CN107979121A - Charging circuit and its power-switching circuit - Google Patents
Charging circuit and its power-switching circuit Download PDFInfo
- Publication number
- CN107979121A CN107979121A CN201710256513.2A CN201710256513A CN107979121A CN 107979121 A CN107979121 A CN 107979121A CN 201710256513 A CN201710256513 A CN 201710256513A CN 107979121 A CN107979121 A CN 107979121A
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- Prior art keywords
- switch
- power supply
- current
- charge
- prime
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of charging circuit, charges a battery to provide a charge power supply, includes a power supply transmitting element and a power-switching circuit.The power-switching circuit includes, and is coupled with an inductor, it includes an at least change-over switch, and prime switch produces intermediary's power supply to turn on the DC power supply, and a direct charge switch.Wherein under suitching type charge mode, change-over switch, which is changed the dielectric and come from, produces the charge power supply in a charge node；Under plug-in pattern, which adjusts the DC current, and prime switch is with the plug-in switch conduction DC current and in producing the charging current in the charge node.The body diode and the body diode of the change-over switch of prime switch reversely couple, and the body diode that the body diode of prime switch is switched with the plug-in reversely couples, to block a parasitic body electric current.In addition, the present invention also proposes the power-switching circuit for charging circuit.
Description
Technical field
The present invention relates to a kind of charging circuit, particularly relates to a kind of integration plug-in pattern and suitching type charge mode
Capacitive battery power-switching circuit.The present invention also relates to the power-switching circuit for charging circuit.
Background technology
Fig. 1 discloses a kind of charging circuit of the prior art (charging circuit 1), it includes a suitching type conversion circuit 60,
Under charge mode, the power supply that power supply adaptor 11 can be provided (the such as, but not limited to 5V or 9V of USB PD or 12V
VBUS charging current ICHG) is converted to, and is charged to battery 50.
The shortcomings that prior art shown in Fig. 1 is, due to (power supply adaptor 11 and being cut using the conversion of two level power supplies
Change formula conversion circuit 60), thus power supply conversion efficiency can be relatively low, in addition, in the application of the small size such as intelligent mobile phone,
Especially (3A is greater than under relatively large constant charge current ICHG demands), the operation temperature of suitching type charging circuit 60
May be too high, therefore be only capable of charging with less constant charge current ICHG (being, for example, less than 3A), thus can not be effective
Shorten the charging interval.
Fig. 2 discloses the charging circuit (charging circuit 2) of another prior art, it is similar with charging circuit 1, charging circuit
2 also include a load switch 40 (load switch), wherein in the charging stage for needing larger charging current, directly to fill
The pattern of electricity, makes to have the power supply adaptor 12 of plug-in ability can directly provide a constant DC current IDC via one
Cable 20 (such as USB cable) and load switch 40 carry out constant current (CC, constant current) to battery 50 and fill
Electricity, wherein DC current IDC are generally equal with charging current ICHG.Charging circuit 2 is under plug-in pattern, due to only
The power supply conversion (power supply adaptor 12) of single-stage, thus its power supply conversion efficiency is higher, and in the small ruler such as intelligent mobile phone
It in very little application, can be charged, thus can be effectively contracted to battery with relatively large constant charge current (being greater than 3A)
Short charging time, and will not still cause the operation temperature of the running gears such as intelligent mobile phone excessive.And in other charging stages,
Then provided by 60 conversion electric power adapter 12 of suitching type charging circuit power supply (such as, but not limited to USB PD 5V or 9V or
The VBUS of 12V) and to battery 50 into line precharge or constant-potential charge etc..
But the shortcomings that prior art shown in Fig. 2, is, it is however generally that, suitching type charging circuit 60 and load switch
40 be respectively respectively independent integrated circuit (integrated circuit), therefore the control of charging circuit 2 is complex, and into
This is higher.
The prior art of the present invention compared to Fig. 1, the advantage is that while have plug-in path and switched-mode power supply
Convert charging path, can be charged with relatively large electric current, therefore can significantly institute's short charging time, and will not cause intelligence
The operation temperature of the running gears such as type mobile phone is excessive.And for the prior art of the present invention compared to Fig. 2, it will can cut as the aforementioned
Change formula charging circuit to be integrated in an integrated circuit (or an integrated antenna package) with load switch, there is easily controllable, diminution
Size and the advantages that reduce cost.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, proposes a kind of charging circuit and its power supply conversion
Circuit, can at the same time be had and plug in path and switched-mode power supply convert charging path, can carried out with relatively large electric current
Charging, therefore can significantly institute's short charging time, and the operation temperature of the running gears such as intelligent mobile phone will not be caused excessive；Separately
Outside, also suitching type charging circuit as the aforementioned and load switch can be integrated in an integrated circuit (or an integrated antenna package)
In, reaching has the advantages that easily controllable, minification and reduces cost.
In order to achieve the above object, one of viewpoint is sayed, the present invention provides a kind of charging circuit, to an input is electric
Source is converted to a charge power supply and charges to a battery, and wherein the charge power supply includes a charging voltage and a charging current；
The charging circuit includes：One power supply transmitting element, the input power is converted to a DC power supply, the wherein DC power supply
Including a DC voltage and a DC current；One power-switching circuit, including：One conversion switch circuit, with an inductor coupling
Connect, including an at least change-over switch；One prime switchs, and is coupled between the DC power supply and an intermediary node, to turn on this
DC power supply and in producing intermediary's power supply in the intermediary node, wherein intermediary's power supply includes a medium voltage and an intermediary
Electric current；One direct charge switch, is coupled between the intermediary node and a charge node；And a control circuit, to produce one
Prime switch control signal, direct charge switch control signal and a change-over switch control signal, being respectively used to control should
Prime switch, plug-in switch and the change-over switch；Wherein under a suitching type charge mode, control circuit control
The prime switch conduction, plug-in switch are not turned on and switch the change-over switch coming from the charging to change the dielectric
The charge power supply is produced on node；Wherein under a direct charge mode, which controls prime switch direct with this
Charge switch turns on, and makes the DC power supply in producing the charge power supply in the charge node.
In a preferred embodiment, the change-over switch, prime switch and plug-in switch respectively have one respectively
Body diode (body diode), the body diode and the reverse coupling of body diode of the change-over switch of prime switch
Connect, and the body diode that the body diode of prime switch is switched with the plug-in reversely couples, to block this turn
Change a parasitic body electric current (parasitic body current) of the body diode of switch or plug-in switch.
In a preferred embodiment, under the plug-in pattern, the power supply transmitting element is related according to a DC current
Signal and adjust the DC current in a default DC current level, and/or adjusted according to a DC voltage related signal
The DC voltage is in the DC voltage level of an acquiescence.
In a preferred embodiment, prime switch is used to sense the DC current and produce the related news of the DC current
Number.
In a preferred embodiment, which also includes a cable and/or a connector, is coupled to power supply transmission
Between unit and prime switch, wherein the cable and/or the connector meet universal serial bus specification or general serial is total
The cable and/or connector of line power supply specification (USB or USB PD), the cable and/or the connector include a power supply unit and one
Signal portion, the wherein power supply unit to couple the DC power supply, the signal portion to transmit the DC current related signal and/or
The DC voltage related signal and/or the charging current related signal and/or the charging voltage related signal.
In a preferred embodiment, prime switch and/or plug-in switch are more used for following protection operation extremely
It is one of few：(1) DC voltage too high voltages protection (2) DC current and/or the excessive current of intermediate current and/or charging current
Protect (3) DC power supply broken string (plug-out) protection.
In order to achieve the above object, another viewpoint is sayed, present invention provides a kind of power-switching circuit, for a charging
In circuit, which charges a battery an input power is converted to a charge power supply, wherein charging electricity
Source includes a charging voltage and a charging current；The charging circuit includes：One power supply transmitting element, to by the input power
A DC power supply is converted to, wherein the DC power supply includes a DC voltage and a DC current；The power-switching circuit bag
Contain：One conversion switch circuit, couples with an inductor, including an at least change-over switch；One prime switchs, and is coupled to the direct current
Between source and an intermediary node, to turn on the DC power supply and in producing intermediary's power supply in the intermediary node, wherein in this
Dielectric source includes a medium voltage and an intermediate current；One direct charge switch, is coupled to the intermediary node and is saved with a charging
Point between；And a control circuit, to produce a prime switch control signal, a direct charge switch control signal and one turn
Switch control signal is changed, is respectively used to control prime switch, plug-in switch and the change-over switch；Wherein in all
Change under formula charge mode, which controls the prime switch conduction, plug-in switch to be not turned on and switch the conversion
Switch is come from to change the dielectric and the charge power supply is produced in the charge node；Wherein under a direct charge mode, the control
Circuit processed controls prime switch and the plug-in switch conduction, makes the DC power supply in producing the charging in the charge node
Power supply.
In order to achieve the above object, another viewpoint is sayed, present invention provides a kind of power-switching circuit, for a charging
In circuit, which charges a battery an input power is converted to a charge power supply, wherein charging electricity
Source includes a charging voltage and a charging current；The charging circuit includes：One power supply transmitting element, to by the input power
A DC power supply is converted to, wherein the DC power supply includes a DC voltage and a DC current；And one plug in open
Close, be coupled between an intermediary node and a charge node；The power-switching circuit includes：One conversion switch circuit, with an inductance
Device couples, including an at least change-over switch；One prime switchs, and is coupled between the DC power supply and the intermediary node, to lead
Lead to the DC power supply in producing intermediary's power supply in the intermediary node, wherein intermediary's power supply includes a medium voltage and one
Intermediate current；And a control circuit, to produce a prime switch control signal, a direct charge switch control signal and
One change-over switch controls signal, is respectively used to control prime switch, plug-in switch and the change-over switch；Wherein in
Under one suitching type charge mode, which controls the prime switch conduction, plug-in switch to be not turned on and switch to be somebody's turn to do
Change-over switch is come from to change the dielectric and the charge power supply is produced in the charge node；Wherein under a direct charge mode,
The control circuit controls prime switch and the plug-in switch conduction, makes the DC power supply should in generation in the charge node
Charge power supply.
In a preferred embodiment, which is also integrated in an integrated circuit or encloses in an integrated circuit
In encapsulation.
Below by way of specific embodiment elaborate, when be easier to understand the purpose of the present invention, technology contents, feature and its
The effect of reached.
Brief description of the drawings
Fig. 1 shows a kind of schematic diagram of the charging circuit of the prior art；
Fig. 2 shows a kind of schematic diagram of the charging circuit of the prior art；
The schematic diagram of one embodiment of the charging circuit of Fig. 3 display present invention；
The schematic diagram of one embodiment of the charging circuit of Fig. 4 display present invention；
Fig. 5 shows corresponding diagram 3 or the analog waveform schematic diagram of Fig. 4.
Embodiment
Referring to Fig. 3, be a kind of schematic diagram of embodiment (charging circuit 3) of the charging circuit of the present invention shown in figure,
Charging circuit 3 charges a battery 50 an input power (not shown) is converted to a charge power supply, the wherein charging
Power supply includes an a charging voltage VCHG and charging current ICHG；Charging circuit 3 includes：One power supply transmitting element 10 and one
Power-switching circuit 30.
For power supply transmitting element 10 input power is converted to a DC power supply, wherein DC power supply includes a direct current
A voltage VDC and direct current stream ID C；The power supply transmitting element 10 may be, for example, a power supply adaptor, by form of communication
Input power is converted to foregoing DC power supply, or can be a direct current DC converting circuit, will come from such as Mobile electric power
The input power of (power bank) is converted to foregoing DC power supply；
Power-switching circuit 30 includes a conversion switch circuit 31, prime switch SP, a direct charge switch SD, and
One control circuit 32；31 and one inductor L of conversion switch circuit is coupled, including at least a change-over switch (is such as, but not limited to schemed
In change-over switch S1 and S2), wherein the change-over switch have a body diode (body diode, such as, but not limited to scheme
In change-over switch S1 and S2 body diode DB1 and DB2)；Prime switch SP is coupled to DC power supply and intermediary node MID
Between, to conducting direct current power supply in producing intermediary's power supply on intermediary node MID, wherein intermediary's power supply includes a dielectric
Press a VMID and intermediate current IMID, prime switch SP that there is a body diode (such as body diode DBP in figure)；
Plug in switch SD to be coupled between an intermediary node MID and a charge node CHG, there is a body diode (such as to scheme for it
In body diode DBD)；Wherein body diode (body diode) refers to for example in MOS transistor, matrix
(bulk) parasitic diode formed between source electrode (source) or drain (drain).
Control circuit 32 to produce a prime switch control signal VCP, a direct charge switch control signal VCD and
One change-over switch control signal VCS, be respectively used to control prime switch SP, plug in switch SD and change-over switch (S1 with
S2)。
Under a suitching type charge mode, control circuit 32 controls prime switch SP conductings, plugs in and open charging circuit 3
Close SD be not turned on and according to a charging voltage related signal and/or a charging current related signal and switch transition switch S1 with
S2 is come from to change dielectric and produces charge power supply on charge node CHG so that charging voltage VCHG adjusts filling in an acquiescence
Piezoelectric voltage level and/or cause charging current ICHG adjust in a default charging current level.
In addition, under a direct charge mode, power supply transmitting element 10 is adjusted directly according to a DC current related signal
Galvanic electricity stream ID C adjusts DC voltage VDC in a default DC current level, and/or according to a DC voltage related signal
In the DC voltage level of an acquiescence, control circuit 32 controls prime switch SP to turn on the DC power supply with plugging in switch SD
And in producing the charge power supply on charge node CHG.
It should be noted that the suitching type voltage-dropping type (buck) that foregoing conversion switch circuit 31 is not limited to shown in figure turns
On-off circuit is changed, it can also be the conversion switch circuit of other forms, such as, but not limited to booster type (boost) or buck
The suitching type conversion switch circuit of type (buck-boost).
Please continue to refer to Fig. 3, in the present embodiment, power-switching circuit 30 can be integrated in example by charging circuit 3 of the invention
A such as integrated circuit is enclosed in an integrated antenna package, thus can reach plug-in and switched-mode power supply conversion at the same time
Charging, has the advantages that easily controllable and reduced size and reduces cost.
It is worth noting that, in one embodiment, plug in switch SD can unconformity in foregoing integrated circuit or collection
Into in circuit package.Referring to Fig. 4, it is another embodiment (charging circuit 4) of the charging circuit of the present invention shown in figure
Schematic diagram, in the present embodiment, power-switching circuit 30 ' does not integrate plug-in switch SD, is realizing that power supply turns with integrated circuit
In the case of changing circuit, power-switching circuit 30 ' can include foot position P1 and P2, be respectively used to the electricity that coupling plugs in switch SD
Stream flows into end and intermediary node MID, and coupling plugs in the control terminal of switch SD with plugging in switch control signal
VCD, still may achieve foregoing various charge modes.
In and charging voltage VCHG (that is, cell voltage of a relatively high) condition relatively low such as DC voltage VDC
Under, even in foregoing each switch be all to be not turned on down, it would still be possible to cause to flow through posting including the foregoing body diode respectively switched
Raw body electric current (parasitic body current), or (reverse current, refer to and charging electricity for reverse current
It is opposite to flow direction)；Please continue to refer to Fig. 3 and Fig. 4, the parasitic body electric current in order to prevent, in one embodiment, prime is opened
It is reversely coupling, and prime that the body diode DBP of SP, which is closed, with the body diode (DB1 or DB2) of change-over switch (S1 or S2)
The body diode DBP for switching SP is also reversely coupling with the body diode DBD for plugging in switch SD, to block this turn
Change the parasitic body electric current of the body diode (DB1, DB2 and DBD) of switch or plug-in switch.It is it should be noted that preceding
State the mode for blocking parasitic body electric current, however it is not limited to the reverse coupling of the body diode between each switch, in an embodiment
In, conversion switch circuit can include such as power diode constant power element, it can also switch the body diode of SP with prime
For anti-phase coupling, and block parasitic body electric current；As long as in short, in the charging current path of suitching type charge mode, have
It is anti-phase coupling to have more than one pair of body diode or body diode and power diode, and blocks parasitic body electric current,
Meet the spirit of the present invention.
Please continue to refer to Fig. 3 and Fig. 4, in one embodiment, prime switch SP can be used for sensing DC current IDC and produce
Foregoing DC current related signal, using the foundation as foregoing adjusting DC current；And in one embodiment, it also can be used to make
The foundation of charging voltage or charging current is adjusted for switch transition switch.
Please continue to refer to Fig. 3 and Fig. 4, in one embodiment, charging circuit 3 or 4, can also include a cable 20 and/or one
Connector 70, is coupled between power supply transmitting element 10 and prime switch SP, wherein the cable 20 meets logical with the connector 70
With Serial Bus Specification or the cable and connector of Universal Serial Bus power supply specification (USB or USB PD), cable 20 and/or company
Connecing device 70 includes a power supply unit and a signal portion, and to couple the DC power supply, which then can be used to the wherein power supply unit
The DC current related signal, and/or the DC voltage related signal, and/or the charging current related signal are transmitted, and/or
The charging voltage related signal；It should be noted that the power supply unit refers to as shown in FIG., the power cord 21 that cable 20 is included
Or the power supply contact 71 that connector 70 is included, and the signal portion refers to as shown in FIG., the signal line that cable 20 is included
22 or the signal contact 72 that is included of connector 70.
Fig. 5 shows the analog waveform schematic diagram of corresponding diagram 3 and Fig. 4, and please refer to Fig. 3, Fig. 4 and Fig. 5, Fig. 5 shows one
The complete charging stage of battery (such as battery 50 of previous embodiment), wherein in t2 to the pre-charging stage between t3, this hair
Bright charging circuit 3 or 4 can be to battery 50 with foregoing suitching type charge mode, and the constant current for carrying out relatively small electric current fills
Electric (such as tiny drop charging), as shown in the figure, wherein DC voltage VDC (solid line of the first half in such as figure) is adjusted to 5V, and such as Fig. 3
With the conversion switch circuit 31 in Fig. 4 then conversion dc voltage VDC and produce the charging current ICHG (void of lower half in such as figure
Line), and adjusted to e.g., about 1A, to carry out constant current precharge to battery 50, prime switch SP is turned on, is straight at this time
Charge switch SD is met to be not turned on.
Please continue to refer to Fig. 5, in t3 to the constant current charging phase between t7, power supply transmitting element 10 can be by direct current
Stream ID C (solid line of lower half in such as figure) is adjusted to constant current, is charged with plug-in pattern to battery 50, as schemed institute
Show, in a preferred embodiment, power supply transmitting element 10 can by DC current IDC in several secondary periods (t3-t4-t5-t6-
T7) be adjusted to several stages of constant current (such as 5A, 4A, 3A and 2A in corresponding diagram), at this time prime switch SP with directly
Charge switch SD is all conducting, and conversion switch circuit 31 is changed without power supply, and charging current ICHG is then generally approximately equal to
DC current IDC.
Please continue to refer to Fig. 5, the constant-potential charge stage after t7, charging circuit 5 carries out battery 50 foregoing
Constant-potential charge, as shown in the figure, in the present embodiment, DC voltage VDC is adjusted to 5V by power supply transmitting element 10, and such as Fig. 3
With the conversion switch circuit 31 in Fig. 4 then conversion dc voltage VDC and produce the charging voltage VCHG (void of the first half in such as figure
Line), and such as 4.2V is adjusted to, to carry out constant-potential charge to battery 50, wherein electric current ICHG is natural depletion.And
The charging termination stage, (end of charge, be not shown) was similar with precharge, and it will not be described here.
In addition, in one embodiment, foregoing prime switch SP and/or plug-in switch SD are most probably in following protection
At least one of operation：(1) DC voltage too high voltages are protected, to according to DC voltage related signal, in DC voltage VDC
During higher than a too high voltages threshold value, prime for example can be switched into SP and/or plug-in switch SD controls to be not turned on, to protect
Protect battery 50 and late-class circuit.(2) excessive current of DC current and/or intermediate current and/or charging current is protected, to
It is high in foregoing each electric current according to DC current related signal and/or intermediate current related signal and/or charging current related signal
When respective excessive current threshold value, prime for example can be switched into SP and/or plug-in switch SD controls to be not turned on, or
Carry out Linear Control and limit electric current, to protect battery 50 and late-class circuit.(3) DC power supply broken string (plug-out) is protected
Shield, to for example according to DC voltage related signal and/or DC current related signal, detecting such as power supply transmitting element 10 is not
During the situation of connection (breaking, plug-out) or non-power transmission, prime for example can be switched into SP and/or the plug-in switchs SD
Control to be not turned on, to protect battery 50 and late-class circuit.
Illustrate the present invention for preferred embodiment above, it is described above, only it is easy to those skilled in the art
Present disclosure is solved, is not used for limiting the interest field of the present invention.Illustrated each embodiment, however it is not limited to individually should
With also can be with combination application.In addition, under the same spirit of the present invention, those skilled in the art can think and various equivalent changes
Change and various combinations, for example, a system switching can be included between conversion switch circuit and battery, can be used to system
Voltage (being used to supply late-class circuit) is further separated with charge power supply；In another example the system switching also can be into horizontal-linearity control.
In another example the arrangement of the body diode current direction in previous embodiment, it is only for example and unrestricted, as long as meeting foregoing anti-
To the relation of coupling, that is, meet spirit of the invention.In another example foregoing power-switching circuit, can also be a linear power supply
Conversion circuit, its charge path share prime switch with plugging in path, that is, meet the spirit of the present invention.In another example this hair
Bright alleged " handled according to certain signal or computing or produce certain output result ", be not limited to according to the signal itself, also wrap
Containing when necessary, which is subjected to Voltage to current transducer, Current Voltage conversion and/or ratio conversion etc., afterwards according to conversion
Signal afterwards is handled or computing produces certain output result.It follows that under the same spirit of the present invention, art technology
Personnel can think and various equivalence changes and various combinations, its combination is a lot of, explanation numerous to list herein.Therefore,
The scope of the present invention should cover above-mentioned and other all equivalence changes.
Claims (14)
1. a kind of charging circuit, charges a battery an input power is converted to a charge power supply, the wherein charging
Power supply includes a charging voltage and a charging current；It is characterized in that, the charging circuit includes：
One power supply transmitting element, the input power is converted to a DC power supply, wherein the DC power supply includes a direct current
Voltage and a DC current；
One power-switching circuit, including：
One conversion switch circuit, couples with an inductor, including an at least change-over switch；
One prime switch, be coupled between the DC power supply and an intermediary node, to turn on the DC power supply and in the intermediary
Intermediary's power supply is produced on node, wherein intermediary's power supply includes a medium voltage and an intermediate current；
One direct charge switch, is coupled between the intermediary node and a charge node；And
One control circuit, is opened to produce a prime switch control signal, a direct charge switch control signal and a conversion
Control signal is closed, is respectively used to control prime switch, plug-in switch and the change-over switch；
Wherein under a suitching type charge mode, which controls the prime switch conduction, plug-in switch not to lead
It is logical and switch the change-over switch and come from to change the dielectric charge power supply is produced in the charge node；
Wherein under a direct charge mode, which controls prime switch and the plug-in switch conduction, makes this
DC power supply is in producing the charge power supply in the charge node.
2. charging circuit as claimed in claim 1, wherein, the change-over switch, prime switch and plug-in switch
Difference respectively has a body diode, and the wherein body diode of prime switch and the body diode of the change-over switch is reverse
Coupling, and the body diode that the body diode of prime switch is switched with the plug-in reversely couples, to block this
One parasitic body electric current of the body diode of change-over switch or plug-in switch.
3. charging circuit as claimed in claim 1, wherein, under the plug-in pattern, the power supply transmitting element is according to one
DC current related signal and adjust the DC current in a default DC current level, and ╱ or according to a DC voltage phase
Close signal and adjust the DC voltage in the DC voltage level of an acquiescence.
4. charging circuit as claimed in claim 1, wherein, prime switch is used to sense the DC current and produce the direct current
Electric current related signal.
5. charging circuit as claimed in claim 1, also comprising a cable Ji ╱ or a connector, are coupled to the power supply and send list
Between member and prime switch, wherein the cable is Ji ╱ or the connector meet universal serial bus specification or Universal Serial Bus
The cable for specification of powering Ji ╱ or connector, the cable Ji ╱ or the connector include a power supply unit and a signal portion, wherein this
Power supply unit is to couple the DC power supply, and the signal portion is transmitting the DC current related signal Ji ╱ or the DC voltage phase
Signal is closed Ji ╱ or the charging current related signal are Ji ╱ or the charging voltage related signal.
6. charging circuit as claimed in claim 1, wherein, prime Kai Guan Ji ╱ or plug-in switch be additionally operable to it is following
At least one of protection operation：(1) DC voltage too high voltages protect (2) DC current Ji ╱ or intermediate current are Ji ╱ or charging
Excessive current protection (3) DC power supply breaking protection of electric current.
7. charging circuit as claimed in claim 1, wherein, the power-switching circuit be integrated in an integrated circuit or enclose in
In one integrated antenna package.
A kind of 8. power-switching circuit, in a charging circuit, which to fill an input power is converted to one
Power supply and to a battery charge, wherein the charge power supply includes a charging voltage and a charging current；The charging circuit bag
Contain：One power supply transmitting element, the input power is converted to a DC power supply, wherein the DC power supply includes a direct current
Pressure and a DC current；It is characterized in that, the power-switching circuit includes：
One conversion switch circuit, couples with an inductor, including an at least change-over switch；
One prime switch, be coupled between the DC power supply and an intermediary node, to turn on the DC power supply and in the intermediary
Intermediary's power supply is produced on node, wherein intermediary's power supply includes a medium voltage and an intermediate current；
One direct charge switch, is coupled between the intermediary node and a charge node；And
One control circuit, is opened to produce a prime switch control signal, a direct charge switch control signal and a conversion
Control signal is closed, is respectively used to control prime switch, plug-in switch and the change-over switch；
Wherein under a suitching type charge mode, which controls the prime switch conduction, plug-in switch not to lead
It is logical and switch the change-over switch and come from to change the dielectric charge power supply is produced in the charge node；
Wherein under a direct charge mode, which controls prime switch and the plug-in switch conduction, makes this
DC power supply is in producing the charge power supply in the charge node.
A kind of 9. power-switching circuit, in a charging circuit, which to fill an input power is converted to one
Power supply and to a battery charge, wherein the charge power supply includes a charging voltage and a charging current；The charging circuit bag
Contain：One power supply transmitting element, the input power is converted to a DC power supply, wherein the DC power supply includes a direct current
Pressure and a DC current；And a direct charge switch, it is coupled between an intermediary node and a charge node；Its feature exists
In the power-switching circuit includes：
One conversion switch circuit, couples with an inductor, including an at least change-over switch；
One prime switch, be coupled between the DC power supply and the intermediary node, to turn on the DC power supply and in the intermediary
Intermediary's power supply is produced on node, wherein intermediary's power supply includes a medium voltage and an intermediate current；
And
One control circuit, is opened to produce a prime switch control signal, a direct charge switch control signal and a conversion
Control signal is closed, is respectively used to control prime switch, plug-in switch and the change-over switch；
Wherein under a suitching type charge mode, which controls the prime switch conduction, plug-in switch not to lead
It is logical and switch the change-over switch and come from to change the dielectric charge power supply is produced in the charge node；
Wherein under a direct charge mode, which controls prime switch and the plug-in switch conduction, makes this
DC power supply is in producing the charge power supply in the charge node.
10. such as 8 or 9 any one of them power-switching circuit of claim, wherein, the change-over switch, prime switch and
Plug-in switch respectively has a body diode, the wherein body diode of prime switch and the change-over switch respectively
Body diode reversely couples, and the body diode of prime switch and the reverse coupling of body diode of plug-in switch
Connect, to block the one of the body diode of the change-over switch or plug-in switch parasitic body electric current.
11. such as 8 or 9 any one of them power-switching circuit of claim, wherein, under the plug-in pattern, the power supply
Transmitting element adjusts the DC current in a default DC current level, and ╱ or root according to a DC current related signal
The DC voltage is adjusted according to a DC voltage related signal in the DC voltage level of an acquiescence.
12. such as 8 or 9 any one of them power-switching circuit of claim, wherein, prime switch is used to sense the direct current
Flow and produce the DC current related signal.
13. such as 8 or 9 any one of them power-switching circuit of claim, wherein, prime Kai Guan are Ji ╱ or the plug-in
Switch is additionally operable at least one of following protection operation：(1) DC voltage too high voltages protect (2) DC current Ji ╱ or intermediary
Electricity Liu are Ji the excessive current of ╱ or charging current protects (3) DC power supply breaking protection.
14. such as 8 or 9 any one of them power-switching circuit of claim, also it is integrated in an integrated circuit or encloses in one
In integrated antenna package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/628,109 US10177420B2 (en) | 2016-10-21 | 2017-06-20 | Charger circuit and power conversion circuit thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662411171P | 2016-10-21 | 2016-10-21 | |
| US62/411,171 | 2016-10-21 |
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| CN107979121A true CN107979121A (en) | 2018-05-01 |
| CN107979121B CN107979121B (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710256513.2A Active CN107979121B (en) | 2016-10-21 | 2017-04-19 | Charging circuit and power conversion circuit thereof |
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| Country | Link |
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| CN (1) | CN107979121B (en) |
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| TWI688179B (en) * | 2018-08-20 | 2020-03-11 | 緯創資通股份有限公司 | Overcurrent protection circuit and method thereof |
| CN111835044A (en) * | 2019-04-17 | 2020-10-27 | 安克创新科技股份有限公司 | Charging device, load device, and charging system |
| CN111835045A (en) * | 2019-04-17 | 2020-10-27 | 安克创新科技股份有限公司 | Charging device and load device |
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| CN111835044A (en) * | 2019-04-17 | 2020-10-27 | 安克创新科技股份有限公司 | Charging device, load device, and charging system |
| CN111835045A (en) * | 2019-04-17 | 2020-10-27 | 安克创新科技股份有限公司 | Charging device and load device |
| CN111835044B (en) * | 2019-04-17 | 2024-06-21 | 安克创新科技股份有限公司 | Charging device, load device, and charging system |
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|---|---|
| CN107979121B (en) | 2020-02-07 |
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