CN104659924A - Power management unit, and device and method of wireless power supply unit thereof - Google Patents
Power management unit, and device and method of wireless power supply unit thereof Download PDFInfo
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- CN104659924A CN104659924A CN201310580808.7A CN201310580808A CN104659924A CN 104659924 A CN104659924 A CN 104659924A CN 201310580808 A CN201310580808 A CN 201310580808A CN 104659924 A CN104659924 A CN 104659924A
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Abstract
The invention relates to a power management unit which is applied to a device of a wireless power supply unit and used for switching input power and providing a stable rated voltage or a variable-flow current. The power management unit comprises a rectifying unit, a voltage stabilizing unit, and a control unit. The rectifying unit is used for converting alternating current into direct current. The voltage stabilizing unit is connected to the rectifying unit and used for providing a stable rated voltage or a variable-flow current. The control unit is connected to the voltage stabilizing unit and used for controlling the input power of the voltage stabilizing unit. In addition, a device and a method of a wireless power supply unit are disclosed.
Description
[technical field]
The invention relates to a power signal processing platform, especially manage about radio source.
[background technology]
Wireless charging, also known as doing induction charging, non-contact inductive charging, is utilize near field to respond to, namely inductance coupling high, transmitted its energy to the device of electricity consumption by power supply unit (charger), this device uses the energy received to charge to battery, and simultaneously for itself running.Owing to transmitting energy with inductance coupling high between charger and power device, connect without electric wire between the two, the device of therefore charger and electricity consumption can be accomplished to expose without conductive junction point.
Owing to designing without conductive junction point, wireless charging technology can avoid the danger of getting an electric shock.And electric power transfer assembly is without exposing, therefore can not by erosions such as the moisture content in air, oxygen; In addition, due to contactless existence, therefore do not have the loss of making in connection and mechanical wear when being separated and arcing etc. yet.
Contributive especially, make medical implant apparatus safer.On the embedded medical treatment device of implantation, not damaging in systemic situation, the medical treatment device be implanted in human body can be charged, and without the need for electric wire through skin and other autologous tissue, remove the risk of infection from.
And it should be noted that the convenience that wireless charging brings most.Without the need to connecting with electric wire during charging, as long as be put near charger.Technically, a charger can enter electricity to multiple power device, the trouble can saved multiple charger when there being multiple power device, need not take multiple supply socket, not have many electric wires to be wound around mutually.
Traditional wireless charging (power supply) framework, comprise two charge paths, the first utilizes wireless power to charge, and is then in addition to be charged by corded power.Wherein wireless power charge path, by an electronic circuit, wireless power reception come, through the process of over commutation and voltage stabilizing, after converting direct current to.Then, outside at electronic circuit, by a charhing unit (linear charger or switch charger), this direct current is converted to the rated voltage of a corresponding load, uses for load.And corded power charge path, be then corded power is connected directly to charhing unit, and this corded power be converted to the rated voltage of a corresponding load, use for load.
Thereafter, for enabling electronic circuit wherein directly charge to battery, just a linear charger (or switch charger) is set directly at electronic circuit inside.Thus, on wireless charging path, except improving the integrality of electronic circuit, also save an external charging unit, to reduce costs.Just on wired charge path, still need an external charging unit.
In above two kinds of conventional methods, all need an extra charhing unit, but this extra charhing unit increasing except making cost, also making the area of pcb board (printed circuit board (PCB)) increase.Therefore, in cost consideration, amendatory space is still had.
[summary of the invention]
Because the problems referred to above, the invention provides the apparatus and method of a Power Management Unit and application one wireless power unit thereof, in order to solve the circuit form of the higher cost of known techniques.By by external charging unit, be arranged on a Power Management Unit inner, to improve the integrality of Power Management Unit, and reduce design cost.
At least one specific embodiment of the present invention discloses a Power Management Unit, is the device being applied in a wireless power unit, in order to switch input electric power, and provides one to stablize rated voltage.Described Power Management Unit comprises a rectification unit, a voltage regulation unit and a control unit.Rectification unit is in order to convert alternating current to direct current.Voltage regulation unit is connected to rectification unit, in order to provide one to stablize rated voltage, or a changeable flow electric current.Control unit is connected to voltage regulation unit, in order to control the input electric power of voltage regulation unit.
At least another specific embodiment of the present invention discloses a kind of device of wireless power unit, and the device of described wireless power unit comprises a secondary coil, a switch unit and a Power Management Unit.Secondary coil, in order to receive ac magnetic field, and produces alternating current.Switch unit, in order to switch input electric power, wherein input electric power comprises corded power, and wireless power.Power Management Unit, controls switch unit, switches input electric power, and provides one to stablize rated voltage or changeable flow electric current.Wherein Power Management Unit more comprises a rectification unit, is connected to secondary coil, in order to convert alternating current to direct current; One voltage regulation unit, is connected to rectification unit and switch unit simultaneously, stablizes rated voltage or a changeable flow electric current in order to receive electric power and to change this electric power to provide one; And a control unit, be connected to rectification unit, switch unit and voltage regulation unit, in order to control the input electric power of voltage regulation unit simultaneously.
Effect of the present invention is, charhing unit is arranged on Power Management Unit inside, makes directly to power to give load device.In addition, Power Management Unit also provides the function of a changeable supply path, and meaning and corded power path and wireless power path are all connected to Power Management Unit, afterwards by Power Management Unit, select supply path, and directly load device is given in power supply.Thus, all external charging unit can just be saved, to reduce design cost.
If the present invention is as battery charger, due to this injection of electronic product, the battery that individual uses, usually not only a kind of, therefore, the invention is not restricted to, once only to a load device charging, can once charge to multi-load device.In addition, it is noted that the invention is not restricted to battery charging, the load device needing to accept power supply can be also used in.
For this reason, the invention provides a kind of Power Management Unit, be applied in the device of a wireless power unit, described Power Management Unit comprises: a rectification unit, in order to convert an alternating current to a direct current; One voltage regulation unit, is connected to described rectification unit, in order to provide one to stablize rated voltage, or a changeable flow electric current; And a control unit, be connected to described voltage regulation unit, in order to control an input electric power of described voltage regulation unit.
Again, the invention provides a kind of device of wireless power unit, comprise: a secondary coil, in order to receive an ac magnetic field, and produce an alternating current; One switch unit, in order to switch an input electric power, wherein input electric power comprises the combination of a corded power, a wireless power or a corded power and a radio-circuit; And a Power Management Unit, control described switch unit, to switch described input electric power, and provide one to stablize rated voltage or a changeable flow electric current, described Power Management Unit more comprises: a rectification unit, is connected to described secondary coil, in order to convert alternating current to a direct current; One voltage regulation unit, is connected to described rectification unit and described switch unit simultaneously, in order to receive described input electric power, and changes input electric power to provide described in described stable rated voltage or changeable flow electric current; And a control unit, be connected to described rectification unit, described switch unit and described voltage regulation unit, in order to control the input electric power of voltage regulation unit simultaneously.
Again, the invention provides a kind of method of wireless power unit, comprise: utilize a secondary coil, receive an ac magnetic field, produce an alternating current simultaneously; Utilize a Power Management Unit, convert the alternating current that described secondary coil produces to a direct current, and supply one and stablize rated voltage or a changeable flow electric current, described Power Management Unit more comprises: by a rectification unit, by the alternating current that described secondary coil produces, be converted to direct current, and promote a voltage regulation unit with this direct current, and by described voltage regulation unit, produce one and stablize rated voltage or a changeable flow electric current, in addition, by a control unit, confirming the voltage promoting described voltage regulation unit, is a corded power or a wireless power; And utilize a switch unit, described Power Management Unit is done between described corded power and described wireless power and switches.
In an embodiment of the present invention, described Power Management Unit is the chipset of semiconductor processing procedure.
In an embodiment of the present invention, described stable rated voltage or described changeable flow electric current can adjust its size person on demand.
In an embodiment of the present invention, described input electric power comprises the combination of a corded power, a wireless power or a corded power and a radio-circuit.
In an embodiment of the present invention, more comprise one first filter capacitor, be connected to described rectification unit and described voltage regulation unit simultaneously.
In an embodiment of the present invention, more comprise one second filter capacitor, be connected to described voltage regulation unit.
In an embodiment of the present invention, more comprise a cable power Port, be connected to described switch unit, also can be connected to an external power source, and transmit described corded power.
In an embodiment of the present invention, described secondary coil can be the coil of geometry.
In an embodiment of the present invention, more comprise a load device, be connected to described voltage regulation unit, described voltage regulation unit directly can be powered and be given described load device.
In an embodiment of the present invention, described control unit is by described switch unit, and switching described input electric power is corded power or wireless power.
In an embodiment of the present invention, more comprise the voltage regulation unit of described Power Management Unit inside, the stable rated voltage produced or changeable flow electric current can directly supply should a load device.
In an embodiment of the present invention, more comprise and utilize a cable power Port, be connected to an external power source, give voltage regulation unit to provide an electric power.
In an embodiment of the present invention, the wireless power promoting described voltage regulation unit is provided by an external communication electromagnetic field, and corded power is provided by an external power source.
[accompanying drawing explanation]
Fig. 1 is in first and second embodiment of the present invention, the device schematic diagram of a Power Management Unit and application one wireless power unit thereof.
Fig. 2 is in third embodiment of the invention, the method schematic diagram of a wireless power unit.
Fig. 3 is in fourth embodiment of the invention, the method schematic diagram of a wireless power unit.
[primary clustering symbol description]: 112 secondary coils
100 electric supply installation 120 Power Management Unit
110 primary winding 122 rectification units
124 voltage regulation unit 150 switch units
126 control unit 160 load devices
130 first filter capacitor 170 cable power Ports
140 second filter capacitors
[embodiment]
The first embodiment of the present invention, a Power Management Unit, refers to the part shown in Fig. 1, and this Power Management Unit 120 comprises rectification unit 122, voltage regulation unit 124 and a control unit 126.
As shown in Figure 1, Power Management Unit 120 can be made with any one electronic circuit form, can also be one by the chipset of manufacture of semiconductor, in this embodiment, for one by the chipset of manufacture of semiconductor.
This Power Management Unit 120 inside comprises a rectification unit 122, rectification unit is by being respectively AC1 and AC2 with the chip pin position of external communication between Power Management Unit, as shown in the figure, user passes through these two pin positions in outside, alternating current transmission is entered the rectification unit of Power Management Unit inside, the alternating current of reception is converted to direct current by rectification unit simultaneously.Alternating current is wherein by the secondary coil 112 of outside, receives alternating electromagnetic place and produces, therefore this input electric power is called wireless power.
Rectification unit is connected with a voltage regulation unit 124 again, and the direct current therefore after conversion, namely in order to promote voltage regulation unit.Described voltage regulation unit 124, simultaneously and the output port of rectification unit 122, and a control unit 126 is connected for its input port, and this tie point is RECT by the chip pin position of Power Management Unit and external communication, as shown in the figure.
But promote the electric power of this voltage regulation unit, and can by two different paths, one of them wireless power for providing above by ac magnetic field, is received by secondary coil and is converted to alternating current, then the direct current by producing after rectification unit conversion; Another kind of then be by the direct current that transmitted by chip pin position RECT of Power Management Unit outside, this direct current provides by USB port (USB), or provided by alternating current transformer, but be not limited thereto a little power supply source this direct current is provided.Herein and this input electric power is called corded power.
In addition, a control unit 126, in order to confirm when System Operation, is the direct current promotion voltage regulation unit 124 exported by rectification unit 122, or by the wired input electric power transmitted by chip pin position RECT, promotes voltage regulation unit 124.
Wherein control unit confirms that the mode of input electric power has several, illustrates, but be not limited to these methods at this.Such as by artificial mode, give an order to control unit, control unit is known definitely, and by the electric power inputing to voltage regulation unit be corded power or wireless power.Again such as, refer to shown in Fig. 1, control unit Auto-Sensing cable power Port 170 can be made, whether there is a magnitude of voltage, if so, then represent that cable power Port 170 is connected to an external power source, then control unit then can confirm that by the electric power inputing to voltage regulation unit be corded power; If there is not a magnitude of voltage in the first connectivity port 170 of wired electricity, a voltage difference whether is there is between chip pin position AC1 and AC2 that then detecting and secondary coil 112 are connected, if, then represent that secondary coil 112 receives an ac magnetic field, and can the ac magnetic field received be converted to alternating current, then control unit can confirm that by the electric power inputing to voltage regulation unit be wireless power.
And after voltage regulation unit 124 promotes by direct current, voltage regulation unit can by this direct current, and converting one to stablizes rated voltage, by the chip pin position OUT of Power Management Unit and external communication, export this voltage to Power Management Unit outside.Load voltage value wherein, can user demand and have different settings, such as set load voltage value be 5V ± 0.5V; Or voltage regulation unit also by this direct current, can convert a changeable flow electric current to, equally by the chip pin position OUT of Power Management Unit and external communication, export this electric current to Power Management Unit outside.
And the stable rated voltage of this Power Management Unit output or changeable flow electric current, load can be allowed directly to use, and such as, to load charging, load can be such as a lithium battery.
The second embodiment of the present invention is, the application of above-mentioned Power Management Unit, one wireless power unit, refer to shown in Fig. 1, this wireless power unit comprises electric supply installation 100, primary winding 110, secondary coil 112, Power Management Unit 120,1 first filter capacitor 130,1 second filter capacitor 140, switch unit 150, load device 160 and a cable power Port 170, and wherein Power Management Unit inside more comprises rectification unit 122, voltage regulation unit 124 and a control unit 126.
As shown in Figure 1, an electric supply installation 100, supplies an alternating current, and this electric supply installation may be, but not limited to, general socket, or generally commercially available AC power supply etc.
The alternating current that electric supply installation 100 provides, is received by a primary winding 110, and by this primary winding, produces an ac magnetic field.This coil can be made by a single metal line, and metal wire can be any metal material, thickness, and around number of turn number etc., such as with a flat copper wire loop around 2400 circles.
The ac magnetic field that primary winding 110 produces, is received by a secondary coil 112, and converts thereof into alternating current.This coil can be made by a single metal line, and metal wire can be any metal material, thickness, and around number of turn number etc., such as with a flat copper wire loop around 240 circles.
The alternating current that secondary coil produces, by chip pin position AC1 and AC2 of Power Management Unit 120, directly transmits the rectification unit 122 entering Power Management Unit inside, as shown in the figure.The alternating current received is converted to direct current by rectification unit simultaneously.
Rectification unit is connected with a voltage regulation unit 124 again, and the direct current therefore after conversion, will in order to promote voltage regulation unit, and this input electric power, be called wireless power.In addition, described voltage regulation unit 124, simultaneously and the output port of rectification unit 122, and a control unit 126 is connected for its input port, and this tie point is RECT by the chip pin position of Power Management Unit and external communication, as shown in the figure.
But promote the electric power of this voltage regulation unit, and can by two different paths, one of them wireless power for providing above by ac magnetic field, is received by secondary coil and is converted to alternating current, then the direct current by producing after rectification unit conversion; Another kind of then be by the direct current that transmitted by chip pin position RECT of Power Management Unit outside, this direct current provides by USB port (USB), or provided by alternating current transformer, but be not limited thereto a little power supply source this direct current is provided.Herein and this input electric power is called corded power.
In addition, a control unit 126, in order to confirm when System Operation, is the direct current promotion voltage regulation unit 124 exported by rectification unit 122, or by the wired input electric power transmitted by chip pin position RECT, promotes voltage regulation unit 124.This control unit and being connected with the chip pin position RECT of a switch unit 150 by Power Management Unit, is done by switch unit and switches between corded power and wireless power.
Wherein control unit confirms that the mode of input electric power has several, illustrates, but be not limited to these methods at this.Such as by artificial mode, give an order to control unit, control unit is known definitely, and by the electric power inputing to voltage regulation unit be corded power or wireless power.Again such as, refer to shown in Fig. 1, control unit Auto-Sensing cable power Port 170 can be made, whether there is a magnitude of voltage, if so, then represent that cable power Port 170 is connected to an external power source, then control unit then can confirm that by the electric power inputing to voltage regulation unit be corded power; If there is not a magnitude of voltage in the first connectivity port 170 of wired electricity, a voltage difference whether is there is between chip pin position AC1 and AC2 that then detecting and secondary coil 112 are connected, if, then represent that secondary coil 112 receives an ac magnetic field, and can the ac magnetic field received be converted to alternating current, then control unit can confirm that by the electric power inputing to voltage regulation unit be wireless power.
And after voltage regulation unit 124 promotes by direct current, voltage regulation unit can by this direct current, and converting one to stablizes rated voltage, by the chip pin position OUT of Power Management Unit and external communication, export this voltage to Power Management Unit outside.Load voltage value wherein, can have different settings according to the demand of user, such as setting load voltage value is 5V ± 0.5V; Or voltage regulation unit also by this direct current, can convert a changeable flow electric current to, equally by the chip pin position OUT of Power Management Unit and external communication, export this electric current to Power Management Unit outside.
One load device 160 is by the chip pin position OUT of Power Management Unit, be connected with voltage regulation unit, the output voltage of voltage regulation unit or electric current, directly can supply this load device and use, such as to load device charging, and this load device can be such as but be not limited to a lithium battery.
Have one first filter capacitor 130 in addition, by the chip pin position RECT of Power Management Unit, be connected with the rectification unit of Power Management Unit inside, the rated voltage produced in order to make rectification unit is more stable, level and smooth, to promote the efficiency of voltage regulation unit.The first filter capacitor wherein, in general, bulky capacitor is used for stablizing and exports, and make output smoothing, small capacitances can be used to filtering High-frequency Interference, makes output voltage pure.Therefore the size of electric capacity, can adjust according to different demand.
More there is one second filter capacitor 140, by the chip pin position OUT of Power Management Unit, be connected with the voltage regulation unit of Power Management Unit inside, the rated voltage produced in order to make voltage regulation unit is more stable, level and smooth, to promote the efficiency of voltage regulation unit to load supplying.The second filter capacitor wherein, in general, bulky capacitor is used for stablizing and exports, and make output smoothing, small capacitances can be used to filtering High-frequency Interference, makes output voltage pure.Therefore the size of electric capacity, can adjust according to different demand.
The third embodiment of the present invention, the method schematic diagram of a wireless power unit, refers to shown in Fig. 2.As shown in the figure, step S200 is comprised to step S235.First the control unit performing the Power Management Unit inside of step S200 utilizes a switch unit, switches the voltage regulation unit inputing to Power Management Unit inside with corded power or wireless power.One Power Management Unit inside comprises a control unit and a voltage regulation unit, control unit is connected with voltage regulation unit and switch unit simultaneously, when the electric power that control unit confirms to input to voltage regulation unit is corded power, a switch unit is then utilized to switch to corded power, when the electric power inputing to voltage regulation unit if confirm is wireless power, then a switch unit is utilized to switch to wireless power.
Wherein control unit confirms that the mode of input electric power has several, illustrates, but be not limited to these methods at this.Such as by artificial mode, give an order to control unit, control unit is known definitely, and by the electric power inputing to voltage regulation unit be corded power or wireless power.Again such as, refer to shown in Fig. 1, control unit Auto-Sensing cable power Port 170 can be made, whether there is a magnitude of voltage, if so, then represent that cable power Port 170 is connected to an external power source, then control unit then can confirm that by the electric power inputing to voltage regulation unit be corded power; If there is not a magnitude of voltage in the first connectivity port 170 of wired electricity, a voltage difference whether is there is between chip pin position AC1 and AC2 that then detecting and secondary coil 112 are connected, if, then represent that secondary coil 112 receives an ac magnetic field, and can the ac magnetic field received be converted to alternating current, then control unit can confirm that by the electric power inputing to voltage regulation unit be wireless power.
In step S200, if control unit makes switch unit switch to wireless power, simultaneously, the ac magnetic field received is converted to alternating current (step S205) by secondary coil.Refer to Fig. 1, an electric supply installation 100, be connected with a primary winding 110, electric supply installation provides primary winding alternating current, by primary winding, alternating current is converted to ac magnetic field, therefore when secondary coil receives this ac magnetic field, just can be converted into alternating current.Electric supply installation wherein, may be, but not limited to, general power supply unit or socket.
The alternating current of secondary coil conversion, transfers to the rectification unit (step S210) of Power Management Unit inside.Secondary coil is connected with the rectification unit of Power Management Unit inside, therefore ac magnetic field changed by secondary coil after alternating current, directly transmission enters the rectification unit of Power Management Unit inside.
Then, utilize after rectification unit converts the alternating current received to direct current (step S215), the DC power transmission provided by rectification unit is to voltage regulation unit (step S220).Rectification unit is connected with voltage regulation unit, therefore after rectification unit converts the alternating current received to direct current, just direct by this DC power transmission to voltage regulation unit, to promote voltage regulation unit.
In step S225, the direct current that voltage regulation unit will receive, is converted to one and stablizes rated voltage or changeable flow electric current.Utilize voltage regulation unit can make voltage not by input electric power, or load effect, and maintain stable output.In addition, also can according to user or loading demand, export a rated voltage, the such as voltage of specified 5V (volt), or export the electric current of a changeable flow, within such as initial 15 minutes, export the electric current of a 100mA (milliampere), within afterwards 15 minutes, export the electric current between 20mA to 100mA.
Next, voltage regulation unit by conversion voltage or current delivery to load (step S230).Voltage regulation unit is connected with load, and wherein load can be such as general lithium battery.
In addition, if in step s 200, control unit makes switch unit switch to corded power, simultaneously, utilizes a cable power Port, by electric power transfer to the voltage regulation unit (step S235) of Power Management Unit inside.Refer to Fig. 1, an external power source, be connected to a cable power Port 170, and by this cable power Port, by the DC power transmission that provides to the voltage regulation unit of Power Management Unit inside.External power source wherein, may be, but not limited to, and one provides galvanic server by USB (USB), or one supplies galvanic socket by transformer.
Then perform step S225, the direct current that voltage regulation unit will receive, is converted to one and stablizes rated voltage or changeable flow electric current.Voltage regulation unit is utilized to make voltage not by input electric power, or load effect, and maintain stable output.In addition, also can according to user or loading demand, export a rated voltage, the such as voltage of specified 5V (volt), or export the electric current of a changeable flow, within such as initial 15 minutes, export the electric current of a 100mA (milliampere), within afterwards 15 minutes, export the electric current between 20mA to 100mA.
Subsequently, voltage regulation unit by conversion voltage or current delivery to load (step S230).Voltage regulation unit is connected with load, and in order to directly providing voltage or electric current to give load, such as, to load charging, wherein load can be such as general lithium battery.
The fourth embodiment of the present invention, the method schematic diagram of a wireless power unit, refers to shown in Fig. 3.
As shown in the figure, the initial step of the present embodiment is same as the step S200 shown in Fig. 2 to step S215.Therefore step S200 is first performed to step S215, difference is, after execution step S215, utilize one first filter capacitor, the direct current that rectification unit is provided more stable level and smooth (step S300), simultaneously, the DC power transmission provided by rectification unit is to voltage regulation unit (step S305).Rectification unit is connected with voltage regulation unit, therefore after rectification unit converts the alternating current received to direct current, just can by this DC power transmission to voltage regulation unit, and to promote voltage regulation unit.Wherein the first filter capacitor is connected with rectification unit and voltage regulation unit simultaneously, in order to the direct current making rectification unit provide voltage regulation unit, more stable level and smooth.In general, bulky capacitor is used for stablizing and exports, and make output smoothing, small capacitances can be used to filtering High-frequency Interference, makes output voltage pure.Therefore the size of electric capacity, can adjust according to different demand.
In step S315, the direct current that voltage regulation unit will receive, is converted to one on demand and stablizes rated voltage or changeable flow electric current.Voltage regulation unit is utilized to make voltage not by input electric power, or load effect, and maintain stable output.In addition, also can according to user or loading demand, export a rated voltage, the such as voltage of specified 5V (volt), or export the electric current of a changeable flow, within such as initial 15 minutes, export the electric current of a 100mA (milliampere), within afterwards 15 minutes, export the electric current between 20mA to 100mA.
Next, utilize one second filter capacitor, the rated voltage that voltage regulation unit is provided or changeable flow electric current more stable level and smooth (step S320).Wherein the second filter capacitor is connected with voltage regulation unit, the stable rated voltage provided in order to make voltage regulation unit or changeable flow electric current more stable level and smooth.In general, bulky capacitor is used for stablizing and exports, and make output smoothing, small capacitances can be used to filtering High-frequency Interference, makes output voltage pure.Therefore the size of electric capacity, can adjust according to different demand.
And in step S325, voltage regulation unit by conversion voltage or current delivery to load.Voltage regulation unit is connected with load, and in order to directly providing voltage or electric current to give load, wherein load can be such as general lithium battery.
In addition, if in step S200, control unit makes switch unit switch to corded power, simultaneously, utilizes a cable power Port, by electric power transfer to the voltage regulation unit (step S310) of Power Management Unit inside.Refer to Fig. 1, an external power source, be connected to a cable power Port 170, and by this cable power Port, by the DC power transmission that provides to the voltage regulation unit of Power Management Unit inside.External power source wherein, may be, but not limited to, and one provides galvanic server by USB (USB), or one supplies galvanic socket by transformer.
Then perform step S315, the direct current that voltage regulation unit will receive, is converted to one on demand and stablizes rated voltage or changeable flow electric current.Voltage regulation unit is utilized to make voltage not by input electric power, or load effect, and maintain stable output.In addition, also can according to user or loading demand, export a rated voltage, the such as voltage of specified 5V (volt), or export the electric current of a changeable flow, within such as initial 15 minutes, export the electric current of a 100mA (milliampere), within afterwards 15 minutes, export the electric current between 20mA to 100mA.
Next, utilize one second filter capacitor, the rated voltage that voltage regulation unit is provided or changeable flow electric current more stable level and smooth (step S320).Wherein the second filter capacitor is connected with voltage regulation unit, the stable rated voltage provided in order to make voltage regulation unit or changeable flow electric current more stable level and smooth.In general, bulky capacitor is used for stablizing and exports, and make output smoothing, small capacitances can be used to filtering High-frequency Interference, makes output voltage pure.Therefore the size of electric capacity, can adjust according to different demand.
Subsequently, voltage regulation unit by conversion voltage or current delivery to load (step S325).Voltage regulation unit is connected with load, and in order to directly providing voltage or electric current to give load, such as, to load charging, wherein load can be such as general lithium battery.
Can be learnt by above embodiment, especially as shown in Figure 1, the voltage regulation unit of Power Management Unit inside, provides the function of the electric power of a changeable supply Power Management Unit, and meaning and corded power and wireless power are all connected to Power Management Unit, by Power Management Unit itself, after confirming supply electric power, make switch unit switch to supply electric power, receive this electric power thereafter, and after being changed by this electric power, directly power supply gives load device.Thus, all external charging unit can just be saved, to reduce design cost.In addition, it is noted that the invention is not restricted to battery charging, the load device needing to accept power supply can be also used in.
Claims (19)
1. a Power Management Unit, be applied in the device of a wireless power unit, described Power Management Unit comprises:
One rectification unit, in order to convert an alternating current to a direct current;
One voltage regulation unit, is connected to described rectification unit, in order to provide one to stablize rated voltage, or a changeable flow electric current; And
One control unit, is connected to described voltage regulation unit, in order to control an input electric power of described voltage regulation unit.
2. the Power Management Unit as described in claims 1, is characterized in that, described Power Management Unit is the chipset of semiconductor processing procedure.
3. the Power Management Unit as described in claims 1, is characterized in that, described stable rated voltage or described changeable flow electric current can adjust its size person on demand.
4. the Power Management Unit as described in claims 1, is characterized in that, described input electric power comprises the combination of a corded power, a wireless power or a corded power and a wireless power.
5. a device for wireless power unit, comprises:
One secondary coil, in order to receive an ac magnetic field, and produces an alternating current;
One switch unit, in order to switch an input electric power, described input electric power comprises the combination of a corded power, a wireless power or a corded power and a wireless power; And
One Power Management Unit, controls described switch unit, and to switch described input electric power, and provide one to stablize rated voltage or a changeable flow electric current, described Power Management Unit more comprises:
One rectification unit, is connected to described secondary coil, in order to convert described alternating current to a direct current;
One voltage regulation unit, is connected to described rectification unit and described switch unit simultaneously, in order to receive described input electric power, and changes described input electric power to provide described in described stable rated voltage or changeable flow electric current; And
One control unit, is connected to described rectification unit, described switch unit and described voltage regulation unit simultaneously, in order to control the described input electric power of described voltage regulation unit.
6. the device of the wireless power unit as described in claims 5, is characterized in that, described Power Management Unit is the chipset of semiconductor processing procedure.
7. the device of the wireless power unit as described in claims 5, is characterized in that, described stable rated voltage or described changeable flow electric current can adjust its size person on demand.
8. the device of the wireless power unit as described in claims 5, is characterized in that, more comprises one first filter capacitor, is connected to described rectification unit and described voltage regulation unit simultaneously.
9. the device of the wireless power unit as described in claims 5, is characterized in that, more comprises one second filter capacitor, is connected to described voltage regulation unit.
10. the device of the wireless power unit as described in claims 5, is characterized in that, more comprises a cable power Port, is connected to described switch unit, be also connected to an external power source, and transmit described corded power.
The device of 11. wireless power unit as described in claims 5, it is characterized in that, described secondary coil is the coil of geometry.
The device of 12. wireless power unit as described in claims 5, it is characterized in that, more comprise a load device, be connected to described voltage regulation unit, described voltage regulation unit directly can be powered and be given described load device.
The method of 13. 1 kinds of wireless power unit, comprises:
Utilize a secondary coil, receive an ac magnetic field, produce an alternating current simultaneously;
Utilize a Power Management Unit, the described alternating current produced by described secondary coil converts a direct current to, and supply one and stablize rated voltage or a changeable flow electric current, described Power Management Unit more comprises: by a rectification unit, the described alternating current that described secondary coil is produced, be converted to described direct current, and promote a voltage regulation unit with described direct current, and by described voltage regulation unit, produce described stable rated voltage or described changeable flow electric current, in addition, by a control unit, confirm the voltage promoting described voltage regulation unit, be a corded power or a wireless power, and
Utilize a switch unit, described Power Management Unit is done between described corded power and described wireless power and switches.
The method of 14. wireless power unit as described in claims 13, is characterized in that, described control unit is by described switch unit, and switching described input electric power is described corded power or described wireless power.
The method of 15. wireless power unit as described in claims 13, is characterized in that, more comprise the described voltage regulation unit of described Power Management Unit inside, and the described stable rated voltage produced or described changeable flow electric current can directly for should load devices.
The method of 16. wireless power unit as described in claims 13, it is characterized in that, more comprise by one first filter capacitor, described first filter capacitor is connected to described rectification unit and described voltage regulation unit simultaneously, and the described direct current that described rectification unit is changed is more stable, level and smooth.
The method of 17. wireless power unit as described in claims 13, it is characterized in that, more comprise by one second filter capacitor, described second filter capacitor is connected to described voltage regulation unit, and the described stable rated voltage that described voltage regulation unit is provided is more stable, level and smooth.
The method of 18. wireless power unit as described in claims 13, is characterized in that, more comprise and utilize a cable power Port, be connected to an external power source, give described voltage regulation unit to provide described corded power.
The method of 19. wireless power unit as described in claims 13 or 18, it is characterized in that, the described wireless power promoting described voltage regulation unit is provided by described external communication electromagnetic field, and described corded power is provided by external power source described in.
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| CN201310580808.7A CN104659924A (en) | 2013-11-18 | 2013-11-18 | Power management unit, and device and method of wireless power supply unit thereof |
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| CN201310580808.7A CN104659924A (en) | 2013-11-18 | 2013-11-18 | Power management unit, and device and method of wireless power supply unit thereof |
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