CN111399617B - Power supply control device and electronic apparatus - Google Patents
Power supply control device and electronic apparatus Download PDFInfo
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- CN111399617B CN111399617B CN202010151038.4A CN202010151038A CN111399617B CN 111399617 B CN111399617 B CN 111399617B CN 202010151038 A CN202010151038 A CN 202010151038A CN 111399617 B CN111399617 B CN 111399617B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
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- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention provides a power supply control device and electronic equipment with simple circuit design and simple processing flow. The power supply control device comprises an enabling control module and a voltage conversion module, the electronic equipment comprises an embedded controller, a power supply module and a starting signal providing module, the enabling control module is electrically connected with the voltage conversion module, the power supply module and the starting signal providing module, the voltage conversion module is electrically connected with the embedded controller, the power supply module and the charger, and the power supply module is electrically connected with the battery or the charger; if the charger supplies power, the voltage conversion module receives a charging signal sent by the charger and converts a first working voltage provided by the power supply module into a second working voltage according to the charging signal to supply power to the embedded controller; if the battery supplies power, the voltage conversion module converts the first working voltage into a second working voltage according to an enable signal generated by the enable control module according to the starting signal sent by the starting signal providing module so as to supply power to the embedded controller.
Description
Technical Field
The invention relates to the technical field of power supply control, in particular to a power supply control device and electronic equipment.
Background
At present, a control circuit for supplying power to an Embedded Controller (EC) chip in an electronic device is not only complex in design. Meanwhile, no matter the charger is powered on or the battery is powered on, whether the charger is started or not and whether the charger is connected or disconnected are considered, so that the process is complicated.
Disclosure of Invention
In view of the above, the present invention provides a power supply control device and an electronic apparatus, which have the advantages of simple circuit design and simple processing flow.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment provides a power supply control device, which is applied to an electronic device, and includes an enable control module and a voltage conversion module, where the electronic device further includes an embedded controller, a power supply module, and a power-on signal providing module, the enable control module is electrically connected to the voltage conversion module, the power supply module, and the power-on signal providing module, the voltage conversion module is electrically connected to the embedded controller and the power supply module, the power supply module is electrically connected to a battery or a charger, and the voltage conversion module is electrically connected to the charger;
the power supply module is used for supplying power to the voltage conversion module by using a first working voltage when the charger or the battery supplies power to the electronic equipment;
when the charger supplies power to the electronic equipment, the voltage conversion module is used for receiving a charging signal sent by the charger and converting the first working voltage into a second working voltage according to the charging signal to supply power to the embedded controller;
when the battery supplies power to the electronic equipment, the voltage conversion module is used for receiving an enabling signal sent by the enabling control module and converting the first working voltage into a second working voltage according to the enabling signal to supply power to the embedded controller; the enabling signal is generated by the enabling control module when receiving the starting signal sent by the starting signal providing module.
In an alternative embodiment, the enable control module is electrically connected to the embedded controller;
the enabling control module is used for sending the enabling signal to the voltage conversion module and sending a starting-up prompting signal to the embedded controller when receiving the starting-up signal, so that the embedded controller sends a starting-up signal to the enabling control module;
the enabling control module is further used for continuously sending the enabling signal to the voltage conversion module according to the starting signal.
In an optional embodiment, the electronic device further comprises a processor electrically connected to the embedded controller;
and the embedded controller is used for sending the starting signal to the enabling control module when receiving a system starting signal provided by the processor.
In an optional embodiment, the embedded controller is further configured to send a stop signal to the enable control module when receiving a system shutdown signal sent by the processor;
the enabling control module is further used for stopping sending the enabling signal to the voltage conversion module when the stopping signal is received.
In an optional embodiment, the enable control module includes a switch unit and a power-on signal processing unit, the power-on signal providing module is electrically connected to the embedded controller through the power-on signal processing unit, and the switch unit is electrically connected to the embedded controller, the power-on signal processing unit and the voltage conversion module;
the starting signal processing unit is used for receiving the starting signal and sending a starting prompt signal to the embedded controller;
the switch unit is used for receiving the starting signal and sending the enabling signal to the voltage conversion module.
In an optional implementation manner, the switch unit includes a first switch tube, a second switch tube, a first resistor and a second resistor, where the first resistor and the second resistor are connected in series between a second pin of the first switch tube and a second pin of the second switch tube, a first pin of the first switch tube is electrically connected between the first resistor and the second resistor, the second pin of the first switch tube is further electrically connected to the power module, a third pin of the first switch tube is electrically connected to the voltage conversion module, a first pin of the second switch tube is electrically connected to the embedded controller, a second pin of the second switch tube is electrically connected to the power-on signal processing unit, and a third pin of the second switch tube is grounded.
In an optional embodiment, the power-on signal processing unit includes a third resistor, a first diode and a second diode, the power-on signal providing module is electrically connected to both a cathode of the first diode and a cathode of the second diode, an anode of the first diode is electrically connected to the embedded controller, one end of the third resistor is electrically connected to the power module, the other end of the third resistor is electrically connected between the anode of the first diode and the embedded controller, and an anode of the second diode is electrically connected to the switching unit.
In an optional embodiment, the voltage conversion module includes a voltage conversion chip, an input end of the voltage conversion chip is electrically connected to the power module, an enable end of the voltage conversion chip is electrically connected to the enable control module, the enable end of the voltage conversion chip is used for being electrically connected to the charger, and an output end of the voltage conversion chip is electrically connected to the embedded controller.
In an optional embodiment, the voltage conversion module further includes a third diode and a fourth diode, an anode of the third diode is electrically connected to the enable control module, an anode of the fourth diode is used for being electrically connected to the charger, and a cathode of the third diode and a cathode of the fourth diode are both electrically connected to the enable terminal of the voltage conversion chip.
In a second aspect, an embodiment provides an electronic device, which includes an embedded controller, a power module, a power-on signal providing module, and the power supply control apparatus of the first aspect.
The power supply control device and the electronic equipment provided by the embodiment of the invention have the beneficial effects that: the power supply control device can realize power supply to the embedded controller under two conditions of power supply of the charger and the battery only according to the enabling control module and the voltage conversion module, and the power supply control device consisting of the enabling control module and the voltage conversion module has a simple circuit and further saves the cost. Meanwhile, when the charger supplies power, a charging signal is generated, and the voltage conversion module can supply power to the embedded controller according to the charging signal; when the battery supplies power, the charger can not generate a charging signal, but the voltage conversion module can receive an enabling signal provided by the enabling control module when the starting signal is generated, so that when the battery supplies power, only whether the starting signal is generated or not needs to be considered, whether the charger is in an access state or in a pull-out state does not need to be considered, and the processing flow of the power supply control device is simpler.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating a power supply control apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another power supply control device provided in the embodiment of the present invention;
fig. 4 shows a schematic circuit diagram of a power supply control device according to an embodiment of the present invention.
Icon: 10-an electronic device; 100-a power supply control device; 110-enable control module; 111-a switching unit; 112-a start-up signal processing unit; 120-voltage conversion module; 200-an embedded controller; 300-a power supply module; 400-a power-on signal providing module; 500-a processor; 20-a charger; 30-a battery; q1-first switch tube; q2-second switch tube; r1 — first resistance; r2 — second resistance; r3 — third resistance; d1 — first diode; d2 — second diode; d3 — third diode; d4 — fourth diode; U1-Voltage conversion chip; c1 — first capacitance; c2-second capacitance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1, a schematic structural diagram of an electronic device 10 according to an embodiment of the present invention is shown, where the electronic device 10 includes a power supply control apparatus 100, an embedded controller 200, a power module 300, and a power-on signal providing module 400. The power supply control device 100 is electrically connected to the embedded controller 200, the power module 300 and the power-on signal providing module 400, the power supply control device 100 is further electrically connected to the charger 20, and the power module 300 is electrically connected to the charger 20 or the battery 30.
In the present embodiment, the power module 300 is configured to supply power to the power supply control device 100 with a first operating voltage when the charger 20 or the battery 30 supplies power to the electronic device 10; when the charger 20 supplies power to the electronic device 10, the power supply control device 100 is configured to receive a charging signal sent by the charger 20, and convert the first working voltage into a second working voltage according to the charging signal to supply power to the embedded controller 200; when the charger 20 supplies power to the electronic device 10, the power supply control device 100 is configured to convert the first operating voltage into a second operating voltage according to an enable signal to supply power to the embedded controller 200, where the enable signal is generated when the power supply control device 100 receives the power-on signal sent by the power-on signal providing module 400.
In the present embodiment, the electronic device 10 may be a notebook and a device that can be powered by the battery 30; the charger 20 and battery 30 may be provided separately by another manufacturer, or may be provided by a manufacturer that produces or manufactures the electronic device 10; the power module 300 may employ a dc-dc conversion module for converting the voltage provided by the charger or the voltage provided by the battery into a first operating voltage and into a voltage required for operating other devices of the electronic apparatus 10. The power-on signal providing module 400 may be a button, and the power-on signal providing module 400 is configured to generate a power-on signal in response to a power-on pressing operation of a user.
Referring to fig. 2, which is a schematic structural diagram of an implementation of the power supply control device 100 shown in fig. 1, the power supply control device 100 includes an enable control module 110 and a voltage conversion module 120, the enable control module 110 is electrically connected to the voltage conversion module 120, the power supply module 300 and the power-on signal providing module 400, the voltage conversion module is electrically connected to the embedded controller 200 and the power supply module 300, and the voltage conversion module 120 is used for being electrically connected to the charger 20.
In the present embodiment, the power module 300 is configured to supply power to the voltage conversion module 120 with a first operating voltage when the charger 20 or the battery 30 supplies power to the electronic device 10; when the charger 20 supplies power to the electronic device 10, the voltage conversion module 120 is configured to receive a charging signal sent by the charger 20, and convert the first working voltage into a second working voltage according to the charging signal to supply power to the embedded controller 200; when the battery 30 supplies power to the electronic device 10, the voltage conversion module 120 is configured to receive an enable signal sent by the enable control module 110, and convert the first operating voltage into a second operating voltage according to the enable signal to supply power to the embedded controller 200; the enable signal is generated by the enable control module 110 when receiving the power-on signal sent by the power-on signal providing module 400.
It can be understood that when the charger 20 supplies power to the electronic device 10, since the charger 20 is electrically connected to the voltage conversion module 120, the charger 20 directly provides a charging signal to the voltage conversion module 120, the voltage conversion module 120 converts the first operating voltage into the second operating voltage according to the charging signal and provides the second operating voltage to the embedded controller 200, and the embedded controller 200 operates according to the second operating voltage. When the battery 30 supplies power to the electronic device 10, the charger 20 is disconnected from the voltage conversion module 120, so the charger 20 cannot provide a charging signal to the voltage conversion module 120, but the enable control module 110 generates an enable signal when receiving the power-on signal sent by the power-on signal providing module 400, and transmits the enable signal to the voltage conversion module 120, the voltage conversion module 120 converts the first working voltage into a second working voltage according to the enable signal, and provides the second working voltage to the embedded controller 200, and the embedded controller 200 operates according to the second working voltage.
In this embodiment, the power module 300 further provides the first operating voltage to the enable control module 110, and after receiving the first operating voltage, the enable control module 110 generates the enable signal if receiving the power-on signal provided by the power-on signal providing module 400. The enable control module 110 generates the enable signal not only when the battery 30 is powered but also when the charger 20 is powered. Therefore, when the charger 20 supplies power, the voltage conversion module 120 may receive not only the charging signal but also the enable signal; however, the voltage conversion module 120 only receives the enable signal when the battery 30 is powered.
In the present embodiment, the enable control module 110 is electrically connected to the embedded controller 200. The specific principle of the enable control module 110 generating the enable signal according to the power-on signal is as follows: the enable control module 110 is configured to send an enable signal to the voltage conversion module 120 when receiving the power-on signal, and send a power-on prompt signal to the embedded controller 200 at the same time, so that the embedded controller 200 sends a start signal to the enable control module 110; the enable control module 110 is further configured to continue to send the enable signal to the voltage conversion module 120 according to the enable signal.
Further, as shown in fig. 1, the electronic device 10 further includes a processor 500, and the processor 500 is electrically connected to the embedded controller 200. The embedded controller 200 is configured to send a start signal to the enable control module 110 when receiving a system start signal provided by the processor 500.
It is understood that when the charger 20 is powered to convert to battery 30, the power-on signal providing module 400 generates the power-on signal when the charger 20 is powered if the electronic device 10 is already in the power-on state when the charger 20 is powered. Therefore, when the power supply of the charger 20 is converted into the power supply of the battery 30, in order to ensure that the voltage conversion module 120 continues to provide the second working voltage to the embedded controller 200, the enable control module 110 needs to generate the enable signal, because the electronic device 10 is already in the power-on state after the power supply of the charger 20 is converted into the power supply of the battery 30, the power-on signal providing module 400 does not generate the power-on signal any more, because the processor 500 detects that the electronic device 10 is in the power-on state, the processor sends the system power-on signal to the embedded controller 200, and the enable control module 110 generates the start signal when receiving the system power-on signal, thereby ensuring that the voltage conversion module 120 continues to provide the power to the embedded controller 200.
In this embodiment, the power-on signal and the system power-on signal may be set to a low level signal (e.g., 0V), the enable signal and the charging signal may be set to a high level signal (e.g., 3.3V), the power-on prompt signal may be set to a low level signal, and the start signal may be set to a high level signal. Processor 500 may be a Central Processing Unit (CPU).
In this embodiment, the embedded controller 200 is further configured to send a stop signal to the enable control module 110 when receiving a system shutdown signal sent by the processor 500; the enable control module 110 is further configured to stop sending the enable signal to the voltage conversion module 120 when receiving the stop signal.
It can be understood that when the electronic device 10 is switched from the power-on state to the power-off state, that is, the electronic device 10 is powered off, the processor 500 sends a system power-off signal to the embedded controller 200, the embedded controller 200 stops sending the start signal to the enable control module 110 according to the system power-off signal, and sends the stop signal to the enable control module 110, and the enable control module 110 stops sending the enable signal to the voltage conversion module 120 according to the stop signal. If the battery 30 supplies power to the electronic device 10 at this time, and the voltage conversion module 120 does not receive the charging signal and the enabling signal, the power supply to the embedded controller 200 is stopped. Therefore, when the battery 30 supplies power, if the electronic device 10 is in the power-off state, the power supply to the embedded controller 200 can be stopped, thereby saving the energy consumption of the electronic device 10.
In this embodiment, the sending of the stop signal to the enable control module 110 by the embedded controller 200 may be sending after receiving a system shutdown signal, or sending after receiving a delay of a preset time from the system shutdown signal. The preset time may be set to 9S.
The system shutdown signal may be set to a high level signal, and the stop signal may be set to a low level signal.
Further, referring to fig. 3, which is a schematic diagram of an implementable specific structure of the power supply control device 100 shown in fig. 2, the enabling control module 110 includes a switch unit 111 and a start-up signal processing unit 112, the start-up signal providing module 400 is electrically connected to the embedded controller 200 through the start-up signal processing unit 112, and the switch unit 111 is electrically connected to the embedded controller 200, the start-up signal processing unit 112, and the voltage conversion module 120.
In this embodiment, the power-on signal processing unit 112 is configured to receive a power-on signal and send a power-on prompt signal to the embedded controller 200; the switch unit 111 is used for receiving the start signal and sending an enable signal to the voltage conversion module 120.
Further, please refer to fig. 4, which is a schematic circuit diagram of the power supply control apparatus 100. The switch unit 111 includes a first switch tube Q1, a second switch tube Q2, a first resistor R1 and a second resistor R2, the first resistor R1 and the second resistor R2 are connected in series between a second pin of the first switch tube Q1 and a second pin of the second switch tube Q2, a first pin of the first switch tube Q1 is electrically connected between the first resistor R1 and the second resistor R2, a second pin of the first switch tube Q1 is further electrically connected to the power module 300, a third pin of the first switch tube Q1 is electrically connected to the voltage conversion module 120, a first pin of the second switch tube Q2 is electrically connected to the embedded controller 200, a second pin of the second switch tube Q2 is electrically connected to the power-on signal processing unit 112, and a third pin of the second switch tube Q2 is grounded.
In this embodiment, the power-on signal processing unit 112 includes a third resistor R3, a first diode D1 and a second diode D2, the power-on signal providing module 400 is electrically connected to both the cathode of the first diode D1 and the cathode of the second diode D2, the anode of the first diode D1 is electrically connected to the embedded controller 200, one end of the third resistor R3 is electrically connected to the power module 300, the other end of the third resistor R3 is electrically connected between the anode of the first diode D1 and the embedded controller 200, and the anode of the second diode D2 is electrically connected to the switch unit 111.
It is understood that the anode of the second diode D2 is electrically connected to the second pin of the second switching tube Q2 of the switching unit 111. Since the power-on signal is a low signal, the cathodes of the first diode D1 and the second diode D2 are pulled low, so that the first diode D1 and the second diode D2 are turned on. After the second diode D2 is turned on, the power module 300, the second resistor R2, the first resistor R1, the second diode D2 and the power-on signal providing module 400 form a loop, the first resistor R1 and the second resistor R2 divide the voltage and provide a high level signal to the first pin of the first switch Q1, the first switch Q1 is turned on according to the high level signal, and then the third pin of the first switch Q1 generates an enable signal which is the high level signal.
After the first diode D1 is turned on, the anode of the second diode D2 is pulled low by the high signal to be a low signal, so the embedded controller 200 receives the power-on signal as a low signal. After receiving the power-on signal and the second working voltage provided by the voltage conversion module 120, the embedded controller 200 provides a start signal to the first pin of the second switch Q2, the second switch Q2 is turned on according to the start signal, when the power-on signal providing module 400 stops providing the power-on signal, the power module 300, the second resistor R2, the first resistor R1, the second diode D2 and the power-on signal providing module 400 are generated without a loop, however, the power module 300, the second resistor R2, the first resistor R1, and the second switch Q2 form a loop, the voltage division by the first resistor R1 and the second resistor R2 will continue to provide a high level signal to the first pin of the first switch Q1, the first switch Q1 will continue to be in a conducting state according to the high level signal, and the third pin of the first switch Q1 will continue to generate an enable signal as the high level signal. Further, it is ensured that the enable signal is continuously provided to the voltage conversion module 120 after the power-on signal providing module 400 stops providing the power-on signal.
In this embodiment, when the electronic device 10 is switched from the power-on state to the power-off state, the embedded controller 200 stops sending the start signal to the first pin of the second switch Q2 according to the system power-off signal, but sends the stop signal to the first pin of the second switch Q2, that is, the embedded controller 200 will pull down the level of the first pin of the second switch Q2 from high level to low level according to the system shutdown signal, the first pin of the second switch Q2 will be in the off state according to the stop signal, the power module 300, the second resistor R2, the first resistor R1, and the second switch Q2 have no loop generation, since the power-on signal providing module 400 does not generate the power-on signal, the first pin of the first switch Q1 does not generate the high level, the first switch Q1 is in the off state, and the third pin of the first switch Q1 does not generate the enable signal.
In this embodiment, the first switch tube Q1 and the second switch tube Q2 may be MOS (Metal Oxide Semiconductor) transistors or triodes. In this embodiment, the first switch Q1 and the second switch Q2 are MOS transistors, the first pin of the first switch Q1 and the second pin of the second switch Q2 are gates of the MOS transistors, the second pin of the first switch Q1 and the second switch Q2 are drains of the MOS transistors, and the third pin of the first switch Q1 and the second switch Q2 are sources of the MOS transistors.
Further, in the present embodiment, the voltage conversion module 120 includes a voltage conversion chip U1, an input terminal of the voltage conversion chip U1 is electrically connected to the power module 300, an enable terminal of the voltage conversion chip U1 is electrically connected to the enable control module 110, an enable terminal of the voltage conversion chip U1 is electrically connected to the charger 20, and an output terminal of the voltage conversion chip U1 is electrically connected to the embedded controller 200.
Further, in the present embodiment, the voltage conversion module 120 further includes a third diode D3 and a fourth diode D4, an anode of the third diode D3 is electrically connected to the enable control module 110, an anode of the fourth diode D4 is used for electrically connecting to the charger 20, and a cathode of the third diode D3 and a cathode of the fourth diode D4 are both electrically connected to the enable terminal of the voltage conversion chip U1.
In the present embodiment, when the third diode D3 is not provided, the enable terminal of the voltage conversion chip U1 is electrically connected to the third cathode of the first switching tube Q1 of the enable control module 110. When the third diode D3 is provided, the enable terminal of the voltage conversion chip U1 is electrically connected to the cathode of the third diode D3, and the anode of the third diode D3 is electrically connected to the third pin of the first switching tube Q1 of the enable control module 110.
It is understood that when the enable terminal of the voltage conversion chip U1 receives at least one of the charging signal and the enable signal, the voltage conversion chip U1 converts the first operating voltage received by the input terminal into the second operating voltage, and transmits the second operating voltage to the embedded controller 200 through the output terminal.
The third diode D3 prevents the charge signal provided by the fourth diode D4 from flowing back to the first switch Q1, thereby protecting the first switch Q1 from the current generated by other devices. The fourth diode D4 prevents the enable signal provided by the third diode D3 from flowing back to the charger 20, thereby protecting the charger 20 from the current generated by other devices.
Further, in the present embodiment, the voltage conversion module 120 further includes a first capacitor C1 and a second capacitor C2, the first capacitor C1 is electrically connected between the power module 300 and the ground, and the input terminal of the voltage conversion chip U1 is electrically connected between the power module 300 and the first capacitor C1. The second capacitor C2 is electrically connected between the output terminal of the voltage conversion chip U1 and ground. The first capacitor C1 and the second capacitor C2 both function as a filter.
In this embodiment, the voltage conversion chip U1 may be a LDO (Low Dropout Regulator).
In summary, the power supply control device and the electronic device provided in the embodiments of the present invention include an enable control module and a voltage conversion module, the electronic device includes an embedded controller, a power supply module and a power-on signal providing module, the enable control module is electrically connected to the voltage conversion module, the power supply module and the power-on signal providing module, the voltage conversion module is electrically connected to the embedded controller and the power supply module, the power supply module is electrically connected to a battery or a charger, and the voltage conversion module is electrically connected to the charger; the power supply module is used for supplying power to the voltage conversion module by using a first working voltage when the charger or the battery supplies power to the electronic equipment; when the charger supplies power to the electronic equipment, the voltage conversion module is used for receiving a charging signal sent by the charger and converting the first working voltage into a second working voltage according to the charging signal to supply power to the embedded controller; when the battery supplies power to the electronic equipment, the voltage conversion module is used for receiving an enabling signal sent by the enabling control module and converting the first working voltage into a second working voltage according to the enabling signal to supply power to the embedded controller; the enabling signal is generated when the enabling control module receives the starting signal sent by the starting signal providing module.
Therefore, the power supply control device can realize power supply to the embedded controller under two conditions of power supply of the charger and the battery only according to the enabling control module and the voltage conversion module, and the power supply control device consisting of the enabling control module and the voltage conversion module is simple in circuit, so that the cost is saved. Meanwhile, when the charger supplies power, a charging signal is generated, and the voltage conversion module can supply power to the embedded controller according to the charging signal; when the battery supplies power, the charger can not generate a charging signal, but the voltage conversion module can receive an enabling signal provided by the enabling control module when the starting signal is generated, so that when the battery supplies power, only whether the starting signal is generated or not needs to be considered, whether the charger is in an access state or in a pull-out state does not need to be considered, and the processing flow of the power supply control device is simpler.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A power supply control device is characterized by being applied to electronic equipment, wherein the power supply control device comprises an enabling control module and a voltage conversion module, the electronic equipment further comprises an embedded controller, a power supply module and a starting signal providing module, the enabling control module is electrically connected with the voltage conversion module, the power supply module and the starting signal providing module, the voltage conversion module is electrically connected with the embedded controller and the power supply module, the power supply module is electrically connected with a battery or a charger, and the voltage conversion module is electrically connected with the charger;
the power supply module is used for supplying power to the voltage conversion module by using a first working voltage when the charger or the battery supplies power to the electronic equipment;
when the charger supplies power to the electronic equipment, the voltage conversion module is used for receiving a charging signal sent by the charger and converting the first working voltage into a second working voltage according to the charging signal to supply power to the embedded controller;
when the battery supplies power to the electronic equipment, the voltage conversion module is used for receiving an enabling signal sent by the enabling control module and converting the first working voltage into a second working voltage according to the enabling signal to supply power to the embedded controller; the enabling signal is generated when the enabling control module receives the starting signal sent by the starting signal providing module; the enabling control module is electrically connected with the embedded controller;
the enabling control module is used for sending the enabling signal to the voltage conversion module and sending a starting-up prompting signal to the embedded controller when receiving the starting-up signal, so that the embedded controller sends a starting-up signal to the enabling control module;
the enabling control module is further used for continuously sending the enabling signal to the voltage conversion module according to the starting signal;
the enabling control module comprises a switch unit and a starting signal processing unit, the starting signal providing module is electrically connected with the embedded controller through the starting signal processing unit, and the switch unit is electrically connected with the embedded controller, the starting signal processing unit and the voltage conversion module;
the starting signal processing unit is used for receiving the starting signal and sending a starting prompt signal to the embedded controller;
the switch unit is used for receiving the starting signal and sending the enabling signal to the voltage conversion module.
2. The power supply control device of claim 1, wherein the electronic device further comprises a processor, the processor being electrically connected to the embedded controller;
and the embedded controller is used for sending the starting signal to the enabling control module when receiving a system starting signal provided by the processor.
3. The power supply control device according to claim 2, wherein the embedded controller is further configured to send a stop signal to the enable control module when receiving a system shutdown signal sent by the processor;
the enabling control module is further used for stopping sending the enabling signal to the voltage conversion module when the stopping signal is received.
4. The power supply control device according to claim 1, wherein the switch unit includes a first switch tube, a second switch tube, a first resistor and a second resistor, the first resistor and the second resistor are connected in series between a second pin of the first switch tube and a second pin of the second switch tube, the first pin of the first switch tube is electrically connected between the first resistor and the second resistor, the second pin of the first switch tube is further electrically connected to the power module, a third pin of the first switch tube is electrically connected to the voltage conversion module, the first pin of the second switch tube is electrically connected to the embedded controller, the second pin of the second switch tube is electrically connected to the power-on signal processing unit, and the third pin of the second switch tube is grounded.
5. The power supply control device according to claim 1, wherein the power-on signal processing unit includes a third resistor, a first diode and a second diode, the power-on signal providing module is electrically connected to both a cathode of the first diode and a cathode of the second diode, an anode of the first diode is electrically connected to the embedded controller, one end of the third resistor is electrically connected to the power module, the other end of the third resistor is electrically connected between the anode of the first diode and the embedded controller, and an anode of the second diode is electrically connected to the switching unit.
6. The power supply control device according to claim 1, wherein the voltage conversion module comprises a voltage conversion chip, an input end of the voltage conversion chip is electrically connected to the power module, an enable end of the voltage conversion chip is electrically connected to the enable control module, an enable end of the voltage conversion chip is used for being electrically connected to the charger, and an output end of the voltage conversion chip is electrically connected to the embedded controller.
7. The power supply control device according to claim 6, wherein the voltage conversion module further comprises a third diode and a fourth diode, an anode of the third diode is electrically connected to the enable control module, an anode of the fourth diode is used for being electrically connected to the charger, and a cathode of the third diode and a cathode of the fourth diode are both electrically connected to the enable terminal of the voltage conversion chip.
8. An electronic device comprising an embedded controller, a power supply module, a power-on signal providing module and a power supply control apparatus according to any one of claims 1 to 7.
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| CN202010151038.4A CN111399617B (en) | 2020-03-06 | 2020-03-06 | Power supply control device and electronic apparatus |
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