CN204243834U - A kind of charging circuit of ZigBee terminal equipment - Google Patents
A kind of charging circuit of ZigBee terminal equipment Download PDFInfo
- Publication number
- CN204243834U CN204243834U CN201420775590.0U CN201420775590U CN204243834U CN 204243834 U CN204243834 U CN 204243834U CN 201420775590 U CN201420775590 U CN 201420775590U CN 204243834 U CN204243834 U CN 204243834U
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- chip
- power supply
- control chip
- port
- charging
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Abstract
The utility model discloses a kind of circuit, the charging circuit of a kind of ZigBee terminal equipment of tool, this circuit comprises TP4056 control chip, this chip is connected with chargeable lithium cell, 5V DC power supply, charge status indicating light, charging complete status indicator lamp, constant current charge current setting resistance, power supply selection toggle switch, and described power supply is selected toggle switch also to connect supply voltage and regulated chip.The utility model adopts TP4056 chip as the control chip of chargeable lithium cell; the power transistor of this chip internal is utilized to carry out pattern charging stage by stage to lithium battery; the lithium battery adopted can be used by iterative cycles by charging, solves terminal equipment in ZigBee-network product and is unfavorable for the problem of environmental protection because using dry cell.
Description
Technical field
The utility model relates to a kind of circuit, specifically a kind of charging circuit of ZigBee terminal equipment.
Background technology
Along with the develop rapidly of Internet of Things industry, the application product of ZigBee-network also gets more and more, and also brings some problems accordingly thereupon, and wherein the powerup issue of ZigBee-network terminal equipment is exactly instantly need to solve.
At present, the ZigBee-network terminal equipment on market all uses two joints No. 5 dry cell power supplies, and dry cell service time there will be under-voltage phenomenon once long, needs often to change battery, and one is that cost is large, two protections being also unfavorable for environment.
Summary of the invention
The purpose of this utility model is the defect in order to overcome in background technology, propose a kind of charging circuit of ZigBee terminal equipment, this circuit can be used for, in ZigBee-network terminal equipment, achieving the power supply to terminal equipment, ensure that terminal equipment normally works, reduce cost.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of charging circuit of ZigBee terminal equipment, this circuit comprises chargeable lithium cell and 5V DC power supply, it is characterized in that, also comprise TP4056 control chip, charge status indicating light, charging complete status indicator lamp, constant current charge current setting resistance, power supply selection toggle switch and supply voltage and regulate chip; With TP4056 control chip for control core, the VCC port of this chip is all connected 5V DC power supply with CE port, the GND port ground connection of this chip; The input of described charge status indicating light is connected with 5V DC power supply, its output connection TP4056 control chip
port; The input of described charging complete status indicator lamp is connected with 5V DC power supply, its output and TP4056 control chip
port connects; The positive pole of described chargeable lithium cell connects the BAT port of TP4056 control chip, its minus earth; Described constant current charge current setting resistance one end connects the PROG port of TP4056 control chip, its other end ground connection; Described power supply selects the input of toggle switch to connect the BAT port of 5V DC power supply and TP4056 control chip respectively, and its output connects supply voltage and regulates chip.
Preferred: described charge status indicating light adopts red LED indicator light.
Preferred: described charging complete status indicator lamp adopts green LED indicator light.
Preferred: the resistance of described constant current charge current setting resistance is 2300 Ω.
The beneficial effects of the utility model are: this circuit adopts TP4056 chip as the control chip of chargeable lithium cell; the power transistor of this chip internal is utilized to carry out pattern charging stage by stage to lithium battery; the lithium battery adopted can be used by iterative cycles by charging, and this circuit solves terminal equipment in ZigBee-network product and is unfavorable for the problem of environmental protection because using dry cell.
Accompanying drawing explanation
Fig. 1, composition frame chart of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and preferred scheme, embodiment of the present utility model is described in further detail.
As shown in Figure 1, it is composition frame chart of the present utility model, a specifically charging circuit for ZigBee terminal equipment, this circuit comprises TP4056 control chip 1,5V DC power supply 2, charge status indicating light 3, charging complete status indicator lamp 4, chargeable lithium cell 5, constant current charge current setting resistance 6, power supply selection toggle switch 7 and supply voltage and regulates chip 8; With TP4056 control chip 1 for control core, the VCC port of this chip is all connected 5V DC power supply 2 with CE port; The input of described charge status indicating light 3 is connected with 5V DC power supply 2, its output connection TP4056 control chip 1
port; The input of described charging complete status indicator lamp 4 is connected with 5V DC power supply 2, its output and TP4056 control chip 1
port connects; The positive pole of described chargeable lithium cell 5 connects the BAT port of TP4056 control chip 1, its minus earth; Described constant current charge current setting resistance 6 one end connects the PROG port of TP4056 control chip 1, its other end ground connection; Described power supply selects the input of toggle switch 7 to connect the BAT port of 5V DC power supply 2 and TP4056 control chip 1 respectively, and its output connects supply voltage and regulates chip 8.
Embodiment: the charge status indicating light 3 in the present embodiment adopts red LED indicator light; Described charging complete status indicator lamp 4 adopts green LED indicator light, and the resistance of described constant current charge current setting resistance 6 is 2.3 K Ω (2300 Ω).
Operation principle is as follows: this circuit uses 5V DC power supply 2 pairs of TP4056 control chips 1 to power, when the VCC of TP4056 control chip 1 holds input voltage to be greater than power supply low voltage test threshold value, and the enable input CE of this chip is when connecing high level, TP4056 control chip 1 just can have been charged to chargeable lithium cell 5 by BAT port, wherein, the TEMP port direct ground connection expression of TP4056 control chip 1 does not have the function of enable monitoring chargeable lithium cell 5 temperature.TP4056 control chip 1 comprises the state indication output end that two open-drain export, and is charged state indication end respectively
with charging complete state indication output end
, during charging
pin output low level makes red LED indicator light light, and represents that charging is carried out; If the voltage of chargeable lithium cell 5 first carries out precharge with small area analysis to chargeable lithium cell 5 lower than 3V, TP4056 control chip 1; When chargeable lithium cell 5 voltage is more than 3V, TP4056 control chip 1 adopts constant current mode to charge to battery again, charging current is determined by the constant current charge current setting resistance 6 between PROG pin and GND, the resistance of this circuit constant current charge current setting resistance 6 is 2300 Ω, so now use 520mA to carry out constant current charge to chargeable lithium cell 5; When cell voltage is close to 4.2V voltage, charging current reduces gradually, and TP4056 control chip 1 enters constant voltage charge pattern; When charging current is reduced to charging end threshold value, charge cycle terminates,
end exports high-impedance state makes charging red LED indicator light extinguish,
end exports electronegative potential, and charging complete green LED indicator light is lighted, and represents charging complete, and it is 10% of constant current charge electric current that charging terminates threshold value.
The high-precision voltage reference source of TP4056 control chip 1 inside that the utility model adopts, error amplifier and resistance pressure-dividing network can guarantee that the precision of battery-end modulation voltage is within 1%, meets the charging requirement of chargeable lithium cell 5.When the VCC of TP4056 control chip 1 holds voltage lower than chargeable lithium cell 5 of input voltage power down or input voltage, TP4056 control chip 1 enters the sleep pattern of low-power consumption, the electric current of chargeable lithium cell 5 end consumption is less than 3uA, thus adds stand-by time; The management circuit of this chip internal reduces charging current automatically when the junction temperature of chip is more than 145 DEG C simultaneously, this function can make user utilize the power handling capability of chip to greatest extent, does not worry chip overheating and defective chip or external component.
Described power supply selects the function of toggle switch 7 to be for selecting to be that 5V DC power supply 2 or chargeable lithium cell 5 pairs of supply voltages regulate chip 8 to power, supply voltage regulates chip 8 to be that a supply voltage linearly regulates chip, for supply voltage being adjusted to stable 3.3V direct voltage output for late-class circuit.
Circuit of the present utility model meets the instructions for use of chargeable lithium cell, have employed can iterative cycles use lithium battery to the power terminal equipment in ZigBee-network, instead of dry cell power supply, advantageously in environmental protection.
Claims (4)
1. the charging circuit of a ZigBee terminal equipment, this circuit comprises chargeable lithium cell (5) and 5V DC power supply (2), it is characterized in that: also comprise TP4056 control chip (1), charge status indicating light (3), charging complete status indicator lamp (4), constant current charge current setting resistance (6), power supply selection toggle switch (7) and supply voltage and regulate chip (8); With TP4056 control chip (1) for control core, VCC port and the CE port of this chip are all connected 5V DC power supply (2), the GND port ground connection of this chip; The input of described charge status indicating light (3) is connected with 5V DC power supply (2), its output connection TP4056 control chip
port; The input of described charging complete status indicator lamp (4) is connected with 5V DC power supply (2), its output and TP4056 control chip
port connects; The positive pole of described chargeable lithium cell (5) connects the BAT port of TP4056 control chip, its minus earth; Described constant current charge current setting resistance (6) one end connects the PROG port of TP4056 control chip, its other end ground connection; Described power supply selects the input of toggle switch (7) to connect the BAT port of 5V DC power supply and TP4056 control chip respectively, and its output connects supply voltage and regulates chip (8).
2. the charging circuit of ZigBee terminal equipment according to claim 1, is characterized in that: described charge status indicating light (3) adopts red LED indicator light.
3. the charging circuit of ZigBee terminal equipment according to claim 1, is characterized in that: described charging complete status indicator lamp (4) adopts green LED indicator light.
4. the charging circuit of ZigBee terminal equipment according to claim 1, is characterized in that: the resistance of described constant current charge current setting resistance (6) is 2300 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775590.0U CN204243834U (en) | 2014-12-11 | 2014-12-11 | A kind of charging circuit of ZigBee terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775590.0U CN204243834U (en) | 2014-12-11 | 2014-12-11 | A kind of charging circuit of ZigBee terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204243834U true CN204243834U (en) | 2015-04-01 |
Family
ID=52773279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420775590.0U Expired - Fee Related CN204243834U (en) | 2014-12-11 | 2014-12-11 | A kind of charging circuit of ZigBee terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204243834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019071551A1 (en) * | 2017-10-13 | 2019-04-18 | 深圳传音通讯有限公司 | Smart terminal charging circuit and smart terminal having said circuit |
-
2014
- 2014-12-11 CN CN201420775590.0U patent/CN204243834U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019071551A1 (en) * | 2017-10-13 | 2019-04-18 | 深圳传音通讯有限公司 | Smart terminal charging circuit and smart terminal having said circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20181211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |