CN104167788A - Wireless charging device for charging wireless wearable device through NFC antenna - Google Patents
Wireless charging device for charging wireless wearable device through NFC antenna Download PDFInfo
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- CN104167788A CN104167788A CN201410391631.0A CN201410391631A CN104167788A CN 104167788 A CN104167788 A CN 104167788A CN 201410391631 A CN201410391631 A CN 201410391631A CN 104167788 A CN104167788 A CN 104167788A
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Abstract
The invention discloses a wireless charging device for charging wireless wearable device through an NFC antenna. The wireless charging device comprises an antenna matching module, a wireless charging management module and a filtering module, the NFC antenna, the antenna matching module, the wireless charging management module, the filtering module and an a battery are sequentially connected. According to the wireless charging device, the NFC antenna is used for receiving energy signals, the energy signals received by the NFC antenna are maximized through the antenna matching module, then the wireless charging management module is in communication with a wireless charging transmitting end, conducts commutating and voltage stabilizing on the received wireless electric signals and outputs charging voltage signals, and the filtering module is used for filtering the charging voltage signals output by the wireless charging management module and outputs proper charging voltage. The existing NFC antenna of the wireless wearable device is used for charging, a charging interface or a special antenna does not need to be additionally arranged, the waterproof grade is improved, and the limited space of the wireless wearable device is prevented from being occupied.
Description
Technical field
The present invention relates to electronic product charging technique, particularly a kind of charging device of NFC antenna to wireless wearing equipment charge that utilize.
Background technology
Wireless wearing equipment, as intelligent watch, be wrist-watch built-in intelligence system, carry intelligent mobile phone system be connected in network and realize multi-functional, phone in can synchronous mobile phone, note, mail, photo, music etc.Occurred in the market the intelligent watch of producing with apple, Sony, performance is literary excellence very, can be described as useful supplementing of smart mobile phone.
Although intelligent watch can be carried, can realize the functions such as call, note, mail whenever and wherever possible, provide convenience to user, but also shown as individual character, fashion, extremely young consumption favor all, its charging is a difficult problem.
Although the power consumption of intelligent watch is also little, because it is portable equipment, need be worn on hand, this volume and weight for intelligent watch has also had very large restriction, and battery capacity can not be done greatly, fills at present a TV university approximately available about 1 day.If charging plug is set on the beautiful intelligent watch of fashion, can take the limited space of intelligent watch, affect overall aesthetic feeling.
In addition, there is the wireless wearing equipment of part can realize wireless charging, but need on equipment, increase special antenna, taken the limited space of wireless wearing equipment.Therefore the charging modes of wireless wearing equipment need improvement and bring new ideas.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide the wireless charging device of a kind of NFC of utilization antenna to wireless wearing equipment charge, can utilize NFC antenna reception energy to wireless wearing equipment charge, save the space of wireless wearing equipment.
In order to achieve the above object, the present invention has taked following technical scheme:
Utilize the wireless charging device of NFC antenna to wireless wearing equipment charge, be connected with battery and the NFC antenna of wireless wearing equipment, described NFC antenna, for receiving and dispatching energy signal; Described charging device comprises:
Antenna match module, for maximizing the energy signal that NFC antenna is accepted;
Wireless charging administration module, for carrying out communication by point-to-point with wireless charging transmitting terminal, and carries out rectifying and voltage-stabilizing processing to the radio signal receiving, output charging voltage signal;
Filtration module, for the charging voltage signal of wireless charging administration module output is carried out to filtering processing, makes wireless charging administration module export suitable charging voltage;
The input of described antenna match module connects NFC antenna, and the output of antenna match module is by the input of wireless charging administration module, and the output of described wireless charging administration module connects battery by filtration module.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, and described antenna match module comprises: the first antenna wiring point, the second antenna connection point, series connection matching unit and matching unit in parallel; One end of described series connection matching unit connects the first antenna wiring point, and the other end of series connection matching unit connects wireless charging administration module, also connects the second antenna connection point and wireless charging administration module by matching unit in parallel.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, described series connection matching unit comprises: the first electric capacity, the second electric capacity and the 3rd electric capacity, one end of described the first electric capacity, one end of one end of the second electric capacity and the 3rd electric capacity is all connected the first antenna wiring point, the other end of the first electric capacity, the other end of the other end of the second electric capacity and the 3rd electric capacity is all connected wireless charging administration module, also connect wireless charging administration module and the second antenna connection point by matching unit in parallel, described the first electric capacity, the second electric capacity and the 3rd electric capacity, be used for making resonance frequency consistent with transmitting terminal output frequency, to obtain ceiling capacity signal.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, described matching unit in parallel comprises the 4th electric capacity and the 5th electric capacity, one end of described the 4th electric capacity is all connected the other end of the first electric capacity, the other end of the second electric capacity, the other end and the wireless charging administration module of the 3rd electric capacity with one end of the 5th electric capacity, and the other end of the other end of described the 4th electric capacity and the 5th electric capacity is all connected wireless charging administration module and the second antenna connection point.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, and described wireless charging administration module comprises wireless charging unit, self-powered coupling unit, communication coupling unit, pre-sampling unit, foreign matter detecting unit, output current setting unit, temperature detecting unit, voltage feedback unit and enables unit; Described self-powered coupling unit, communication coupling unit, pre-sampling unit, foreign matter detecting unit, output current setting unit, temperature detecting unit and enable unit and be all connected wireless charging unit, described wireless charging unit is also connected battery by filtration module with voltage feedback unit successively.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, described wireless charging unit comprises wireless charging chip, described self-powered coupling unit comprises the first self-powered coupling capacitance and the second self-powered coupling capacitance, the in the situation that the first self-powered coupling capacitance and the second self-powered coupling capacitance being electric for not having completely at wireless wearing equipment, first obtain electric weight from emitted energy signal and to wireless wearing equipment, it is started, to exercise basic communication/management function; Described communication coupling unit comprises the first communication coupling capacitance and the second communication coupling capacitance, and the first communication coupling capacitance and the second communication coupling capacitance, for sending the modulation /demodulation of communication password and transmitting/receiving system information, complete communication; Described pre-sampling unit comprises the first clamping capacitance and the second clamping capacitance, described foreign matter detecting unit comprises the first resistance, described output current setting unit comprises the second resistance, described temperature detecting unit comprises NTC thermistor, described voltage feedback unit comprises the 3rd resistance and the 4th resistance, described in enable unit and comprise the 5th resistance;
One end of described the first self-powered coupling capacitance connects the BOOT1 end of wireless charging chip, and the other end of the first self-powered coupling capacitance connects two AC1 ends of wireless charging chip, the other end of the first electric capacity, the other end of the second electric capacity, the other end, one end of the 4th electric capacity and one end of the 5th electric capacity of the 3rd electric capacity;
One end of described the second self-powered coupling capacitance connects the BOOT2 end of wireless charging chip, and the other end of the second self-powered coupling capacitance connects two AC2 ends, the other end of the 4th electric capacity and the other ends of the 5th electric capacity of wireless charging chip;
One end of described the first communication coupling capacitance connects the COMM1 end of wireless charging chip, and the other end of the first communication coupling capacitance connects two AC1 ends of wireless charging chip; One end of described the second communication coupling capacitance connects the COMM2 end of wireless charging chip, and the other end of described the second communication coupling capacitance connects two AC2 ends of wireless charging chip;
One end of described the first clamping capacitance connects the CLMP2 end of wireless charging chip, and the other end of the first clamping capacitance connects two AC2 ends of wireless charging chip; One end of described the second clamping capacitance connects the CLMP1 end of wireless charging chip, and the other end of the first clamping capacitance connects two AC1 ends of wireless charging chip and the other end of the first self-powered coupling capacitance;
The FOD end of described wireless charging chip is by the first grounding through resistance, the ILIM end of described wireless charging chip connects FOD end, one end of the 3rd resistance and one end of the 4th resistance of wireless charging chip by the second resistance, the other end of described the 3rd resistance connects filtration module, and the other end of the 4th resistance connects battery;
Four OUT ends of described wireless charging chip are all connected battery by filtration module with two RECT ends, the TS-CTRL end of described wireless charging chip is by NTC thermistor ground connection, the EN1 end of wireless charging chip is by the 5th grounding through resistance, and EN2 end and four PGND of described wireless charging chip hold equal ground connection.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, described wireless charging unit also comprises the 6th resistance and light-emitting diode, described wireless charging chip /CHG end is by the negative pole of the 6th resistance connecting luminous diode, and the positive pole of light-emitting diode connects battery, also connects four OUT ends of wireless charging chip by filtration module.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, and described wireless charging unit also comprises the 7th resistance, and the AD end of described wireless charging chip is by the 7th grounding through resistance.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, described wireless charging unit also comprises the first test point and the second test point, the AD end of described wireless charging chip connects described the first test point, wireless charging chip /AD-EN end connection the second test point.
Described utilizes NFC antenna in the wireless charging device of wireless wearing equipment charge, and described filtration module comprises the first filter capacitor, the second filter capacitor, the 3rd filter capacitor, the 4th filter capacitor, the 5th filter capacitor, the 6th filter capacitor, the 7th filter capacitor and the 8th filter capacitor; Four OUT that one end of one end of described the first filter capacitor and the second filter capacitor is all connected wireless charging chip hold and battery, the equal ground connection of the other end of the other end of the first filter capacitor and the second filter capacitor; One end of one end of described the 3rd filter capacitor, one end of the 4th filter capacitor, the 5th filter capacitor, one end of the 6th filter capacitor, one end of the 7th filter capacitor and one end of the 8th filter capacitor are all connected two RECT end of wireless charging chip and the other end of the 3rd resistance, the other end of the other end of the 3rd filter capacitor, the other end of the 4th filter capacitor, the 5th filter capacitor, the other end of the 6th filter capacitor, the other end of the 7th filter capacitor and the equal ground connection of the other end of the 8th filter capacitor.
Compared to prior art, the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize provided by the invention, by NFC antenna reception energy signal, by antenna match module, the energy signal that NFC antenna is accepted is maximized, carry out communication by point-to-point with wireless charging transmitting terminal by wireless charging administration module afterwards, and the radio signal receiving is carried out to rectifying and voltage-stabilizing processing, output charging voltage signal, by filtration module, the charging voltage signal of wireless charging administration module output is carried out to filtering processing again, make wireless charging administration module export suitable charging voltage, realize and utilized the existing NFC antenna of wireless wearing equipment to charge, increase charging inlet or increase dedicated antenna without extra on wireless wearing equipment, improve classification of waterproof, avoid taking the limited space of wireless wearing equipment.
Brief description of the drawings
Fig. 1 is that the present invention utilizes the structured flowchart of NFC antenna to the wireless charging device of wireless wearing equipment charge.
Fig. 2 is that the present invention utilizes the circuit diagram of NFC antenna to the wireless charging device of wireless wearing equipment charge.
Fig. 3 is that the present invention utilizes the equivalent circuit diagram of NFC antenna to antenna match module in the wireless charging device of wireless wearing equipment charge.
Embodiment
The invention provides the wireless charging device of a kind of NFC of utilization antenna to wireless wearing equipment charge, can utilize the existing NFC antenna of wireless wearing equipment to arrest energy, and be that 5V direct voltage charges the battery by charging device by energy signal voltage transitions.The present invention, without adopting special wireless charging antenna, has saved the space of wireless wearing equipment.
For making object of the present invention, technical scheme and effect clearer, clear and definite, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The NFC of utilization antenna provided by the invention is connected to the wireless charging device of wireless wearing equipment charge and the battery of wireless wearing equipment and NFC antenna, can utilize the existing NFC antenna of wireless wearing equipment to arrest energy and complete charging.The wearing equipment such as described wireless wearing equipment is intelligent watch, described charging device has utilized the NFC antenna in intelligent watch (because most of intelligent watch all configures NFC antenna, be used for the quick Bluetooth pairing of short-distance transmission and mobile phone), receive NFC signal and wireless charging signal, the wireless signal receiving is converted to 5V direct voltage through wireless charging managing chip to charge to intelligent watch, because the power consumption of intelligent watch own is minimum, so just charge without cable, directly charge to intelligent watch in any place that has or not line charging, even can charge to intelligent watch by the NFC function of mobile phone, realize whenever and wherever possible and having charged to smart mobile phone, and its charging modes is very convenient.
Refer to Fig. 1, described wireless charging device comprises: antenna match module 20, wireless charging administration module 30 and filtration module 40, the input of antenna match module 20 connects the input of the output connection wireless charging administration module 30 of NFC antenna 10, antenna match module 20, and the output of wireless charging administration module 30 connects battery 50, is also connected with battery 50 by filtration module 40.
The NFC antenna 10 of wireless wearing equipment is for receiving and dispatching energy signal (when wireless wearing electricity device power-up, even without any receiving equipment, also can regular intervals of time send energy pilot signal), in the time of charging, arrest wireless energy signal by NFC antenna 10, the energy signal that by antenna match module 20, NFC antenna 10 is accepted afterwards maximizes, the energy signal by wireless charging administration module 30, antenna match module 20 being transmitted again carries out standard judgement (as Qi standard or PMA standard), and transmit self attributes information (as: affiliated standard by communication unit (following wireless charging administration module 30) to transmitting terminal (as mobile phone), demand current), allow transmitting terminal judge, if criterion conforms with the regulations, transmitting terminal continues to send energy signal, receiving terminal (being wireless wearing equipment) carries out rectifying and voltage-stabilizing processing to the energy signal receiving, output charging voltage signal, the charging voltage signal of by filtration module 40, wireless charging administration module 30 being exported again carries out filtering and feeds back charging voltage, to export suitable charging voltage to battery interface 50, battery interface 50 connects battery charging, utilize the existing NFC antenna 10 of wireless wearing equipment to charge thereby realized, increase charging inlet or increase antenna without extra on wireless wearing equipment, avoid taking the limited space of wireless wearing equipment.
Wherein, described wireless charging administration module 30 comprises wireless charging unit 301, self-powered coupling unit 302, communication coupling unit 303, pre-sampling unit 304, foreign matter detecting unit 305, output current setting unit 306, temperature detecting unit 307, voltage feedback unit 308 and enables unit 309.Described self-powered coupling unit 302, communication coupling unit 303, pre-sampling unit 304, foreign matter detecting unit 305, output current setting unit 306, temperature detecting unit 307 and enable unit 309 and be all connected wireless charging unit 301, described wireless charging unit 301 is also connected battery 50 by filtration module 40 with 308 yuan of Voltage Feedback lists successively.
Described wireless charging unit 301 is for carrying out point-to-point communication with wireless charging transmitting terminal, whether the signal that judges the transmitting of wireless charging transmitting terminal by guiding energy/communications protocol meets Qi standard or PMA standard, if standard meets, the radio signal receiving is carried out to rectifying and voltage-stabilizing processing, output charging voltage signal.Described self-powered coupling unit 302 is for providing the power supply of operation to wireless charging unit 301.Described communication coupling unit 303 is for carrying out communication with wireless charging transmitting terminal.Described pre-sampling unit 304, for high voltage protection, prevents that the energy signal overtension of input from damaging described wireless charging device, can protect as input voltage exceedes 15V.Described foreign matter detecting unit 305 detects for foreign matter.Described output current setting unit 306 is for arranging maximum output current.Described temperature detecting unit 307 is for high temperature protection, and the temperature while detecting charging, prevents that excess Temperature from damaging wireless wearing equipment.Described voltage feedback unit 308 is for detection of output voltage.The described unit 309 that enables is for controlling the operating state of wireless charging unit 301, and while not needing to control, this enables unit 309 ground connection.
See also Fig. 2, described antenna match module 20 comprises: the first antenna wiring point 201, the second antenna connection point 202, series connection matching unit 203 and matching unit in parallel 204; Described the first antenna wiring point 201 with the second antenna connection point 202 for being connected antenna 10, one end of described series connection matching unit 203 connects the first antenna wiring point 201, and the other end of series connection matching unit 203 connects wireless charging administration module 30, also connects the second antenna connection point 202 and wireless charging administration module 30 by matching unit 204 in parallel.Described series connection matching unit 203 and matching unit in parallel 204 can, according to the concrete electromagnetic environment debugging of wireless wearing equipment (as intelligent watch), obtain more signal energy as far as possible.In other embodiments, the function of this series connection matching unit 203 and matching unit in parallel 204 also can adopt resistance or inductance to realize.
Described series connection matching unit 203 comprises: the first capacitor C 1, the second capacitor C 2 and the 3rd capacitor C 3, the other end, the other end of the second capacitor C 2 and the other end of the 3rd capacitor C 3 that one end of one end of described the first capacitor C 1, one end of the second capacitor C 2 and the 3rd capacitor C 3 is all connected the first antenna wiring point 201, the first capacitor C 1 are all connected wireless charging administration module 30, also connect wireless charging administration module 30 and the second antenna connection point 202 by matching unit 204 in parallel.Because induction reactance and the conventional wireless charging antenna of NFC antenna are different, and there is consistency difference, by adjusting these three capacitances (i.e. the capacitance of the first capacitor C 1, the second capacitor C 2 and the 3rd capacitor C 3), can make resonance frequency consistent with transmitting terminal output frequency, to obtain ceiling capacity signal.
Described matching unit in parallel 204 comprises the 4th capacitor C 4 and the 5th capacitor C 5, one end of described the 4th capacitor C 4 is all connected the other end of the first capacitor C 1, the other end of the second capacitor C 2, the other end and the wireless charging administration module 30 of the 3rd capacitor C 3 with one end of the 5th capacitor C 5, and the other end of the other end of described the 4th capacitor C 4 and the 5th capacitor C 5 is all connected wireless charging administration module 30 and the second antenna connection point 202.
As shown in Figure 3, wherein, Ls is the induction reactance of NFC antenna 10 to the equivalent circuit diagram of described antenna match module 20, is 3.91uH; C1 ' is the total capacitance value of C1, C2 and C3 parallel connection, the total capacitance value of the matching unit 203 of connecting; C2 ' is the total capacitance value of C4 and C5 parallel connection, i.e. the total capacitance value of matching unit 204 in parallel.The capacitance C1 ' of described series connection matching unit 203 and the capacitance C2 ' of matching unit 204 in parallel can calculate according to the induction reactance Ls of different N FC antenna 10.Specific formula for calculation is as follows:
C1′=[Ls*(fs*2π)
2]
-1
Wherein, fs is 100kHz, and Ls is 3.91uH, calculates C1 '=0.65uF;
C2′=[Ls*(fD*2π)?
2-1/C1′]?
-1
Wherein, fD is 1MHz, and Ls is 3.91uH, calculates C2 '=6.5nF;
By the induction reactance Ls of NFC antenna 10, calculate the series connection capacitance C1 ' of matching unit 203 and the capacitance C2 ' of matching unit 204 in parallel, thus the energy maximization that NFC antenna 10 is accepted.
Please continue to refer to Fig. 2, described wireless charging unit 301 comprises wireless charging chip U1, the chip that preferably model of Ti company is BQ51013B.
Described self-powered coupling unit 302 comprises the first self-powered coupling capacitance C6 and the second self-powered coupling capacitance C7; The first self-powered coupling capacitance C6 and the second self-powered coupling capacitance C7 completely and first do not obtain electric weight from emitted energy signal electric in the situation that and start to exercise basic communication/management function to receiving equipment at wireless wearing equipment for being responsible for; One end of described the first self-powered coupling capacitance C6 connects the BOOT1 end of wireless charging chip U1, and the other end of the first self-powered coupling capacitance C6 connects two AC1 ends of wireless charging chip U1, the other end of the first capacitor C 1, the other end of the second capacitor C 2, the other end, one end of the 4th capacitor C 4 and one end of the 5th capacitor C 5 of the 3rd capacitor C 3.One end of described the second self-powered coupling capacitance C7 connects the BOOT2 end of wireless charging chip U1, and the other end of the second self-powered coupling capacitance C7 connects two AC2 ends, the other end of the 4th capacitor C 4 and the other ends of the 5th capacitor C 5 of wireless charging chip U1.Described the first self-powered coupling capacitance C6 and the second self-powered coupling capacitance C7 are mainly used in providing the power supply of operation to wireless charging unit 301.
Described communication coupling unit 303 comprises the first communication coupling capacitance C8 and the second communication coupling capacitance C9; One end of described the first communication coupling capacitance C8 connects the COMM1 end of wireless charging chip U1, and the other end of the first communication coupling capacitance C8 connects two AC1 ends of wireless charging chip U1; One end of described the second communication coupling capacitance C9 connects the COMM2 end of wireless charging chip U1, and the other end of described the second communication coupling capacitance C9 connects two AC2 ends of wireless charging chip U1; Described the first communication coupling capacitance C8 and the second communication coupling capacitance C9 are mainly used in carrying out communication with wireless charging transmitting terminal, specifically for sending the modulation /demodulation of communication password and transmitting/receiving system information, complete communication.
Described pre-sampling unit 304 comprises the first clamping capacitance C10 and the second clamping capacitance C11; One end of described the first clamping capacitance C10 connects the CLMP2 end of wireless charging chip U1, and the other end of the first clamping capacitance C10 connects two AC2 ends of wireless charging chip U1; One end of described the second clamping capacitance C11 connects the CLMP1 end of wireless charging chip U1, and the other end of the second clamping capacitance connects two AC1 ends of wireless charging chip U1 and the other end of the first self-powered coupling capacitance C6; Described the first clamping capacitance C10 and the second clamping capacitance C11 are mainly used in high voltage protection, prevent that the energy signal overtension of input from damaging described wireless charging device, and in the present embodiment, the energy signal voltage of input exceedes 15V and can protect.
Described foreign matter detecting unit 305 comprises the first resistance R 1, and described output current setting unit 306 comprises the second resistance R 2, and voltage feedback unit 308 comprises the 3rd resistance R 3 and the 4th resistance R 4, and described temperature detecting unit 307 comprises NTC thermistor RNTC.
The FOD end of described wireless charging chip U1 is by the first resistance R 1 ground connection; Described the first resistance R 1 is mainly used in foreign matter and detects, and detection signal is fed back to wireless charging chip U1, prevents wiring error.
The ILIM end of described wireless charging chip U1 connects the FOD end of wireless charging chip U1, one end, one end of the 3rd resistance R 3 and one end of the 4th resistance R 4 of the first resistance R 1 by the second resistance R 2; Described the second resistance R 2 is mainly used in arranging maximum output current, and in the present embodiment, maximum output current Imax computing formula is: Imax=262/R2.
The other end of described the 3rd resistance connects filtration module, and the other end of the 4th resistance connects battery interface 501, and this battery interface 501 is for connecting battery.Described the 3rd resistance R 3 and the 4th resistance R 4 are mainly for detection of the output voltage of wireless charging chip U1.
One end of described NTC thermistor RNTC connects the TS-CTRL end of wireless charging chip U1, and the other end ground connection of NTC thermistor RNTC, is mainly used in high temperature protection, and the temperature while detecting charging, prevents that excess Temperature from damaging wireless wearing equipment.
The described unit 309 that enables comprises the 5th resistance R 5; One end of described the 5th resistance R 5 connects the EN1 end of wireless charging chip U1, the other end ground connection of the 5th resistance R 5, and EN2 end and four PGND of described wireless charging chip U1 hold equal ground connection.Described the 5th resistance R 5 is mainly used in controlling the use state of wireless charging unit 301, while not needing to use, makes EN1 end ground connection.
Four OUT ends of described wireless charging chip U1 are all connected battery interface 501 by filtration module 40 with two RECT ends, are charged the battery by OUT end output charging voltage to battery interface 501.
Further, described wireless charging unit 301 also comprises the 6th resistance R 6 and LED, described wireless charging chip U1 /CHG end is by the negative pole of the 6th resistance R 6 connecting luminous diode LED, the positive pole of LED connects battery interface 501(and is equivalent to connection battery), also connect four OUT ends of wireless charging chip U1 by filtration module 40, provide high potential by battery to the positive pole of light-emitting diode, in the time of wireless wearing equipment charge, wireless charging chip U1 /CHG end output low level lights LED, charge with instruction.
Further, described wireless charging unit 301 also comprises the 7th resistance R 7, and the AD end of described wireless charging chip U1 is by the 7th resistance R 7 ground connection.Described wireless charging unit 301 also comprises the first test point 3011 and the second test point 3012, and the AD end of described wireless charging chip U1 connects described the first test point 3011, wireless charging chip U1 /AD-EN end connection the second test point 3012.
An important improvement of the present invention is the improvement of the circuit structure to filtration module 40, please continue to refer to Fig. 2, described filtration module 40 comprises the first filter capacitor C12, the second filter capacitor C13, the 3rd filter capacitor C14, the 4th filter capacitor C15, the 5th filter capacitor C16, the 6th filter capacitor C17, the 7th filter capacitor C18 and the 8th filter capacitor C19, four OUT ends that one end of one end of described the first filter capacitor C12 and the second filter capacitor C13 is all connected wireless charging chip U1 are equivalent to and are connected battery with battery interface 501(), the equal ground connection of the other end of the other end of the first filter capacitor C12 and the second filter capacitor C13, one end of described the 3rd filter capacitor C14, one end of the 4th filter capacitor C15, one end of the 5th filter capacitor C16, one end of the 6th filter capacitor C17, one end of one end of the 7th filter capacitor C18 and the 8th filter capacitor C19 is all connected two RECT end of wireless charging chip U1 and the other end of the 3rd resistance R 3, the other end of the 3rd filter capacitor C14, the other end of the 4th filter capacitor C15, the other end of the 5th filter capacitor C16, the other end of the 6th filter capacitor C17, the equal ground connection of the other end of the other end of the 7th filter capacitor C18 and the 8th filter capacitor C19.The charging voltage signal that described filtration module 40 is mainly used in that wireless charging administration module 30 is exported carries out filtering and feeds back charging voltage to wireless charging chip U1, makes it export suitable charging voltage and charges the battery.
In the present embodiment, the capacitance of described the first filter capacitor C12 is 100nf, the capacitance of the second filter capacitor C13 is that the capacitance of 10uf, the 3rd filter capacitor C14 is 100nf, and the capacitance of the 4th filter capacitor C15, the 5th filter capacitor C16, the 6th filter capacitor C17, the 7th filter capacitor C18 and the 8th filter capacitor C19 is 2.2uf.The present invention replaces the large capacitance electric capacity in the peripheral electric capacity of BQ51013B chip standard by the electric capacity that multiple capacitances are lower is set, and can greatly reduce overall thickness, is conducive to intelligent watch ultrathin, the external form effect of improving product.Select each capacitance, preferentially selecting the withstand voltage electric capacity for 25V.
In sum, the present invention utilizes the existing NFC antenna of wireless wearing equipment to charge, and increases charging inlet or increases antenna without extra, has improved classification of waterproof, avoids taking the limited space of wireless wearing equipment.
The present invention uses the BQ51013B wireless charging chip of Ti company and wireless charging transmitting terminal to carry out point-to-point communication in the time of charging, and whether the signal that judges the transmitting of wireless charging transmitting terminal meets Qi standard or PMA standard, effectively prevent the interference of other wireless signals, made charging become convenient and reliable.
In addition, the present invention, by adopting the electric capacity that several capacitances are less also to replace the electric capacity that capacitance is large, in reaching filter effect, has reduced complete machine thickness.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. utilize the wireless charging device of NFC antenna to wireless wearing equipment charge, be connected with battery and the NFC antenna of wireless wearing equipment, it is characterized in that, comprising:
Antenna match module, for maximizing the energy signal that NFC antenna is accepted;
Wireless charging administration module, for carrying out communication by point-to-point with wireless charging transmitting terminal, and carries out rectifying and voltage-stabilizing processing to the radio signal receiving, output charging voltage signal;
Filtration module, for the charging voltage signal of wireless charging administration module output is carried out to filtering processing, makes wireless charging administration module export suitable charging voltage;
The input of described antenna match module connects NFC antenna, and the output of antenna match module connects the input of wireless charging administration module, and the output of described wireless charging administration module connects battery, also connects battery by filtration module.
2. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 1, is characterized in that, described antenna match module comprises: the first antenna wiring point, the second antenna connection point, series connection matching unit and matching unit in parallel; One end of described series connection matching unit connects the first antenna wiring point, and the other end of series connection matching unit connects wireless charging administration module, also connects the second antenna connection point and wireless charging administration module by matching unit in parallel.
3. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 2, it is characterized in that, described series connection matching unit comprises: the first electric capacity, the second electric capacity and the 3rd electric capacity, one end of described the first electric capacity, one end of one end of the second electric capacity and the 3rd electric capacity is all connected the first antenna wiring point, the other end of the first electric capacity, the other end of the other end of the second electric capacity and the 3rd electric capacity is all connected wireless charging administration module, also connect wireless charging administration module and the second antenna connection point by matching unit in parallel, described the first electric capacity, the second electric capacity and the 3rd electric capacity, be used for making resonance frequency consistent with transmitting terminal output frequency, to obtain ceiling capacity signal.
4. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 3, it is characterized in that, described matching unit in parallel comprises the 4th electric capacity and the 5th electric capacity, one end of described the 4th electric capacity is all connected the other end of the first electric capacity, the other end of the second electric capacity, the other end and the wireless charging administration module of the 3rd electric capacity with one end of the 5th electric capacity, and the other end of the other end of described the 4th electric capacity and the 5th electric capacity is all connected wireless charging administration module and the second antenna connection point.
5. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 4, it is characterized in that, described wireless charging administration module comprises wireless charging unit, self-powered coupling unit, communication coupling unit, pre-sampling unit, foreign matter detecting unit, output current setting unit, temperature detecting unit, voltage feedback unit and enables unit; Described self-powered coupling unit, communication coupling unit, pre-sampling unit, foreign matter detecting unit, output current setting unit, temperature detecting unit and enable unit and be all connected wireless charging unit, described wireless charging unit is also connected battery by filtration module with voltage feedback unit successively.
6. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 5, it is characterized in that, described wireless charging unit comprises wireless charging chip, described self-powered coupling unit comprises the first self-powered coupling capacitance and the second self-powered coupling capacitance, the in the situation that the first self-powered coupling capacitance and the second self-powered coupling capacitance being electric for not having completely at wireless wearing equipment, first obtain electric weight from emitted energy signal and to wireless wearing equipment, it is started, to exercise basic communication/management function; Described communication coupling unit comprises the first communication coupling capacitance and the second communication coupling capacitance, and the first communication coupling capacitance and the second communication coupling capacitance, for sending the modulation /demodulation of communication password and transmitting/receiving system information, complete communication; Described pre-sampling unit comprises the first clamping capacitance and the second clamping capacitance, described foreign matter detecting unit comprises the first resistance, described output current setting unit comprises the second resistance, described temperature detecting unit comprises NTC thermistor, described voltage feedback unit comprises the 3rd resistance and the 4th resistance, described in enable unit and comprise the 5th resistance;
One end of described the first self-powered coupling capacitance connects the BOOT1 end of wireless charging chip, and the other end of the first self-powered coupling capacitance connects two AC1 ends of wireless charging chip, the other end of the first electric capacity, the other end of the second electric capacity, the other end, one end of the 4th electric capacity and one end of the 5th electric capacity of the 3rd electric capacity;
One end of described the second self-powered coupling capacitance connects the BOOT2 end of wireless charging chip, and the other end of the second self-powered coupling capacitance connects two AC2 ends, the other end of the 4th electric capacity and the other ends of the 5th electric capacity of wireless charging chip;
One end of described the first communication coupling capacitance connects the COMM1 end of wireless charging chip, and the other end of the first communication coupling capacitance connects two AC1 ends of wireless charging chip; One end of described the second communication coupling capacitance connects the COMM2 end of wireless charging chip, and the other end of described the second communication coupling capacitance connects two AC2 ends of wireless charging chip;
One end of described the first clamping capacitance connects the CLMP2 end of wireless charging chip, and the other end of the first clamping capacitance connects two AC2 ends of wireless charging chip; One end of described the second clamping capacitance connects the CLMP1 end of wireless charging chip, and the other end of the first clamping capacitance connects two AC1 ends of wireless charging chip and the other end of the first self-powered coupling capacitance;
The FOD end of described wireless charging chip is by the first grounding through resistance, the ILIM end of described wireless charging chip connects FOD end, one end of the 3rd resistance and one end of the 4th resistance of wireless charging chip by the second resistance, the other end of described the 3rd resistance connects filtration module, and the other end of the 4th resistance connects battery;
Four OUT ends of described wireless charging chip are all connected battery by filtration module with two RECT ends, the TS-CTRL end of described wireless charging chip is by NTC thermistor ground connection, the EN1 end of wireless charging chip is by the 5th grounding through resistance, and EN2 end and four PGND of described wireless charging chip hold equal ground connection.
7. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 6, it is characterized in that, described wireless charging unit also comprises the 6th resistance and light-emitting diode, described wireless charging chip /CHG end is by the negative pole of the 6th resistance connecting luminous diode, and the positive pole of light-emitting diode connects battery, also connects four OUT ends of wireless charging chip by filtration module.
8. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 6, is characterized in that, described wireless charging unit also comprises the 7th resistance, and the AD end of described wireless charging chip is by the 7th grounding through resistance.
9. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 6, it is characterized in that, described wireless charging unit also comprises the first test point and the second test point, the AD end of described wireless charging chip connects described the first test point, wireless charging chip /AD-EN end connection the second test point.
10. the wireless charging device of NFC antenna to wireless wearing equipment charge that utilize according to claim 6, it is characterized in that, described filtration module comprises the first filter capacitor, the second filter capacitor, the 3rd filter capacitor, the 4th filter capacitor, the 5th filter capacitor, the 6th filter capacitor, the 7th filter capacitor and the 8th filter capacitor; Four OUT that one end of one end of described the first filter capacitor and the second filter capacitor is all connected wireless charging chip hold and battery, the equal ground connection of the other end of the other end of the first filter capacitor and the second filter capacitor; One end of one end of described the 3rd filter capacitor, one end of the 4th filter capacitor, the 5th filter capacitor, one end of the 6th filter capacitor, one end of the 7th filter capacitor and one end of the 8th filter capacitor are all connected two RECT end of wireless charging chip and the other end of the 3rd resistance, the other end of the other end of the 3rd filter capacitor, the other end of the 4th filter capacitor, the 5th filter capacitor, the other end of the 6th filter capacitor, the other end of the 7th filter capacitor and the equal ground connection of the other end of the 8th filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410391631.0A CN104167788A (en) | 2014-08-11 | 2014-08-11 | Wireless charging device for charging wireless wearable device through NFC antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410391631.0A CN104167788A (en) | 2014-08-11 | 2014-08-11 | Wireless charging device for charging wireless wearable device through NFC antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104167788A true CN104167788A (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410391631.0A Pending CN104167788A (en) | 2014-08-11 | 2014-08-11 | Wireless charging device for charging wireless wearable device through NFC antenna |
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| Country | Link |
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| CN (1) | CN104167788A (en) |
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Application publication date: 20141126 |