CN107579588A - A kind of supply unit and mobile terminal for mobile terminal - Google Patents
A kind of supply unit and mobile terminal for mobile terminal Download PDFInfo
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- CN107579588A CN107579588A CN201711011322.6A CN201711011322A CN107579588A CN 107579588 A CN107579588 A CN 107579588A CN 201711011322 A CN201711011322 A CN 201711011322A CN 107579588 A CN107579588 A CN 107579588A
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Abstract
The invention discloses a kind of supply unit and mobile terminal for mobile terminal, the supply unit includes：External battery, internal battery, control circuit, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor being arranged on pcb board, wherein, external battery plug-in is installed on pcb board；The drain electrode of first metal-oxide-semiconductor, the grid of the second metal-oxide-semiconductor and control circuit are connected with external battery；The drain electrode of second metal-oxide-semiconductor is connected with internal battery；The source electrode of the source electrode of first metal-oxide-semiconductor and the second metal-oxide-semiconductor is used to connect the load of mobile terminal；Grid of the control circuit also with the first metal-oxide-semiconductor is connected, and for exporting low level signal to the grid of the first metal-oxide-semiconductor when receiving the voltage more than predetermined threshold value, and when detecting that external battery is pulled out, high level signal is exported to the grid of the first metal-oxide-semiconductor.The supply unit still can ensure mobile terminal normal work when bearing power increases suddenly, and applicability is more preferable.
Description
Technical field
The present invention relates to the power technique fields of mobile terminal, more particularly to a kind of supply unit for mobile terminal and
Mobile terminal.
Background technology
, will in some specific application scenarios in the application of existing mobile terminal with the development of mobile terminal technology
Reliable power supply capacity can be provided for mobile terminal by seeking the supply unit of mobile terminal, even in for mobile terminal change battery
During, also require that mobile terminal keeps normal operating conditions, so, it is necessary to for mobile terminal, stand-by power supply is set, and
And during battery is changed, stand-by power supply power supply can be enabled.
In the prior art, in order to ensure during battery is changed, it is system power supply that can enable stand-by power supply, generally
Two batteries are set in the terminal, and each battery configures a controlling switch and a voltage detecting circuit, by real-time
The voltage change of the first battery and the second battery is detected, when it is zero to detect the first cell voltage, illustrates that the first battery may
It is pulled out, can enables the second battery by controlling two on or off switched and continue as mobile terminal power supply.But
Using existing mode, when running into system moment heavy load, i.e. the bearing power of system is undergone mutation, when increasing suddenly, the
The voltage transient falling of one battery, but can will be not necessarily zero, the second battery would not start in time, so, in the second battery
When also not actuated, the first battery will cause system instant cut-off due to electricity shortage, influence the normal use of mobile terminal.
So the existing supply unit for mobile terminal, when system load power increases suddenly, easily cause and be
System power-off, influence the normal use of mobile terminal.
The content of the invention
It is existing for moving to solve the invention provides a kind of supply unit and mobile terminal for mobile terminal
The supply unit of terminal, when system load power increases suddenly, system cut-off is easily caused, influenceing the normal of mobile terminal makes
The problem of using.
In a first aspect, the invention provides a kind of supply unit for mobile terminal, the supply unit includes：It is arranged in
External battery, internal battery, control circuit, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor on pcb board, wherein, the external battery is inserted
The formula of pulling out is installed on the pcb board；The draining of first metal-oxide-semiconductor, the grid of second metal-oxide-semiconductor and the control circuit are equal
It is connected with the external battery；The drain electrode of second metal-oxide-semiconductor is connected with the internal battery；First metal-oxide-semiconductor
The source electrode of source electrode and second metal-oxide-semiconductor is used to connect the load of mobile terminal；The control circuit also with the first MOS
The grid of pipe is connected, for exporting low electricity to the grid of first metal-oxide-semiconductor when receiving the voltage more than predetermined threshold value
Ordinary mail number, and when detecting that the external battery is pulled out, high level signal is exported to the grid of first metal-oxide-semiconductor.
Further, the control circuit includes：Comparator and control chip；The input of the comparator with it is described external
Battery is connected, and output end is connected with the grid of first metal-oxide-semiconductor；The external battery and the comparator with it is described
Control chip is connected；The comparator is used for when receiving the voltage more than predetermined threshold value to the grid of first metal-oxide-semiconductor
Pole exports low level signal；The control chip is used for when detecting that the external battery is pulled out, and controls the comparator
High level signal is exported to the grid of first metal-oxide-semiconductor.
Further, the control circuit includes：Comparator, triode, control chip and resistance；The input of the comparator
End and the control chip are connected with the external battery；The base stage of the triode and the output end phase of the comparator
Connection, colelctor electrode are connected with the grid of first metal-oxide-semiconductor, grounded emitter；The colelctor electrode of the triode and described
The source electrode of one metal-oxide-semiconductor is connected by the resistance；The comparator be used for when receiving the voltage more than predetermined threshold value to
The triode exports high level signal；The control chip is connected with the comparator, for detect it is described external
When battery is pulled out, the comparator output low level signal is controlled.
Further, the supply unit also includes：Charging chip；The charging chip is series at the external battery and described
Between the drain electrode of first metal-oxide-semiconductor；The charging chip is connected with the control circuit.
Further, the supply unit also includes：Charging circuit；The input of the charging circuit and the external battery phase
Connection, output end are connected with the internal battery；The charging circuit is connected with the control circuit.
Further, detection pin is provided with the external battery；The control circuit passes through the detection pin and institute
State external battery to be connected, for detecting whether the external battery is pulled out.
Second aspect, present invention also offers a kind of mobile terminal, the mobile terminal includes above-mentioned supply unit.
The technical scheme that embodiments of the invention provide can include the following benefits：The invention provides one kind to be used for
The supply unit and mobile terminal of mobile terminal.The supply unit by pluggable external battery, internal battery, control circuit,
First metal-oxide-semiconductor and the second metal-oxide-semiconductor connect and compose according to specific connected mode, when external battery and internal battery assign into
When on pcb board, low level signal is exported to the grid of the first metal-oxide-semiconductor by control circuit, turns on the first metal-oxide-semiconductor, connection is external
The connection of the load of battery and mobile terminal, meanwhile, pass through the connection of external battery and the grid of the second metal-oxide-semiconductor, shut-off second
Metal-oxide-semiconductor, the connection between internal battery and the load of mobile terminal is cut off, external battery is used as system power supply, when external electricity
When pond is pulled out, high level signal is exported to the grid of the first metal-oxide-semiconductor by control circuit, turns off the first metal-oxide-semiconductor, cut-out is external
The connection of the load of battery and mobile terminal, meanwhile, pass through the connection of external battery and the grid of the second metal-oxide-semiconductor, conducting second
Metal-oxide-semiconductor, the connection between internal battery and the load of mobile terminal is connected, so as to successfully be cut from external battery for system power supply
It is system power supply to shift to internal battery, ensures the normal work of system.It follows that the peace by external battery on pcb board
Dress state, can successfully control the break-make of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, so as to control external battery and internal battery with
The connected state of the load of mobile terminal, without increasing other control units or control program, the circuit of whole supply unit is set
Count it is simpler, the course of work of supply unit also it is simpler efficiently, applicability is more preferable；Also, made using the supply unit
For mobile terminal power supply when, when the bearing power of mobile terminal system increases suddenly, internal battery can pass through in time
The connection of the parasitic diode conducting and the load of mobile terminal of two metal-oxide-semiconductors, it is the load of mobile terminal together with external battery
Power supply, avoid that system cut-off occurs, ensure that the normal use of mobile terminal.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structured flowchart of supply unit for mobile terminal provided in an embodiment of the present invention；
Fig. 2 is the structured flowchart of another supply unit for being used for mobile terminal provided in an embodiment of the present invention；
Fig. 3 is the structured flowchart of another supply unit for being used for mobile terminal provided in an embodiment of the present invention；
Fig. 4 is the structured flowchart of another supply unit for being used for mobile terminal provided in an embodiment of the present invention；
Fig. 5 is the structured flowchart of another supply unit for being used for mobile terminal provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the supply unit and mobile terminal provided by the present invention for mobile terminal is discussed in detail.
Referring to Fig. 1, Fig. 1 is illustrated that a kind of structure of supply unit for mobile terminal provided in an embodiment of the present invention
Block diagram.Understand that the supply unit includes with reference to Fig. 1：It is arranged in PCB (Printed Circuit Board, printed circuit board) plate
External battery 1, internal battery 2 in (not shown), control circuit 3, the first MOS (Metal-Oxide-
Semiconductor, metal-oxide semiconductor fieldeffect transistor) 4 and second metal-oxide-semiconductor 5 of pipe, wherein, the external electricity
The plug-in of pond 1 is installed on the pcb board；The drain electrode d1 of first metal-oxide-semiconductor 4, the grid g2 of second metal-oxide-semiconductor 5 and institute
Control circuit 3 is stated with the external battery 1 to be connected, wherein, the grid g2 and the external battery 1 of second metal-oxide-semiconductor 5
It is grounded after being connected by resistance 6, avoids the external battery 1 that short circuit occurs；The drain electrode d2 of second metal-oxide-semiconductor 5 with it is described
Internal battery 2 is connected；The source electrode s2 of the source electrode s1 of first metal-oxide-semiconductor 4 and second metal-oxide-semiconductor 5 is used to connection movement
The load 100 of terminal；Grid g1 of the control circuit 3 also with first metal-oxide-semiconductor 4 is connected, for being more than receiving
Low level signal is exported to the grid g1 of first metal-oxide-semiconductor 4 during the voltage of predetermined threshold value, and is detecting the external electricity
When pond 1 is pulled out, high level signal is exported to the grid g1 of first metal-oxide-semiconductor 4, wherein, predetermined threshold value is usually arranged as 3V.
In some other optional embodiment, referring to Fig. 2, Fig. 2 is illustrated that another kind provided in an embodiment of the present invention
Structured flowchart for the supply unit of mobile terminal.Understood with reference to Fig. 2, detection pin 7, control are provided with external battery 1
Circuit 3 is connected by the detection pin 7 with external battery 1, and control circuit 3 can be with the real-time reception detection pin 7 output
Detected value, judges whether the external battery 1 is assigned on pcb board, and based on this, control circuit 3 can be used for described in detection
Whether external battery 1 is extracted from pcb board.If the detected value that control circuit 3 receives the detection pin 7 output is default
First detected value (such as default first detected value is 1), it may be determined that external battery 1 is assigned on pcb board；If control circuit
3 detected values for receiving the detection pin 7 output are default second detected value (such as default second detected value is 0), can be true
Determine external battery 1 not assign on pcb board；If control circuit 3 receives the detected value of the detection pin 7 output by presetting
First detected value is changed into default second detected value, it may be determined that external battery 1 is extracted from pcb board；If control circuit 3 connects
The detected value for receiving the detection pin 7 output is changed into default first detected value from default second detected value, it may be determined that external electricity
Pond 1 is inserted on pcb board.
Further, the supply unit also includes：The detection circuit 8 being arranged on pcb board, the detection circuit 8 are series at inspection
Survey between pin 7 and control circuit 3, for obtaining detected value from the detection pin 7 in real time, and detected value is inputted to control
In circuit 3.Detected value more fast and easy can be obtained than control circuit 3 in the form of software using detection circuit 8, be applicable
Property is more preferable.
During specific works, the real-time reception detected value of control circuit 3, when control circuit 3 detects that external battery 1 is placed in
On pcb board, i.e., when external battery 1 and internal battery 2 are installed on pcb board, because control circuit 3 receives external battery 1
The voltage of output is higher than predetermined threshold value, and control circuit 3 exports low level signal to the grid g1 of the first metal-oxide-semiconductor 4 so that first
The source electrode piezoelectricity Vs1 and grid voltage Vg1 of metal-oxide-semiconductor 4 difference are more than default first voltage value q (the i.e. source electrodes of the first metal-oxide-semiconductor 4
Piezoelectricity Vs1- grid voltages Vg1>Q, q>0), the first metal-oxide-semiconductor 4 turns on, meanwhile, the grid voltage Vg2 and source electrode of the second metal-oxide-semiconductor 5
Voltage Vs2 difference is more than default second voltage value p (the i.e. grid voltage Vg2- source voltages Vs2 of the second metal-oxide-semiconductor>P, p>0),
Second metal-oxide-semiconductor 5 turns off, so that external battery 1 connects with the load 100 of mobile terminal, internal battery 2 and mobile terminal
The connection of load 100 is disconnected, and external battery 1 is powered for the load 100 of mobile terminal.
After external battery 1 is extracted from pcb board, the voltage at the end of external battery 1 will not be reduced to zero immediately, the first MOS
Pipe 4 is remained on so that the load 100 of mobile terminal, the first metal-oxide-semiconductor 4, the grid circuit of the second metal-oxide-semiconductor 5 are formed back
Road, the second metal-oxide-semiconductor 5 is caused not open completely, internal battery 2 can not power for the load 100 of mobile terminal in time, cause whole
Individual system cut-off.In order to avoid foregoing problems occur, when control circuit 3 detects that external battery 1 is extracted from pcb board, to
The grid g1 output high level signals of first metal-oxide-semiconductor 4 so that the grid voltage Vg1 of the first metal-oxide-semiconductor 4 and source voltage Vs1 phases
Deng, the first metal-oxide-semiconductor 4 turns off, meanwhile, the source voltage Vs2 and grid voltage Vg2 of the second metal-oxide-semiconductor 5 difference are more than the default 3rd
Magnitude of voltage m (the i.e. source voltage Vs2- grid voltages Vg2 of the second metal-oxide-semiconductor 5>M, m>0), the second metal-oxide-semiconductor 5 turns on, so that
External battery 1 and the connection of the load 100 of mobile terminal disconnect, and internal battery 2 connects with the load 100 of mobile terminal, built-in
Battery 2 is powered for the load 100 of mobile terminal.After external battery 1 is extracted from pcb board, before being not inserted on pcb board,
The load 100 that internal battery 2 is continuously mobile terminal is powered.
After control circuit 3 detects that external battery 1 is inserted on pcb board, the output voltage rise of external battery 1,
When the output voltage of external battery 1 is higher than predetermined threshold value, the operation principle of supply unit is analogous to external battery 1 and in-built electrical
Pond 2 is installed in the situation on pcb board, is no longer described in detail herein, in such cases, external battery 1 and the load 100 of mobile terminal
Connection, internal battery 2 and the connection of the load 100 of mobile terminal are disconnected, and external battery 1 is powered for the load 100 of mobile terminal.
In addition, when external battery 1 and internal battery 2 are installed on pcb board, external battery 1 is the load of mobile terminal
In the case of 100 power supplies, if the bearing power increase of mobile terminal, the output current of external battery 1 can also increase, cause outer
Putting the output voltage of battery 1 reduces, and the voltage at the end of load 100 of mobile terminal also reduces, now, the voltage of internal battery 2 and
The difference of the voltage at the end of load 100 of mobile terminal will be more than the conducting voltage of the parasitic diode of the second metal-oxide-semiconductor 5, cause
The parasitic diode conducting of second metal-oxide-semiconductor 5 so that the parasitic diode that internal battery 2 passes through the second metal-oxide-semiconductor 5 is mobile terminal
The supplementary power of load 100, prevent from, due to the increase of the bearing power of mobile terminal, causing the voltage of supply unit to decline and draw
Play whole system power-off.
In some other optional embodiment, the setting of control circuit 3 may be referred to Fig. 3, and Fig. 3 is illustrated that the present invention
The another kind that embodiment provides is used for the structured flowchart of the supply unit of mobile terminal.Understand that control circuit includes with reference to Fig. 3：
Comparator 9 and control chip 10；The input of the comparator 9 is connected with the external battery 1, output end and described first
The grid g1 of metal-oxide-semiconductor 4 is connected；The external battery 1 and the comparator 9 are connected with the control chip 10, wherein,
The external battery 1 is connected with the control chip 10 by the output pin 7 set in external battery 1；The comparator 9
For exporting low level signal to the grid g1 of first metal-oxide-semiconductor 4 when receiving the voltage more than predetermined threshold value；The control
Coremaking piece 10 is used for when detecting that the external battery 1 is pulled out, and controls the comparator 9 to the grid of first metal-oxide-semiconductor 4
Pole g1 exports high level signal.Compared with control circuit realizes corresponding function using software, control circuit is arranged to by comparing
The structure that device 9 and control chip 10 are formed, faster, result is more reliable and more stable for processing speed, and applicability is more preferable.
, can also Series detectors circuit between external battery 1 and control chip 10 in some other optional embodiment
8, specific setting and effect may be referred to previous embodiment content, no longer be described in detail herein.
During specific works, when external battery 1 is placed on pcb board, i.e. external battery 1 and internal battery 2 is installed in
When on pcb board, the voltage that the output of external battery 1 is received due to comparator 9 is higher than predetermined threshold value, and comparator 9 is to the first metal-oxide-semiconductor
4 grid g1 output low level signals so that the source electrode piezoelectricity Vs1 and grid voltage Vg1 of the first metal-oxide-semiconductor 4 difference are more than pre-
If first voltage value q (the i.e. source electrode piezoelectricity Vs1- grid voltages Vg1 of the first metal-oxide-semiconductor 4>Q, q>0), the first metal-oxide-semiconductor 4 turns on, together
When, the grid voltage Vg2 and source voltage Vs2 of the second metal-oxide-semiconductor 5 difference are more than default second voltage value p (i.e. the second metal-oxide-semiconductors
Grid voltage Vg2- source voltages Vs2>P, p>0), the second metal-oxide-semiconductor 5 turns off, so that external battery 1 and mobile terminal
The connection of load 100, internal battery 2 and the connection of the load 100 of mobile terminal disconnect, and external battery 1 is the load of mobile terminal
100 power supplies.
The real-time reception detected value of control chip 10, when control chip 10 detects that external battery 1 is extracted from pcb board
Afterwards, the voltage at the end of external battery 1 will not be reduced to zero immediately, and the first metal-oxide-semiconductor 4 remains on so that mobile terminal is born
The grid circuit formation loop of the 100, first metal-oxide-semiconductor 4, the second metal-oxide-semiconductor 5 is carried, causes the second metal-oxide-semiconductor 5 not open completely, it is built-in
Battery 2 can not power for the load 100 of mobile terminal in time, cause whole system to power off.In order to avoid foregoing problems, control occurs
When coremaking piece 10 detects that external battery 1 is extracted from pcb board, control comparator 9 exports to the grid g1 of the first metal-oxide-semiconductor 4
High level signal so that the grid voltage Vg1 of the first metal-oxide-semiconductor 4 is equal with source voltage Vs1, and the first metal-oxide-semiconductor 4 turns off, meanwhile,
The source voltage Vs2 and grid voltage Vg2 of second metal-oxide-semiconductor 5 difference be more than default third voltage value m (i.e. the second metal-oxide-semiconductor 5
Source voltage Vs2- grid voltages Vg2>M, m>0), the second metal-oxide-semiconductor 5 turns on, so that external battery 1 and mobile terminal is negative
100 connection disconnection is carried, internal battery 2 connects with the load 100 of mobile terminal, and internal battery 2 is the load 100 of mobile terminal
Power supply.After external battery 1 is extracted from pcb board, before being not inserted on pcb board, internal battery 2 is continuously mobile terminal
The power supply of load 100.
After external battery 1 is inserted on pcb board, the rise of the output voltage of external battery 1 is defeated when external battery 1
When going out voltage and being higher than predetermined threshold value, the operation principle of supply unit is analogous to external battery 1 and internal battery 2 is installed in PCB
Situation on plate, is no longer described in detail herein, and in such cases, external battery 1 connects with the load 100 of mobile terminal, internal battery 2
Connection with the load 100 of mobile terminal is disconnected, and external battery 1 is powered for the load 100 of mobile terminal.
In addition, when external battery 1 and internal battery 2 are installed on pcb board, external battery 1 is the load of mobile terminal
In the case of 100 power supplies, if the bearing power increase of mobile terminal, the output current of external battery 1 can also increase, cause outer
Putting the output voltage of battery 1 reduces, and the voltage at the end of load 100 of mobile terminal also reduces, now, the voltage of internal battery 2 and
The difference of the voltage at the end of load 100 of mobile terminal will be more than the conducting voltage of the parasitic diode of the second metal-oxide-semiconductor 5, cause
The parasitic diode conducting of second metal-oxide-semiconductor 5 so that the parasitic diode that internal battery 2 passes through the second metal-oxide-semiconductor 5 is mobile terminal
The supplementary power of load 100, prevent from, due to the increase of the bearing power of mobile terminal, causing the voltage of supply unit to decline and draw
Play whole system power-off.
In some other optional embodiment, the setting of control circuit 3 may be referred to Fig. 4, and Fig. 4 is illustrated that the present invention
The another kind that embodiment provides is used for the structured flowchart of the supply unit of mobile terminal.Understand that control circuit includes with reference to Fig. 4：
Comparator 11, triode 12, control chip 13 and resistance 14；The input and the control chip 13 of the comparator 11 with
The external battery 1 is connected, wherein, the control chip 13 and the external battery 1 are by being arranged at the external battery 1
On detection pin 7 be connected；The base stage b of the triode 12 is connected with the output end of the comparator 11, colelctor electrode c with
The grid g1 of first metal-oxide-semiconductor 4 is connected, emitter e ground connection；The colelctor electrode c of the triode 12 and first metal-oxide-semiconductor
4 source electrode s1 is connected by the resistance 14；The comparator 11 be used for when receiving the voltage more than predetermined threshold value to
The triode 12 exports high level signal；The control chip 13 is connected with the comparator 11, for detecting
When stating external battery 1 and being pulled out, the comparator 11 is controlled to export low level signal.Equally, it is real using software with control circuit
Existing corresponding function is compared, the knot that control circuit is arranged to be made up of comparator 11, triode 12, control chip 13 and resistance 14
Structure, faster, result is more reliable and more stable for processing speed, and applicability is more preferable.
, can also Series detectors circuit between external battery 1 and control chip 13 in some other optional embodiment
8, specific setting and effect may be referred to previous embodiment content, no longer be described in detail herein.
During specific works, when external battery 1 is placed on pcb board, i.e. external battery 1 and internal battery 2 is installed in
When on pcb board, the voltage that the output of external battery 1 is received due to comparator 11 is higher than predetermined threshold value, and comparator 11 is to triode
12 base stage b output high level signals, triode 12 turn on, and the colelctor electrode c of triode 12 is changed into low level, the first metal-oxide-semiconductor 4
Grid g1 is also low level so that the source electrode piezoelectricity Vs1 and grid voltage Vg1 of the first metal-oxide-semiconductor 4 difference are more than default first electricity
Pressure value q (the i.e. source electrode piezoelectricity Vs1- grid voltages Vg1 of the first metal-oxide-semiconductor 4>Q, q>0), the first metal-oxide-semiconductor 4 turns on, meanwhile, second
The grid voltage Vg2 and source voltage Vs2 of metal-oxide-semiconductor 5 difference are more than default second voltage value p (the i.e. grid electricity of the second metal-oxide-semiconductor
Press Vg2- source voltages Vs2>P, p>0), the second metal-oxide-semiconductor 5 turns off, so that external battery 1 and the load 100 of mobile terminal
Connection, internal battery 2 and the connection of the load 100 of mobile terminal are disconnected, and external battery 1 is powered for the load 100 of mobile terminal.
The real-time reception detected value of control chip 13, when control chip 13 detects that external battery 1 is extracted from pcb board
Afterwards, the voltage at the end of external battery 1 will not be reduced to zero immediately, and the first metal-oxide-semiconductor 4 remains on so that mobile terminal is born
The grid circuit formation loop of the 100, first metal-oxide-semiconductor 4, the second metal-oxide-semiconductor 5 is carried, causes the second metal-oxide-semiconductor 5 not open completely, it is built-in
Battery 2 can not power for the load 100 of mobile terminal in time, cause whole system to power off.In order to avoid foregoing problems, control occurs
When coremaking piece 13 detects that external battery 1 is extracted from pcb board, base stage b output of the control comparator 11 to triode 12 is low
Level signal, triode 12 turn off, and the colelctor electrode c of triode 12 is changed into high level, and the grid g1 of the first metal-oxide-semiconductor 4 is also high electricity
It is flat so that the grid voltage Vg1 of the first metal-oxide-semiconductor 4 is equal with source voltage Vs1, and the first metal-oxide-semiconductor 4 turns off, meanwhile, the second metal-oxide-semiconductor
5 source voltage Vs2 and grid voltage Vg2 difference are more than default third voltage value m (the i.e. source voltages of the second metal-oxide-semiconductor 5
Vs2- grid voltages Vg2>M, m>0), the second metal-oxide-semiconductor 5 turns on, so that external battery 1 and the load 100 of mobile terminal
Connection is disconnected, and internal battery 2 connects with the load 100 of mobile terminal, and internal battery 2 is powered for the load 100 of mobile terminal.Outside
Put after battery 1 extracted from pcb board, before being not inserted on pcb board, internal battery 2 is continuously the load 100 of mobile terminal
Power supply.
After external battery 1 is inserted on pcb board, the rise of the output voltage of external battery 1 is defeated when external battery 1
When going out voltage and being higher than predetermined threshold value, the operation principle of supply unit is analogous to external battery 1 and internal battery 2 is installed in PCB
Situation on plate, is no longer described in detail herein, and in such cases, external battery 1 connects with the load 100 of mobile terminal, internal battery 2
Connection with the load 100 of mobile terminal is disconnected, and external battery 1 is powered for the load 100 of mobile terminal.
In addition, when external battery 1 and internal battery 2 are installed on pcb board, external battery 1 is the load of mobile terminal
In the case of 100 power supplies, if the bearing power increase of mobile terminal, the output current of external battery 1 can also increase, cause outer
Putting the output voltage of battery 1 reduces, and the voltage at the end of load 100 of mobile terminal also reduces, now, the voltage of internal battery 2 and
The difference of the voltage at the end of load 100 of mobile terminal will be more than the conducting voltage of the parasitic diode of the second metal-oxide-semiconductor 5, cause
The parasitic diode conducting of second metal-oxide-semiconductor 5 so that the parasitic diode that internal battery 2 passes through the second metal-oxide-semiconductor 5 is mobile terminal
The supplementary power of load 100, prevent from, due to the increase of the bearing power of mobile terminal, causing the voltage of supply unit to decline and draw
Play whole system power-off.
In some other optional embodiment, referring to Fig. 5, Fig. 5 is illustrated that another kind provided in an embodiment of the present invention
Structured flowchart for the supply unit of mobile terminal.Understand that the supply unit also includes with reference to Fig. 5：Charging chip 15；It is described
Charging chip 15 is series between the drain electrode d1 of the external battery 1 and first metal-oxide-semiconductor 4；The charging chip 15 and institute
Control circuit is stated to be connected, wherein, when control circuit includes control chip (such as control chip 13), the charging chip 15
It is connected with control chip (such as control chip 13).
Control circuit (control chip) can detect the electricity of external battery 1 in real time, when detecting that external battery 1 assigns into
On pcb board, and its electricity is in discontented state, and during the 15 externally connected charging equipment of charging chip, such as
Computer terminal etc., control circuit (control core are connected to by the externally connected power supply adaptor of USB interface or by USB interface
Piece) the control charging chip 15 connects with external power adapter or computer terminal, and it is that external battery 1 charges, so as to ensure
The normal work of external battery 1.
Control circuit (control chip) detects that external battery 1 is extracted from pcb board, or the charging chip 15 and outside
The connection of charging equipment disconnects, or the electricity of external battery 1 for it is full electric when, control the charging chip 15 to disconnect and external electrical
Source adapter or the connection of computer terminal, stop charging for the external battery 1.
Further, the supply unit also includes：Charging circuit 16；The input of the charging circuit 16 and the external electricity
Pond 1 is connected, and output end is connected with the internal battery 2；The charging circuit 16 is connected with the control circuit, its
In, when control circuit includes control chip (such as control chip 13), the charging circuit 16 and control chip (such as control
Chip 13) it is connected.
Control circuit (control chip) can detect the voltage of internal battery 2 in real time, when the voltage for detecting internal battery 2
Less than preset minimum voltage (such as preset minimum voltage is 4V), and when external battery 1 is assigned on pcb board, control circuit
(control chip) controls the charging circuit 16 to turn on the external battery 1 and the internal battery 2, using the external battery
1 is that internal battery 2 charges.
Control circuit (control chip) detects that the voltage of internal battery 2 is more than predetermined maximum voltage (such as default maximum
Voltage is 4.05V), or when external battery 1 is extracted from pcb board, control charging circuit 16 disconnects external battery 1 and internal battery
Connection between 2, stop charging for internal battery 2.
Supply unit provided in an embodiment of the present invention for mobile terminal, by pluggable external battery, internal battery,
Control circuit, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor connect and compose according to specific connected mode, when external battery and internal battery
When assigning on pcb board, low level signal is exported to the grid of the first metal-oxide-semiconductor by control circuit, turns on the first metal-oxide-semiconductor,
The connection of the load of external battery and mobile terminal is connected, meanwhile, by the connection of external battery and the grid of the second metal-oxide-semiconductor,
The second metal-oxide-semiconductor is turned off, the connection between internal battery and the load of mobile terminal is cut off, uses external battery as system power supply,
When external battery is pulled out, high level signal is exported to the grid of the first metal-oxide-semiconductor by control circuit, turns off the first metal-oxide-semiconductor,
The connection of the load of external battery and mobile terminal is cut off, meanwhile, by the connection of external battery and the grid of the second metal-oxide-semiconductor,
The second metal-oxide-semiconductor is turned on, connects the connection between internal battery and the load of mobile terminal, so as to be successfully to be from external battery
Power switching to internal battery of uniting is system power supply, ensures the normal work of system.It follows that by external battery in PCB
Installment state on plate, the break-make of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor can be successfully controlled, so as to control external battery and interior
The connected state of the load of battery and mobile terminal is put, without increasing other control units or control program, whole supply unit
Circuit design it is simpler, the course of work of supply unit also it is simpler efficiently, applicability is more preferable；Also, use the electricity
During power supply of the source device as mobile terminal, when the bearing power of mobile terminal system increases suddenly, internal battery can and
When by the connection of the conducting of the parasitic diode of the second metal-oxide-semiconductor and the load of mobile terminal, together with external battery for it is mobile eventually
The load supplying at end, avoid that system cut-off occurs, ensure that the normal use of mobile terminal；In addition, in the supply unit
External battery is used to be charged for internal battery, without setting special use external power adapter to carry out for internal battery
The charging circuit of charging, charging are more convenient.
The embodiment of the present invention additionally provides a kind of mobile terminal, and the mobile terminal includes above-mentioned supply unit.
Mobile terminal provided in an embodiment of the present invention, in the case where external battery is pulled out, it is also ensured that normal work
Make, and in the bearing power moment increase of system, will not also power off, applicability is more preferable.
Embodiment in this specification is described by the way of progressive, and identical similar part is mutual between each embodiment
Referring to.It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between any this actual relation or order be present.Moreover, such as " comprising ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of elements not only include those
Key element, but also the other element including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element in the process including key element, method, article or equipment also be present.
It the above is only the embodiment of the present invention, it is noted that come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (7)
- A kind of 1. supply unit for mobile terminal, it is characterised in that including：External battery, internal battery, control circuit, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor being arranged on pcb board, wherein, it is described External battery plug-in is installed on the pcb board；The draining of first metal-oxide-semiconductor, the grid of second metal-oxide-semiconductor and the control circuit are connected with the external battery Connect；The drain electrode of second metal-oxide-semiconductor is connected with the internal battery；The source electrode of the source electrode of first metal-oxide-semiconductor and second metal-oxide-semiconductor is used to connect the load of mobile terminal；Grid of the control circuit also with first metal-oxide-semiconductor is connected, for receiving the voltage more than predetermined threshold value When to the grid of first metal-oxide-semiconductor export low level signal, and when detecting that the external battery is pulled out, to described The grid output high level signal of first metal-oxide-semiconductor.
- 2. supply unit as claimed in claim 1, it is characterised in that the control circuit includes：Comparator and control chip； The input of the comparator is connected with the external battery, and output end is connected with the grid of first metal-oxide-semiconductor；It is described External battery and the comparator are connected with the control chip；The comparator is used to be more than predetermined threshold value receiving Voltage when to first metal-oxide-semiconductor grid export low level signal；The control chip be used for detect it is described external When battery is pulled out, the comparator is controlled to export high level signal to the grid of first metal-oxide-semiconductor.
- 3. supply unit as claimed in claim 1, it is characterised in that the control circuit includes：Comparator, triode, control Coremaking piece and resistance；The input of the comparator and the control chip are connected with the external battery；Three pole The base stage of pipe is connected with the output end of the comparator, and colelctor electrode is connected with the grid of first metal-oxide-semiconductor, and emitter stage connects Ground；The colelctor electrode of the triode is connected with the source electrode of first metal-oxide-semiconductor by the resistance；The comparator is used for When receiving the voltage more than predetermined threshold value high level signal is exported to the triode；The control chip and the comparator It is connected, for when detecting that the external battery is pulled out, controlling the comparator output low level signal.
- 4. supply unit as claimed in claim 1, it is characterised in that the supply unit also includes：Charging chip；The charging Chip-in series are between the drain electrode of the external battery and first metal-oxide-semiconductor；The charging chip and the control circuit phase Connection.
- 5. supply unit as claimed in claim 1, it is characterised in that the supply unit also includes：Charging circuit；The charging The input of circuit is connected with the external battery, and output end is connected with the internal battery；The charging circuit and institute Control circuit is stated to be connected.
- 6. supply unit as claimed in claim 1, it is characterised in that detection pin is provided with the external battery；It is described Control circuit is connected by the detection pin with the external battery, for detecting whether the external battery is pulled out.
- 7. a kind of mobile terminal, it is characterised in that the mobile terminal includes the power supply dress described in claim 1 to 6 any one Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711011322.6A CN107579588A (en) | 2017-10-26 | 2017-10-26 | A kind of supply unit and mobile terminal for mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711011322.6A CN107579588A (en) | 2017-10-26 | 2017-10-26 | A kind of supply unit and mobile terminal for mobile terminal |
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| CN107579588A true CN107579588A (en) | 2018-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711011322.6A Pending CN107579588A (en) | 2017-10-26 | 2017-10-26 | A kind of supply unit and mobile terminal for mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011313A1 (en) * | 2021-08-06 | 2023-02-09 | 南京泉峰科技有限公司 | Power supply device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203617785U (en) * | 2013-12-30 | 2014-05-28 | 广东瑞德智能科技股份有限公司 | Power supply automatic switching circuit |
| CN104467169A (en) * | 2014-12-26 | 2015-03-25 | 深圳警翼数码科技有限公司 | Uninterruptible power supply device |
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2017
- 2017-10-26 CN CN201711011322.6A patent/CN107579588A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203617785U (en) * | 2013-12-30 | 2014-05-28 | 广东瑞德智能科技股份有限公司 | Power supply automatic switching circuit |
| CN104467169A (en) * | 2014-12-26 | 2015-03-25 | 深圳警翼数码科技有限公司 | Uninterruptible power supply device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011313A1 (en) * | 2021-08-06 | 2023-02-09 | 南京泉峰科技有限公司 | Power supply device and control method thereof |
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