CN109120024A - Charging unit with multiple power source path - Google Patents
Charging unit with multiple power source path Download PDFInfo
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- CN109120024A CN109120024A CN201810521752.0A CN201810521752A CN109120024A CN 109120024 A CN109120024 A CN 109120024A CN 201810521752 A CN201810521752 A CN 201810521752A CN 109120024 A CN109120024 A CN 109120024A
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- 238000007600 charging Methods 0.000 title claims abstract description 121
- 238000006243 chemical reaction Methods 0.000 claims abstract description 84
- 238000010277 constant-current charging Methods 0.000 claims abstract description 6
- 238000010280 constant potential charging Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000003071 parasitic effect Effects 0.000 claims description 8
- 238000013519 translation Methods 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Classifications
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- H02J7/0077—
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- H02J7/025—
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of charging unit with multiple power source path includes DC switch circuit, wireless power source unit, condenser type power conversion unit and switched-mode power supply converting unit.Charging unit operates in one of following mode: in constant-current mode, condenser type power conversion unit converts the bus current that DC switch circuit or wireless power source unit provide and generates preset constant charge current in charge node, to carry out constant current charging to battery, wherein constant charge current is a presupposition multiple greater than 1 of bus current.In constant-voltage mode, switched-mode power supply converting unit converts the bus voltage that DC switch circuit or wireless power source unit provide and generates preset charging voltage in charge node to carry out constant voltage charging to battery.In external output mode, the voltage of switched-mode power supply converting unit conversion battery and in coffret pin to generate an external output voltage.
Description
Technical field
The present invention relates to a kind of charging units, particularly relate to a kind of charging unit with multiple power source path.
Background technique
Preceding case relevant to the application has: Chinese patent application CN 201710169057.8, CN 201710173266.X,
CN 201710256513.2 and CN 201710256910.X.
Fig. 1 shows a kind of charging unit (charging unit 1) with multiple power source path of prior art, charging unit 1
Suitching type charging circuit 60 comprising one with dual input pin (VBUS1 and VBUS2 in such as figure), can be drawn by coffret
Foot 20 and input pin VBUS1, which are received, comes from power supply provided by such as power supply adaptor, or is connect by input pin VBUS2
It receives and comes from power supply provided by wireless power source unit 40, wherein wireless power source unit 40 receives a nothing from a wireless receiving coil L1
Line input voltage VAC, and it is converted into DC voltage VWP, above two power source may be selected in suitching type charging circuit 60
One of, and aforementioned power source is converted by switched-mode power supply conversion regime and generates charge power supply (VBAT in such as figure), to right
Battery 50 carries out constant-current mode or constant-voltage mode charging, or provides 70 power supply of circuit system (VSYS in such as figure).
The prior art shown in Fig. 1, its shortcoming is that, if being intended to through coffret pin 20 or wireless power source circuit 40
It carries out for example biggish constant current to plug in, then needs in addition to design the electric power loop plugged in, and straight using having
It is required if being intended to charge to battery 50 with biggish plug-in electric current (such as 8A) when connecing the power supply adaptor of charging ability
Using the dedicated quick charge cable that line footpath is thicker, in addition to because using caused by non-standard cable other than the inconvenience of user, quickly
Charging cables are not also because line footpath is relatively thick pliable without being easy to use, in addition, this is in the prior art, suitching type charging circuit 60
There are two input pin (VBUS1 and VBUS2 in such as figure) for tool, will cause higher cost and biggish circuit size.
The prior art of the present invention compared to Fig. 1, advantage are that the charging current that can provide multiplication charges to battery, can contract
Short charging time, but such as USB cable standard cable can be used, it operates under relatively low cable electric current, conveniently makes
The application of user, and the suitching type charging circuit of two input pins of need not have, can reduce cost；In addition, of the invention fills
Electric installation has multiple power source path therefore, can be according to not including different power inputs and different power supply conversion regimes
Same charging or power demands, and the most power input of efficiency is taken to combine with power supply conversion regime, to carry out battery charging
Or it powers to circuit system.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, propose a kind of filling with multiple power source path
Electric installation, the charging current that can provide multiplication charge to battery, shorten the charging time, and standard cable can be used, conveniently make
The application of user, and the suitching type charging circuit of two input pins of need not have, can reduce cost；It can be according to different chargings
Or power demands, and the most power input of efficiency is taken to combine with power supply conversion regime, to carry out battery charging or to system
Circuit power supply.
In order to achieve the above-mentioned object of the invention, one of viewpoint is sayed that the present invention provides a kind of charging units, includes:
One DC switch circuit, including an at least dc switch, to control the conducting of a coffret pin and a supply node with
It is not turned on；One wireless power source unit is coupled between a wireless receiving coil and the supply node, to from the wireless receiving line
Circle receives one and is wirelessly input to voltage；One condenser type power conversion unit, is coupled between the supply node and a charge node, packet
Multiple capacitive battery source changeover switches are included, to switch an at least changeover condenser；And a suitching type power conversion unit, coupling
It is connected between the supply node and the charge node, including an at least suitching type transfer switch, to switch an inductance；Its
In the charging unit operate at least one following mode: (1) in a constant-current mode, the DC switch circuit is from the biography
Defeated interface pin is connected a direct current input current and generates a preset bus current or the wireless power source list to the supply node
Member converts this and is wirelessly input to voltage and generates the preset bus current in the supply node；Wherein condenser type power supply conversion is single
Member is with condenser type power supply conversion regime, from the supply node, converts the preset bus current and generates one in the charge node
Preset constant charge current, to carry out constant current charging to the battery for being coupled to the charge node, wherein this is constant
One presupposition multiple of the charging current substantially preset bus current, the presupposition multiple are greater than 1；(2) in a constant voltage
In mode, which is connected a DC input voitage from the coffret pin and generates one in advance to the supply node
If the first bus voltage or the wireless power source cell translation this be wirelessly input to voltage and in the supply node generate this default first
Bus voltage；Wherein the switched-mode power supply converting unit is with switched-mode power supply conversion regime, and from the supply node, it is default to convert this
First bus voltage and in the charge node generate a preset charging voltage, to the battery carry out constant voltage charging；
(3) in a tiny drop current-mode, which is connected the DC input voitage to the confession from the coffret pin
Electrical nodes and generate default first bus voltage or the wireless power source cell translation this be wirelessly input to voltage and in the power supply section
Point generates default first bus voltage；Wherein the switched-mode power supply converting unit is with switched-mode power supply conversion regime, from the confession
Electrical nodes convert default first bus voltage and generate a preset tiny drop charging current in the charge node, to this
Battery carries out the charging of tiny drop electric current；(4) in the first external output mode, the switched-mode power supply converting unit is with switched-mode power supply
Conversion regime converts the voltage of the battery and generates default second bus voltage in the supply node from the charge node；Its
In the DC switch circuit from the supply node default second bus voltage is connected to the coffret pin to generate a pair
Outer output voltage；(5) in the second external output mode, the condenser type power conversion unit with condenser type power supply conversion regime,
The voltage of the battery is converted from the charge node and generates default second bus voltage in the supply node；And the dc switch
Circuit converts default second bus voltage from the supply node and generates the external output voltage in the coffret pin,
In the second bus voltage substantially battery voltage a predeterminated voltage multiple, the predeterminated voltage multiple be greater than 1；And
(6) in the external output mode of third, the wireless power source cell translation this be wirelessly input to voltage and generate in the supply node should
Default second bus voltage；And the DC switch circuit from the supply node convert default second bus voltage and in the transmission
Interface pin 20 generates the external output voltage.
In a preferred embodiment, a power supply transmission unit converts an input power, and produces via the coffret pin
The raw direct current input current or the DC input voitage, and the power supply transmission unit adjusts the direct current input current to one preset
Input current level, or the DC input voitage is adjusted to a preset input voltage level, in the corresponding production of the supply node
The raw preset bus current or default first bus voltage.
In a preferred embodiment, which further includes a direct current ON-OFF control circuit, is opened to control the direct current
Powered-down road, wherein the dc switch control circuit also in the DC input voitage of the coffret pin be more than an excessively high electricity
When pressing threshold value, controlling the DC switch circuit is to be not turned on, to protect the circuit for being coupled to the supply node.
In a preferred embodiment, which includes the first dc switch and the second dc switch, wherein
The body diode of first dc switch and the body diode of second dc switch reversely couple each other, to block this
The parasitic ontology electric current of the one of the body diode of first dc switch or second dc switch.
In a preferred embodiment, which includes: a rectification circuit, is coupled to the wireless receiving coil,
A rectified voltage is generated this is wirelessly input to voltage commutation；An at least wireless power source conversioning transistor, is coupled to this
Between rectified voltage and the supply node；And a wireless charging control circuit, to control the wireless power source conversion crystal
Pipe to convert the rectified voltage, and generates default first bus voltage or the preset bus current in the supply node.
In a preferred embodiment, which further includes a conversion control circuit, to control this
Multiple change-over switches, wherein for the conversion control circuit in multiple switch periods, the multiple change-over switch of respective operations makes this extremely
A few changeover condenser is periodically corresponding to be coupled to an at least Charge Proportional voltage node, the supply node and a ground connection
Between point a pair of of node therein, being generated with converting default first bus voltage from the supply node in the charge node should
Preset constant charge current or the preset charging voltage, or from the charge node convert the voltage of the battery and in the power supply
Node generates default second bus voltage；Wherein the charge node is coupled to one in an at least Charge Proportional voltage node
Node.
In a preferred embodiment, which includes first and second changeover condenser, multiple switch period
Including first and second switch period；Wherein the conversion control circuit controls multiple change-over switch, makes the first conversion capacitor
The first end of device respectively corresponds switching in first switch period and second switch period and is electrically connected in the power supply section
Between point and the charge node, and make the second end of first changeover condenser when first switch period and second conversion
Switching is respectively corresponded in section and is electrically connected between the charge node and the grounding point, and makes the of second changeover condenser
One end respectively corresponds switching in second switch period and first switch period and is electrically connected in the supply node and is somebody's turn to do
Between charge node, and divide the second end of second changeover condenser in second switch period and first switch period
It Dui Ying not switch and be electrically connected between the charge node and the grounding point, so that substantially this is pre- for the constant charge current
If 2 times of bus current, or make 2 times of voltage of the second bus voltage substantially battery.
In a preferred embodiment, the inductance coupling is between a switching node and the charge node；At least one switching
Formula transfer switch includes: a switch on the bridge, is coupled between the supply node and the switching node；And once bridge is opened
It closes, is coupled between the switching node and a grounding point；The switched-mode power supply converting unit further includes a control switching circuit, is used
To control the switch on the bridge and the bridge switch, with the switched-mode power supply conversion regime of buck, boost type or step-down/up type, in
The charge node generates the preset charging voltage or the preset tiny drop charging current, or with switched-mode power supply conversion regime in
The supply node generates default second bus voltage.
In a preferred embodiment, which further includes an electric power loop transistor, coupled in series in the inductance with
Between the charge node, wherein the first end of the electric power loop transistor and the inductance are directly connected in one by electrical nodes, the
Two ends are directly connected in the charge node；Wherein a circuit system using this by the system voltage on electrical nodes as power supply.
In a preferred embodiment, the voltage difference of electric power loop the transistor controls system voltage and the battery, so that
The system voltage is not less than a preset system voltage threshold value.
In a preferred embodiment, the voltage difference of electric power loop the transistor controls system voltage and the battery, in
The charge node generates the preset charging voltage or the preset tiny drop charging current and charges to the battery.
Below by way of specific embodiment elaborate, should be easier to understand the purpose of the present invention, technology contents, feature and
The effect of it is realized.
Detailed description of the invention
Fig. 1 shows a kind of block diagram of prior art charging unit with multiple power sources path；
Fig. 2A-Fig. 2 F shows the embodiment block diagram of the charging unit with multiple power sources path of the invention, Yi Jiduo
The schematic diagram of kind power source path；
Fig. 3 shows another embodiment block diagram of the charging unit with multiple power sources path of the invention；
Fig. 4 A shows an embodiment block diagram of the charging unit with multiple power sources path of the invention；
Fig. 4 B- Fig. 4 C shows in charging unit of the invention, the embodiment schematic diagram of DC switch circuit；
Fig. 5 shows in charging unit of the invention, a kind of embodiment schematic diagram of wireless power source unit；
Fig. 6 A- Fig. 6 B shows in charging unit of the invention, the embodiment schematic diagram of condenser type power conversion unit；
Fig. 7 shows in charging unit of the invention, a kind of specific embodiment schematic diagram of condenser type power conversion unit；
Fig. 8 A- Fig. 8 B shows in charging unit of the invention, the specific embodiment schematic diagram of switched-mode power supply converting unit,
And the schematic diagram in multiple power sources path；
Fig. 9 shows an embodiment block diagram of the charging unit with multiple power sources path of the invention and therein
Electric power loop transistor schematic.
Specific embodiment
Attached drawing in the present invention belongs to signal, is mostly intended to indicate coupling relationship and each signal waveform between each circuit
Between relationship, as circuit, signal waveform and frequency then and not according to ratio draw.
Fig. 2A is please referred to, is as shown in the figure a kind of embodiment (charging unit 2) of charging unit of the invention, charging unit
2 include DC switch circuit 10, and wireless power source unit 40, condenser type power conversion unit 30 and switched-mode power supply conversion are single
Member 60.DC switch circuit 10, including an at least dc switch, to control coffret pin 20 and supply node NBS's
It is connected and is not turned on.Wireless power source unit 40 is coupled between wireless receiving coil L1 and supply node NBS, wirelessly to connect certainly
Take-up circle L1 reception is wirelessly input to voltage VAC.Condenser type power conversion unit 30 is coupled to supply node NBS and charge node
Between NCH, including multiple capacitive battery source changeover switches, to switch an at least changeover condenser (such as C1- shown in figure
CN, N are natural number).Switched-mode power supply converting unit 60 is coupled between supply node NBS and charge node NCH, including at least
One suitching type transfer switch, to switch inductance L2.
According to the present invention, through the above configuration, charging unit 2 is operable in several modes, will be described hereafter.
Please continue to refer to Fig. 2A, in one embodiment, in a constant-current mode, DC switch circuit 10 connects from transmission
Mouthful pin 20 conducting direct current input current IDC to supply node NBS and generate preset bus current IBUS (grey be real in such as figure
The power delivery direction of line arrow), and in another embodiment, it can also be converted by wireless power source unit 40 and be wirelessly input to voltage
VAC and generate preset bus current IBUS (the power delivery direction of the dash-dotted gray line arrow in such as figure) in supply node NBS.
Wherein coffret pin 20 is, for example, the VBUS pin of USB or USB PD specification.
Please continue to refer to Fig. 2A, in the present embodiment, condenser type power conversion unit 30 with condenser type power supply conversion regime, from
Supply node NBS converts preset bus current IBUS and generates preset constant charge current ICH in charge node NCH, uses
To carry out constant current charging to the battery 50 for being coupled to charge node NCH, wherein constant charge current ICH is substantially default
Bus current IBUS presupposition multiple K, presupposition multiple K be greater than 1.
It should be noted that: mutual matching is not necessarily managed between the ghost effect of itself or part because of circuit component
Think, therefore, although charging current ICH to be made is the presupposition multiple K of preset bus current IBUS, the charging actually generated is electric
Stream ICH may not be accurate K times of preset bus current IBUS, and be only close to K times, it is, according to the present invention,
It is subjected to the undesirable property due to circuit and causes flow increasing multiple K that there is a degree of error, this " generally " i.e. above-mentioned
For the meaning of the presupposition multiple K of preset bus current IBUS, it is also identical to mention " generally " place for other herein.
According to the present invention, due to the presupposition multiple K of the substantially preset bus current IBUS of constant charge current ICH,
Therefore, biggish charging current ICH (such as 8A, in K can be converted to lesser preset bus current IBUS (such as 4A)
In the case where 2), the charging time is both shortened, while standard cable can also be used (such as to be connected to biography with standard USB cable
Defeated interface pin 20), or for wireless power source circuit, it can be because of lesser output electric current (namely by wireless power source
Bus current IBUS provided by circuit), and have higher wireless power source transfer efficiency.
Fig. 2 B is please referred to, in one embodiment, in a constant-voltage mode, DC switch circuit 10 draws from coffret
Foot 20 conducting direct current input voltage VDC to supply node NBS and generate default first bus voltage VBUS1 (grey be real in such as figure
The power delivery direction of line arrow), and in another embodiment, it can also be converted by wireless power source unit 40 and be wirelessly input to voltage
VAC and generate default (the power delivery side of the dash-dotted gray line arrow in such as figure first bus voltage VBUS1 in supply node NBS
To).
Please continue to refer to Fig. 2 B, in the present embodiment, switched-mode power supply converting unit 60 with switched-mode power supply conversion regime, from
Supply node NBS converts default first bus voltage VBUS1 and generates preset charging voltage VCH in charge node NCH, uses
To carry out constant voltage charging to battery 50.
Fig. 2 C is please referred to, in one embodiment, in a tiny drop current-mode, DC switch circuit 10 draws from coffret
Foot 20 conducting direct current input voltage VDC to supply node NBS and generate default first bus voltage VBUS1 (grey be real in such as figure
The power delivery direction of line arrow) or the conversion of wireless power source unit 40 be wirelessly input to voltage VAC and generated in supply node NBS
Default first bus voltage VBUS1 (the power delivery direction of the dash-dotted gray line arrow in such as figure).
Please continue to refer to Fig. 2 C, in the present embodiment, switched-mode power supply converting unit 60 with switched-mode power supply conversion regime, from
Supply node NBS converts default first bus voltage VBUS1 and generates preset tiny drop charging current in charge node NCH
ITC, to carry out the charging of tiny drop electric current to battery 50.
Fig. 2 D is please referred to, in one embodiment, in an external output mode, switched-mode power supply converting unit 60 is to switch
Formula power supply conversion regime, self-charging node NCH, the voltage VBAT of conversion battery 50 and generate default second in supply node NBS
Bus voltage VBUS2 (the power delivery direction of grey filled lines arrow in such as figure).Please continue to refer to Fig. 2 D, in the present embodiment, directly
It flows switching circuit 10 and confesses that the default second bus voltage VBUS2 of electrical nodes NBS conducting is external to generate to coffret pin 20
Output voltage VO TG.In the present embodiment, external output mode can correspond to OTG (On-The-Go) rule of such as USB transmission interface
Model can power to external circuit (such as, but not limited to USB flash disk) by coffret pin 20 by battery.
In addition, according to the invention, it is further possible to other power source paths provide external output voltage VO TG.Fig. 2 E is please referred to, this
In embodiment, under external output mode, condenser type power conversion unit 30 is with condenser type power supply conversion regime, self-charging node
NCH, the voltage VBAT of conversion battery 50 and generate default second bus voltage VBUS2 in supply node NBS (grey be real in such as figure
The power delivery direction of line arrow).Please continue to refer to Fig. 2 E, in the present embodiment, DC switch circuit 10 confesses that electrical nodes NBS turns
It changes default second bus voltage VBUS2 and generates external output voltage VO TG in coffret pin 20.Wherein the second bus electricity
A predeterminated voltage multiple J of the VBUS2 substantially voltage VBAT of battery 50, the predeterminated voltage multiple J is pressed to be greater than 1.It is wherein straight
Flowing the mode that switching circuit 10 confesses that electrical nodes NBS converts default second bus voltage VBUS2 may include such as, but not limited to leading
Logical default second bus voltage VBUS2 or linear transformation are preset the second bus voltage VBUS2 and are generated in coffret pin 20
External output voltage VO TG.
Please refer to Fig. 2 F, in the present embodiment, under an external output mode, the conversion of wireless power source unit 40 is wirelessly input to electricity
It presses VAC and generates preset second bus voltage VBUS2 in supply node NBS, and DC switch circuit 10 can be for example but unlimited
In in a manner of conducting or linear transformation, confession electrical nodes NBS convert default second bus voltage VBUS2 and in coffret pin
20 generate external output voltage VO TG (the power delivery direction of grey filled lines arrow in such as figure).
In conclusion charging unit of the invention, it can be according to different charge requirements or supplying power for outside demand, by a variety of
It transmits power source path to power to external circuit to the charging of the progress different mode of battery 50 or the electric power of conversion battery, tool
There is high flexibility, and shortening the rechargable battery time, is faced upward, reached in many ways using standard cable and power supply conversion efficiency etc.
Optimal balance.
Referring to Fig. 3, being as shown in the figure a kind of embodiment (charging unit 3) of charging unit of the invention, implement one
In example, a power supply transmission unit 80 converts input power VIN, and generates direct current input current IDC via coffret pin 20
Or DC input voitage VDC, and power supply transmission unit 80 adjusts the preset input current level of direct current input current IDC to one,
Or the preset input voltage level of DC input voitage VDC to one is adjusted, in the corresponding preset bus of generation of supply node NBS
Electric current IBUS or default first bus voltage VBUS1.The power supply transmission unit 80 may be, for example, a power supply adaptor, will exchange
The input power VIN of form is converted to direct current input current IDC or DC input voitage VDC above-mentioned, or can be straight for a direct current
Conversion circuit is flowed, the input power VIN from such as mobile power source (power bank) is converted into direct current above-mentioned and inputs electricity
Stream ID C or DC input voitage VDC.In one embodiment, power supply transmission unit 80 can be by cable 22 (such as, but not limited to
USB cable) and DC switch circuit 10 is connected to via coffret pin 20.And in one embodiment, cable 22 can omit
And it is short circuit.
Fig. 4 A is please referred to, is as shown in the figure a kind of embodiment (charging unit 4) of charging unit of the invention, the present embodiment
In, charging unit 4 further includes dc switch control circuit 38, to control DC switch circuit 10, wherein dc switch control
Circuit 38 also when the DC input voitage VDC of coffret pin 20 is more than a too high voltages threshold value VOV, controls dc switch
Circuit 10 is to be not turned on, and to protect the circuit for being coupled to supply node NBS, includes, but not limited to, e.g. wireless power source list above-mentioned
Member 40, condenser type power conversion unit 30 and switched-mode power supply converting unit 60.In one embodiment, as shown in Figure 4 A, direct current
ON-OFF control circuit 38 can be located in condenser type power conversion unit 30, but be also not necessarily limited to this, in other embodiments, stream switch
Control circuit 38 can not be located in condenser type power conversion unit 30.
Fig. 4 B- Fig. 4 C is please referred to, as shown in the figure in charging unit of the invention, a kind of embodiment of DC switch circuit
(DC switch circuit 10), DC switch circuit 10 include the first dc switch QD1 and the second dc switch QD2, wherein the
The body diode DB2 of the body diode DB1 of one dc switch QD1 and the second dc switch QD2 is reversely coupled each other, to
Block a parasitic ontology electric current of the body diode of the first dc switch QD1 or the second dc switch QD2.Parasitic ontology electric current
Refer to, under the conditions of and bus voltage VBUS relatively low in such as DC voltage VDC is relatively high (vice versa), even if respectively
Switch is all to be not turned on, it would still be possible to cause to flow through the parasitic ontology electric current including the aforementioned body diode respectively switched
(parasitic body current), and the configuration of the aforementioned body diode reversely coupled each other can avoid parasitism ontology
Electric current.In one embodiment, the electric current outflow end of body diode DB1 and body diode DB2 is connected to each other (such as Fig. 4 B institute
Show), in another embodiment, the electric current of body diode DB1 and body diode DB2 flow into end and are connected to each other (such as Fig. 4 C institute
Show).
Referring to Fig. 5, as shown in the figure in charging unit of the invention, a kind of embodiment of wireless power source unit is (wireless
Power supply unit 40), wireless power source unit 40 includes rectification circuit 41, an at least wireless power source conversioning transistor QW1, and wireless
Charging control circuit 42.Rectification circuit 41 is coupled to wireless receiving coil L1, generates will be wirelessly input to voltage VAC rectification
One rectified voltage VREC, rectification circuit 41 may be, for example, half-bridge or full bridge rectifier either synchronously or asynchronously.Wherein this is at least
One wireless power source conversioning transistor QW1 is coupled between rectified voltage VREC and supply node NBS.Wireless charging control circuit
42, to control wireless power source conversioning transistor QW1, to convert rectified voltage VREC, and generate pre- in supply node NBS
If the first bus voltage VBUS1 or preset bus current IBUS.In one embodiment, wireless power source unit 40 further includes one inverse
Only transistor QW2, and wireless power source conversioning transistor QW1 coupled in series, to block the parasitic ontology electric current of transistor QW1,
Wherein the body diode of transistor QW2 and QW1 reversely couples each other.In implementing one, check transistor QW2 can be omitted and is
Short circuit.In implementing one, wireless power source conversioning transistor QW1 can also be omitted and is short circuit, it is, after rectification circuit 41 rectifies
Directly generate default first bus voltage VBUS1.
It is worth noting that, as above-mentioned function check transistor, can also coupled in series in condenser type power conversion unit
30 or switched-mode power supply converting unit 60 current path on, respectively to blocking capacitor formula power conversion unit 30 or suitching type
The parasitic ontology electric current that may occur in power conversion unit 60.
Fig. 6 A is please referred to, as shown in the figure in charging unit of the invention, one kind of condenser type power conversion unit is specific
Embodiment (condenser type power conversion unit 30), condenser type power conversion unit 30 further include a conversion control circuit 31, to
Control multiple change-over switches, wherein conversion control circuit 31 is in multiple switch periods, the multiple change-over switches of respective operations, make to
A few changeover condenser periodically it is corresponding be coupled to an at least Charge Proportional voltage node (such as ND1 in corresponding diagram 6A or
ND1-NDM, wherein M is natural number), between supply node NBS and a grounding point GND a pair of of node therein, in charging
Node NCH generates preset constant charge current ICH or preset charging voltage VCH；Wherein charge node NCH is coupled at least
A node (such as being coupled to ND1 as shown in the figure) in one Charge Proportional voltage node, so that constant charge current ICH is generally
For preset bus current IBUS the substantially preset bus voltage VBUS1 of presupposition multiple K or charging voltage VCH it is pre-
If multiple 1/K.In a preferred embodiment, K is the real number greater than 1, it is, charging current ICH is greater than direct current input current
IDC, therefore charging circuit of the invention can be in the case where direct current input current IDC be constant, with relatively large charging electricity
It flows ICH to charge to battery 50, shortens the charging time.In one embodiment, condenser type power conversion unit 30 is such as, but not limited to
It may include the charge pump (divider charge pump) or capacitive partial pressure circuit (capacitive except French
) or condenser type electric current multiple circuit (capacitive current multiplier) divider.
Please refer to Fig. 6 B, in the present embodiment, under an external output mode, condenser type power conversion unit 30 can be similar
In the handover operation mode of above-mentioned multiple change-over switches and an at least changeover condenser, self-charging node NCH, conversion battery 50
Voltage VBAT and generate default second bus voltage VBUS2 in supply node NBS so that the second bus voltage VBUS2 is generally
For the predeterminated voltage multiple J of the voltage VBAT of battery 50, the external output mode of earlier figures 2E is corresponded to realization.
Referring to Fig. 7, being as shown in the figure a kind of specific reality of condenser type power conversion unit in charging unit of the invention
Example (condenser type power conversion unit 30) is applied, as shown, changeover condenser includes first and second changeover condenser C1 and C2,
In the present embodiment, multiple switch periods as the aforementioned include first and second switch period；Wherein in constant-current mode, turn
It changes control circuit 31 and controls multiple change-over switches (SW1-SW8 such as, but not limited to as shown in the figure), make the first changeover condenser
The first end of C1 respectively corresponded in the first switch period and the second switch period switching and be electrically connected in supply node NBS with
Between charge node NCH, and divide the second end of the first changeover condenser C1 in the first switch period and the second switch period
It Dui Ying not switch and be electrically connected between charge node NCH and grounding point GND, and make the first end of the second changeover condenser C2
Switching is respectively corresponded in the second switch period and the first switch period and is electrically connected in supply node NBS and charge node
Between NCH, and respectively corresponds the second end of the second changeover condenser C2 in the second switch period and the first switch period and cut
It changes and is electrically connected between charge node NCH and grounding point GND, so that constant charge current ICH is substantially preset total
2 times of line current IBUS.
Similarly, the mode of operation that the embodiment of Fig. 7 can also be similar realizes the external output mould of corresponding earlier figures 2E
Formula.
Fig. 8 A- Fig. 8 B is please referred to, as shown in the figure in charging unit of the invention, the tool of switched-mode power supply converting unit 60
Body embodiment (switched-mode power supply converting unit 60), as shown in Figure 8 A and 8 B, in the present embodiment, inductance L2 is coupled to a switching
Between node LX and charge node NCH, a wherein at least suitching type transfer switch includes: that switch on the bridge QU and lower bridge are opened
Close QD.Switch on the bridge QU is coupled between supply node NBS and switching node LX；Bridge switch QD be coupled to switching node LX with
Between one grounding point GND；Control switching circuit 61 is to control switch on the bridge QU and bridge switch QD.Please refer to Fig. 2 B-
Fig. 2 D, in one embodiment, switched-mode power supply converting unit 60 can in charge node NCH generate preset charging voltage VCH or
Preset tiny drop charging current ITC, to the charging of battery 50 (as shown in Fig. 8 A and Fig. 2 B- Fig. 2 C).And in another embodiment
In, switched-mode power supply converting unit 60 can generate as the aforementioned default the in supply node NBS with switched-mode power supply conversion regime
Two lines bus voltage VBUS2 (as shown in Fig. 8 B and Fig. 2 D), to generate external output voltage VO TG, wherein VOTG can be for for example but not
It is limited to meet the voltage of USB OTG specification.For a viewpoint, when switched-mode power supply converting unit 60 operates in constant voltage mould
When formula or tiny drop current-mode, as the embodiment of Fig. 8 A operates in voltage-dropping type switched-mode power supply translative mode；And when suitching type electricity
When source converting unit 60 operates in external output voltage mode, as the embodiment of Fig. 8 B operates in the conversion of booster type switched-mode power supply
Mode." switched-mode power supply conversion regime " above-mentioned is not limited to voltage-dropping type switched-mode power supply framework as shown in the figure (with charging
For direction), it can also be the switched-mode power supplies translative mode such as booster type or buck-boost type in other embodiments.In addition, according to
The demand of above-mentioned different mode, control switching circuit 61 can accordingly control switched-mode power supply converting unit 60 and operate in constant current
Or the switched-mode power supply translative mode of constant voltage.
Referring to Fig. 9, being as shown in the figure another embodiment (charging unit 9) of charging unit of the invention, charging dress
Set 9 similar with the charging unit 2 of Fig. 2A-Fig. 2 F, charging unit 9 further includes an electric power loop transistor QPP, and coupled in series is in electricity
Feel between L2 and charge node NCH, wherein the first end of electric power loop transistor QPP is directly connected in one with inductance L2 and is saved by electricity
Point NSYS, second end are directly connected in charge node NCH；In one embodiment, circuit system 70 is by electrical nodes NSYS
System voltage VSYS be power supply.In one embodiment, electric power loop transistor QPP control system voltage VSYS and battery 50
Voltage difference, so that system voltage is not less than a preset system voltage threshold value VTH.In one embodiment, electric power loop transistor
QPP is controllable to be connected, so that cell voltage (VBAT or VCH namely as the aforementioned) is directly electrically connected in system voltage
VSYS, and in one embodiment, electric power loop transistor QPP can be according to the voltage status of battery 50 and the power supply of circuit system 70
Demand and control its conducting degree, such as, but not limited to control electric power loop transistor QPP to adjust electric power loop transistor QPP
Conducting resistance, or control electric power loop transistor QPP to be to adjust charging voltage VCH or charging current ICH etc., and to battery
50 carry out constant voltage, constant current or the charging of tiny drop electric current.
Please continue to refer to Fig. 9, in one embodiment, electric power loop transistor may include one-transistor, and implement one
In example, electric power loop transistor may include multiple transistors.In one embodiment, as shown, electric power loop transistor QPP packet
The well region W of changeable bias level is included, it can be according to the drain-source voltage relationship or current direction of electric power loop transistor QPP
And adaptively switch the bias level of well region W, so that it is electrically connected in the leakage of electric power loop transistor QPP
Pole or source electrode.
Comprising electric power loop transistor QPP and in the case where circuit system 70, according to the present invention, charging unit 9 is still
Various operation modes above-mentioned can be performed, include, but not limited to, e.g. the constant current mould as described in the examples of Fig. 2A-Fig. 2 F
Previous example also can be performed in formula, constant-voltage mode, tiny drop current-mode and external output mode, in other words, charging unit 9
The supply of power supply shown in such as, but not limited to, Fig. 2A-Fig. 2 F and transduction pathway.
Illustrate the present invention for preferred embodiment above, but described above, is only easy to those skilled in the art
Understand the contents of the present invention, interest field not for the purpose of limiting the invention.Illustrated each embodiment, however it is not limited to individually
Using, it can also be with combined application, for example, two or more embodiments can be with united application, and the portion in an embodiment
It is grouped as and is also substituted for corresponding building block in another embodiment.In addition, under same spirit of the invention, this field
Technical staff is contemplated that various equivalence changes and various combinations, for example, in embodiment above-mentioned, in constant current mould
Under formula, power supply conversion is carried out with condenser type power conversion unit 30, and constant current charging is carried out to battery, so according to the present invention
Spirit be not limited to this, under constant-current mode, power supply conversion can also be carried out with switched-mode power supply converting unit 60, and it is right
Battery carries out constant current charging.In another example " carrying out processing or operation according to certain signal or generating certain output to tie alleged by the present invention
Fruit " is not limited to itself the signal be carried out Voltage to current transducer, Current Voltage turns also comprising when necessary according to the signal
Change and/or ratio conversion etc., later according to the signal after conversion carry out processing or operation generate certain output result.It follows that
Under same spirit of the invention, it may occur to persons skilled in the art that various equivalence changes and various combinations, a combination thereof side
There are many formula, explanation numerous to list herein.Therefore, the scope of the present invention should cover above-mentioned and other all equivalence changes.
Claims (11)
1. a kind of charging unit, includes:
One DC switch circuit, including an at least dc switch, to control leading for a coffret pin and a supply node
Lead to and is not turned on；
One wireless power source unit is coupled between a wireless receiving coil and the supply node, to from the wireless receiving coil
It receives one and is wirelessly input to voltage；
One condenser type power conversion unit, is coupled between the supply node and a charge node, including multiple condenser type power supplys
Change-over switch, to switch an at least changeover condenser；And
One suitching type power conversion unit, is coupled between the supply node and the charge node, including at least suitching type electricity
Source changeover switch, to switch an inductance；
Wherein the charging unit operates at least one following mode:
(1) in a constant-current mode, which is connected a direct current input current extremely from the coffret pin
The supply node and generate a preset bus current or the wireless power source cell translation this be wirelessly input to voltage and in the power supply
Node generates the preset bus current；
Wherein the condenser type power conversion unit is with condenser type power supply conversion regime, and from the supply node, it is preset total to convert this
Line current and generate a preset constant charge current in the charge node, to be coupled to a battery of the charge node into
Row constant current charging, a wherein presupposition multiple of the constant charge current substantially preset bus current, this is default
Multiple is greater than 1；
(2) in a constant-voltage mode, which is connected a DC input voitage extremely from the coffret pin
The supply node and generate default first bus voltage or the wireless power source cell translation this be wirelessly input to voltage and in the confession
Electrical nodes generate default first bus voltage；
Wherein the switched-mode power supply converting unit is with switched-mode power supply conversion regime, from the supply node, converts this and presets first
Bus voltage and in the charge node generate a preset charging voltage, to the battery carry out constant voltage charging；
(3) in a tiny drop current-mode, which is connected the DC input voitage extremely from the coffret pin
The supply node and generate default first bus voltage or the wireless power source cell translation this be wirelessly input to voltage and in the confession
Electrical nodes generate default first bus voltage；
Wherein the switched-mode power supply converting unit is with switched-mode power supply conversion regime, from the supply node, converts this and presets first
Bus voltage and in the charge node generate a preset tiny drop charging current, to the battery carry out the charging of tiny drop electric current；
(4) in the first external output mode, the switched-mode power supply converting unit is with switched-mode power supply conversion regime, from the charging
Node converts the voltage of the battery and generates default second bus voltage in the supply node；
Wherein default second bus voltage is connected to the coffret pin from the supply node to produce in the DC switch circuit
A raw external output voltage；
(5) in the second external output mode, the condenser type power conversion unit is with condenser type power supply conversion regime, from the charging
Node converts the voltage of the battery and generates default second bus voltage in the supply node；And the DC switch circuit certainly should
Supply node converts default second bus voltage and generates the external output voltage in the coffret pin, wherein this second
One predeterminated voltage multiple of the voltage of the bus voltage substantially battery, the predeterminated voltage multiple are greater than 1；And
(6) in the external output mode of third, the wireless power source cell translation this be wirelessly input to voltage and produced in the supply node
Raw default second bus voltage；And the DC switch circuit from the supply node convert default second bus voltage and in this
Coffret pin generates the external output voltage.
2. charging unit as described in claim 1, wherein a power supply transmission unit converts an input power, and via the biography
Defeated interface pin generates the direct current input current or the DC input voitage, and the power supply transmission unit adjusts direct current input electricity
It is flow to a preset input current level, or adjusts the DC input voitage to a preset input voltage level, in the confession
Electrical nodes are corresponding to generate the preset bus current or default first bus voltage.
3. charging unit as described in claim 1, wherein further include a direct current ON-OFF control circuit, to control the direct current
Switching circuit, wherein the dc switch control circuit also in the DC input voitage of the coffret pin be more than one excessively high
When voltage threshold, controlling the DC switch circuit is to be not turned on, to protect the circuit for being coupled to the supply node.
4. charging unit as described in claim 1, wherein the DC switch circuit includes that the first dc switch and second are straight
Stream switch, the wherein body diode of the body diode of first dc switch and second dc switch reversed coupling each other
It connects, to block the one of body diode of first dc switch or second dc switch parasitic ontology electric current.
5. charging unit as described in claim 1, wherein the wireless power source unit includes:
One rectification circuit is coupled to the wireless receiving coil, generates electricity after a rectification this is wirelessly input to voltage commutation
Pressure；
An at least wireless power source conversioning transistor, is coupled between the rectified voltage and the supply node；And
One wireless charging control circuit, to control the wireless power source conversioning transistor, to convert the rectified voltage, and in this
Supply node generates default first bus voltage or the preset bus current.
6. charging unit as described in claim 1, wherein the condenser type power conversion unit further includes conversion and control electricity
Road, to control multiple change-over switch, wherein the conversion control circuit is in multiple switch periods, and multiple turn of respective operations
Switch is changed, making an at least changeover condenser, periodically correspondence is coupled to an at least Charge Proportional voltage node, the power supply section
Between point and a grounding point a pair of of node therein, to convert default first bus voltage from the supply node in this
Charge node generates the preset constant charge current or the preset charging voltage, or converts the battery from the charge node
Voltage and generate default second bus voltage in the supply node；Wherein the charge node is coupled to an at least Charge Proportional
A node in voltage node.
7. charging unit as claimed in claim 6, wherein an at least changeover condenser includes first and second conversion capacitor
Device, multiple switch period include first and second switch period；Wherein the conversion control circuit controls multiple change-over switch,
The first end of first changeover condenser is set to respectively correspond switching in first switch period and second switch period and electric
Gas is connected between the supply node and the charge node, and makes the second end of first changeover condenser when first conversion
Respectively correspond switching in section and second switch period and be electrically connected between the charge node and the grounding point, and make this
The first end of two changeover condensers respectively corresponds in second switch period and first switch period switching and is electrically connected
Between the supply node and the charge node, and makes the second end of second changeover condenser in second switch period and be somebody's turn to do
Switching is respectively corresponded in first switch period and is electrically connected between the charge node and the grounding point, so that the constant charging
2 times of the electric current substantially preset bus current, or make the second bus voltage substantially battery voltage 2
Times.
8. charging unit as described in claim 1, wherein
The inductance coupling is between a switching node and the charge node；
At least a suitching type transfer switch includes: for this
One switch on the bridge is coupled between the supply node and the switching node；And
One bridge switch is coupled between the switching node and a grounding point；
The switched-mode power supply converting unit further includes a control switching circuit, to control the switch on the bridge and the bridge switch,
With the switched-mode power supply conversion regime of buck, boost type or step-down/up type, the preset charging electricity is generated in the charge node
Pressure or the preset tiny drop charging current, or default second bus is generated in the supply node with switched-mode power supply conversion regime
Voltage.
9. charging unit as described in claim 1, wherein further include an electric power loop transistor, coupled in series is in the inductance
Between the charge node, wherein the first end of the electric power loop transistor and the inductance are directly connected in one by electrical nodes,
Second end is directly connected in the charge node；Wherein a circuit system using this by the system voltage on electrical nodes as power supply.
10. charging unit as claimed in claim 9, wherein the electric power loop transistor controls system voltage and the battery
Voltage difference so that the system voltage be not less than a preset system voltage threshold value.
11. charging unit as claimed in claim 9, wherein the electric power loop transistor controls system voltage and the battery
Voltage difference, the battery is filled with generating the preset charging voltage or the preset tiny drop charging current in the charge node
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/006,633 US10523032B2 (en) | 2017-06-22 | 2018-06-12 | Charging apparatus with multiple power paths |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201762523630P | 2017-06-22 | 2017-06-22 | |
| US62/523,630 | 2017-06-22 |
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| CN109120024B CN109120024B (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810521752.0A Active CN109120024B (en) | 2017-06-22 | 2018-05-28 | Charging device with multiple power supply paths |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI712255B (en) * | 2019-06-12 | 2020-12-01 | 英屬維京群島商鯨鏈先進股份有限公司 | Series power supply system |
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