CN206117246U - Supply circuit of intelligence bracelet - Google Patents
Supply circuit of intelligence bracelet Download PDFInfo
- Publication number
- CN206117246U CN206117246U CN201621162491.0U CN201621162491U CN206117246U CN 206117246 U CN206117246 U CN 206117246U CN 201621162491 U CN201621162491 U CN 201621162491U CN 206117246 U CN206117246 U CN 206117246U
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- China
- Prior art keywords
- pin
- charging
- connects
- ltc4053
- circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The embodiment of the utility model provides a supply circuit of intelligence bracelet, including chargeable call, power module and the module of charging, the module of charging includes charge management sub circuit and USB interface sub circuit, the USB interface sub circuit passes through the sub - circuit connection of charge management chargeable call, does the charge management sub circuit include LTC4053 4.2 charge management chip, power module is including going up and down to press conversion chip TPS63001.
Description
Technical field
This utility model belongs to electronic technology field, more particularly to a kind of power supply circuits of Intelligent bracelet.
Background technology
With the development of technology, various wearable devices gradually start popularization, and wherein Intelligent bracelet is always one
Plant modal wearable device.Existing all that to be realized of Intelligent bracelet functions are all necessarily dependent upon supply of electric power, and
Various functions in Intelligent bracelet are generally required for being realized by various chips, therefore reliable and stable power supply may insure intelligence
Bracelet steady operation and life-span of various chips can be improved.It is because Intelligent bracelet belongs to Wearable therefore its miniaturization, light
Quantization is equally a critically important parameter.
Existing Intelligent bracelet manufacturer is generally all provided with power supply circuits in Intelligent bracelet, and wherein power supply circuits include supplying
Electric module and charging module；Wherein supply module is used to realize that electric power is stored and supplied that charging module to be used to be carried for supply module
For quick charge.Existing Intelligent bracelet manufacturer is in the urgent need to the good and small-sized power supply circuits of performance.
Utility model content
For lacking the problem using the power supply circuits rational in infrastructure in Intelligent bracelet present in prior art, this
The utility model technical problem to be solved is to provide a kind of power supply circuits of Intelligent bracelet, can pass through the power supply mould of power supply circuits
Block and charging module realize stable power-supplying and quick charge.
In order to solve the above problems, this utility model embodiment proposes a kind of power supply circuits of Intelligent bracelet, including can
Rechargeable battery BT1, supply module and charging module；Wherein,
The charging module includes Charge Management electronic circuit and USB interface electronic circuit, and the USB interface electronic circuit is by filling
Fulgurite reason electronic circuit connects the rechargeable battery BT1；The Charge Management electronic circuit includes LTC4053-4.2 Charge Management cores
Piece, the second pin VCC connection USB interface electronic circuits of the electric current input of the LTC4053-4.2 charging management chips, the 9th pipe
Foot BAT connects the rechargeable battery BT1；And the LTC4053-4.2 charging management chips for determining negative temperature coefficient
The 6th pin NTC ground connection GND, the 7th pin PROG of the LTC4053-4.2 charging management chips is connected to determination and fills
The outer meeting resistance R16 of circuit, the 4th pin TIMER of the LTC4053-4.2 charging management chips is connected to determination and fills
The first electric capacity C8 of electric time；Wherein described USB interface electronic circuit includes USB interface chip CN1, the of USB interface chip CN1
One pin VBUS connects the second pin VCC of the electric current input of the LTC4053-4.2 charging management chips, and electric by second
Hold C7 ground connection GND；
The supply module includes buck conversion chip TPS63001, the of the buck conversion chip TPS63001
One pin VIN connects input voltage VBAT (1.8-5V) by filter capacitor C1；Second pin VINA connection supply voltage controls
Signal input circuit；Three-prong SYNCPS connects battery saving mode control signal input circuit；4th pin EN connection equipment makes
Can signal input circuit；9th pin FB is chip internal voltage error amplifier, connects feedback signal input circuit；Tenth pipe
Foot yOUT connects voltage follower circuit；Be provided between 0th pin L1 and the 11st pin L11 for eliminate inductive current every
From inductance L1.
Wherein, data pins D+ and D- of the USB interface chip CN1 connect power supply by resistance R12 and R12 respectively
First pin VBUS, and respectively by resistance R14 and R15 ground connection.
Wherein, the resistance of the outer meeting resistance R16 of the 7th pin PROG connections of the LTC4053-4.2 charging management chips
For 15K Ω.
Wherein, the rechargeable battery BAT1 is the charged lithium cells of SUN 452535.
Wherein, the output voltage of the supply module is 3.3V；The inductance value of the isolation inductance L1 is 2.2 μ H.
Above-mentioned technical proposal of the present utility model has the beneficial effect that：This utility model embodiment proposes a kind of intelligence
The power supply circuits of bracelet, by supply module and charging module reasonable in design stable power-supplying and efficiently charging are realized；It is stable to supply
Electricity is able to ensure that each chip steady operation of Intelligent bracelet and increases the service life；When efficiently charging is able to ensure that shortening is charged
Between.
Description of the drawings
Fig. 1 is the circuit diagram of the charging module of the power supply circuits of this utility model embodiment；
Fig. 2 is the circuit diagram of the supply module of the power supply circuits of this utility model embodiment.
Specific embodiment
To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And specific embodiment is described in detail.
This utility model embodiment proposes a kind of power supply circuits of Intelligent bracelet, including charging module as shown in Figure 1
With supply module as shown in Figure 2, also including rechargeable battery BT1.
In one embodiment of the present utility model, rechargeable battery BT1 selects the charged lithium cells of SUN 452535；It fills
Piezoelectric voltage is 4.2V, and normal input voltage is 3.7V, and it is charged using USB interface.
As shown in Figure 1, the VBUS input voltages of the charging module USB are 5V, and USB charging management chips are Linear
The charging management chip LTC4053-4.2 of company, its input voltage is accessed from the second pin Pin 2 (VCC), exports charging voltage
From the 9th pin Pin 9 (BAT) outputs；Its output voltage is generally 4.2V～5V；Output current IBATBy the 7th pin Pin 7
(PROG) the outer meeting resistance R16 of connection is determined, wherein the 7th pin PROG is charging current and charging current monitoring program pin.
Explain as an example, wherein outer meeting resistance R16 (also referred to as RPROG) resistance can be calculated by below equation：
ICHG=(IPROG) × 1000=(1.5V/RPROG)×1000
RPROG=1500V/ICHG
Wherein, RPROG as connects the resistance R16 of the 7th pin PROG, if the charging current that sets of charging module as
100mA, can obtain RPROGFor 15K Ω.
Wherein the 6th pin Pin 6 (NTC) be negative temperature coefficient, zero setting in this utility model embodiment.5th pin Pin
5 (GND) are chip ground pin, are grounded GND.4th pin Pin 4 (TIMER) is to set pin, charging interval in the charging interval
Determined by the size of the first external electric capacity C8 of the 4th pin TIMER pins.Explain as an example, the meter of first electric capacity C8
Calculate formula as follows：
Timer (Hours)=(3Hours) × (CTIMER/0.1μF)
Thus first electric capacity C8 (the also referred to as C of the 4th pin TIMER can be calculatedTIMER) below equation meter can be passed through
Calculate：
CTIMER=0.1 μ F × Time (Hours)/3 (Hours)
The predetermined charging interval is assumed for 3 hours, the first electric capacity C8 (also referred to as C can be obtained by formulaTIMER) it is 0.1 μ F.
As shown in Figure 2, the output voltage of supply module is 3.3V ± 0.5%, and output current is 1200mA.Supply module
Including buck conversion chip TPS63001, the first pin VIN of the buck conversion chip TPS63001 passes through filtered electrical
Hold C1 connections input voltage VBAT (1.8-5V)；Second pin VINA connects supply voltage control signal input circuit；3rd pipe
Foot SYNCPS connects battery saving mode control signal input circuit；4th pin EN connection equipment enables signal input circuit；9th
Pin FB is chip internal voltage error amplifier, connects feedback signal input circuit；Tenth pin yOUT connects voltage output
Circuit；The isolation inductance L1 for eliminating inductive current is provided between 0th pin L1 and the 11st pin L11.
Explain as an example, the pin output valve of the 0th pin L1 and the 11st pin L11 can pass through below equation
Calculate：
LL1=(Vo(V1-Vo))/(0.3V1f)
LL2=(V2(Vo-V2))/(0.3V2f)
Wherein, LL1、LL2Respectively decompression mode output minimum inductance value exports minimum inductance value, V with boost mode1、V2
Respectively decompression mode input minimum amount of voltage that and boost mode are input into minimum amount of voltage that；VoFor voltage output value, f is opened for minimum
Close frequency.
As shown in Figure 2, wherein the isolation inductance L1 values connected between the 0th pin L1 and the 11st pin L2 exist
Between LL1, LL2.
In an embodiment of the present utility model, the output voltage of supply module design is 3.3V；It is best to obtain
Control effect, it is 2.2 μ H that present embodiment selects the inductance value of isolation inductance L1, using as the 0th pin Pin 0 and the tenth
Isolation inductance between one pin Pin 11.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from principle described in the utility model, some improvements and modifications can also be made, these improvement
Protection domain of the present utility model is also should be regarded as with retouching.
Claims (5)
1. a kind of power supply circuits of Intelligent bracelet, it is characterised in that including rechargeable battery, supply module and charging module；Its
In,
The charging module includes Charge Management electronic circuit and USB interface electronic circuit, and the USB interface electronic circuit passes through charging valve
Reason electronic circuit connects the rechargeable battery；The Charge Management electronic circuit includes LTC4053-4.2 charging management chips, described
The second pin connection USB interface electronic circuit of the electric current input of LTC4053-4.2 charging management chips, the 9th pin connection is described
Rechargeable battery；And the 6th pin for determining negative temperature coefficient of the LTC4053-4.2 charging management chips is grounded, institute
The 7th pin for stating LTC4053-4.2 charging management chips is connected to determine the outer meeting resistance of charging circuit, described
4th pin of LTC4053-4.2 charging management chips is connected to determine first electric capacity in charging interval；Wherein described USB connects
Openning circuit includes USB interface chip, and the first pin of USB interface chip connects the LTC4053-4.2 charging management chips
Electric current input the second pin, and by the second capacity earth；
The supply module includes buck conversion chip TPS63001, the first pipe of the buck conversion chip TPS63001
Foot connects input voltage by filter capacitor；Second pin connects supply voltage control signal input circuit；Three-prong connects
Battery saving mode control signal input circuit；4th pin connection equipment enables signal input circuit；9th pin is chip internal
Voltage error amplifier, connects feedback signal input circuit；Tenth pin connects voltage follower circuit；0th pin and the 11st
The isolation inductance for eliminating inductive current is provided between pin.
2. power supply circuits of Intelligent bracelet according to claim 1, it is characterised in that two of the USB interface chip
Data pins connect respectively the first pin of power supply by resistance, and pass through resistance eutral grounding respectively.
3. power supply circuits of Intelligent bracelet according to claim 1, it is characterised in that the LTC4053-4.2 charging valves
The resistance of the outer meeting resistance of the 7th pin connection of reason chip is 15K Ω.
4. power supply circuits of Intelligent bracelet according to claim 1, it is characterised in that the rechargeable battery is SUN
452535 charged lithium cells.
5. power supply circuits of Intelligent bracelet according to claim 1, it is characterised in that the output voltage of the supply module
For 3.3V；The inductance value of the isolation inductance is 2.2 μ H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621162491.0U CN206117246U (en) | 2016-10-25 | 2016-10-25 | Supply circuit of intelligence bracelet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621162491.0U CN206117246U (en) | 2016-10-25 | 2016-10-25 | Supply circuit of intelligence bracelet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206117246U true CN206117246U (en) | 2017-04-19 |
Family
ID=58526737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621162491.0U Expired - Fee Related CN206117246U (en) | 2016-10-25 | 2016-10-25 | Supply circuit of intelligence bracelet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206117246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911163A (en) * | 2017-04-27 | 2017-06-30 | 广东乐源数字技术有限公司 | A kind of anti-reverse charging charging circuit of Intelligent bracelet |
-
2016
- 2016-10-25 CN CN201621162491.0U patent/CN206117246U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911163A (en) * | 2017-04-27 | 2017-06-30 | 广东乐源数字技术有限公司 | A kind of anti-reverse charging charging circuit of Intelligent bracelet |
| WO2018196460A1 (en) * | 2017-04-27 | 2018-11-01 | 广东乐源数字技术有限公司 | Anti-reverse charging circuit of smart bracelet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170419 Termination date: 20201025 |