CN109840006A - Main control chip power supply unit - Google Patents
Main control chip power supply unit Download PDFInfo
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- CN109840006A CN109840006A CN201910123240.3A CN201910123240A CN109840006A CN 109840006 A CN109840006 A CN 109840006A CN 201910123240 A CN201910123240 A CN 201910123240A CN 109840006 A CN109840006 A CN 109840006A
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Abstract
The present invention provides a kind of main control chip power supply units, are related to integrated circuit fields.By the way that trigger module is electrically connected with the enable signal input terminal of power control module, the first power supply chip respectively, battery is electrically connected with the power supply signal input of the first power supply chip, trigger module and power control module respectively, main control chip is electrically connected with the enable signal input terminal of the output end of the first power supply chip, power control module respectively, main control chip generates power-off signal and is transmitted to power control module after detecting power-off signal；Power control module executes the operation of power-off according to power-off signal, so that battery is grounded, to generate low level signal to the first power supply chip, to terminate the first power supply chip for the battery output voltage of conversion as main control chip continued power, so that battery is no longer main control chip power supply when needing to carry out power saving, to extend the use time of battery, energy conservation and environmental protection.
Description
Technical field
The present invention relates to integrated circuit fields, in particular to a kind of main control chip power supply unit.
Background technique
Embedded controller (Embed Controller, EC), also referred to as keyboard controller (KBC, Keyboard
It Controller is) the core electron element of intelligent terminal.Intelligent terminal booting after, EC for keyboard, indicator light, fan,
The working condition of the elements such as Trackpad.In addition to this, EC also controls the working conditions such as the standby of system, suspend mode.Currently, intelligence
Terminal is either in booting, off-mode, or in states such as standby, suspend mode, EC is always maintained at operation.Only by power supply
Equipment device and battary removal, intelligent terminal do not have the input of power supply, and EC can just be closed.Therefore, when intelligent terminal uses battery
When power supply, due to the power consumption always of EC, reduce battery uses the time, and user is caused continually to need to fill battery
Electricity, user experience is poor, is also not energy-saving and environment-friendly.
Summary of the invention
The purpose of the present invention is to provide a kind of main control chip power supply units, are intended to improve above-mentioned problem.
A kind of main control chip power supply unit provided in an embodiment of the present invention, the main control chip power supply unit includes trigger mode
Block, power control module, main control chip, battery and the first power supply chip, the trigger module is respectively with described for automatically controlled
Molding block, first power supply chip enable signal input terminal electrical connection, the battery respectively with the first power supply core
The power supply signal input of piece, the trigger module and the power control module electrical connection, the main control chip respectively with
The enable signal input terminal electrical connection of the output end, the power control module of first power supply chip；
Enable signal of the trigger module for exporting high level to first power supply chip when being triggered inputs
End, to control first power supply chip for the battery output voltage of conversion for the main control chip instantaneous power, so that institute
It states main control chip and exports high level signal to the power control module；
The power control module is used to receive the low level signal of the trigger module output and receives the master control
After the high level signal of chip output, the enable signal input terminal of output high level signal to first power supply chip, so that
The battery output voltage of conversion is the main control chip continued power by first power supply chip；
The main control chip is used for after detecting power-off signal, is generated power-off signal and is transmitted to the power supply control
Module；
The power control module is used to execute the operation of power-off according to the power-off signal, generates low level signal to institute
The enable signal input terminal of the first power supply chip is stated, so that first power supply chip terminates to convert the output electricity of the battery
Pressure is that the main control chip is powered.
Further, the trigger module include external power supply trigger unit, power on trigger unit, the first control module with
And first NMOS tube；The external power supply trigger unit is electrically connected with the first level input of first control module, institute
Power on trigger unit is stated to be electrically connected with the second electrical level input terminal of first control module；The output of first control module
End is connected with the grid of first NMOS tube, the drain electrode and the enable signal of first power supply chip of first NMOS tube
Input terminal is connected, and the drain electrode of first NMOS tube, source electrode are serially connected between the battery and ground；
The external power supply trigger unit is used for when receiving the voltage signal of external power supply transmission, and be triggered generation the
One level signal；The power on trigger unit is for being responsive to generation second electrical level signal when pressing operation is triggered；
First control module is for exporting low electricity when receiving first level signal and second electrical level signal
Ordinary mail number, so that first NMOS tube remains open, so that the enable signal input terminal of first power supply chip obtains height
Level signal.
Further, the external power supply trigger unit includes first resistor, second resistance and second source chip, institute
State first resistor, the second resistance is serially connected between external power supply input terminal and ground, the second source chip includes voltage
Signal input part and enable signal input terminal, the voltage signal inputs be electrically connected to the external power supply input terminal with it is described
Between first resistor, the enable signal input terminal is electrically connected between the first resistor and the second resistance, and described
Enable signal input terminal is also electric with the third of the first level input of first control module and second control module
Flat input terminal electrical connection, the output end of the second source chip are connected with the main control chip.
Further, the power on trigger unit includes trigger switch, the trigger switch and first control module
Second electrical level input terminal electrical connection.
Further, the power on trigger unit further includes phase inverter, the phase inverter be serially connected with the trigger switch with
Between the second electrical level input terminal.
Further, the power on trigger unit further includes delay circuit, and the delay circuit is serially connected with the triggering and opens
It closes between the second electrical level input terminal.
Further, the delay circuit includes first diode and capacitor, the anode of the first diode with it is described
Trigger switch electrical connection, the cathode of the first diode are electrically connected with first control module, one end electricity of the capacitor
It is connected between the cathode of the diode and first control module, the other end ground connection of the capacitor.
Further, the main control chip power supply unit further includes the second diode, third diode, the two or two pole
The anode of pipe is electrically connected with the drain electrode of first NMOS tube, the cathode of second diode and first power supply chip electricity
Connection；The third diode anode be electrically connected with the drain electrode of second NMOS tube, the cathode of the third diode and
The first power supply chip electrical connection.
Further, the power control module includes the 4th diode, the 5th diode and divider resistance, and described the
The cathode of four diodes is electrically connected with the power on trigger unit, the cathode of the 4th diode and first control module
The electrical connection of second electrical level input terminal, anode and the second electrical level input terminal of first control module of the 5th diode
Electrical connection, the cathode of the 5th diode are electrically connected with the main control chip, one end of the divider resistance and the electric power storage
Pond electrical connection, the other end of the divider resistance and the 4th diode, the 5th diode and first control module
Electrical connection；4th diode, the 5th diode constitute AND gate circuit, when first level signal is low level letter
Number, when the second electrical level signal is high level signal,
The unidentified high level to transmission after off signal of the main control chip that the AND gate circuit is used to obtain
Signal and the second electrical level signal are carried out with operation output high level signal to first control module, so that described first
Control module exports low level signal, so that first NMOS tube remains open, so that first power supply chip
Enable signal input terminal obtains high level signal；
The AND gate circuit is also used to recognizing the main control chip obtained into the low level transmitted after off signal
Signal and the second electrical level signal are carried out with operation output low level signal to first control module, so that described first
Control module exports high level signal, so that first NMOS transistor conduction, so that first power supply chip is enabled
Signal input part obtains low level signal.
Further, the power control module includes the second control module, the second NMOS tube, second control module
The first enable signal input terminal be electrically connected with the main control chip, the second enable signal input terminal of second control module
It is electrically connected with the output end of the trigger module, the grid of second NMOS tube, drain electrode are serially connected with second control module
Between the enable signal input terminal of first power supply chip, the drain electrode of second NMOS tube, source electrode are serially connected with the storage
Between battery and ground；
Second control module is used for when the second enable signal input terminal is low level and does not receive the master
When controlling the power-off signal of chip transmission, low level signal is exported, so that second NMOS tube remains open, so that described first
The enable signal input terminal of power supply chip obtains high level signal；
Second control module is also used to export high level when receiving the power-off signal of the main control chip transmission
Signal, so that second NMOS transistor conduction, so that the enable signal input terminal of first power supply chip obtains low level letter
Number.
The beneficial effect of main control chip power supply unit provided by the invention is: trigger module respectively with power control module,
The enable signal input terminal of first power supply chip is electrically connected, battery respectively with the power supply signal input of the first power supply chip,
Trigger module and power control module electrical connection, main control chip respectively with the output end of the first power supply chip, power supply control mould
The enable signal input terminal of block is electrically connected, and main control chip generates power-off signal and be transmitted to confession after detecting power-off signal
Electric control module；Power control module executes the operation of power-off according to power-off signal, generates low level signal to the first power supply core
The enable signal input terminal of piece, so that the first power supply chip terminates to convert battery output voltage to be main control chip continued power,
So that battery is no longer main control chip power supply when needing to carry out power saving, to extend the use time of battery, nothing
User is needed continually to charge the battery, energy conservation and environmental protection.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the circuit connection block diagram of main control chip power supply unit provided in an embodiment of the present invention；
Fig. 2 is that the physical circuit of trigger module provided in an embodiment of the present invention connects block diagram；
Fig. 3 is the circuit connection block diagram of the first power supply chip provided in an embodiment of the present invention；
Fig. 4 is the circuit connection block diagram of main control chip provided in an embodiment of the present invention；
Fig. 5 is that the main control chip of the power control module provided in an embodiment of the present invention including one of embodiment supplies
The circuit diagram of electric installation；
Fig. 6 is the circuit diagram of the power control module in Fig. 5；
Fig. 7 is that the main control chip of the power control module provided in an embodiment of the present invention including another embodiment is powered
The circuit diagram of device；
Fig. 8 is the circuit diagram of the power control module in Fig. 7.
Icon: 101- main control chip；102- battery；103- trigger module；104- external power supply trigger unit；105- is opened
Machine trigger unit；The first power supply chip of 106-；107- second source chip；108- trigger switch；109- phase inverter；110- delay
Circuit；The first control module of 111-；The second control module of 112-；The first NMOS tube of 113-；The second NMOS tube of 114-；115- charging
Interface；116- power-supply device device；117- power control module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put or those skilled in the art orientation or position that usually understand
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the equipment of indication or suggestion meaning or element are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply
Relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to connect；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, it can be the connection inside two elements.For the ordinary skill in the art, can be understood with concrete condition above-mentioned
The concrete meaning of term in the present invention.
Embodiment
Referring to Fig. 1, being applied to intelligent terminal the embodiment of the invention provides a kind of main control chip power supply unit.Such as Fig. 1
It is shown, main control chip power supply unit include trigger module 103, power control module 117, main control chip 101, battery 102 with
And first power supply chip 106.Main control chip 101 is integrated with embedded controller (Embed Controller, EC).Trigger module
The 103 enable signal input terminal respectively with power control module 117, the first power supply chip 106 is electrically connected, battery 102
It is electrically connected respectively with the power supply signal input of the first power supply chip 106, trigger module 103 and power control module 117.It is main
Control chip 101 is electrically connected with the enable signal input terminal of the output end of the first power supply chip 106, power control module 117 respectively.
Trigger module 103 is used to export the enable signal input terminal of high level to the first power supply chip 106 when being triggered,
To control the first power supply chip 106 for 102 output voltage of battery of conversion as 101 instantaneous power of main control chip, so that master control
Chip 101 exports high level signal to power control module.
Power control module 117 is used to receive the low level signal of the output of trigger module 103 and receives main control chip 101
After the high level signal of output, the enable signal input terminal of output high level signal to the first power supply chip 106, so that the first electricity
102 output voltage of battery of conversion is 101 continued power of main control chip by source chip 106.
Main control chip 101 is used for after detecting power-off signal, is generated power-off signal and is transmitted to power control module
117。
Power control module 117 is used to execute the operation of power-off according to power-off signal, so that battery 102 is grounded, thus
Low level signal is generated to the first power supply chip 106, so that the first power supply chip 106 terminates the output electricity of conversion battery 102
Pressure is that main control chip 101 is powered.
The main control chip power supply unit provided in the present embodiment in normal operation, by by trigger module 103, supply
Electric control module 117 and the first power supply chip 106 are sequentially connected electrically, as shown in Figure 1, battery 102 respectively with the first power supply
Power supply signal input, trigger module 103 and the power control module 117 of chip 106, main control chip 101 is respectively with first
The enable signal input terminal electrical connection of the output end, power control module 117 of power supply chip 106, main control chip 101 are detecting
After power-off signal, generates power-off signal and be transmitted to power control module 117；Power control module 117 is according to power-off signal
The operation of power-off is executed, the enable signal input terminal of low level signal to the first power supply chip 106 is generated, so that the first power supply core
Piece 106 terminates the output voltage of conversion battery 102 for the power supply of main control chip 117, so that battery 102 is needing to carry out
It is no longer that main control chip 117 is powered when power saving, so that the use time of battery is extended, without user continually to battery
102 charge, energy conservation and environmental protection.
Specifically, in one embodiment, as shown in Fig. 2, trigger module includes external power supply trigger unit, booting touching
Bill member, the first control module and the first NMOS tube.Main control chip power supply unit further includes charging interface 115 and power-supply device
Device 116, charging interface 115 are electrically connected with power-supply device device 116, and charging interface 115 and external power supply are plugged to power-supply device device
116 provide external power supply.
External power supply trigger unit 104 is electrically connected with the first level input of the first control module 111, and booting triggering is single
Member 105 is electrically connected with the second electrical level input terminal of the first control module 111；The power supply signal input of first control module 111
It is connected with battery 102, the output end of the first control module 111 is connected with the grid of the first NMOS tube 113, the first NMOS tube
113 drain electrode is connected with the enable signal input terminal of the first power supply chip 106, and the drain electrode of the first NMOS tube 113, source electrode are serially connected with
Between battery and ground.
External power supply trigger unit 104 is used for when receiving the voltage signal of external power supply transmission, and be triggered generation the
One level signal；Power on trigger unit 105 is for being responsive to generation second electrical level signal, the first level when pressing operation is triggered
Signal, second electrical level signal collectively form power on signal.
Further, the first control module 111 is used for the output when receiving the first level signal and second electrical level signal
Low level signal, so that the first NMOS tube 113 remains open, as shown in Figure 2, the voltage signal of battery 102 passes through the 4th electricity
Resistance R4 is connect with the drain electrode of the first NMOS tube 113, and the drain electrode of the first NMOS tube 113 passes through the second diode D2 and the first power supply
The enable signal input terminal of chip 106 is connected, and when the first NMOS tube 113 remains open, the voltage signal of battery 102 passes through
4th resistance R4 and the second diode D2 exports high level signal to the enable signal input terminal of the first power supply chip 106, thus
The first power supply chip 106 is set to convert the voltage of battery 102 to the supply voltage of main control chip 101, to start main control chip
101 and under accumulator status for main control chip 101 power.Further, external power supply trigger unit 104 includes first resistor
R1, second resistance R2 and second source chip 107.First resistor R1, second resistance R2 be serially connected with external power supply input terminal with
Between ground (in the present embodiment, external power supply input terminal is the output end of power-supply device device 116), second source chip 107 is wrapped
Voltage signal inputs and enable signal input terminal are included, voltage signal inputs are electrically connected to external power supply input terminal and the first electricity
It hinders between R1, enable signal input terminal is electrically connected between first resistor R1 and second resistance R2, and enable signal input terminal is also
It is electrically connected with the third level input of the first level input of the first control module 111, the second control module 112, second
The output end of power supply chip 107 is connect with main control chip 101.
Specifically, it presets when the enable signal that corresponding enable signal input terminal inputs is high level, the first power supply core
Piece 106 and the normally enabled work of second source chip 107；When the first level input input low level signal and second electrical level is defeated
When entering to hold input high level signal, first control unit 111 exports low level signal to the first NMOS tube.
In addition, when power-supply device device 116 is connect by power supply interface 115 with external power supply, first resistor R1 and second
There are branch pressure voltages between resistance R2, generate high level signal and are exported respectively to the enable signal input of second source chip 107
It holds, the first level input of the first control module 111.At this point, the normally enabled work of second source chip 107, second source
The external power supply that chip 107 receives voltage signal inputs, which is converted to, to be the supply voltage that main control chip 101 is powered,
External power supply is the power supply of main control chip 101 by second source chip 107.At this point, the first control module 111 output high level letter
Number the first NMOS tube 113 will be made by the first NMOS tube with the first power supply chip 106 to make the first NMOS transistor conduction
Can signal input part battery ground connection, to make the enable signal input terminal low level of the first power supply chip 106, at this time the
One power supply chip 106, which will not convert battery voltage to, to be the supply voltage that main control chip 101 is powered, namely at this time will not
It is the power supply of main control chip 101 using battery 102.
When power-supply device device 116 is connect by power supply interface 115 with external power supply, the operation consumption of main control chip 101
Electric energy can be supplemented by external power supply, without 102 electricity of battery of consumption, at this point, normal continuous is main control chip 101
Power supply, trigger module 103 and power control module 117 do not work.When accessing external power supply, trigger module 103 and confession are automatically controlled
Molding block 117 does not work, and increases the application flexibility of main control chip power supply unit.
In addition, when power-supply device device 116 is not connect by power supply interface 115 with external power supply, first resistor R1 and the
There are branch pressure voltages between two resistance R2, generate low level signal at this time and are exported respectively to the enabled letter of second source chip 107
The third level input of number input terminal, the first level input of the first control module 111 and the second control module 112.This
When, since enable signal input terminal is low level signal, second source chip 107 does not work.At this point, when being responsive to starting-up signal
When, power on trigger unit 105 generates second electrical level signal and is input to the second electrical level input terminal of first control unit 111.
Specifically, as shown in Fig. 2, power on trigger unit 105 includes trigger switch 108, trigger switch 108 and the first control
The second electrical level input terminal of module 111 is electrically connected.When trigger switch 108 is triggered by user, high level signal is generated, by the
Two level inputs input the first control module 111, at this point, above-mentioned second electrical level signal is high level signal.
Under normal conditions, when user carries out the operation of booting to intelligent terminal, the trigger switch 108 of intelligent terminal can with
The finger at family resets after recalling pressing, therefore, is pressed in a flash in trigger switch 108, trigger switch 108 is transmitted to second
The signal of level input is switched to low level (triggering powers off) by high level, then and rapidly switches back into high electricity from low level
It is flat.And since trigger switch 108 nearby includes other electronic circuits of intelligent terminal, trigger switch 108 is locating when being triggered
Low level signal on electronic circuit, which is easy to be interfered, becomes high level signal, so that the first control module 111 is judged by accident,
Cause battery 102 that cannot normally power on for main control chip 101.Therefore, which further includes phase inverter 109,
Phase inverter 109 is serially connected between trigger switch 108 and second electrical level input terminal, at this point it is possible to set second electrical level signal to
Low level signal.Understand when the trigger switch 108 of intelligent terminal and be resetted after the finger of user recalls pressing, therefore, is opened in triggering
Close and 108 be pressed in a flash, be transmitted to after the conversion of the inverted device 109 of trigger switch 108 signal of second electrical level input terminal by
Low level is switched to high level, then and rapidly switches back into low level from high level, thus when trigger switch 108 is triggered, institute
High level signal on the electronic circuit at place will not be disturbed.
In addition, during powering on, it is contemplated that trigger switch 108 be pressed (time pressed does not have in a flash
The time of the pressing of lower electric process is long), the signal that trigger switch 108 is transmitted to second electrical level input terminal is switched to low by high level
Level, then trigger switch 108 resets rapidly again, and trigger switch 108 is transmitted to the signal of second electrical level input terminal from low level
Switch back into high level.When being only switched to low level by high level in the signal that trigger switch 108 is transmitted to second electrical level input terminal
In a flash, power on signal could be constituted with the first above-mentioned level signal to be identified by the first control module 111, in this way may
The first control module 111 is caused to have little time to identify power on signal, low level signal has been reset to high level signal, leads
Cause battery 102 that cannot normally power on for main control chip 101, therefore, power on trigger unit 105 can also include delay circuit
110, delay circuit 110 is serially connected between trigger switch 108 and second electrical level input terminal, and delay circuit 110 can postpone low electricity
The flat time maintained, so that the first control module 111 can identify power on signal, so that battery 102 can be with
Normally powered on for main control chip 101.
Specifically, as shown in Fig. 2, delay circuit 110 may include first diode D1 and capacitor, first diode D1's
Anode is electrically connected with trigger switch 108, and the cathode of first diode D1 is electrically connected with the first control module 111, one end of capacitor
It is electrically connected between the cathode of diode and the first control module 111, the other end ground connection of capacitor.
It the use of external power supply is main control chip power supply, trigger module by upper analysis it is found that when there is external power supply access
103 do not work with power control module 117；When the access of no external power supply is the power supply of main control chip 101 and detects booting touching
When signalling, trigger module 103 can provide short-duration power for main control chip 101, to start main control chip 101, in order to guarantee
Main control chip 101 is continuously using battery 102 to power, and after main control chip 101 is triggered the triggering starting of module 103, is generated
High level signal is to power control module 117, so that power control module 117 is when no external power supply accesses, according to master control core
The high level signal that piece 101 exports exports the enable signal input terminal of high level signal to the first power supply chip 106, so that first
The supply voltage that battery voltage is converted to main control chip 101 is 101 continued power of main control chip by power supply chip 106.
As one of embodiment, as shown in Figure 5, Figure 6, power control module 117 includes the second control module
112, the first enable signal input terminal of the second NMOS tube 114, the second control module 112 is electrically connected with main control chip 101, and second
Second enable signal input terminal of control module 118 is electrically connected with the output end of trigger module 103, in the present embodiment, the second control
Second enable signal input terminal of molding block 118 is connected to first resistor R1 and second resistance R2 in external power supply trigger unit
Between, to obtain branch pressure voltage signal when accessing external power supply, the grid of the second NMOS tube 114, drain electrode are serially connected with the second control
Between molding block 118 and the enable signal input terminal of the first power supply chip 106, the drain electrode of the second NMOS tube 114, source electrode are serially connected with
Between battery 102 and ground.
Second control module 118 is used to be low level signal in the second enable signal input terminal and not receive master control core
When the power-off signal that piece 101 transmits, low level signal is exported, further, as shown in fig. 6, battery 102 passes through 3rd resistor
R3 is connected with the drain electrode of the second NMOS tube 114, and the drain electrode of the second NMOS tube 114 passes through third diode D3 and the first power supply chip
106 enable signal is entered end and is connected, and when the second control module 118 exports low level signal, the second NMOS tube 114 is kept
It disconnects, at this point, battery 102 is defeated by the enable signal of 3rd resistor R3 and third diode D3 to the first power supply chip 106
Enter end output high level signal, further, so that the first power supply chip 106 be made to convert master control for the voltage of battery 102
The supply voltage of chip 101 is the power supply of main control chip 101.It realizes in the access of no external power supply equipment and opening of device state
It is the power supply of main control chip 101 using battery 102 when lower normal use.
Second control module 118 is also used to when receiving the power-off signal of the transmission of main control chip 101, output high level letter
Number, so that the second NMOS tube 114 is connected, when the conducting of the second NMOS tube 114, the battery 102 connecting with the second NMOS tube is logical
The second NMOS transistor conduction is crossed to ground, at this point, the enable signal input terminal of the first power supply chip 106 is low level signal, the first electricity
Source chip 106 stops working, i.e., when no external power supply equipment and when detecting the power-off signal of main control chip, the first power supply chip
106 terminate conversion battery voltage as main control chip power supply, that is to say, that needing battery in the access of no external power supply is master control
When chip power supply and equipment shutdown, main control chip is powered off, to save the electricity of battery 102.
In another embodiment, as shown in Figure 7, Figure 8, power control module 117 includes the 4th diode D4, the
Five diode D5 and divider resistance, the cathode of the 4th diode D4 is electrically connected with power on trigger unit 103 (is having phase inverter
It in the case where 109, is connect with the output end of phase inverter 109).The of the cathode of 4th diode D4 and the first control module 111
The anode of the electrical connection of two level inputs, the 5th diode D5 is electrically connected with the second electrical level input terminal of the first control module 111,
The cathode of 5th diode D5 is electrically connected with main control chip 101.One end of divider resistance is electrically connected (battery with battery 102
102 power for divider resistance after dividing), the other end of divider resistance and the 4th diode D4, the 5th diode D5 and
The electrical connection of first control module 111；4th diode D4, the 5th diode D5 constitute AND gate circuit.
When the first level signal is low level signal, and second electrical level signal is high level signal, AND gate circuit is used for will
The unidentified high level signal and second electrical level signal to transmission after off signal of the main control chip 101 of acquisition carries out and operation
High level signal is exported to the first control module 111, so that the first control module 111 exports low level signal, so that the
One NMOS tube 113 remains open, so that the first power supply chip 106 obtains high level signal.
AND gate circuit be also used to recognize the main control chip 101 of acquisition the low level signal transmitted after off signal and
Second electrical level signal export with operation low level signal to the first control module 111, so that the first control module 111 exports
High level signal, so that the first NMOS tube 113 is connected, so that the first power supply chip 106 obtains low level signal.
Specifically, main control chip 101 can be preset and access the level signal EC_OFF of the 5th diode D5 cathode as height
Level signal.When the access of no external power supply equipment, external power supply trigger unit generates low level signal and is input to the first control
First level input of module 111, if detecting, switch triggering is operated, and switch triggering unit generates high level signal and is input to
The cathode of 4th diode D4, in no off signal, the level that main control chip 101 accesses the 5th diode D5 cathode remains high
Level, according to AND gate circuit, at this point, the second electrical level input terminal for being input to the first control module 111 is high level signal, the
One control module 111 exports low level signal to the first NMOS tube, and the first NMOS tube 113 disconnects, and the first power supply chip 106 is enabled
End obtains high level signal, and it is main control chip that battery voltage is converted 101 supply voltage of main control chip by the first power supply chip
101 power supplies.It realizes when the power supply of no external power supply and opening of device in use, the use of battery being main control chip power supply.Into one
It step ground can be by EC_OFF by high level signal if main control chip detects off signal when the access of no external power supply equipment
It is set to low level signal, AND gate circuit will export low level signal to the first control module 111, the first control module at this time
111 output high level signals to the first NMOS tube, the conducting of the first NMOS tube 113,106 enable end of the first power supply chip obtains low electricity
Ordinary mail number, the first power supply chip 106 stop working, and realize that in the access of no external power supply equipment be master control core using battery 102
When piece 101 is powered, when detecting that off signal i.e. equipment is closed, main control chip 101 is powered off, is realized using based on battery
When controlling chip power supply, stops being that main control chip 101 is powered if equipment is closed and do not used, effectively save battery 102
Electricity extends equipment and uses the time.
In the present embodiment, the first control module 111 uses the first decoder, and the second control module 112 is using the second decoding
Device.
In addition, main control chip power supply unit further includes the second diode D2, third diode D3, the second diode D2 is just
Pole is electrically connected with the drain electrode of the first NMOS tube 113, and the cathode of the second diode D2 is electrically connected with the first power supply chip 106；Third
The anode of diode D3 is electrically connected with the drain electrode of the second NMOS tube 114, the cathode of third diode D3 and the first power supply chip 106
Electrical connection.The one-way conduction that can use the second diode D2, third diode D3 is set in this way, prevents the first NMOS tube
The voltage of 113 locating route flows backward route locating for the second NMOS tube 114, is also possible to prevent 114 institute of the second NMOS tube
The voltage of the route at place flows backward route locating for the first NMOS tube 113.
In conclusion main control chip power supply unit provided by the invention, by by trigger module, power control module and
The enable signal input terminal of first power supply chip is sequentially connected electrically, and battery is inputted with the power supply signal of the first power supply chip respectively
End, trigger module and power control module electrical connection, main control chip respectively with the output end of the first power supply chip, power supply control
The enable signal input terminal of module is electrically connected, and main control chip generates power-off signal and be transmitted to after detecting power-off signal
Power control module；Power control module executes the operation of power-off according to power-off signal, so that battery is grounded, to generate low
Level signal is continued the battery output voltage of conversion as main control chip using terminating the first power supply chip to the first power supply chip
Power supply, so that battery is no longer main control chip power supply when needing to carry out power saving, thus when extending the use of battery
Between, it is continually charged the battery without user, energy conservation and environmental protection.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of main control chip power supply unit, which is characterized in that the main control chip power supply unit includes trigger module, for automatically controlled
Molding block, main control chip, battery and the first power supply chip, the trigger module respectively with the power control module, institute
The enable signal input terminal electrical connection of the first power supply chip is stated, the battery is believed with the power supply of first power supply chip respectively
Number input terminal, the trigger module and power control module electrical connection, the main control chip respectively with first electricity
The enable signal input terminal electrical connection of the output end of source chip, the power control module；
The trigger module is used to export the enable signal input terminal of high level to first power supply chip when being triggered, with
It is the main control chip instantaneous power that first power supply chip, which is controlled, by the battery output voltage of conversion, so that the master control
Chip exports high level signal to the power control module；
The power control module is used to receive the low level signal of the trigger module output and receives the main control chip
After the high level signal of output, the enable signal input terminal of output high level signal to first power supply chip, so that described
The battery output voltage of conversion is the main control chip continued power by the first power supply chip；
The main control chip is used for after detecting power-off signal, is generated power-off signal and is transmitted to the power supply control mould
Block；
The power control module is used to execute the operation of power-off according to the power-off signal, generates low level signal to described the
The enable signal input terminal of one power supply chip, so that the output voltage that first power supply chip terminates to convert the battery is
The main control chip power supply.
2. main control chip power supply unit according to claim 1, which is characterized in that the trigger module includes external power supply
Trigger unit, power on trigger unit, the first control module and the first NMOS tube；The external power supply trigger unit and described the
First level input of one control module is electrically connected, the second electrical level of the power on trigger unit and first control module
Input terminal electrical connection；The output end of first control module is connected with the grid of first NMOS tube, the first NMOS
The drain electrode of pipe is connected with the enable signal input terminal of first power supply chip, the drain electrode of first NMOS tube, source electrode concatenation
Between the battery and ground；
The external power supply trigger unit is used for when receiving the voltage signal of external power supply transmission, and be triggered the first electricity of generation
Ordinary mail number；The power on trigger unit is for being responsive to generation second electrical level signal when pressing operation is triggered, the first level letter
Number, second electrical level signal collectively form power on signal；
First control module is used to export low level letter when receiving first level signal and second electrical level signal
Number, so that first NMOS tube remains open, so that the enable signal input terminal of first power supply chip obtains high level
Signal.
3. main control chip power supply unit according to claim 2, which is characterized in that the external power supply trigger unit includes
First resistor, second resistance and second source chip, the first resistor, the second resistance are serially connected with external power supply input
Between end and ground, the second source chip includes voltage signal inputs and enable signal input terminal, and the voltage signal is defeated
Enter end to be electrically connected between the external power supply input terminal and the first resistor, the enable signal input terminal is electrically connected to institute
It states between first resistor and the second resistance, and the enable signal input terminal is also electric with the first of first control module
Flat input terminal and the third level input of second control module electrical connection, the output end of the second source chip with
The main control chip is connected.
4. main control chip power supply unit according to claim 2, which is characterized in that the power on trigger unit includes triggering
Switch, the trigger switch are electrically connected with the second electrical level input terminal of first control module.
5. main control chip power supply unit according to claim 4, which is characterized in that the power on trigger unit further includes anti-
Phase device, the phase inverter are serially connected between the trigger switch and the second electrical level input terminal.
6. main control chip power supply unit according to claim 4, which is characterized in that the power on trigger unit further includes prolonging
When circuit, the delay circuit is serially connected between the trigger switch and the second electrical level input terminal.
7. main control chip power supply unit according to claim 6, which is characterized in that the delay circuit includes the one or two pole
Pipe and capacitor, the first diode anode be electrically connected with the trigger switch, the cathode of the first diode with it is described
First control module electrical connection, one end of the capacitor be electrically connected to the diode cathode and first control module it
Between, the other end of the capacitor is grounded.
8. main control chip power supply unit according to claim 2, which is characterized in that the main control chip power supply unit is also wrapped
The second diode, third diode are included, the anode of second diode is electrically connected with the drain electrode of first NMOS tube, described
The cathode of second diode is electrically connected with first power supply chip；Anode and second NMOS tube of the third diode
Drain electrode electrical connection, the cathode of the third diode is electrically connected with first power supply chip.
9. main control chip power supply unit according to claim 2, which is characterized in that the power control module includes the 4th
The cathode of diode, the 5th diode and divider resistance, the 4th diode is electrically connected with the power on trigger unit, institute
The cathode for stating the 4th diode is electrically connected with the second electrical level input terminal of first control module, and the 5th diode is just
Pole is electrically connected with the second electrical level input terminal of first control module, the cathode and the main control chip of the 5th diode
Electrical connection, one end of the divider resistance are electrically connected with the battery, the other end of the divider resistance and the described 4th 2
Pole pipe, the 5th diode and first control module electrical connection；4th diode, the 5th diode constitute with
Gate circuit, when first level signal is low level signal, and the second electrical level signal is high level signal,
The unidentified high level signal to transmission after off signal of the main control chip that the AND gate circuit is used to obtain
It is carried out with the second electrical level signal and operates output high level signal to first control module, so that first control
Module exports low level signal, so that first NMOS tube remains open, so that first power supply chip is enabled
Signal input part obtains high level signal；
After the AND gate circuit is also used to the main control chip of the second electrical level signal and acquisition recognizing off signal
And the low level signal transmitted export with operation low level signal to first control module, so that first control
Module exports high level signal, so that first NMOS transistor conduction, so that the enable signal of first power supply chip
Input terminal obtains low level signal.
10. main control chip power supply unit according to claim 1, which is characterized in that the power control module includes the
Two control modules, the second NMOS tube, the first enable signal input terminal and the main control chip of second control module are electrically connected
It connecing, the second enable signal input terminal of second control module is electrically connected with the output end of the trigger module, and described second
The grid of NMOS tube, drain electrode be serially connected with second control module and first power supply chip enable signal input terminal it
Between, the drain electrode of second NMOS tube, source electrode are serially connected between the battery and ground；
Second control module is used for when the second enable signal input terminal is low level signal and does not receive the master
When controlling the power-off signal of chip transmission, low level signal is exported, so that second NMOS tube remains open, so that described first
The enable signal input terminal of power supply chip obtains high level signal；
Second control module is also used to when receiving the power-off signal of the main control chip transmission, output high level letter
Number, so that second NMOS transistor conduction, so that the enable signal input terminal of first power supply chip obtains low level signal.
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| CN201910123240.3A CN109840006B (en) | 2019-02-19 | 2019-02-19 | Main control chip power supply device |
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| CN201910123240.3A CN109840006B (en) | 2019-02-19 | 2019-02-19 | Main control chip power supply device |
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| CN109840006B (en) | 2020-10-16 |
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