CN207994701U - A kind of energy-saving phone charger of fire prevention - Google Patents
A kind of energy-saving phone charger of fire prevention Download PDFInfo
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- CN207994701U CN207994701U CN201820209941.XU CN201820209941U CN207994701U CN 207994701 U CN207994701 U CN 207994701U CN 201820209941 U CN201820209941 U CN 201820209941U CN 207994701 U CN207994701 U CN 207994701U
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Abstract
The utility model discloses a kind of energy-saving phone charger of fire prevention, it is related to mobile phone charging technique field, it includes current-limiting circuit, charger, control circuit, adaptive power supply, input circuit, the cathode electrical connection current-limiting circuit and adaptive power supply, input circuit of charger, the anode electrical connection current-limiting circuit of charger, current-limiting circuit is electrically connected connection control circuit, and control circuit is electrically connected adaptive power supply, and adaptive power supply is electrically connected input circuit.It can improve the safety of phone charger; the service life of extending cell phone charger; it is automatically powered off at the end of charger charges, prevents there is no the waste of energy extracted charger in time and generated after charging, and when charger failure causes short circuit, overcurrent; fast automatic protection; prevent fire, simultaneously because stand-by power consumption only 5mW or so, hardly power consumption; use, therefore the use habit easy to use for also meeting people can be powered on for a long time.
Description
Technical field
The utility model is related to be related to a kind of energy-saving phone charger of fire prevention, belong to mobile phone charging technique field.
Background technology
Forget to pull out charger after charging when using phone charger or do not pulled out charger, has caused charger to be chronically at and wait for
Machine working condition consumes electricity, causes serious waste of energy (usual 100~800mW or so), while the inside member of charger
Part is in ageing state, breaks down and is easy to cause fire.And prodigious surge electricity is generated when charger being accessed power supply every time
Stream, the same aging for accelerating electronic component.Existing charger is made of low power Switching Power Supply, whole by bridge-type
Stream is supplied to Switching Power Supply to control chip after electrolytic capacitor filters.The high-frequency PWM pulse that control chip generates passes through high frequency
Transformer pressure-reducing, using being supplied to charging mobile phone battery after filtering high-frequency rectifier.
This mode has the disadvantage that：
1, after working long hours, rectifier bridge, electrolytic capacitor, Switching Power Supply control chip aging cause failure.To
Overcurrent, short circuit is caused to cause fire.Especially people do not extract even more serious when charger after traditionally having charged；
Electrolytic capacitor is accelerated aging speed by prodigious inrush current shock when 2, powering on every time；
3, it has charged when not extracting charger, has been chronically at stand-by operation state consumption electricity, caused serious electric energy wave
Take.
4, moment overvoltage capabilities are poor, lead to overcurrent once moment overvoltage occurs and easy tos produce the damage of element, cause overcurrent,
Short circuit causes fire.
Therefore it needs to invent a kind of energy-saving phone charger of fire prevention, designs a kind of micro energy lose intelligent electric simple in structure
Sub switch, access is in charger leading portion, and electronic switch is connected and charges when charging normal, and disconnects and filling automatically at the end of charging
Electric appliance, to save electric energy.The stand-by power consumption only 5mW or so of this energy-saving phone charger of fire prevention, hardly power consumption can be grown
Phase powers on, and can absorb surge current, AC current control when charging in a reasonable range, once charger event
When barrier causes short circuit, overcurrent, fast automatic disconnection, and prompt failure.
Utility model content
In view of the above-mentioned problems, the technical problem to be solved by the present invention is to provide a kind of energy-saving mobile phone chargings of fire prevention
Device.
The energy-saving phone charger of fire prevention of the utility model, it includes current-limiting circuit, charger, control circuit, adaptive
Answer power supply, input circuit, the cathode electrical connection current-limiting circuit and adaptive power supply, input circuit of charger, the anode of charger
It is electrically connected current-limiting circuit, current-limiting circuit is electrically connected connection control circuit, and control circuit is electrically connected adaptive power supply, and adaptive power supply is electrically connected
Connect input circuit.
Preferably, the input circuit is made of rectifier bridge D2,220V AC voltage is carried out by rectifier bridge D2
Rectification.
Preferably, the adaptive power supply is by resistance R2, resistance R3, voltage-stabiliser tube D3, triode Q1, capacitance C1 groups
At resistance R2 and resistance R3 are connected in parallel on triode Q1, and resistance R2, resistance R3 and voltage-stabiliser tube D3 are cascaded, voltage stabilizing
Pipe D3, capacitance C1 are connected in parallel, and triode Q1 output ends are connected with capacitance C1, and setting in this way can be straight the pulsation of rectification
After voltage-stabiliser tube D3 voltage stabilizings, 4.5V is generated by triode Q1 drivings by resistance R2, resistance R3 at the both ends capacitance C1 for galvanic electricity stream
The voltage of left and right is used for control circuit.
Preferably, the control circuit is by crystal oscillator Y1, capacitance C2, capacitance C3 and microcontroller U1, resistance R1, luminous two
Pole pipe D1, button switch S1 compositions, capacitance C2 and capacitance C3 are connected in parallel on microcontroller U1, and crystal oscillator Y1 is connected in parallel on capacitance C2 and capacitance
Between C3, the both ends of light emitting diode D1 are connected on VDO the and PB0 interfaces of microcontroller U1, and setting in this way shows charged state,
Timing can be arranged simultaneously to charge.
Preferably, the current-limiting circuit is by field-effect tube Q2, triode Q3, resistance R4, resistance R5, resistance R6, electricity
R7 compositions are hindered, field-effect tube Q2 is connected with charger, and field-effect tube Q2 is cascaded with resistance R5, resistance R4 and resistance R6
It being connected in parallel, triode Q3 is cascaded with resistance R6, and the both ends resistance R7 are electrically connected microcontroller U1 and triode Q3,
Setting can protect charging circuit to avoid damaging when short circuit occurs with the size of current on limiting circuit in this way.
Preferably, the crystal oscillator is 32KHz.
Preferably, the ports PB1 of the microcontroller U1 are connected to the control pole of the field-effect tube Q2 of current-limiting circuit, this
Sample setting microcontroller U1 can detect the operating condition of current-limiting circuit.
Preferably, the triode Q1 uses VCE>350V current amplification factors β is more than 50 triode, triode
The model 2SC2265 of Q1.
Preferably, the field-effect tube Q2 uses VDS>600V, ID>The field-effect tube of 2A, the model of field-effect tube Q2
Any one in K1198 or K1457.
The beneficial effects of the utility model：The device can improve the safety of phone charger, extending cell phone charger
Service life, when charger charge at the end of automatically power off, prevent charging after without in time extract charger and generate
Waste of energy, when charger failure cause short circuit, overcurrent when, fast automatic protection prevents fire, simultaneously because
Stand-by power consumption only 5mW or so, hardly power consumption can power on use, therefore the use easy to use for also meeting people for a long time
Custom.
Description of the drawings
The utility model is described in detail by following specific implementations and attached drawing for ease of explanation,.
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the circuit diagram of the specific implementation of the utility model.
1- current-limiting circuits；2- chargers；3- control circuits；4- adaptive power supplies；5- input circuits.
Specific implementation mode
Such as Fig. 1, shown in Fig. 2, present embodiment uses following technical scheme：It include current-limiting circuit 1, charger 2,
Control circuit 3, adaptive power supply 4, input circuit 5, the cathode electrical connection current-limiting circuit 1 of charger 2 and adaptive power supply 4, defeated
Enter circuit 5, the anode electrical connection current-limiting circuit 1 of charger 2, current-limiting circuit 1 is electrically connected connection control circuit 3, and control circuit 3 is electrically connected
Adaptive power supply 4, adaptive power supply 4 are electrically connected input circuit 5.
Wherein, the input circuit 5 is made of rectifier bridge D2, and 220V AC voltage is whole by rectifier bridge D2 progress
Stream；The adaptive power supply 4 is made of resistance R2, resistance R3, voltage-stabiliser tube D3, triode Q1, capacitance C1, resistance R2 and resistance
R3 is connected in parallel on triode Q1, and resistance R2, resistance R3 and voltage-stabiliser tube D3 are cascaded, and voltage-stabiliser tube D3, capacitance C1 are in parallel
Together, triode Q1 output ends are connected with capacitance C1, and the Rectified alternating current stream of rectification can be passed through resistance by setting in this way
R2, resistance R3 generate the voltage of 4.5V or so for control after voltage-stabiliser tube D3 voltage stabilizings, by triode Q1 drivings at the both ends capacitance C1
Circuit 3 processed uses；The control circuit 3 is by crystal oscillator Y1, capacitance C2, capacitance C3 and microcontroller U1, resistance R1, light emitting diode
D1, button switch S1 composition, capacitance C2 and capacitance C3 are connected in parallel on microcontroller U1, crystal oscillator Y1 be connected in parallel on capacitance C2 and capacitance C3 it
Between, the both ends of light emitting diode D1 are connected on VDO the and PB0 interfaces of microcontroller U1, and setting in this way shows charged state, simultaneously
Timing can be arranged to charge；The current-limiting circuit 1 is by field-effect tube Q2, triode Q3, resistance R4, resistance R5, resistance R6, electricity
R7 compositions are hindered, field-effect tube Q2 is connected with charger 2, and field-effect tube Q2 is cascaded with resistance R5, resistance R4 and resistance
R6 is connected in parallel, and triode Q3 is cascaded with resistance R6, and the both ends resistance R7 are electrically connected microcontroller U1 and triode
Q3, in this way setting can protect charging circuit to avoid damaging when short circuit occurs with the size of current on limiting circuit；It is described
Crystal oscillator be 32KHz；The ports PB1 of the microcontroller U1 are connected to the control pole of the field-effect tube Q2 of current-limiting circuit 1, in this way
Microcontroller U1, which is arranged, can detect the operating condition of current-limiting circuit 1；The triode Q1 uses VCE>350V Current amplifiers times
Number β is more than 50 triode, the model 2SC2265 of triode Q1；The field-effect tube Q2 uses VDS>600V, ID>2A
Field-effect tube, any one of the model of field-effect tube Q2 in K1198 or K1457.
The working principle of this specific embodiment:：The operating current of microcontroller U1 is 7uA or so, and while lighting D1 needs
The larger current of 0.5mA, is provided by Q1, and when charging clicks button switch S1, and then microcontroller U1 starts timing, and PB1 is become
High level field-effect tube Q2 saturation conductions provide power supply to charger 2 and start to charge up, and light emitting diode D1 is gone out with the bright 0.6S of 0.2S
Mode work (in order to reduce the burden of adaptive power supply 4), indicate to charge normal, when charging D1 extinguish, in order in low current
Lower to obtain preferable illumination effect, light emitting diode D1 uses ultra-brightness light emitting diode.
Current-limiting circuit operation principle generates the pulse current that amplitude is 0.4A by taking 10W chargers as an example, when normal work, because
The voltage at the both ends this resistance R4 is the conducting voltage 0.5V of 0.33V triodes Q3, therefore triode Q3 is not turned on, and resistance R4 is set
Set overcurrent insured's point (0.6A), short-circuit insured's point (electric current is far longer than 0.6A), the pulse when overcurrent occurs is arranged in resistance R5
Electric current is more than setting value 0.6A, then the pressure drop of resistance R4 is more than the conducting voltage 0.5V of triode Q3, therefore PB3 passes through for low level
It crosses after microcontroller U1 detection and PB1 is become low level, pulse current is far longer than 0.6A when a short circuit occurs, therefore resistance R4,
Voltage on resistance R5 becomes larger rapidly, VGSBecome smaller close to 3.7V, then output current is limited in rapidly 0.8A or so, waits for monolithic
PB1 is become low level after the detection of machine U1 and closes field-effect tube Q2, stops charging work, when overcurrent, short circuit occur for charger 2
When charger 2 pulse current be more than setting value 0.6A or more, then the pressure drop of R4 is more than the conducting voltage 0.5V of Q3, therefore PB3
PB1 is become low level after microcontroller U1 detections for low level and closes field-effect tube Q2, and the side gone out with the bright 0.2S of 0.2S
Formula work indicates that charger 2 is abnormal.
The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.
Claims (9)
1. a kind of energy-saving phone charger of fire prevention, it is characterised in that：It includes current-limiting circuit (1), charger (2), control electricity
Road (3), adaptive power supply (4), input circuit (5), the cathode electrical connection current-limiting circuit (1) and adaptive power supply of charger (2)
(4), input circuit (5), the anode electrical connection current-limiting circuit (1) of charger (2), current-limiting circuit (1) are electrically connected connection control circuit
(3), control circuit (3) electrical connection adaptive power supply (4), adaptive power supply (4) are electrically connected input circuit (5).
2. a kind of energy-saving phone charger of fire prevention according to claim 1, it is characterised in that：The input circuit
(5) it is made of rectifier bridge D2.
3. a kind of energy-saving phone charger of fire prevention according to claim 1, it is characterised in that：The adaptive power supply
(4) it is made of resistance R2, resistance R3, voltage-stabiliser tube D3, triode Q1, capacitance C1, resistance R2 and resistance R3 are connected in three poles in parallel
On pipe Q1, resistance R2, resistance R3 and voltage-stabiliser tube D3 are cascaded, and voltage-stabiliser tube D3, capacitance C1 are connected in parallel, and triode Q1 is defeated
Outlet is connected with capacitance C1.
4. a kind of energy-saving phone charger of fire prevention according to claim 1, it is characterised in that：The control circuit
(3) by crystal oscillator Y1, capacitance C2, capacitance C3 and microcontroller U1, resistance R1, light emitting diode D1, button switch S1 compositions, capacitance C2
It is connected in parallel on microcontroller U1 with capacitance C3, crystal oscillator Y1 is connected in parallel between capacitance C2 and capacitance C3, and the both ends of light emitting diode D1 connect
It is connected on VDO the and PB0 interfaces of microcontroller U1.
5. a kind of energy-saving phone charger of fire prevention according to claim 1, it is characterised in that：The current-limiting circuit
(1) it is made of field-effect tube Q2, triode Q3, resistance R4, resistance R5, resistance R6, resistance R7, field-effect tube Q2 and charger
(2) it is connected, field-effect tube Q2 is cascaded with resistance R5, and resistance R4 and resistance R6 are connected in parallel, triode Q3 and electricity
Resistance R6 is cascaded, and the both ends resistance R7 are electrically connected microcontroller U1 and triode Q3.
6. a kind of energy-saving phone charger of fire prevention according to claim 4, it is characterised in that：The crystal oscillator is
32KHz。
7. a kind of energy-saving phone charger of fire prevention according to claim 4, it is characterised in that：The microcontroller U1's
The ports PB1 are connected to the control pole of the field-effect tube Q2 of current-limiting circuit (1).
8. a kind of energy-saving phone charger of fire prevention according to claim 3, it is characterised in that：The triode Q1 makes
Use VCE>350V current amplification factors β is more than 50 triode, the model 2SC2265 of triode Q1.
9. a kind of energy-saving phone charger of fire prevention according to claim 5, it is characterised in that：The field-effect tube Q2
Use VDS>600V, ID>The field-effect tube of 2A, any one of the model of field-effect tube Q2 in K1198 or K1457.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820209941.XU CN207994701U (en) | 2018-02-07 | 2018-02-07 | A kind of energy-saving phone charger of fire prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820209941.XU CN207994701U (en) | 2018-02-07 | 2018-02-07 | A kind of energy-saving phone charger of fire prevention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207994701U true CN207994701U (en) | 2018-10-19 |
Family
ID=63823893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820209941.XU Expired - Fee Related CN207994701U (en) | 2018-02-07 | 2018-02-07 | A kind of energy-saving phone charger of fire prevention |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207994701U (en) |
-
2018
- 2018-02-07 CN CN201820209941.XU patent/CN207994701U/en not_active Expired - Fee Related
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| 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: 20181019 Termination date: 20200207 |