CN104113119A - Charging unit for charging wireless wearable device with NFC (Near Field Communication) antenna - Google Patents

Charging unit for charging wireless wearable device with NFC (Near Field Communication) antenna Download PDF

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Publication number
CN104113119A
CN104113119A CN201410365086.8A CN201410365086A CN104113119A CN 104113119 A CN104113119 A CN 104113119A CN 201410365086 A CN201410365086 A CN 201410365086A CN 104113119 A CN104113119 A CN 104113119A
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China
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voltage
resistance
nfc antenna
antenna
full
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CN201410365086.8A
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Chinese (zh)
Inventor
陈长荣
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TCL Communication Ningbo Ltd
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TCL Communication Ningbo Ltd
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Priority to CN201410365086.8A priority Critical patent/CN104113119A/en
Publication of CN104113119A publication Critical patent/CN104113119A/en
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Abstract

The invention discloses a charging unit for charging a wireless wearable device with an NFC antenna. The charging unit for charging the wireless wearable device with the NFC antenna is connected with a battery of the wireless wearable device and the NFC antenna and comprises an antenna matching module, a rectifying and voltage regulating module and an energy collection module; the NFC antenna, the antenna matching module, the rectifying and voltage regulating module and the energy collection module are sequentially connected with the battery. According to the charging unit for charging the wireless wearable device with the NFC antenna, the NFC antenna receives energy signals, the antenna matching module maximizes the energy signal received by the NFC antenna, the energy signal is input into the energy collection module after the rectifying and voltage regulating module performs rectifying and voltage regulating treatment on the energy signal, and the energy collection module converts the voltage of the energy signal into the preset charging voltage to charge the battery, so that charging through the NFC antenna of the wireless wearable device is achieved without additionally arranging a charging jack or an antenna and a special chip on the wireless wearable device, and furthermore, the occupation of limited space of the wireless wearable device is avoided.

Description

A kind of NFC antenna that utilizes is to the charging device of wireless wearing equipment charge
Technical field
The present invention relates to electronic product charging technique, particularly a kind of NFC antenna that utilizes is to the charging device of wireless wearing equipment charge.
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, the phone in can synchronous mobile phone, note, mail, photo, music etc.There is in the market the intelligent watch of producing with apple, Sony, showed very bright eye, 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, to user, provide convenience, 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, affected whole aesthetic feeling.
In addition, there is the wireless wearing equipment of part can realize wireless charging, but need on equipment, increase special-purpose antenna and special-purpose charge controlling chip, also need to take the limited space of wireless wearing equipment.In when charging, need advanced person's news that work to shake hands, meeting communication protocol standard requirement could charge, otherwise equipment shows as holding state, can only search for energy signal, so the requirement of existing wireless charging mode is higher.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 a kind of NFC of utilization antenna to the charging device of 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 NFC antenna to a charging device for wireless wearing equipment charge, be connected with NFC antenna with the battery 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;
Rectifying and voltage-stabilizing module, for carrying out rectification and voltage stabilizing processing to the energy signal of antenna match module transmission;
Can quantity set obtain module, for being that preset charged voltage charges the battery by the voltage transitions of described energy signal;
Described NFC antenna, antenna match module, rectifying and voltage-stabilizing module, energy quantity set obtain module and are connected successively with battery.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, and described energy quantity set obtains module and comprises:
Amplitude sample unit, for amplitude and the rule of the described energy signal of sampling;
Voltage conversion unit, for being that preset charged voltage charges the battery by the voltage transitions of the energy signal of amplitude sample unit sampling;
Overvoltage setting unit, for arranging overvoltage protection threshold voltage;
Low pressure setting unit, for arranging low-voltage variation threshold voltage;
Storage boosting unit, for input voltage is carried out to energy storage, and when low-voltage is inputted, to the input voltage processing of boosting;
Be full of voltage setting unit, for battery is set, be full of the charged state of voltage and hysteresis voltage management battery;
Described amplitude sample unit, overvoltage setting unit, low pressure setting unit, store boosting unit and be full of voltage setting unit and be all connected voltage conversion unit, described amplitude sample unit is also connected antenna match module with storage boosting unit.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, described antenna match module comprises: the first build-out resistor and the second build-out resistor, one end of one end of described the first build-out resistor and the second build-out resistor is all connected NFC antenna and rectifying and voltage-stabilizing module, the equal ground connection of the other end of the other end of the first build-out resistor and the second build-out resistor.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, and described rectifying and voltage-stabilizing module comprises: diode and the first electric capacity; The positive pole of described diode connects one end of described the first build-out resistor, one end of the second build-out resistor and NFC antenna, and the negative pole of diode is by storage boosting unit connection voltage conversion unit, also by the first capacity earth.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, the inductance that described storage boosting unit comprises, the second electric capacity and the 3rd appearance; Described voltage conversion unit comprises voltage transitions chip; One end of described inductance connects the negative pole of diode, and the other end of inductance connects the LBST end of voltage transitions chip; Hold with the VSTOR that the 3rd one end holding is all connected voltage transitions chip one end of described the second electric capacity, the other end of described the second electric capacity and the 3rd equal ground connection of the other end of holding; The positive pole of described battery connects the VBAT end of voltage transitions chip.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, described amplitude sample unit comprises the first sampling resistor and the second sampling resistor, one end of described the first sampling resistor connects the VIN_DC end of the negative pole of diode, one end of inductance and voltage transitions chip, and the VDC_SAMP that the other end of described the first sampling resistor connects voltage transitions chip holds, also passes through the second sampling resistor ground connection.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, and described overvoltage setting unit comprises that the first overvoltage arranges resistance and the second overvoltage arranges resistance; One end that described the first overvoltage arranges resistance connects the VBAT_OV end of voltage transitions chip, also by the second overvoltage, the VRDIV end of resistance connection voltage transitions chip is set and is full of voltage setting unit, and the first overvoltage arranges the other end ground connection of resistance.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, and described low pressure setting unit comprises that the first low pressure arranges resistance and the second low pressure arranges resistance; One end that described the first low pressure arranges resistance connects the VBAT_UV end of voltage transitions chip, also by the second low pressure, the VRDIV end of resistance connection voltage transitions chip is set and is full of voltage setting unit, and the first low pressure arranges the other end ground connection of resistance.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, the described voltage setting unit that is full of comprises that first is full of voltage resistance is set, second is full of voltage arranges resistance and sluggish resistance, described first is full of one end and second that voltage arranges resistance is full of the OK_PROG end that one end that voltage arranges resistance is all connected voltage transitions chip, first is full of the other end ground connection that voltage arranges resistance, described second is full of voltage arranges the OK_HYST end that the other end of resistance and one end of sluggish resistance are all connected voltage transitions chip, the other end of described sluggish resistance connects the VRDIV end of voltage transitions chip, the second overvoltage arranges one end of resistance and one end that the second low pressure arranges resistance.
Described utilizes NFC antenna in the charging device of wireless wearing equipment charge, and described wireless wearing equipment is intelligent watch.
Compared to prior art, the NFC antenna that utilizes provided by the invention is to the charging device of wireless wearing equipment charge, by NFC antenna reception energy signal, the energy signal that NFC antenna is accepted by antenna match module maximizes, by rectifying and voltage-stabilizing module, carrying out rectification and voltage stabilizing afterwards processes input and can obtain in module by quantity set, by energy quantity set, obtaining module is that preset charged voltage charges the battery by the voltage transitions of energy signal, realized and utilized the existing NFC antenna of wireless wearing equipment to charge, without extra on wireless wearing equipment, increase charging inlet or increase antenna and special chip, avoid taking the limited space of wireless wearing equipment.
Accompanying drawing explanation
Fig. 1 is that the present invention utilizes NFC antenna to the structured flowchart of the charging device of wireless wearing equipment charge.
Fig. 2 is that the present invention utilizes NFC antenna to the circuit diagram of the charging device of wireless wearing equipment charge.
Embodiment
The invention provides a kind of NFC of utilization antenna to the charging device of wireless wearing equipment charge, can utilize the existing NFC antenna of wireless wearing equipment to arrest energy, and by energy signal voltage transitions, be that 4V and 5V voltage charge the battery by charging device.The present invention is without adopting special-purpose wireless charging chip and agreement, but any energy signal that can receive in general receiving space is not subject to protocols limit, and wireless charging requires low.
For making object of the present invention, technical scheme and effect clearer, clear and definite, referring to accompanying drawing, developing simultaneously, 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 charging device of wireless wearing equipment charge and the battery of wireless wearing equipment with 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 charged to intelligent watch through rectifying and voltage-stabilizing, because the power consumption of intelligent watch own is minimum, so just without cable, charge, directly in any place of line charging that has or not, to intelligent watch, charge, even can to intelligent watch, charge by the NFC function of mobile phone, realized whenever and wherever possible and having charged to smart mobile phone, and its charging modes is very convenient.
Refer to Fig. 1, described charging device comprises: antenna match module 20, rectifying and voltage-stabilizing module 30 and energy quantity set obtain module 40, and described NFC antenna 10, antenna match module 20, rectifying and voltage-stabilizing module 30, energy quantity set obtain module 40 and be connected successively with battery Battery.
The NFC antenna 10 of mobile terminal is for receiving and dispatching energy signal, when charging, by NFC antenna 10, arrest wireless energy signal, the energy signal that by antenna match module 20, NFC antenna 10 is accepted afterwards maximizes, the energy signal being transmitted by 30 pairs of antenna match modules of rectifying and voltage-stabilizing module 20 again carries out rectification and voltage stabilizing is processed, make the voltage stabilization of energy signal to fixing value, by energy quantity set, obtaining module 40 is again that preset charged voltage charges to battery Battery by the voltage transitions of described energy signal, thereby realized, utilize the existing NFC antenna 10 of wireless wearing equipment to charge, without additionally increasing charging inlet at wireless wearing equipment or increasing antenna and special chip, avoid taking the limited space of wireless wearing equipment.
Wherein, the described module 40 that can quantity set obtains comprises amplitude sample unit 401, voltage conversion unit 402, overvoltage setting unit 403, low pressure setting unit 404, storage boosting unit 405 and is full of voltage setting unit 406.Described amplitude sample unit 401 amplitudes for the described energy signal of sampling and rule.Described voltage conversion unit 402 is for being that preset charged voltage charges to battery Battery by the voltage transitions of the energy signal of amplitude sample unit 401 sampling.Described overvoltage setting unit 403 is for arranging overvoltage protection threshold voltage, and described low pressure setting unit 404 is for arranging low-voltage variation threshold voltage.Described storage boosting unit 405 is for input voltage is carried out to energy storage, and when low-voltage is inputted, to the input voltage processing of boosting.The described voltage setting unit 406 that is full of is full of the charged state of voltage and hysteresis voltage management battery Battery for battery Battery is set.
Described amplitude sample unit 401, overvoltage setting unit 403, low pressure setting unit 404, storage boosting unit 405 be full of voltage setting unit 406 and be all connected voltage conversion unit 402, voltage conversion unit 402 is controlled operating state by it, described amplitude sample unit 401 is also connected antenna match module 20 with storage boosting unit 405, described amplitude sample unit 401 sampling antenna match modules 20 get energy voltage signal and transfer to voltage conversion unit 402, described storage boosting unit 405 gets energy in antenna match module 20 and starts energy storage, and when low-voltage is inputted, to the input voltage processing of boosting.
See also Fig. 2, described antenna match module 20 comprises: the first build-out resistor R1 and the second build-out resistor R2, one end of one end of described the first build-out resistor R1 and the second build-out resistor R2 is all connected the equal ground connection of the other end of the other end and the second build-out resistor R2 of NFC antenna 10 and rectifying and voltage-stabilizing module 30, the first build-out resistor R1.Described the first build-out resistor R1 and the second build-out resistor R2 can, according to the concrete electromagnetic environment debugging of wireless wearing equipment (as intelligent watch), make to accept energy maximization.In other embodiments, the function of this first build-out resistor R1 and the second build-out resistor R2 also can adopt electric capacity or inductance to realize.
Described rectifying and voltage-stabilizing module 30 comprises: diode D1 and the first capacitor C 1; The positive pole of described diode D1 connects one end of described the first build-out resistor R1, one end of the second build-out resistor R2 and NFC antenna 10, and the negative pole of diode D1 is by storage boosting unit 405 connection voltage conversion units 402, also by the first capacitor C 1 ground connection.In rectifying and voltage-stabilizing module 30, the capacitance of described the first capacitor C 1 is 4.7uF, by diode D1, the energy signal of the first build-out resistor R1 and the second build-out resistor R2 debugging is carried out to rectification processing, by the first capacitor C 1, boost and process with filtering again, unsettled energy signal is stablized to 0.8V left and right.
Please continue to refer to Fig. 2, inductance L 1, the second capacitor C 2 and the 3rd capacitor C 3 that described storage boosting unit 405 comprises, described voltage conversion unit 402 comprises voltage transitions chip, the withstand voltage of described the second capacitor C 2 and the 3rd capacitor C 3 is 6V.One end of described inductance L 1 connects the negative pole of diode D1, and the other end of inductance L 1 connects the LBST end of voltage transitions chip; One end of one end of described the second capacitor C 2 and the 3rd capacitor C 3 is all connected the VSTOR end of voltage transitions chip, the equal ground connection of the other end of the other end of described the second capacitor C 2 and the 3rd capacitor C 3; The positive pole of described battery Battery connects the VBAT end of voltage transitions chip.After being risen by inductance L 1 electricity, by the second capacitor C 2 and the 3rd capacitor C 3 energy storage, there is stable satisfactory high level output to charge to battery Battery when guaranteeing low-voltage input.
The model of described voltage transitions chip is bq25504, is mainly used in the 0.8V of rectifying and voltage-stabilizing module 30 output and above signal energy storage and is converted to 4.2V or the charging voltage signal of 5V charges to battery Battery.
Particularly, described amplitude sample unit 401 comprises the first sampling resistor R oC1with the second sampling resistor R oC2, described the first sampling resistor R oC1one end connect negative pole, one end of inductance L 1 and the VIN_DC of the voltage transitions chip end of diode D1, described the first sampling resistor R oC1the other end connect the VDC_SAMP end of voltage transitions chip, also by the second sampling resistor R oC2ground connection.Wherein, the first sampling resistor R oC1resistance be 4.42 megaohms, the second sampling resistor R oC2resistance be 15.62 megaohms, for inputting energy, take corresponding algorithm, to obtain maximum energy.
Described overvoltage setting unit 403 comprises that the first overvoltage arranges resistance R oV1with the second overvoltage, resistance R is set oV2; Described the first overvoltage arranges resistance R oV1one end connect voltage transitions chip VBAT_OV end, also by the second overvoltage, resistance R is set oV2connect the VRDIV end of voltage transitions chip and be full of voltage setting unit 406, the first overvoltages resistance R is set oV1other end ground connection.In the present embodiment, described the first overvoltage arranges resistance R oV1resistance be that 5.9 megaohms and the second overvoltage arrange resistance R oV2resistance be 4.02 megaohms, be mainly used in arranging the threshold voltage of overvoltage protection, thereby protect whole charging device.
Correspondingly, described low pressure setting unit 404 comprises that the first low pressure arranges resistance R uV1with the second low pressure, resistance R is set uV2; Described the first low pressure arranges resistance R uV1one end connect voltage transitions chip VBAT_UV end, also by the second low pressure, resistance R is set uV2connect the VRDIV end of voltage transitions chip and be full of voltage setting unit 406, the first low pressure resistance R is set uV1other end ground connection.Described the first low pressure arranges resistance R uV1resistance be that 5.6 megaohms and the second low pressure arrange resistance R uV2resistance be 4.42 megaohms, be mainly used in arranging the threshold voltage of low-voltage variation, thereby protect whole charging device.
The described voltage setting unit 406 that is full of comprises that first is full of voltage resistance R is set oK1, second be full of voltage resistance R be set oK2with sluggish resistance R oK3, described first is full of voltage arranges resistance R oK1one end and second be full of the OK_PROG end that one end that voltage arranges resistance is all connected voltage transitions chip, first is full of voltage arranges resistance R oK1other end ground connection, described second is full of voltage arranges resistance R oK2the other end and sluggish resistance R oK3one end all connect the OK_HYST end of voltage transitions chip, described sluggish resistance R oK3the other end VRDIV end, the second overvoltage that connect voltage transitions chip resistance R is set oV2one end and the second low pressure resistance R is set uV2one end.
Wherein, described first is full of voltage resistance R is set oK1resistance be that 4.42 megaohms and second are full of voltage resistance R is set oK2resistance be 4.22 megaohms, for battery Battery is set, be full of voltage, sluggish resistance R oK3resistance be 1.43 megaohms, for hysteresis voltage is set, by battery Battery, be full of the charged state that voltage and hysteresis voltage are managed battery Battery, in order to avoid frequent switch affects the useful life of charging device.For example, when battery Battery being set being charged to 4.2 volts, represent that battery Battery is full of voltage, now hysteresis voltage just can be set as 4.0V, like this, in when charging, battery Battery stops charging to 4.2 volts, waits to drop to 4.0 volts and restart charging again, if two voltages all arrange 4.2V, thereby likely charging device constantly cuts out/restarts at 4.2V and affects circuit lifetime.
In sum, the NFC antenna that utilizes provided by the invention is to the charging device of wireless wearing equipment charge, by NFC antenna reception energy signal, the energy signal that NFC antenna is accepted by antenna match module maximizes, by rectifying and voltage-stabilizing module, carrying out rectification and voltage stabilizing afterwards and process input and can obtain in module by quantity set, is that preset charged voltage charges the battery by can quantity set obtaining module by the voltage transitions of energy signal; Realized and utilized the existing NFC antenna of wireless wearing equipment to charge, without additionally increasing charging inlet at wireless wearing equipment or increasing antenna and special chip, avoided taking the limited space of wireless wearing equipment.
In addition, the present invention without using special chip and agreement, only need generally receive receptible any energy signal in space when charging, is not subject to protocols limit, and charging requirement is low, and charging is convenient.And bq25504 voltage transitions chip than wireless charging chip many power management function, be relatively adapted at using on the wireless wearing equipment such as small and exquisite and the simple intelligent watch of power management request.
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 NFC antenna to a charging device for wireless wearing equipment charge, be connected with NFC antenna with the battery of wireless wearing equipment, described NFC antenna, for receiving and dispatching energy signal; It is characterized in that, described charging device comprises:
Antenna match module, for maximizing the energy signal that NFC antenna is accepted;
Rectifying and voltage-stabilizing module, for carrying out rectification and voltage stabilizing processing to the energy signal of antenna match module transmission;
Can quantity set obtain module, for being that preset charged voltage charges the battery by the voltage transitions of described energy signal;
Described NFC antenna, antenna match module, rectifying and voltage-stabilizing module, energy quantity set obtain module and are connected successively with battery.
2. the NFC antenna that utilizes according to claim 1, to the charging device of wireless wearing equipment charge, is characterized in that, described energy quantity set obtains module and comprises:
Amplitude sample unit, for amplitude and the rule of the described energy signal of sampling;
Voltage conversion unit, for being that preset charged voltage charges the battery by the voltage transitions of the energy signal of amplitude sample unit sampling;
Overvoltage setting unit, for arranging overvoltage protection threshold voltage;
Low pressure setting unit, for arranging low-voltage variation threshold voltage;
Storage boosting unit, for input voltage is carried out to energy storage, and when low-voltage is inputted, to the input voltage processing of boosting;
Be full of voltage setting unit, for battery is set, be full of the charged state of voltage and hysteresis voltage management battery;
Described amplitude sample unit, overvoltage setting unit, low pressure setting unit, store boosting unit and be full of voltage setting unit and be all connected voltage conversion unit, described amplitude sample unit is also connected antenna match module with storage boosting unit.
3. the NFC antenna that utilizes according to claim 2 is to the charging device of wireless wearing equipment charge, it is characterized in that, described antenna match module comprises: the first build-out resistor and the second build-out resistor, one end of one end of described the first build-out resistor and the second build-out resistor is all connected NFC antenna and rectifying and voltage-stabilizing module, the equal ground connection of the other end of the other end of the first build-out resistor and the second build-out resistor.
4. the NFC antenna that utilizes according to claim 3, to the charging device of wireless wearing equipment charge, is characterized in that, described rectifying and voltage-stabilizing module comprises: diode and the first electric capacity; The positive pole of described diode connects one end of described the first build-out resistor, one end of the second build-out resistor and NFC antenna, and the negative pole of diode is by storage boosting unit connection voltage conversion unit, also by the first capacity earth.
5. the NFC antenna that utilizes according to claim 4, to the charging device of wireless wearing equipment charge, is characterized in that the inductance that described storage boosting unit comprises, the second electric capacity and the 3rd appearance; Described voltage conversion unit comprises voltage transitions chip; One end of described inductance connects the negative pole of diode, and the other end of inductance connects the LBST end of voltage transitions chip; Hold with the VSTOR that the 3rd one end holding is all connected voltage transitions chip one end of described the second electric capacity, the other end of described the second electric capacity and the 3rd equal ground connection of the other end of holding; The positive pole of described battery connects the VBAT end of voltage transitions chip.
6. the NFC antenna that utilizes according to claim 5 is to the charging device of wireless wearing equipment charge, it is characterized in that, described amplitude sample unit comprises the first sampling resistor and the second sampling resistor, one end of described the first sampling resistor connects the VIN_DC end of the negative pole of diode, one end of inductance and voltage transitions chip, and the VDC_SAMP that the other end of described the first sampling resistor connects voltage transitions chip holds, also passes through the second sampling resistor ground connection.
7. the NFC antenna that utilizes according to claim 5, to the charging device of wireless wearing equipment charge, is characterized in that, described overvoltage setting unit comprises that the first overvoltage arranges resistance and the second overvoltage arranges resistance; One end that described the first overvoltage arranges resistance connects the VBAT_OV end of voltage transitions chip, also by the second overvoltage, the VRDIV end of resistance connection voltage transitions chip is set and is full of voltage setting unit, and the first overvoltage arranges the other end ground connection of resistance.
8. the NFC antenna that utilizes according to claim 7, to the charging device of wireless wearing equipment charge, is characterized in that, described low pressure setting unit comprises that the first low pressure arranges resistance and the second low pressure arranges resistance; One end that described the first low pressure arranges resistance connects the VBAT_UV end of voltage transitions chip, also by the second low pressure, the VRDIV end of resistance connection voltage transitions chip is set and is full of voltage setting unit, and the first low pressure arranges the other end ground connection of resistance.
9. the NFC antenna that utilizes according to claim 8 is to the charging device of wireless wearing equipment charge, it is characterized in that, the described voltage setting unit that is full of comprises that first is full of voltage resistance is set, second is full of voltage arranges resistance and sluggish resistance, described first is full of one end and second that voltage arranges resistance is full of the OK_PROG end that one end that voltage arranges resistance is all connected voltage transitions chip, first is full of the other end ground connection that voltage arranges resistance, described second is full of voltage arranges the OK_HYST end that the other end of resistance and one end of sluggish resistance are all connected voltage transitions chip, the other end of described sluggish resistance connects the VRDIV end of voltage transitions chip, the second overvoltage arranges one end of resistance and one end that the second low pressure arranges resistance.
10. according to the NFC antenna that utilizes described in claim 1-9 any one, give the charging device of wireless wearing equipment charge, it is characterized in that, described wireless wearing equipment is intelligent watch.
CN201410365086.8A 2014-07-29 2014-07-29 Charging unit for charging wireless wearable device with NFC (Near Field Communication) antenna Pending CN104113119A (en)

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Application publication date: 20141022