Charging automatic power-on circuit and electronic equipment

Abstract

The utility model discloses a charging automatic power-on circuit and electronic equipment, and relates to the technical field of charging. The circuit comprises a charging power supply input end, a power supply management chip, a first switch unit and a driving power supply output end, a first power input pin of the power management chip is connected with a charging power input end, a first power output pin of the power management chip is connected with a battery positive electrode, and a charging feedback pin of the power management chip is connected with a control end of the first switch unit; the first switch unit is connected between the first power supply output pin and the driving power supply output end, and the driving power supply output end is connected with the driving circuit power supply end; when the charging power supply input end is connected with an external power supply, the power supply management chip converts the external power supply into a battery charging power supply, the charging power supply is output to the battery through the first power supply output pin, the power supply management chip controls the first switch unit to be switched on, and the charging power supply supplies power to the driving circuit. According to the circuit, charging and starting-up can be realized, and a user does not need to wait for the battery to be charged to a certain degree and does not need to manually start up.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging, and more particularly, to a charging automatic start-up circuit and electronic device. BACKGROUND

[0002] With the development of digitization and intelligentization, electronic devices have become an indispensable part of people's daily life and work. For example, smart phones, tablet computers, notebook computers, smart watches, and the like. Electronic devices have greatly enriched our lives and improved work efficiency. However, with the increasing power and complexity of electronic devices, their battery endurance is facing unprecedented challenges.

[0003] Existing electronic devices usually rely on built-in batteries for power supply. When the battery power is depleted, the electronic device will not start up normally. Only when the battery is charged to a certain extent, the user can operate the electronic device to start up, which leads to a decrease in user experience. UTILITY MODEL CONTENT

[0004] An object of the present application is to provide a new technical solution for charging automatic start-up.

[0005] According to a first aspect of the present application, a charging automatic start-up circuit is provided, comprising: a charging power input end, a power management chip, a first switch unit, and a driving power output end, wherein:

[0006] The first power input pin of the power management chip is connected with the charging power input end, the first power output pin of the power management chip is connected with the positive electrode of the battery, and the charging feedback pin of the power management chip is connected with the control end of the first switch unit;

[0007] The first switch unit is connected between the first power output pin and the driving power output end, and the driving power output end is used to connect the power end of the driving circuit;

[0008] When the external power is connected to the charging power input end, the power management chip converts the external power into the charging power of the battery, the charging power is output to the battery via the first power output pin, and the power management chip controls the first switch unit to be turned on through the charging feedback pin. When the first switch unit is turned on, the charging power supplies power to the driving circuit via the first switch unit and the driving power output end.

[0009] Optionally, the charging automatic start-up circuit further comprises: a start-stop key, a second switch unit, a third switch unit, a first start-stop response end, and a second start-stop response end, wherein:

[0010] The first switch machine response end is connected with the driving power output end, and is used for connecting a first detection end of the driving circuit.

[0011] The switch machine key is connected between the first power output pin and the control end of the second switch unit.

[0012] The second switch unit is connected between a ground end and a first switch machine response end.

[0013] The control end of the third switch unit is connected with the control end of the second switch unit and a second switch machine response end respectively, the third switch unit is connected between a ground end and the control end of the first switch unit, and the second switch machine response end is used for connecting a second detection end of the driving circuit.

[0014] The first power output pin is connected with the control end of the first switch unit.

[0015] In the case that an external power supply is connected to the charging power input end and the switch machine key receives a press operation of a preset time length, the first power output pin is in communication with the control end of the second switch unit and the control end of the third switch unit within the preset time length, the second switch unit and the third switch unit are turned on within the preset time length, the driving circuit responds to the preset time length of low level of the first switch machine response end, controls the third switch unit to be continuously disconnected through the second switch machine response end, the first switch unit is disconnected in the case that the third switch unit is disconnected, and the preset time length is a press time length required for the switch machine key to perform a shutdown operation.

[0016] Optionally, the charging automatic start-up circuit further comprises a voltage stabilizing chip, wherein:

[0017] The first switch unit is connected with a second power input pin of the voltage stabilizing chip, a second power output pin of the voltage stabilizing chip is connected with the driving power output end, and the voltage stabilizing chip is used for inputting a power stabilized by the charging power to the driving circuit.

[0018] Optionally, the charging automatic start-up circuit further comprises a first voltage dividing unit and a second voltage dividing unit, the first voltage dividing unit and the second voltage dividing unit are connected in series between the second power output pin and a ground end, a connection point of the first voltage dividing unit and the second voltage dividing unit is a first connection point, and the first connection point is connected with a voltage feedback pin of the voltage stabilizing chip.

[0019] The voltage stabilizing chip is further used for stabilizing the voltage of the power output by the second power output end of the voltage stabilizing chip.

[0020] Optionally, the charging automatic start-up circuit further comprises a buffer unit, wherein:

[0021] The buffer unit is connected between a second power input pin of the voltage stabilizing chip and a ground terminal, and an enable pin of the voltage stabilizing chip is connected to the second power input pin of the voltage stabilizing chip.

[0022] Optionally, the battery is a detachable battery, and the charging automatic start-up circuit further comprises a first electrostatic protection unit connected between the first power output pin and a ground terminal.

[0023] Optionally, the charging automatic start-up circuit further comprises a second electrostatic protection unit connected between a control terminal of the second switch unit and a ground terminal.

[0024] Optionally, the charging automatic start-up circuit further comprises a first filter unit connected between a control terminal of the second switch unit and a control terminal of the third switch unit.

[0025] Optionally, the charging automatic start-up circuit further comprises a temperature acquisition unit, wherein:

[0026] The temperature acquisition unit is configured to acquire a temperature of the battery and is connected between a temperature detection pin of the power management chip and a ground terminal.

[0027] The power management chip is further configured to adjust a charging power output by the first power output pin according to the temperature acquired by the temperature acquisition unit.

[0028] According to a second aspect of the present application, an electronic device is provided, which comprises the charging automatic start-up circuit according to any one of the first aspect.

[0029] The application provides a charging automatic starting circuit, comprising: a charging power input end, a power management chip, a first switch unit and a driving power output end, wherein: a first power input pin of the power management chip is connected with the charging power input end, a first power output pin of the power management chip is connected with a positive electrode of a battery, and a charging feedback pin of the power management chip is connected with a control end of the first switch unit; the first switch unit is connected between the first power output pin and the driving power output end, and the driving power output end is used for connecting a power end of a driving circuit; wherein, in the case that an external power is connected to the charging power input end, the power management chip converts the external power into a charging power of the battery, the charging power is output to the battery through the first power output pin, and the power management chip controls the first switch unit to be turned on through the charging feedback pin; in the case that the first switch unit is turned on, the charging power is supplied to the driving circuit through the first switch unit and the driving power output end. The charging automatic starting circuit can realize that the electronic device is automatically started in the case that the electronic device is charged, that is, the electronic device is automatically started in the case that the electronic device is charged. On this basis, the user does not need to wait for the battery to be charged to a certain degree, and does not need to manually start the machine, so that the user experience is greatly improved.

[0030] Other features of the application, and their advantages, will become apparent from the following detailed description of exemplary embodiments of the application with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0032] Figure 1 is a structure schematic of a charging automatic starting circuit provided by the application Figure 1 ;

[0033] Figure 2 is a structure schematic of a charging automatic starting circuit provided by the application Figure 2 ;

[0034] Figure 3 is a structure schematic of a charging automatic starting circuit provided by the application Figure 3 ;

[0035] Figure 4 is a structure schematic of a charging automatic starting circuit provided by the application Figure 4 ;

[0036] REFERENCE NUMERALS:

[0037] 10 - charging automatic starting circuit; 101 - charging power input end; 102 - power management chip;

[0038] 103 - first switch unit; 104 - driving power output end; 105 - switch-on button;

[0039] 106 - second switch unit; 107 - third switch unit; 108 - first switch-on response end;

[0040] 109 - second switch-on response end; 110 - voltage stabilizing chip; 111 - first voltage dividing unit;

[0041] 112 - second voltage dividing unit; 113 - buffer unit; 114 - first electrostatic protection unit;

[0042] 115 - second electrostatic protection unit; 116 - first filter unit; 117 - temperature acquisition unit;

[0043] 118 - fast charging current setting unit; 119 - pre-charging current setting unit;

[0044] 120 - charging cut-off current setting unit; 121 - second filter unit; 122 - third filter unit;

[0045] 123 - fourth filter unit; 124 - fifth filter unit; 20 - battery; 30 - driving circuit. DETAILED DESCRIPTION

[0046] Various exemplary embodiments of the present application will now be described in detail with reference to the figures. It should be noted that the relative arrangements, numerical expressions, and values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0047] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0048] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be considered part of the specification.

[0049] In all of the compositions and methods similar to those described herein, any particular value is to be construed as merely exemplary, and not a limitation. Thus, other compositions and methods of the exemplary embodiments can have different values.

[0050] It should be noted that like reference numerals and letters refer to like items throughout the several views of the drawings, and that discussion of one item in a drawing does not preclude further discussion of that item in subsequent drawings.

[0051] The application provides a charging automatic starting circuit, which is used to realize the function that an electronic device automatically starts when being charged in the case of being powered off due to low battery. Figure 1 As shown in the figure, the charging automatic starting circuit provided by the application comprises a charging power input end 101, a power management chip 102, a first switch unit 103 and a driving power output end 104, wherein:

[0052] The first power input pin of the power management chip 102 is connected with the charging power input end 101, the first power output pin of the power management chip 102 is connected with the positive pole of the battery, and the charging feedback pin of the power management chip 102 is connected with the control end of the first switch unit 103.

[0053] The first switch unit 103 is connected between the first power output pin and the driving power output end 104, and the driving power output end 104 is used to connect the power end of the driving circuit 30.

[0054] Wherein, in the case that the external power is connected to the charging power input end 101, the power management chip 102 converts the external power into the charging power of the battery 20, the charging power is output to the battery 20 through the first power output pin, and the power management chip 102 controls the first switch unit 103 to be turned on through the charging feedback pin, in the case that the first switch unit 103 is turned on, the charging power is supplied to the driving circuit 30 through the first switch unit 103 and the driving power output end 104.

[0055] In the application, the charging power input end 101 is used to connect the external power, for example, to connect the VBUS pin in the external TYPE-C connecting line. The driving circuit 30 is a circuit for controlling the starting of the electronic device.

[0056] In the case that the external power is connected to the charging power input end 101, that is, the electronic device is being charged, the power management chip 102 converts the external power into the charging power of the battery 20, and outputs it to the positive pole of the battery 20 through the first power output pin, so as to charge the battery 20. At the same time, the power management chip 102 controls the first switch unit 103 to be turned on through the charging feedback pin. The first power output pin of the power management chip 102, the first switch unit 103, the driving power output end 104 and the power end of the driving circuit 30 form a path. The charging power converted by the power management chip 102 is input into the driving circuit 30 based on the path, and supplies power to the driving circuit 30, so that the driving circuit 30 starts to work, and the electronic device starts. In this way, the electronic device automatically starts in the case that the electronic device is being charged, that is, the electronic device starts when being charged. On this basis, the user does not need to wait for the battery to be charged to a certain extent, and does not need to manually start the electronic device, so that the user experience is greatly improved.

[0057] The application provides a charging automatic starting circuit, comprising: a charging power input end, a power management chip, a first switch unit and a driving power output end, wherein: a first power input pin of the power management chip is connected with the charging power input end, a first power output pin of the power management chip is connected with a positive electrode of a battery, and a charging feedback pin of the power management chip is connected with a control end of the first switch unit; the first switch unit is connected between the first power output pin and the driving power output end, and the driving power output end is used for connecting a power end of a driving circuit; wherein, in the case that an external power is connected to the charging power input end, the power management chip converts the external power into a charging power of the battery, the charging power is output to the battery through the first power output pin, and the power management chip controls the first switch unit to be turned on through the charging feedback pin; in the case that the first switch unit is turned on, the charging power is supplied to the driving circuit through the first switch unit and the driving power output end. The charging automatic starting circuit can realize that the electronic device is automatically started when the electronic device is charged, that is, the electronic device is started when it is charged. On this basis, the user does not need to wait for the battery to be charged to a certain extent, and does not need to manually start the electronic device, so that the user experience is greatly improved.

[0058] In an embodiment of the application, the charging automatic starting circuit provided by the application can also be used for the user to manually control the electronic device to be turned off. On this basis, as shown in Figure 2 the charging automatic starting circuit provided by the application further comprises:

[0059] a switch key 105, a second switch unit 106, a third switch unit 107, a first switch response end 108 and a second switch response end 109, wherein:

[0060] the first switch response end 108 is connected with the driving power output end 104, and the first switch response end 108 is used for connecting a first detection end of the driving circuit 30;

[0061] the switch key 105 is connected between the first power output pin and a control end of the second switch unit 106;

[0062] the second switch unit 106 is connected between a ground end and the first switch response end 108;

[0063] a control end of the third switch unit 107 is connected with the control end of the second switch unit 106 and the second switch response end 109 respectively, the third switch unit 107 is connected between the ground end and a control end of the first switch unit 103, and the second switch response end 109 is used for connecting a second detection end of the driving circuit 30;

[0064] the first power output pin is connected with the control end of the first switch unit 103;

[0065] In the case that the external power supply is connected to the charging power input terminal 101 and the switch-on button 105 receives a press operation of a preset time length, the first power output pin is in communication with the control end of the second switch unit 106 and the control end of the third switch unit 107 for the preset time length, the second switch unit 106 and the third switch unit 107 are turned on for the preset time length, the driving circuit 30 responds to the preset time length of low level of the first switch-on response end 108, controls the third switch unit 107 to be continuously disconnected through the second switch-on response end 109, and the first switch unit 103 is disconnected in the case that the third switch unit 107 is disconnected. The preset time length is the press time length corresponding to the switch-off operation of the switch-on button 105.

[0066] In the embodiment, the switch-on button 105 is used for triggering by the user to control the electronic device to be switched off. Specifically, in the case that the user presses the switch-on button 105 and the press time length is the press time length corresponding to the switch-off operation, it is determined that the switch-on button 105 receives the switch-off operation.

[0067] In the case that the external power supply is connected to the charging power input terminal 101 and the battery is continuously charged, the driving circuit 30 starts to work. At the same time, in the case that the switch-off button receives a press operation of a preset time length as the switch-off operation, the first power output pin is in communication with the control end of the second switch unit 106 and the control end of the third switch unit 107 for the preset time length. The second switch unit 106 and the third switch unit 107 are turned on for the preset time length. Since the second switch unit 106 is connected between the ground end and the first switch-on response end 108, the first switch-on response end 108 is low for the preset time length. The driving circuit 30 determines that the first switch-on response end 108 is low for the preset time length according to the first detection end, and further identifies that the switch-on button 105 receives the switch-off operation. At this time, the driving circuit 30 sets the level of the second switch-on response end 109 through the second detection end to control the third switch unit 107 to be continuously disconnected. In the case that the third switch unit 107 is continuously disconnected, the first switch unit 103 is continuously disconnected, the first power output end is disconnected from the power end of the driving circuit 30, the charging power supply cannot supply power to the driving circuit 30 through the first switch unit 103 and the driving power output end 104, the driving circuit 30 no longer works, and the electronic device is switched off. In this way, the function that the user completes the electronic device to be switched off by performing the switch-off operation can be realized, and the battery charging is not affected.

[0068] It should be noted that, in the embodiment, the first power output pin is connected to the control end of the first switch unit 103 to set the initial state of the first switch unit 103, so as to avoid the first switch unit 103 being turned on in the case that the external power supply is not connected to the charging power input terminal 101. Similarly, the first switch-on response end 108 is connected to the driving power output end 104.

[0069] In any of the above embodiments, in an embodiment of the present application, as shown in Figure 3 the charging automatic start-up circuit further comprises a voltage stabilizing chip 110, wherein:

[0070] The first switch unit 103 is connected to a second power input pin of the voltage stabilizing chip 110, a second power output pin of the voltage stabilizing chip 110 is connected to the driving power output end 104, and the voltage stabilizing chip 110 is configured to input the charging power stabilized by the voltage stabilizing chip 110 to the driving circuit 30.

[0071] It should be noted that, Figure 3 is shown on the basis of Figure 2 .

[0072] In the present application, the voltage stabilizing chip 110 stabilizes the charging power converted by the power management chip 102 and inputs the stabilized charging power to the power end of the driving circuit 30. In this way, the driving circuit 30 can be provided with stable charging power to avoid damage to the driving circuit 30.

[0073] In an embodiment of the present application, as shown in Figure 3 the charging automatic start-up circuit further comprises a first voltage dividing unit 111 and a second voltage dividing unit 112, the first voltage dividing unit 111 and the second voltage dividing unit 112 are connected in series between the second power output pin and the ground end, a connection point of the first voltage dividing unit 111 and the second voltage dividing unit 112 is a first connection point, and the first connection point is connected to a voltage feedback pin of the voltage stabilizing chip 110.

[0074] The voltage stabilizing chip 110 is further configured to stabilize the voltage of the power output by the second power output end of the voltage stabilizing chip 110.

[0075] In the present application, the voltage stabilizing chip 110 adjusts the voltage of the power output by the second power output pin through the first connection point, thereby stabilizing the voltage of the power output by the second power output pin. In this way, the driving circuit 30 is further provided with stable power to avoid damage to the driving circuit 30.

[0076] In an example of the present application, the first voltage dividing unit 111 and the second voltage dividing unit 112 can be resistors, respectively.

[0077] In an embodiment of the present application, as shown in Figure 3 the charging automatic start-up circuit further comprises a buffer unit 113, wherein:

[0078] The buffer unit 113 is connected between the second power input pin of the voltage stabilizing chip 110 and the ground terminal, and the enable pin of the voltage stabilizing chip 110 is connected to the second power input pin of the voltage stabilizing chip 110.

[0079] In the present application, in the case that the enable pin of the voltage stabilizing chip 110 is connected to the charging power input by the first switch unit 103, the voltage stabilizing chip 110 is enabled instantaneously, and there is a possibility that the voltage stabilizing chip 110 is damaged by the instantaneous impact of the charging power. In order to avoid the problem, the buffer unit 113 is provided as shown in the figure, so as to buffer the aforementioned instantaneous impact of the charging power, thereby protecting the voltage stabilizing chip 110. Figure 3

[0080] In one example of the present application, the buffer unit 113 can be implemented by a capacitor.

[0081] In one embodiment of the present application, in the case that the battery is a detachable battery, the charging automatic start-up circuit provided by the present application further comprises a first electrostatic protection unit 114, and the first electrostatic protection unit 114 is connected between the first power output pin and the ground terminal. Figure 3

[0082] In the present application, in the case that the battery is a detachable battery, there is a possibility that static electricity is generated due to the plugging and unplugging of the battery during the process of detaching the battery, at the positive electrode of the battery, i.e. the first power output pin. In the case that the first power output pin is connected to the second switch unit 106 and the third switch unit 107, there is a possibility that the aforementioned static electricity damages the second switch unit 106 and / or the third switch unit 107. In order to avoid the problem, the first electrostatic protection unit 114 is provided.

[0083] In one example, the first electrostatic protection unit 114 can be implemented by two reverse series connected voltage stabilizing diodes.

[0084] Similarly, in one embodiment of the present application, the charging automatic start-up circuit provided by the present application further comprises a second electrostatic protection unit 115, and the second electrostatic protection unit 115 is connected between the control terminal of the second switch unit 106 and the ground terminal. Figure 3

[0085] In the present embodiment, in the case that the switch key 105 is pressed by the user, there is a possibility that static electricity is generated due to the pressing of the switch key 105 by the user, at the control terminal of the second switch unit 106. In the case that the first power output pin is connected to the second switch unit 106 and the third switch unit 107, there is a possibility that the aforementioned static electricity damages the second switch unit 106 and / or the third switch unit 107. In order to avoid the problem, the second electrostatic protection unit 115 is provided. ​​​

[0086] In one example, the second electrostatic protection unit 115 can be implemented by two reverse series voltage stabilizing diodes.

[0087] In one embodiment of the present application, as shown in Figure 3 The automatic power-on circuit provided by the present application further comprises a first filter unit 116 connected between the control end of the second switch unit 106 and the control end of the third switch unit 107.

[0088] In the present embodiment, the first filter unit 116 filters the charging power output via the power-off button, so that the second switch unit 106 and the third switch unit 107 receive stable control signals, thereby realizing stable conduction.

[0089] In one example of the present application, the filter unit can be implemented by an RC device.

[0090] In one embodiment of the present application, as shown in Figure 4 The automatic power-on circuit provided by the present application further comprises a temperature acquisition unit 117, wherein:

[0091] The temperature acquisition unit 117 is used to acquire the temperature of the battery and is connected between the temperature detection pin of the power management chip 102 and the ground end.

[0092] The power management chip 102 is further used to adjust the charging power output by the first power output pin according to the temperature acquired by the temperature acquisition unit 117.

[0093] In the present application, the temperature acquisition unit 117 acquires the temperature of the battery and reports the acquired temperature of the battery to the power management chip 102. The power management chip 102 controls the first power output pin to output the charging power matching the temperature of the battery based on the temperature of the battery acquired by the temperature acquisition unit 117. The charging power includes charging voltage and / or charging current.

[0094] In one example of the present application, the temperature acquisition unit 117 can be implemented by a resistance and an NTC connected in series between the temperature detection pin and the ground end.

[0095] In one embodiment of the present application, as shown in ​ The automatic power-on circuit provided by the present application further comprises at least one of a fast charging current setting unit 118, a pre-charging current setting unit 119 and a charging cutoff current setting unit 120, wherein:

[0096] The fast charging current setting unit 118 is connected between the ground end and the fast charging current setting pin.

[0097] The pre-charge current setting unit 119 is connected between the ground terminal and the pre-charge current setting pin;

[0098] The charge cut-off current setting unit 120 is connected between the ground terminal and the charge current cut-off pin.

[0099] In the present application, at least one of the fast charge current setting unit 118, the pre-charge current setting unit 119 and the charge cut-off current setting unit 120 is used to set at least one of the fast charge current value, the pre-charge current value and the charge cut-off current value corresponding to the charging power output by the power management chip 102.

[0100] In one example, the fast charge current setting unit 118, the pre-charge current setting unit 119 and the charge cut-off current setting unit 120 can be respectively realized by resistors. And the size of the fast charge current value, the pre-charge current value and the charge cut-off current value corresponding to the charging power is set by setting the resistance value of the resistor.

[0101] As shown in ​ To improve the working stability of the charging automatic start-up circuit provided by the present application, the charging automatic start-up circuit provided by the present application can further be provided with a second filter unit 121 on the side of the charging power input terminal 101, and the second filter unit 121 is connected between the charging power input terminal 101 and the ground terminal. The second filter unit 121 is specifically shown by taking one capacitor C1 as an example;

[0102] A third filter unit 122 is provided on the side of the first power output pin, and the third filter unit 122 is connected between the first power output pin and the ground terminal. The third filter unit 122 is specifically shown by taking one capacitor C2 as an example;

[0103] A fourth filter unit 123 is provided on the side of the second power input terminal, and the fourth filter unit 123 is connected between the second power input terminal and the ground terminal. The fourth filter unit 123 is specifically shown by taking a capacitor C3 and a capacitor C4 in parallel as an example;

[0104] A fifth filter unit 124 is provided on the second power output pin of the voltage stabilizing chip 110, and the fifth filter unit 124 is connected between the second power output pin of the voltage stabilizing chip 110 and the ground terminal. The fifth filter unit 124 is specifically shown by taking one capacitor C5 as an example;

[0105] The first switch unit 103 can be realized by a PMOS tube Q1. Wherein, the gate of the PMOS tube Q1 serves as the control terminal of the first switch unit 103, the source of the PMOS tube Q1 is connected with the first power output pin, and the drain of the PMOS tube Q1 serves as the driving power output terminal 104.

[0106] The second switch unit 106 is realized by the resistor R1, the resistor R2 and the PNP transistor Q2. Specifically, the resistor R1 is connected between the switch-on button 105 and the base of the PNP transistor Q2, the collector of the PNP transistor Q2 is connected with the first switch-on response end, the emitter of the PNP transistor Q2 is grounded, and the resistor R2 is connected between the base of the PNP transistor Q2 and the ground end.

[0107] The first switch-on response end is connected with the second power supply output pin of the voltage stabilizing chip 110 through the resistor R3.

[0108] The second switch-on response end 109 is connected with the control end of the third switch unit 107 through the resistor R4.

[0109] The third switch unit 107 is realized by a PNP transistor Q3 and a resistor R5. Specifically, the base of the PNP transistor Q3 is connected with the resistor R4, the emitter of the PNP transistor Q3 is grounded, and the collector of the PNP transistor Q3 is connected with the gate of the PMOS transistor Q1 through the resistor R5.

[0110] The first power supply output pin is connected with the source of the PMOS transistor Q1 through the resistor R6.

[0111] The first voltage division unit 111 includes the resistor R7, the second voltage division unit 112 includes the resistor R8, and the capacitor C6 can also be connected in parallel with the resistor R7.

[0112] The buffer unit 113 is the capacitor C7.

[0113] The first electrostatic protection unit 114 includes the voltage stabilizing diode D1 and the voltage stabilizing diode D2.

[0114] The second electrostatic protection unit 115 includes the voltage stabilizing diode D3 and the voltage stabilizing diode D4.

[0115] The first filter unit 116 includes the resistor R9 and the capacitor C8.

[0116] The temperature acquisition unit 117 includes the resistor R10 and the NTC resistor R11.

[0117] The fast charging current setting unit is the resistor R12.

[0118] The pre-charging current setting unit is the resistor R13.

[0119] The charging cut-off current setting unit is the resistor R14.

[0120] The charging feedback pin of the power management chip 102 is connected with the gate of the PMOS transistor Q1 through the resistor R15.

[0121] The application also provides an electronic device comprising the automatic charging and starting circuit according to any one of the above embodiments.

[0122] Embodiments of the application have been described above, with the understanding that these embodiments are exemplary only and are not exhaustive of overall scope of the application. Many modifications and variations will be apparent to those of ordinary skill in the art. The scope of the application is defined by the appended claims.

Claims

1. A charging automatic power-on circuit (10), characterized in that: include: A charging power input terminal (101), a power management chip (102), a first switch unit (103) and a driving power output terminal (104), wherein: The first power input pin of the power management chip (102) is connected to the charging power input terminal (101), the first power output pin of the power management chip (102) is connected to the positive electrode of the battery, and the charging feedback pin of the power management chip (102) is connected to the control terminal of the first switch unit (103); The first switch unit (103) is connected between the first power output pin and the driving power output terminal (104), and the driving power output terminal (104) is used to connect to the power terminal of the driving circuit (30); Wherein, when the charging power input terminal (101) is connected to an external power supply, the power management chip (102) converts the external power supply into a charging power supply for the battery (20), and the charging power supply is output to the battery (20) via the first power output pin, and the power management chip (102) controls the first switch unit (103) to be turned on via the charging feedback pin, and when the first switch unit (103) is turned on, the charging power supply supplies power to the drive circuit (30) via the first switch unit (103) and the drive power output terminal (104); The automatic charging start-up circuit further includes a temperature acquisition unit (117), wherein: The temperature acquisition unit (117) is used to acquire the temperature of the battery (20) and is connected between the temperature detection pin of the power management chip (102) and the ground terminal; The power management chip (102) is further used to adjust the charging power output by the first power output pin according to the temperature.

2. The circuit according to claim 1, wherein: The charging automatic power-on circuit further includes: a power-on / off button (105), a second switch unit (106), a third switch unit (107), a first power-on / off response terminal (108) and a second power-on / off response terminal (109), wherein: The first on / off response terminal (108) is connected to the driving power supply output terminal (104), and the first on / off response terminal (108) is used to connect to the first detection terminal of the driving circuit (30); The power button (105) is connected between the first power output pin and the control end of the second switch unit (106); The second switch unit (106) is connected between the ground terminal and the first switch response terminal (108); The control end of the third switch unit (107) is connected to the control end of the second switch unit (106) and the second switch response end (109), respectively. The third switch unit (107) is connected between the ground end and the control end of the first switch unit (103). The second switch response end (109) is used to connect to the second detection end of the drive circuit (30). The first power output pin is connected to the control end of the first switch unit (103); Wherein, when the charging power input terminal (101) is connected to an external power supply and the power button (105) receives a pressing operation for a preset time, the first power output pin is connected to the control terminal of the second switch unit (106) and the control terminal of the third switch unit (107) for the preset time, the second switch unit (106) and the third switch unit (107) are turned on for the preset time, the driving circuit (30) responds to the low level of the first power response terminal (108) for the preset time, and controls the third switch unit (107) to be continuously disconnected through the second power response terminal (109), and the first switch unit (103) is disconnected when the third switch unit (107) is disconnected, and the preset time is the pressing time required for the power button (105) to perform the shutdown operation.

3. The circuit according to claim 1, wherein: The charging automatic power-on circuit further includes a voltage stabilizing chip (110), wherein: The first switch unit (103) is connected to the second power input pin of the voltage stabilizing chip (110), and the second power output pin of the voltage stabilizing chip (110) is connected to the driving power output end (104). The voltage stabilizing chip (110) is used to input the stabilized charging power supply into the driving circuit (30).

4. The circuit according to claim 3, characterized in that The charging automatic power-on circuit further comprises: a first voltage dividing unit (111) and a second voltage dividing unit (112), wherein the first voltage dividing unit (111) and the second voltage dividing unit (112) are connected in series between the second power supply output pin and the ground terminal, and the connection point between the first voltage dividing unit (111) and the second voltage dividing unit (112) is a first connection point, and the first connection point is connected to the voltage feedback pin of the voltage stabilizing chip (110); The voltage stabilizing chip (110) is also used to stabilize the voltage of the power supply outputted by the second power supply output terminal of the voltage stabilizing chip (110).

5. The circuit according to claim 3, characterized in that The charging automatic power-on circuit further includes a buffer unit (113), wherein: The buffer unit (113) is connected between the second power input pin of the voltage stabilizing chip (110) and the ground terminal, and the enable pin of the voltage stabilizing chip (110) is connected to the second power input pin of the voltage stabilizing chip (110).

6. The circuit according to claim 2, characterized in that The battery (20) is a detachable battery, and the automatic charging power-on circuit further comprises: a first electrostatic protection unit (114), wherein the first electrostatic protection unit (114) is connected between the first power output pin and the ground terminal.

7. The circuit according to claim 2, characterized in that The charging automatic power-on circuit further includes: a second electrostatic protection unit (115), wherein the second electrostatic protection unit (115) is connected between the control end and the ground end of the second switch unit (106).

8. The circuit according to claim 2, characterized in that The charging automatic power-on circuit further includes: a first filtering unit (116) connected between the control end of the second switch unit (106) and the control end of the third switch unit (107).

9. An electronic device, characterized in that: The electronic device comprises the automatic charging power-on circuit according to any one of claims 1 to 8.

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