115 respectively.

[0124] The fourth switch unit 1222 is connected to the battery 115 and the power supply system 117 respectively.

[0125] The third switch unit 1221 is configured to be turned on when the output end of the comparator 111 outputs a first level signal, and the fourth switch unit 1222 is configured to be turned off when the output end of the comparator 111 outputs a first level signal.

[0126] Specifically, when the output end of the comparator 111 outputs a first level signal, the third switch unit 1221 is turned on, the fourth switch unit 1222 is turned off, the battery 115 and the power system 117 are disconnected, and the power system 117 cannot be powered by the battery 115.

[0127] In addition, when the output end of the comparator 111 outputs a second level signal, the third switch unit 1221 is turned off, the fourth switch unit 1222 is turned on, the battery 115 and the power system 117 are connected, the power system 117 can be powered by the battery 115, and the battery 115 can be charged by the external power supply 114.

[0128] Based on the above embodiment, as shown in Figure 11 The third switch unit 1221 includes a fourth field effect tube Q5 and a triode Q4.

[0129] The gate 1 of the fourth field effect tube Q5 is connected with the output end of the comparator 111, and can be connected with the output signal PWR_SWITCH_EN of the output end of the comparator 111 through the resistor R27. The gate 1 of the fourth field effect tube Q5 can also be grounded through the resistor R30. The resistance values of the resistors R27 and R30 can be 1KΩ and 100KΩ respectively. The source 2 of the fourth field effect tube Q5 is grounded.

[0130] The drain 3 of the fourth field effect tube Q5 is connected with the battery 115 and the base of the triode Q4 respectively, and can be connected with the battery signal VBAT through the resistor R25 and connected with the base of the triode Q4 through the resistor R26. The resistance values of the resistors R25 and R26 can be 10KΩ and 10KΩ respectively.

[0131] The emitter and the collector of the triode Q4 are connected with the fourth switch unit.

[0132] The emitter of the triode Q4 is also connected with the battery 115 and connected with the battery signal VBAT.

[0133] The collector of the triode Q4 can be grounded through the resistor R28, and the resistance value of the resistor R28 can be 100KΩ.

[0134] Based on the above embodiment, as shown in Figure 11 The fourth switch unit 1222 includes a fifth field effect tube Q2 and a sixth field effect tube Q3.

[0135] The source 2 of the fifth field effect tube Q2 and the source 2 of the sixth field effect tube Q3 are connected.

[0136] The gate 1 of the fifth field effect tube Q2 and the gate 1 of the sixth field effect tube Q3 are both connected with the third switch unit, i.e. connected with the collector of the triode Q4.

[0137] The drain 3 of the fifth field effect tube Q2 is connected with the battery 115, and the battery signal VBAT is inputted.

[0138] The drain 3 of the sixth field effect tube Q3 is connected with the power system 117, and the power signal VCC is provided for the power system 117. The drain 3 of the sixth field effect tube Q3 can also be grounded through the parallel connection of the capacitors C16, C17 and C18, and the capacitance values of the capacitors C16, C17 and C18 can be 220uF, 10uF and 100nF respectively.

[0139] When the output signal PWR_SWITCH_EN of the output end of the comparator 111 is the second level signal, the fourth field effect tube Q5 and the triode Q4 are not turned on, and the fifth field effect tube Q2 and the sixth field effect tube Q3 are turned on, so that the power system 117 is powered by the battery signal VBAT provided by the battery 115.

[0140] When the output signal PWR_SWITCH_EN of the output end of the comparator 111 is the first level signal, the fourth field effect tube Q5 and the triode Q4 are turned on, and the fifth field effect tube Q2 and the sixth field effect tube Q3 are not turned on, so that the power system 117 is powered by the external power supply 114 connected with the external connector 113.

[0141] On the basis of the above-mentioned embodiments, as shown in the figure, the utility model embodiment still provides an electronic equipment, include: power system 117, battery charge and discharge management unit 118, battery 115, external connector 113 and the power path management circuit provided in each embodiment above. The electronic equipment can be a robot device, by introducing the power path management circuit, can reach the effect of using electronic equipment and charging battery at the same time when the external connector of electronic equipment is connected with external power supply, can promote the use experience of user. Figure 2

[0142] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.​

Claims

1. A power path management circuit, characterized by, Comprising: a comparator and a power path management unit; a non-inverting input of the comparator is connected with an external connector of the electronic device; the external connector is used for accessing an external power supply, and is connected with a battery of the electronic device through a battery charging and discharging management unit; the battery charging and discharging management unit is configured to charge and discharge the battery; an inverting input of the comparator is used for connecting with a target power supply; the comparator is configured to compare a first input of the non-inverting input with a second input of the inverting input, and to output a first level signal when the first input is higher than the second input; the power path management unit is connected with the battery, the external connector, an output of the comparator and a power system of the electronic device respectively; the power path management unit is configured to connect the external connector with the power system when the output of the comparator outputs the first level signal.

2. The power path management circuit of claim 1, wherein, the comparator is further configured to output a second level signal when the first input is lower than the second input; the first level signal is higher than the second level signal; the power path management unit is further configured to connect the battery with the power system when the output of the comparator outputs the second level signal.

3. The power path management circuit of claim 1, wherein, the battery charging and discharging management unit comprises a battery charging chip.

4. The power path management circuit of claim 1, wherein, further comprising a first voltage dividing circuit; the external connector is connected with the non-inverting input through the first voltage dividing circuit.

5. The power path management circuit of claim 1, wherein, further comprising a second voltage dividing circuit; the inverting input is connected with the target power supply through the second voltage dividing circuit.

6. The power path management circuit of claim 1, wherein, further comprising a pull-up resistor; an output of the comparator is connected with the target power supply through the pull-up resistor.

7. The power path management circuit of any one of claims 1-6, wherein, the target power supply is a normal power supply of the electronic device.

8. The power path management circuit of any one of claims 1-6, wherein, the external connector comprises a wireless connector and a wired connector; an input voltage of the wired connector is determined based on a charging protocol.

9. An electronic device, comprising: Comprising: a power system, a battery charging and discharging management unit, a battery, an external connector and a power path management circuit according to any one of claims 1-8.

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