CN110165741A - A kind of digital product charging alarm control circuit - Google Patents
A kind of digital product charging alarm control circuit Download PDFInfo
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- CN110165741A CN110165741A CN201910476843.1A CN201910476843A CN110165741A CN 110165741 A CN110165741 A CN 110165741A CN 201910476843 A CN201910476843 A CN 201910476843A CN 110165741 A CN110165741 A CN 110165741A
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Abstract
The invention discloses a kind of digital product charging alarm control circuits, micro-control unit is received or is provided wireless signal by wireless module, micro-control unit carries out the alarm of buzzer SP1 by control buzzer drive circuit, micro-control unit receives the temperature signal at voltage signal and charging external equipment head that external power supply feedback comes by external temperature detection circuit and external temperature detection circuit, micro-control unit, which charges by the Detection & Controling that current detecting and control circuit carry out electric current to output port and controlled signal, feeds back to micro-control unit, power management IC circuit powers to micro-control unit and output port by making it control external power supply circuit with micro-control unit cooperation, belong to charging alarm control circuit technical field, the present invention has the function to charging head overcurrent-overvoltage overheat protector.
Description
Technical field
The present invention relates to a kind of charging alarm control circuits, more particularly to a kind of digital product charging controlling alarm electricity
Road belongs to charging alarm control circuit technical field.
Background technique
Charger is to adjust charging technique with advanced Intelligent Dynamic, power frequency machine is to pass using high frequency electric source technology
For the analog circuit principle of system come what is designed, machine internal power device (such as transformer, inductance, capacitor) is all bigger, and one
As there is smaller noise when band carries larger operation, but type resistance performance in severe power grid environment condition is stronger, can
It is stronger than High-frequency machine by property and stability.
It is seldom for the protection of charger now, it often has caused by digital product overheats over-voltage because of charging process and damages
Bad digital product spontaneous combustion problems, it is therefore desirable to it is a kind of with the circuit for playing charging controlling alarm to digital product, realize logarithm
Protective action in code product charging process.
Summary of the invention
The main object of the present invention is to provide for a kind of digital product charging alarm control circuit, has to charging head mistake
Flow through the function of pressure overheat protector.
The purpose of the present invention can reach by using following technical solution:
A kind of digital product charges alarm control circuit, including micro-control unit, buzzer drive circuit, wireless module,
External power supply voltage detecting circuit, external temperature detection circuit, power management IC circuit, external power supply circuit, current detecting and
Control circuit and output port, which is characterized in that micro-control unit: for charge control, deployment control, controlling alarm and state
Display；
Buzzer drive circuit: when alarming, driving buzzer issues sharp alarm and plays driving buzzer
The effect of warning reminding；
Wireless module: play the role of wireless receiving；
External power supply voltage detecting circuit: for detecting the height of external voltage, when external voltage is excessively high, pass through micro-control
External charge circuit is cut off in the control of unit processed；
External temperature detection circuit: temperature height when for detecting charging at charging external equipment head works as external equipment
At charging head when the temperature is excessively high, the electric current of this port is cut off by micro-control unit；
Power management IC circuit: the electricity flow and flow direction for controlling external power supply circuit output are to cooperate microcontroller
The control of unit needs；
External power supply circuit: for being supplied to the stable voltage of micro-control unit；
Current detecting and control circuit: it plays when being charged by the first output port to the Detection & Controling charging of electric current
Effect；
Micro-control unit is received or is provided wireless signal by wireless module, and micro-control unit passes through control buzzer
Driving circuit carries out the alarm of buzzer SP1, and micro-control unit passes through external temperature detection circuit and external temperature detection circuit
The temperature signal at the voltage signal and charging external equipment head that external power supply feedback comes is received, micro-control unit passes through
The Detection & Controling that current detecting and control circuit carry out electric current to output port, which charge and controlled signal, feeds back to micro-control
Unit processed, power management IC circuit by with micro-control unit cooperation make its control external power supply circuit to micro-control unit and
Output port power supply.
Preferably, P1.0, P1.1, P1.2, P1.3, P1.4 and P1.5 are all set as ADC interface end in micro-control unit,
P1.0, P1.1 and P1.2 respectively in the first current detecting and control circuit AD1 interface end, the second current detecting and control electricity
AD2 interface end in road is connected with the AD3 interface end in third current detecting and control circuit, and P1.3 and external power supply voltage are examined
Detector-DC interface end connection in slowdown monitoring circuit, P1.4 are connect by conducting wire with the cathode of light emitting diode D1, light-emitting diodes
The anode of pipe D1 is connect by conducting wire with the one end resistance R17, and the resistance R17 other end is passed through by wire connecting power VCC, P1.5
Conducting wire is connect with one end resistance R9 in buzzer drive circuit, in micro-control unit P1.6 and P1.7 be all set as XTAL ADC connect
Mouthful end, P1.6 are connect with the PT1 terminals of MICRO USB in the first current detecting and control circuit, wherein MICRO USB 6,
7,8 and 9 wiring terminate, and P1.7 is connect with the PT2 terminals of MICRO USB in the second current detecting and control circuit, wherein
6,7,8 and 9 wiring of MICRO USB terminate, and P5.4 is set as RST interface end in micro-control unit, and P5.4 and port LED are shown
RED2 terminals in circuit connect, the BLUE2 terminals in micro-control unit in P5.5 interface end and port LED display circuit
It connects, P3.2 and P3.3 is all set as INT interface end, the RED1 wiring in P3.2 and port LED display circuit in micro-control unit
End connection, P3.3 are connect with the BLUE1 terminals in the LED display circuit of port, and the VCC interface end in micro-control unit is by leading
Line is parallel with resistance R5 and capacitor C7, and the other end of another terminal grounding resistance R5 of capacitor C7 is connect with power supply VCC, microcontroller list
GND interface end in member is grounded, and P3.0 is set as RXD interface end P3.1 and is set as TXD interface end, P3.0 and software in micro-control unit
3 interfaces connect in download port JP2, and P3.1 is connected to 4 interfaces and resistance R12 in the JP2 of software download port, and resistance R12 is another
One is terminated with one end of 3 interfaces of linked switch SW1,4 interfaces of linked switch SW and resistance R14, the other end of resistance R14 with
Power supply VCC connection, 1 interface of linked switch SW1 and 2 interfaces of linked switch SW simultaneously connect ground, 1 in the JP2 of software download port
Interface connects power supply VCC, 2 interfaces ground connection in the JP2 of software download port, and P2.2 and P2.3 is respectively with the in micro-control unit
S1CONB with S1CONA interface connects in one current detecting and control circuit, and P2.4 and P2.5 is respectively in micro-control unit
S2CONB with S2CONA interface connects in two current detectings and control circuit, and P2.6 and P2.7 is respectively in micro-control unit
S3CONB with S3CONA interface connects in three current detectings and control circuit, P2.1, P2.0 in micro-control unit, P3.7,
P3.6, P3.5 and P3.4 respectively with 3 port CE, 4 port CS, 5 port SCK, 6 port MOSI, 7 ports in wireless module XN1
MISO and 8 port IRQ connections, 1 port parallel connection, one group of resistance R4 and capacitor C6 in wireless module XN1, the resistance R4 other end and electricity
Source VCC connection, the capacitor C6 other end connect ground connection with wireless module XN1.
Preferably, port LED display circuit includes first port LED display circuit and second port LED display circuit, and
It is in series with resistance R31 with the RED1 connecting of P3.2 in micro-control unit in Single port LED display circuit, and resistance R31's is another
End is connect with the base stage 1 of triode Q8, and the emitter 2 of triode Q8 is grounded, the collector 3 of triode Q8 and the yin of diode D8
Pole connection, diode D8 anode are connected with resistance R22, the other end of resistance R22 be set as the end LED R1 and with the first current detecting
And 3 terminals of MICRO USB connect in control circuit, connect in the LED display circuit of port with P3.3 in micro-control unit
BLUE1 is in series with resistance R34, and the other end of resistance R34 is connect with the base stage 1 of triode Q10, and the emitter 2 of triode Q10 connects
Ground, the collector 3 of triode Q10 are in series with resistance R23, the other end of resistance R23 be set as LED B1 and with the first current detecting
And 2 terminals of MICRO USB connect in control circuit, connect in second port LED display circuit with P5.4 in micro-control unit
The RED2 connect is in series with resistance R32, and the other end of resistance R32 is connect with the base stage 1 of triode Q9, the emitter 2 of triode Q9
Ground connection, the collector 3 of triode Q9 are connect with the cathode of diode D9, and diode D9 anode is connected with resistance R33, resistance R33
The other end be set as the end LED R2 and connect with 3 terminals of MICRO USB in the second current detecting and control circuit, port
Resistance R35, the other end of resistance R35 and three poles are in series with the BLUE2 connecting of P5.5 in micro-control unit in LED display circuit
The base stage 1 of pipe Q11 connects, and the emitter 2 of triode Q11 is grounded, and the collector 3 of triode Q11 is in series with resistance R36, resistance
The other end of R36 is set as LED B2 and connect with 2 terminals of MICRO USB in the second current detecting and control circuit.
Preferably, the other end and triode for the resistance R9 being connect in buzzer drive circuit with P1.5 in micro-control unit
The base stage 1 of Q2 connects, and the emitter 2 of triode Q2 is grounded, the collector 3 of triode Q2 be connected to 2 terminals of buzzer SP1,
2 terminals of T1 and one end of capacitor C10,1 terminals of buzzer are in series with capacitor C11, and the other end of C11 is grounded, and the 3 of T1
1 terminals of the connection of 1 terminals of terminals and buzzer, T1 are connect by conducting wire with VBAT, another termination of capacitor C10
Ground.
Preferably, current detecting and control circuit include the first current detecting and control circuit and the second current detecting and control
Circuit processed is in series with resistance with one end of the S1CONA connecting of P2.3 in micro-control unit in first current detecting and control circuit
The other end of R15, resistance R15 are connect with grid in field effect transistor Q1, and the source electrode in field effect transistor Q1 is connected to two poles
The cathode of anode, capacitor C12 and the resistance R16 of pipe D5, diode D5 and another termination of capacitor C12 and the one end resistance R18 connect
It connects and is grounded, the other end and transient voltage of drain electrode, resistance R16 in field effect transistor Q1 inhibit the one end diode TVS1 all
It is connect with 5 terminals of MICRO USB in the first current detecting and control circuit, transient voltage inhibits the diode TVS1 other end
Ground connection, and 5 terminals of MICRO USB are connected with the leakage of field effect transistor Q3 again in the first current detecting and control circuit
The source electrode of pole, field effect transistor Q3 is connect with the drain electrode of the other end of resistance R18 and field effect transistor Q4, and field-effect is brilliant
The grid of body pipe Q3 is connect with one end of resistance R20, and the source electrode of field effect transistor Q4 is connect with the one end resistance R38, and the company
Meeting place is P1 point, and the grid of field effect transistor Q4 is connect with one end of resistance R21, and the resistance R21 other end is another with resistance R20's
One end connection, and the tie point is that S1CONB is connect with P2.3 in micro-control unit, the other end of resistance R38 is connected with capacitor
The other end of C15, capacitor C15 are grounded, and resistance R38 connect for AD1 with P1.0 in micro-control unit with capacitor C15 tie point,
1 connection jaws of MICRO USB export 5V DC voltage, the second current detecting and control electricity in first current detecting and control circuit
One end of the S2CONA of P2.5 connection is in series with resistance R26, the other end of resistance R26 and field-effect in Lu Zhongyu micro-control unit
Grid connects in transistor Q5, and the source electrode in field effect transistor Q5 is connected to the anode of diode D7, capacitor C14 and resistance R27,
Another termination and the one end resistance R28 connect and ground of the cathode of diode D7 and capacitor C14, the leakage in field effect transistor Q5
Pole, the other end of resistance R27 and transient voltage inhibit the one end diode TVS2 all and in the second current detecting and control circuit
5 terminals of MICRO USB connect, and transient voltage inhibits diode TVS2 other end ground connection, and the second current detecting and control
5 terminals of MICRO USB are connected with the drain electrode of field effect transistor Q6, the source electrode and electricity of field effect transistor Q6 again in circuit
Hinder the drain electrode connection of the other end and field effect transistor Q7 of R28, the grid of field effect transistor Q6 and one end of resistance R29
Connection, the source electrode of field effect transistor Q7 are connect with the one end resistance R37, and the junction is P2 point, field effect transistor Q7's
Grid is connect with one end of resistance R30, and the resistance R30 other end is connect with the other end of resistance R29, and the tie point is S2
CONB is connect with P2.4 in micro-control unit, and the other end of resistance R37 is connected with capacitor C16, and the other end of capacitor C16 is grounded,
And resistance R37 connect for AD2 with P1.1 in micro-control unit with capacitor C16 tie point, in the second current detecting and control circuit
1 connection jaws of MICRO USB export 5V DC voltage.
Preferably, external temperature detection circuit includes first port temperature sensing circuit and second port temperature detection electricity
Road, the PT1 wiring point in first port temperature sensing circuit connect with P1.6 in micro-control unit and are connected with capacitor C8, resistance
R10, thermistor PT1 and resistance R13, resistance R13, capacitor C8 and the resistance R10 other end are connected with each other and are grounded, thermistor
By connecting with upper resistance R7, the upper resistance R7 other end connects to power supply the PT1 other end, thermistor PT1 and upper electricity
The resistance junction R7 is set as PT1A wiring point, which connects with 4 of MICRO USB in the first current detecting and control circuit
Line mouth connects, and the PT2 wiring point in second port temperature sensing circuit connect with P1.7 in micro-control unit and is connected with capacitor
C13, resistance R24, thermistor PT2 and resistance R25, resistance R25, capacitor C13 and the resistance R24 other end are connected with each other and connect
Ground, by connecting with upper resistance R11, the upper resistance R11 other end connects to power supply the thermistor PT2 other end, temperature-sensitive electricity
Resistance PT2 and the junction upper resistance R11 are set as PT2A wiring point, in the PT2A wiring point and the second current detecting and control circuit
4 connection jaws of MICRO USB connect.
Preferably, external power supply voltage detecting circuit and the Detector-DC's connecting of P1.3 in micro-control unit is another
End is connected with resistance R6 and resistance R8, the other end ground connection of resistance R8, and the other end of resistance R6 is connect with one end of resistance R3, electricity
The other end output voltage of R3 is hindered, and the other end of resistance R3 is connected with the anode of capacitor C5, polar capacitor C4, capacitor C5's is another
One end ground connection, the cathode ground connection of polar capacitor C4.
Preferably, power management IC circuit includes Charge Management IC chip U2, is connect with the number of Charge Management IC chip U2
The mouth end VIN is connect with the anode of polar capacitor C4, and the class foot PROG in Charge Management IC chip U2 is connect with the one end resistance R2, electricity
The other end ground connection of R2 is hindered, 1 interface in the voltage output end VOUT and battery BAT of Charge Management IC chip U2 connect, charges
The digitally VSS grounding connection in IC chip U2 is managed, and the voltage output end VOUT of Charge Management IC chip U2 is also connected with
Capacitor C3, and the other end ground connection of capacitor C3, the 2 terminals ground connection of battery BAT, and the voltage of Charge Management IC chip U2 is defeated
1 interface in outlet VOUT and battery BAT is BAT point.
Preferably, external power supply circuit includes power circuit and auxiliary power circuit, and power circuit includes Charge Management IC
Chip U1, the input terminal IN of Charge Management IC chip U1 are connected with capacitor C2, polar capacitor C9 anode, diode D6 cathode and two
Pole pipe D4 cathode, the capacitor C2 other end and polar capacitor C9 cathode connect and ground, the anode output voltage of diode D6, two poles
The anode of pipe D4 is connect with the voltage output end VOUT of Charge Management IC chip U2 with 1 interface BAT point in battery BAT, is filled
The ground terminal GND of fulgurite reason IC chip U1 is connected to ground, and the output end OUT of Charge Management IC chip U1 is connected with capacitor C1 and electricity
The other end of source VCC, capacitor C1 are grounded, and pass through the voltage output end VOUT with Charge Management IC chip U2 in auxiliary power circuit
It is connected with resistance R1 with 1 interface BAT point in battery BAT, the other end of resistance R1 is connect with the anode of diode D2, two poles
The cathode output voltage of pipe D2.
Advantageous effects of the invention:
1, overvoltage protection: the R3 in circuit, R6, R8 form voltage sampling circuit, and sampled voltage is sent to MCU, when external electricity
When pressing through high (being more than predeterminated voltage), by the control of MCU, Q1, Q3, external charge electric current is truncated in Q4 cut-off, plays over-voltage guarantor
Shield effect.
2, overcurrent protection: after entering deployment, working as Q1, and after Q3, Q4 are connected, the level that the end P1 detects is the voltage of R18
(resistance value is small, and the internal resistance of metal-oxide-semiconductor is small, so this voltage very little), when charging current very big (or when load short circuits), on R18
Voltage further increases, and when the preset value is exceeded, is controlled by MCU, and Q1, Q3, Q4 end (S1_CONA, S1_CONB at this time
For low level), charge circuit at this time :+5V load port 5 foot ----R16, D5 charging current very little plays overcurrent protection work
When with, overcurrent, ADC detects that voltage is the voltage at the end D5.
3, overheat protector: (thermistor, this resistance welding is on external charging head, for detecting by the R7 in circuit, PT1
The temperature of external charge head and external equipment junction) C8, R10 forms voltage sampling circuit, when detecting that voltage is more than default
When voltage (temperature of charging head and equipment junction is excessively high), by the control of MCU, the charging current of external equipment is truncated, rises
To overheat protector.This function is not mainly it is considered that charging current is very big, but due to other reasons, causes charging head and outer
It is excessively high and charging head or external equipment are burnt out to connect equipment junction temperature.
Detailed description of the invention
Fig. 1 is the system diagram of a preferred embodiment of digital product according to the invention charging alarm control circuit；
Fig. 2 be digital product according to the invention charge alarm control circuit a preferred embodiment micro-control unit with
And alarm bottom switch circuit diagram；
Fig. 3 is the wireless module circuit of a preferred embodiment of digital product according to the invention charging alarm control circuit
Figure；
Fig. 4 is the software download port of a preferred embodiment of digital product according to the invention charging alarm control circuit
Circuit diagram；
Fig. 5 is that the port LED of a preferred embodiment of digital product according to the invention charging alarm control circuit is shown
Circuit diagram；
Fig. 6 is that the buzzer of a preferred embodiment of digital product according to the invention charging alarm control circuit drives electricity
Lu Tu；
Fig. 7 is the first current detecting of a preferred embodiment of digital product according to the invention charging alarm control circuit
And electric operation control circuit figure；
Fig. 8 is the second current detecting of a preferred embodiment of digital product according to the invention charging alarm control circuit
And electric operation control circuit figure；
Fig. 9 is the first external temperature of a preferred embodiment of digital product according to the invention charging alarm control circuit
Detection circuit figure；
Figure 10 is the second external temperature of a preferred embodiment of digital product according to the invention charging alarm control circuit
Spend detection circuit figure；
Figure 11 is the external power supply electricity of a preferred embodiment of digital product according to the invention charging alarm control circuit
Press detection circuit figure；
Figure 12 is the power management IC of a preferred embodiment of digital product according to the invention charging alarm control circuit
Circuit diagram；
Figure 13 is the external power supply electricity of a preferred embodiment of digital product according to the invention charging alarm control circuit
Lu Tu.
Specific embodiment
To make the more clear and clear technical solution of the present invention of those skilled in the art, below with reference to examples and drawings
The present invention is described in further detail, and embodiments of the present invention are not limited thereto.
In the present embodiment, the alarm control circuit as shown in Figure 1, digital product provided in this embodiment charges, including it is micro-
Control unit, buzzer drive circuit, wireless module, external power supply voltage detecting circuit, external temperature detection circuit, power supply pipe
Manage IC circuit, external power supply circuit, current detecting and control circuit and output port, micro-control unit by wireless module into
Row receives or provides wireless signal, and micro-control unit carries out the alarm of buzzer SP1, micro-control by control buzzer drive circuit
Unit processed by external temperature detection circuit and external temperature detection circuit receive voltage signal that external power supply feedback comes and
Temperature signal at charging external equipment head, micro-control unit carry out output port by current detecting and control circuit
The Detection & Controling of electric current, which charge and controlled signal, feeds back to micro-control unit, power management IC circuit by with microcontroller
Unit matching makes it control external power supply circuit to micro-control unit and output port power supply.
In the present embodiment, as shown in Figure 2, Figure 3 and Figure 4, P1.0, P1.1, P1.2, P1.3, P1.4 in micro-control unit
All be set as ADC interface end with P1.5, P1.0, P1.1 and P1.2 respectively with the AD1 interface in the first current detecting and control circuit
The AD3 interface end in AD2 interface end and third current detecting and control circuit in end, the second current detecting and control circuit connects
It connects, P1.3 is connect with the Detector-DC interface end in external power supply voltage detecting circuit, and P1.4 passes through conducting wire and light-emitting diodes
The cathode of pipe D1 connects, and the anode of light emitting diode D1 is connect by conducting wire with the one end resistance R17, and the resistance R17 other end passes through
Wire connecting power VCC, P1.5 are connect by conducting wire with one end resistance R9 in buzzer drive circuit, in micro-control unit
P1.6 and P1.7 be all set as XTAL ADC interface end, the PT1 of P1.6 and MICRO USB in the first current detecting and control circuit connects
Line end connection, wherein 6,7, the 8 and 9 wiring termination of MICRO USB, MICRO in P1.7 and the second current detecting and control circuit
The PT2 terminals of USB connect, wherein 6,7, the 8 and 9 wiring termination of MICRO USB, and P5.4 is set as RST and connects in micro-control unit
Mouth end, and P5.4 is connect with the RED2 terminals in the LED display circuit of port, P5.5 interface end and port in micro-control unit
BLUE2 terminals in LED display circuit connect, and P3.2 and P3.3 is all set as INT interface end, P3.2 and end in micro-control unit
RED1 terminals connection in mouth LED display circuit, P3.3 are connect with the BLUE1 terminals in the LED display circuit of port, micro-control
VCC interface end in unit processed has resistance R5 and capacitor C7 by conductor in parallel, and another terminal grounding resistance R5's of capacitor C7 is another
One end is connect with power supply VCC, the GND interface end ground connection in micro-control unit, and P3.0 is set as RXD interface end in micro-control unit
P3.1 is set as TXD interface end, and P3.0 is connect with 3 interfaces in the JP2 of software download port, and P3.1 is connected to software download port JP2
In 4 interfaces and resistance R12,4 interfaces and electricity of another 3 interfaces for being terminated with linked switch SW1 of resistance R12, linked switch SW
One end of R14 is hindered, the other end of resistance R14 is connect with power supply VCC, and 1 interface of linked switch SW1 connects with the 2 of linked switch SW
Mouth simultaneously connects ground, and 1 interface connects power supply VCC in the JP2 of software download port, 2 interfaces ground connection in the JP2 of software download port,
P2.2 and P2.3 is connect with S1CONB and S1CONA interface in the first current detecting and control circuit respectively in micro-control unit,
P2.4 and P2.5 is connect with S2CONB and S2CONA interface in the second current detecting and control circuit respectively in micro-control unit,
P2.6 and P2.7 is connect with S3CONB and S3CONA interface in third current detecting and control circuit respectively in micro-control unit,
In micro-control unit P2.1, P2.0, P3.7, P3.6, P3.5 and P3.4 respectively with 3 port CE in wireless module XN1,4 port CS,
5 port SCK, 6 port MOSI, 7 port MISO and 8 port IRQ connections, in wireless module XN1 1 port, one group of resistance R4 in parallel and
Capacitor C6, the resistance R4 other end are connect with power supply VCC, and the capacitor C6 other end connect ground connection with wireless module XN1.
Charge control, deployment control, controlling alarm and status display are realized by micro-control unit, pass through wireless module
XN1 realizes the digital wireless receiving and transmission of micro-control unit, by software download port JP2 for carrying out download online journey
Sequence, wherein by the one of another 3 interfaces for being terminated with linked switch SW1 of resistance R12,4 interfaces of linked switch SW and resistance R14
End, the other end of resistance R14 connect with power supply VCC, and 1 interface of linked switch SW1 and 2 interfaces of linked switch SW simultaneously connect ground
Alarm bottom switch is constituted, when alarm is in anti-theft state when thinking to lever up next, alarms, plays people
For alarm is taken away together with external equipment.
The micro-control unit being referred to herein uses the single-chip microcontroller of LAP5W413AS model, the list of the LAP5W413AS model
Piece machine has central processor CPU, random access memory ram, read only memory ROM, a variety of I/O of good Digital Signal Processing ability
Functions display driver circuit, pulse-width modulation circuit, analog multiplexer, the A/D such as mouth and interruption system, timer/counter
The circuits such as converter.
In the present embodiment, as shown in figure 5, port LED display circuit includes first port LED display circuit and second end
Mouthful LED display circuit is in series with resistance R31 with the RED1 connecting of P3.2 in micro-control unit in first port LED display circuit,
And the other end of resistance R31 is connect with the base stage 1 of triode Q8, the emitter 2 of triode Q8 is grounded, the collector of triode Q8
3 connect with the cathode of diode D8, and diode D8 anode is connected with resistance R22, and the other end of resistance R22 is set as the end LED R1 simultaneously
Connect with 3 terminals of MICRO USB in the first current detecting and control circuit, in the LED display circuit of port with microcontroller list
The BLUE1 of P3.3 connection is in series with resistance R34 in member, and the other end of resistance R34 is connect with the base stage 1 of triode Q10, triode
The emitter 2 of Q10 is grounded, and the collector 3 of triode Q10 is in series with resistance R23, and the other end of resistance R23 is set as LED B1 simultaneously
Connect with 2 terminals of MICRO USB in the first current detecting and control circuit, in second port LED display circuit with micro-control
The RED2 of P5.4 connection is in series with resistance R32 in unit processed, and the other end of resistance R32 is connect with the base stage 1 of triode Q9, three poles
The emitter 2 of pipe Q9 is grounded, and the collector 3 of triode Q9 is connect with the cathode of diode D9, and diode D9 anode is connected with electricity
R33 is hindered, the other end of resistance R33 is set as the end LED R2 and 3 wiring with MICRO USB in the second current detecting and control circuit
End connects, and is in series with resistance R35 with the BLUE2 connecting of P5.5 in micro-control unit in the LED display circuit of port, resistance R35's
The other end is connect with the base stage 1 of triode Q11, and the emitter 2 of triode Q11 is grounded, and the collector 3 of triode Q11 is in series with
Resistance R36, the other end of resistance R36 are set as LED B2 and 2 wiring with MICRO USB in the second current detecting and control circuit
End connection realizes whether display external equipment is connected or whether alarmed by port LED display circuit.
The diode being referred to herein all uses the model of 1N5819, is Schottky diode, its reverse withstand voltage
The reverse recovery time of 40V, forward current rating 1A, 1N5819 are extremely short, are suitble to high-frequency circuit work, and triode all uses
BC847 model, the triode of the model are the triode of patch shape, occupy little space, are suitble to the use of integrated circuit.
In the present embodiment, as shown in fig. 6, the resistance R9 being connect in buzzer drive circuit with P1.5 in micro-control unit
The other end connect with the base stage 1 of triode Q2, the emitter 2 of triode Q2 is grounded, and the collector 3 of triode Q2 is connected to buzzing
1 terminals of one end of 2 terminals of device SP1,2 terminals of T1 and capacitor C10, buzzer are in series with capacitor C11, C11's
Other end ground connection, 3 terminals of T1 and 1 terminals of buzzer connect, and 1 terminals of T1 are connect by conducting wire with VBAT, electricity
Hold the other end ground connection of C10, when alarming, buzzer SP1 issues sharp alarm and plays the role of prompting.
The T1 model L200 being referred to herein, buzzer SP1 model TMB12A05.
In the present embodiment, as shown in Figure 7 and Figure 8, current detecting and control circuit include the first current detecting and control
Circuit and the second current detecting and control circuit are connect in the first current detecting and control circuit with P2.3 in micro-control unit
One end of S1CONA is in series with resistance R15, and the other end of resistance R15 is connect with grid in field effect transistor Q1, and field-effect is brilliant
Source electrode in body pipe Q1 is connected to the anode of diode D5, capacitor C12 and resistance R16, and the cathode of diode D5 is another with capacitor C12's
One termination and the one end resistance R18 connect and ground, the other end and moment electricity of drain electrode, resistance R16 in field effect transistor Q1
Constrain the one end diode TVS1 processed all to connect with 5 terminals of MICRO USB in the first current detecting and control circuit, moment electricity
Constrain diode TVS1 other end ground connection processed, and 5 terminals of MICRO USB connect again in the first current detecting and control circuit
There are the drain electrode of field effect transistor Q3, the source electrode of field effect transistor Q3 and the other end and field effect transistor of resistance R18
The drain electrode of Q4 connects, and the grid of field effect transistor Q3 is connect with one end of resistance R20, the source electrode and electricity of field effect transistor Q4
The connection of the one end R38 is hindered, and the junction is P1 point, the grid of field effect transistor Q4 is connect with one end of resistance R21, resistance
The R21 other end is connect with the other end of resistance R20, and the tie point is that S1CONB is connect with P2.3 in micro-control unit, resistance
The other end of R38 is connected with capacitor C15, the other end ground connection of capacitor C15, and resistance R38 and capacitor C15 tie point be AD1 with
P1.0 connection in micro-control unit, 1 connection jaws of MICRO USB export 5V direct current in the first current detecting and control circuit
It presses, is in series with resistance R26 with one end of the S2CONA connecting of P2.5 in micro-control unit in the second current detecting and control circuit,
The other end of resistance R26 is connect with grid in field effect transistor Q5, and the source electrode in field effect transistor Q5 is connected to diode D7
Anode, capacitor C14 and resistance R27, the cathode of diode D7 connect simultaneously with another termination of capacitor C14 with the one end resistance R28
Ground connection, the other end and transient voltage of drain electrode, resistance R27 in field effect transistor Q5 inhibit the one end diode TVS2 all with the
The 5 terminals connection of MICRO USB, transient voltage inhibit another termination of diode TVS2 in two current detectings and control circuit
Ground, and 5 terminals of MICRO USB are connected with the drain electrode of field effect transistor Q6 again in the second current detecting and control circuit,
The source electrode of field effect transistor Q6 is connect with the drain electrode of the other end of resistance R28 and field effect transistor Q7, field effect transistor
The grid of pipe Q6 is connect with one end of resistance R29, and the source electrode of field effect transistor Q7 is connect with the one end resistance R37, and the connection
Place is P2 point, and the grid of field effect transistor Q7 is connect with one end of resistance R30, and the resistance R30 other end is another with resistance R29's
End connection, and the tie point is that S2CONB is connect with P2.4 in micro-control unit, the other end of resistance R37 is connected with capacitor C16,
The other end of capacitor C16 is grounded, and resistance R37 connect for AD2 with P1.1 in micro-control unit with capacitor C16 tie point, and second
1 connection jaws of MICRO USB export 5V DC voltage in current detecting and control circuit, play current detecting and control charging
Effect.
The field effect transistor being referred to herein uses SI2312 model, and the field effect transistor of the model is patch shape
Field effect transistor, occupy little space, be suitble to integrated circuit use, transient voltage inhibit diode TVS use ESD05 type
Number.
In the present embodiment, as shown in Figure 9 and Figure 10, external temperature detection circuit includes first port temperature sensing circuit
With second port temperature sensing circuit, P1.6 connects in the PT1 wiring point and micro-control unit in first port temperature sensing circuit
Connect and be connected with capacitor C8, resistance R10, thermistor PT1 and resistance R13, resistance R13, capacitor C8 and resistance R10 other end phase
It connects and is grounded, by connecting with upper resistance R7, the upper resistance R7 other end and power supply connect the thermistor PT1 other end
It connects, thermistor PT1 and the junction upper resistance R7 are set as PT1A wiring point, the PT1A wiring point and the first current detecting and control
4 connection jaws of MICRO USB connect in circuit processed, the PT2 wiring point and micro-control unit in second port temperature sensing circuit
Middle P1.7 connects and is connected with capacitor C13, resistance R24, thermistor PT2 and resistance R25, resistance R25, capacitor C13 and resistance
The R24 other end is connected with each other and is grounded, and for the thermistor PT2 other end by connecting with upper resistance R11, upper resistance R11 is another
One end connects to power supply, and thermistor PT2 and the junction upper resistance R11 are set as PT2A wiring point, the PT2A wiring point and the
4 connection jaws of MICRO USB connect in two current detectings and control circuit, and the temperature at charging external equipment head is out-of-date to be passed through
Micro-control unit disconnects the electric current of this port.
In the present embodiment, as shown in figure 11, external power supply voltage detecting circuit is connect with P1.3 in micro-control unit
The other end of Detector-DC is connected with resistance R6 and resistance R8, the other end ground connection of resistance R8, the other end and electricity of resistance R6
One end connection of R3, the other end output voltage of resistance R3 are hindered, and the other end of resistance R3 is connected with capacitor C5, polar capacitor C4
Anode, capacitor C5 the other end ground connection, polar capacitor C4 cathode ground connection, when detecting that external voltage is excessively high, by micro-
Outer charging circuit is cut off in the control of control unit.
In the present embodiment, as shown in figure 12, power management IC circuit includes Charge Management IC chip U2, with Charge Management
The anode of the end digital interface VIN of IC chip U2 and polar capacitor C4 connects, the class foot PROG in Charge Management IC chip U2 and
The other end of the connection of the one end resistance R2, resistance R2 is grounded, in the voltage output end VOUT and battery BAT of Charge Management IC chip U2
The connection of 1 interface, the digitally VSS grounding connection in Charge Management IC chip U2, and the voltage of Charge Management IC chip U2 is defeated
Outlet VOUT is also connected with capacitor C3, and the other end ground connection of capacitor C3, the 2 terminals ground connection of battery BAT, and by Charge Management
1 interface in the voltage output end VOUT and battery BAT of IC chip U2 is BAT point, provides charging current to battery, guarantees electricity
Pond safe charging.
The Charge Management IC chip U2 being referred to herein uses MCP73832 model.
In the present embodiment, as shown in figure 13, external power supply circuit includes power circuit and auxiliary power circuit, power supply electricity
Road includes Charge Management IC chip U1, the input terminal IN of Charge Management IC chip U1 be connected with capacitor C2, polar capacitor C9 anode,
Diode D6 cathode and diode D4 cathode, the capacitor C2 other end and polar capacitor C9 cathode connect and ground, diode D6's
Anode output voltage, the anode of diode D4 connect with the voltage output end VOUT of Charge Management IC chip U2 with 1 in battery BAT
The connection of BAT point, the ground terminal GND of Charge Management IC chip U1 are connected to ground at mouthful, the output end OUT of Charge Management IC chip U1
It is connected with capacitor C1 and power supply VCC, the other end ground connection of capacitor C1, LDO voltage regulator circuit is supplied to the voltage of micro-control unit, auxiliary
It helps in power circuit and is connected by 1 interface BAT point in the voltage output end VOUT and battery BAT with Charge Management IC chip U2
It is connected to resistance R1, the other end of resistance R1 is connect with the anode of diode D2, the cathode output voltage of diode D2, when not outer
When connecing power supply, power supply is provided to the ADC sample circuit of port.
The Charge Management IC chip U1 being referred to herein uses KX6209 model.
As shown in Fig. 1-Figure 13, the course of work of digital product charging alarm control circuit provided in this embodiment is as follows:
Step 1: when port does not have external equipment, (S1_CONA is high level) is connected in Q1, and Q3, Q4 is not turned on (S1_
CONB is low level), the level at the end P1 is that the value that 0, ADC is detected is O, when there is external equipment in port, 1 foot of port is+
5V by 5 feet of port through Q1, D5, then arrives ground and forms a charge circuit, the level at the end P1 at this time is by external equipment
0.3V (is determined) that the value that ADC is detected is not 0 by the characteristic of diode, and alarm enters deployment state at this time；
Step 2: after entering deployment state, after the value of ADC detection reaches preset value, (S1_CONB becomes for Q3, Q4 conducting
For high level), charging current, through external equipment, returns 5 feet of port by 1 foot of port, and through Q3, resistance 18 (0.022R) is arrived
Ground forms a charge circuit, and charging current at this time increases (the not pressure drop of diode)；
Step 3: alarm generates: after entering deployment, after external equipment is pulled out, the voltage at the end P1, which becomes 0, (does not have electric current stream
Cross D5 or R18), it alarms at this time.
In conclusion in the present embodiment, the R3 in circuit, R6, R8 form voltage sampling circuit, sampled voltage is sent to
MCU passes through the control of MCU, Q1, Q3, Q4 cut-off, truncation external charge electricity when external voltage is excessively high (being more than predeterminated voltage)
Stream, plays the role of overvoltage protection, into after deployment, works as Q1, and after Q3, Q4 are connected, the level that the end P1 detects is the voltage of R18
(resistance value is small, and the internal resistance of metal-oxide-semiconductor is small, so this voltage very little), when charging current very big (or when load short circuits), on R18
Voltage further increases, and when the preset value is exceeded, is controlled by MCU, and Q1, Q3, Q4 end (S1_CONA, S1_CONB at this time
For low level), charge circuit at this time :+5V load port 5 foot ----R16, D5 charging current very little plays overcurrent protection work
When with, overcurrent, ADC detects that voltage is the voltage at the end D5, and the R7 in circuit, (thermistor, this resistance welding is external by PT1
On charging head, for detecting the temperature of external charge head Yu external equipment junction) C8, R10 form voltage sampling circuit, work as inspection
When measuring voltage more than predeterminated voltage (temperature of charging head and equipment junction is excessively high), by the control of MCU, external set is truncated
Standby charging current, plays overheat protector.This function is not mainly it is considered that charging current is very big, but due to other reasons,
Cause that charging head is excessively high with external equipment junction temperature and charging head or external equipment are burnt out.
The above, further embodiment only of the present invention, but scope of protection of the present invention is not limited thereto, and it is any
Within the scope of the present disclosure, according to the technique and scheme of the present invention and its design adds those familiar with the art
With equivalent substitution or change, protection scope of the present invention is belonged to.
Claims (9)
- The alarm control circuit 1. a kind of digital product charges, including it is micro-control unit, buzzer drive circuit, wireless module, outer Connect voltage detection circuit, external temperature detection circuit, power management IC circuit, external power supply circuit, current detecting and control Circuit and output port processed, which is characterized in that micro-control unit: aobvious for charge control, deployment control, controlling alarm and state Show；Buzzer drive circuit: when alarming, driving buzzer issues sharp alarm and plays driving buzzer warning The effect of prompting；Wireless module: play the role of wireless receiving；External power supply voltage detecting circuit: for detecting the height of external voltage, when external voltage is excessively high, pass through microcontroller list External charge circuit is cut off in the control of member；External temperature detection circuit: temperature height when for detecting charging at charging external equipment head works as charging external equipment At head when the temperature is excessively high, the electric current of this port is cut off by micro-control unit；Power management IC circuit: the electricity flow and flow direction for controlling external power supply circuit output are to cooperate micro-control unit Control need；External power supply circuit: for being supplied to the stable voltage of micro-control unit；Current detecting and control circuit: it plays when being charged by the first output port to the work of the Detection & Controling charging of electric current With；Micro-control unit is received or is provided wireless signal by wireless module, and micro-control unit passes through control buzzer driving Circuit carries out the alarm of buzzer SP1, and micro-control unit is received by external temperature detection circuit and external temperature detection circuit The temperature signal at voltage signal and charging external equipment head that external power supply feedback comes, micro-control unit pass through electric current The Detection & Controling that detection and control circuit carry out electric current to output port, which charge and controlled signal, feeds back to microcontroller list Member, power management IC circuit with micro-control unit cooperation by making it control external power supply circuit to micro-control unit and output Port power supply.
- The alarm control circuit 2. a kind of digital product according to claim 1 charges, it is characterised in that: in micro-control unit P1.0, P1.1, P1.2, P1.3, P1.4 and P1.5 are all set as ADC interface end, and P1.0, P1.1 and P1.2 are examined with the first electric current respectively Survey and the AD2 interface end in the AD1 interface end in control circuit, the second current detecting and control circuit and third current detecting and AD3 interface end connection in control circuit, P1.3 connect with the Detector-DC interface end in external power supply voltage detecting circuit It connects, P1.4 is connect by conducting wire with the cathode of light emitting diode D1, and the anode of light emitting diode D1 passes through conducting wire and resistance R17 mono- End connection, the resistance R17 other end pass through the resistance in conducting wire and buzzer drive circuit by wire connecting power VCC, P1.5 The connection of the one end R9, in micro-control unit P1.6 and P1.7 be all set as XTAL ADC interface end, P1.6 and the first current detecting and control The PT1 terminals connection of MICRO USB in circuit processed, wherein 6,7, the 8 and 9 wiring termination of MICRO USB, P1.7 and second are electric The PT2 terminals connection of MICRO USB in stream detection and control circuit, wherein 6,7, the 8 and 9 wiring termination of MICRO USB, micro- P5.4 is set as RST interface end in control unit, and P5.4 is connect with the RED2 terminals in the LED display circuit of port, microcontroller P5.5 interface end is connect with the BLUE2 terminals in the LED display circuit of port in unit, and P3.2 and P3.3 be all in micro-control unit It is set as INT interface end, P3.2 is connect with the RED1 terminals in the LED display circuit of port, in P3.3 and port LED display circuit The connection of BLUE1 terminals, the VCC interface end in micro-control unit has resistance R5 and capacitor C7, capacitor C7 by conductor in parallel The other end of another terminal grounding resistance R5 connect with power supply VCC, the GND interface end ground connection in micro-control unit, microcontroller list P3.0 is set as RXD interface end P3.1 and is set as TXD interface end in member, and P3.0 is connect with 3 interfaces in the JP2 of software download port, P3.1 is connected to 4 interfaces and resistance R12 in the JP2 of software download port, and resistance R12 is another to be terminated with the 3 of linked switch SW1 and connect One end of mouth, 4 interfaces of linked switch SW and resistance R14, the other end of resistance R14 are connect with power supply VCC, linked switch SW1 1 interface and 2 interfaces of linked switch SW and connect ground, 1 interface connects power supply VCC in the JP2 of software download port, under software 2 interfaces are grounded in load port JP2, in micro-control unit P2.2 and P2.3 respectively with S1 in the first current detecting and control circuit CONB with S1 CONA interface connects, and P2.4 and P2.5 is respectively and in the second current detecting and control circuit in micro-control unit S2 CONB is connected with S2 CONA interface, in micro-control unit P2.6 and P2.7 respectively with third current detecting and control circuit Middle S3 CONB is connected with S3 CONA interface, in micro-control unit P2.1, P2.0, P3.7, P3.6, P3.5 and P3.4 respectively with 3 port CE, 4 port CS, 5 port SCK, 6 port MOSI, 7 port MISO and 8 port IRQ connections in wireless module XN1, wirelessly 1 port parallel connection, one group of resistance R4 and capacitor C6, the resistance R4 other end are connect with power supply VCC in module XN1, the capacitor C6 other end with Wireless module XN1 connection ground connection.
- The alarm control circuit 3. a kind of digital product according to any one of claims 1 or 2 charges, it is characterised in that: Port LED display circuit includes first port LED display circuit and second port LED display circuit, first port LED display electricity The RED1 of P3.2 connection is in series with resistance R31, and the base of the other end of resistance R31 and triode Q8 in Lu Zhongyu micro-control unit Pole 1 connects, and the emitter 2 of triode Q8 is grounded, and the collector 3 of triode Q8 is connect with the cathode of diode D8, diode D8 Anode is connected with resistance R22, the other end of resistance R22 be set as the end LED R1 and in the first current detecting and control circuit 3 terminals of MICRO USB connect, and are in series with electricity with the BLUE1 connecting of P3.3 in micro-control unit in the LED display circuit of port R34 is hindered, the other end of resistance R34 is connect with the base stage 1 of triode Q10, and the emitter 2 of triode Q10 is grounded, triode Q10 Collector 3 be in series with resistance R23, the other end of resistance R23 be set as LED B1 and in the first current detecting and control circuit 2 terminals of MICRO USB connect, the RED2 series connection connecting in second port LED display circuit with P5.4 in micro-control unit There is resistance R32, the other end of resistance R32 is connect with the base stage 1 of triode Q9, and the emitter 2 of triode Q9 is grounded, triode Q9 Collector 3 connect with the cathode of diode D9, diode D9 anode is connected with resistance R33, and the other end of resistance R33 is set as The end LED R2 is simultaneously connect with 3 terminals of MICRO USB in the second current detecting and control circuit, in the LED display circuit of port Resistance R35, the other end of resistance R35 and the base stage 1 of triode Q11 are in series with the BLUE2 connecting of P5.5 in micro-control unit The emitter 2 of connection, triode Q11 is grounded, and the collector 3 of triode Q11 is in series with resistance R36, and the other end of resistance R36 is set It is connect for LED B2 and with 2 terminals of MICRO USB in the second current detecting and control circuit.
- The alarm control circuit 4. a kind of digital product according to any one of claims 1 or 2 charges, it is characterised in that: The other end for the resistance R9 connecting in buzzer drive circuit with P1.5 in micro-control unit is connect with the base stage 1 of triode Q2, The emitter 2 of triode Q2 is grounded, and the collector 3 of triode Q2 is connected to 2 terminals and electricity of 2 terminals of buzzer SP1, T1 Hold one end of C10,1 terminals of buzzer are in series with capacitor C11, the other end ground connection of C11,3 terminals and buzzer of T1 The connection of 1 terminals, 1 terminals of T1 are connect by conducting wire with VBAT, and the other end of capacitor C10 is grounded.
- The alarm control circuit 5. a kind of digital product according to any one of claims 1 or 2 charges, it is characterised in that: Current detecting and control circuit include the first current detecting and control circuit and the second current detecting and control circuit, the first electric current The one end for the S1 CONA connecting in detection and control circuit with P2.3 in micro-control unit is in series with resistance R15, resistance R15's The other end is connect with grid in field effect transistor Q1, and the source electrode in field effect transistor Q1 is connected to the anode of diode D5, electricity Hold C12 and resistance R16, the cathode of diode D5 and another termination of capacitor C12 and the one end resistance R18 connect and ground, field effect Answer the drain electrode in transistor Q1, the other end of resistance R16 and transient voltage that the one end diode TVS1 is inhibited all to examine with the first electric current The 5 terminals connection of MICRO USB in survey and control circuit, transient voltage inhibit diode TVS1 other end ground connection, and first 5 terminals of MICRO USB are connected with the drain electrode of field effect transistor Q3, field effect transistor again in current detecting and control circuit The source electrode of pipe Q3 is connect with the drain electrode of the other end of resistance R18 and field effect transistor Q4, the grid of field effect transistor Q3 It is connect with one end of resistance R20, the source electrode of field effect transistor Q4 is connect with the one end resistance R38, and the junction is P1 point, field The grid of effect transistor Q4 is connect with one end of resistance R21, and the resistance R21 other end is connect with the other end of resistance R20, and should Tie point is that S1 CONB is connect with P2.3 in micro-control unit, and the other end of resistance R38 is connected with capacitor C15, capacitor C15's Other end ground connection, and resistance R38 and capacitor C15 tie point connect for AD1 with P1.0 in micro-control unit, the first current detecting and 1 connection jaws of MICRO USB export 5V DC voltage in control circuit, in the second current detecting and control circuit with microcontroller list One end of the S2 CONA of P2.5 connection is in series with resistance R26, grid in the other end and field effect transistor Q5 of resistance R26 in member Pole connects, and the source electrode in field effect transistor Q5 is connected to the anode of diode D7, capacitor C14 and resistance R27, the yin of diode D7 Another termination and the one end resistance R28 connect and ground of pole and capacitor C14, drain electrode, resistance R27 in field effect transistor Q5 The other end and transient voltage inhibit the one end diode TVS2 all to connect with 5 of MICRO USB in the second current detecting and control circuit Line end connection, transient voltage inhibit diode TVS2 other end ground connection, and MICRO USB in the second current detecting and control circuit 5 terminals be connected with the drain electrode of field effect transistor Q6 again, the other end of the source electrode of field effect transistor Q6 and resistance R28 with And the drain electrode connection of field effect transistor Q7, the grid of field effect transistor Q6 are connect with one end of resistance R29, field effect transistor The source electrode of pipe Q7 is connect with the one end resistance R37, and the junction is P2 point, and the grid of field effect transistor Q7 is with resistance R30's One end connection, the resistance R30 other end are connect with the other end of resistance R29, and the tie point is in S2 CONB and micro-control unit P2.4 connection, the other end of resistance R37 are connected with capacitor C16, the other end ground connection of capacitor C16, and resistance R37 and capacitor C16 Tie point is that AD2 is connect with P1.1 in micro-control unit, 1 connection jaws of MICRO USB in the second current detecting and control circuit Export 5V DC voltage.
- The alarm control circuit 6. a kind of digital product according to any one of claims 1 or 2 charges, it is characterised in that: External temperature detection circuit includes first port temperature sensing circuit and second port temperature sensing circuit, the inspection of first port temperature PT1 wiring point in slowdown monitoring circuit connect and be connected with P1.6 in micro-control unit capacitor C8, resistance R10, thermistor PT1 and Resistance R13, resistance R13, capacitor C8 and the resistance R10 other end are connected with each other and are grounded, the thermistor PT1 other end by with it is upper Position resistance R7 connection, the upper resistance R7 other end connect to power supply, and thermistor PT1 and the junction upper resistance R7 are set as PT1A Wiring point, the PT1A wiring point are connect with 4 connection jaws of MICRO USB in the first current detecting and control circuit, second port PT2 wiring point in temperature sensing circuit connect with P1.7 in micro-control unit and is connected with capacitor C13, resistance R24, temperature-sensitive electricity PT2 and resistance R25 is hindered, resistance R25, capacitor C13 and the resistance R24 other end are connected with each other and are grounded, the thermistor PT2 other end By connecting with upper resistance R11, the upper resistance R11 other end is connected to power supply, and thermistor PT2 and upper resistance R11 connect The place of connecing is set as PT2A wiring point, and 4 connection jaws of MICRO USB connect in the PT2A wiring point and the second current detecting and control circuit It connects.
- The alarm control circuit 7. a kind of digital product according to any one of claims 1 or 2 charges, it is characterised in that: External power supply voltage detecting circuit and the other end of the Detector-DC connecting of P1.3 in micro-control unit be connected with resistance R6 and The other end of resistance R8, resistance R8 are grounded, and the other end of resistance R6 is connect with one end of resistance R3, the other end output of resistance R3 Voltage, and the other end of resistance R3 is connected with the anode of capacitor C5, polar capacitor C4, the other end ground connection of capacitor C5, polarity electricity Hold the cathode ground connection of C4.
- The alarm control circuit 8. a kind of digital product according to any one of claims 1 or 2 charges, it is characterised in that: Power management IC circuit includes Charge Management IC chip U2, with the end digital interface VIN of Charge Management IC chip U2 and polarity electricity Hold the anode connection of C4, the class foot PROG in Charge Management IC chip U2 is connect with the one end resistance R2, another termination of resistance R2 Ground, 1 interface in the voltage output end VOUT and battery BAT of Charge Management IC chip U2 is connect, in Charge Management IC chip U2 Digitally VSS grounding connection, and the voltage output end VOUT of Charge Management IC chip U2 is also connected with capacitor C3, and capacitor C3 Other end ground connection, the 2 terminals ground connection of battery BAT, and by the voltage output end VOUT and battery of Charge Management IC chip U2 1 interface in BAT is BAT point.
- The alarm control circuit 9. a kind of digital product according to any one of claims 1 or 2 charges, it is characterised in that: External power supply circuit includes power circuit and auxiliary power circuit, and power circuit includes Charge Management IC chip U1, Charge Management The input terminal IN of IC chip U1 is connected with capacitor C2, polar capacitor C9 anode, diode D6 cathode and diode D4 cathode, capacitor The C2 other end and polar capacitor C9 cathode connect and ground, the anode output voltage of diode D6, the anode of diode D4 with fill 1 interface BAT point in the voltage output end VOUT and battery BAT of fulgurite reason IC chip U2 is connect, Charge Management IC chip U1 Ground terminal GND be connected to ground, the output end OUT of Charge Management IC chip U1 is connected with capacitor C1 and power supply VCC, capacitor C1's The other end is grounded, and passes through 1 in the voltage output end VOUT and battery BAT with Charge Management IC chip U2 in auxiliary power circuit Interface BAT point is connected with resistance R1, and the other end of resistance R1 is connect with the anode of diode D2, the cathode output of diode D2 Voltage.
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| CN112863095A (en) * | 2021-01-27 | 2021-05-28 | 深圳市东峰盛科技有限公司 | Anti-theft alarm device connected with power adapter |
| CN114937345A (en) * | 2021-06-18 | 2022-08-23 | 天一智能科技(无锡)有限公司 | Fling-cut switch with data acquisition and control functions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112863095A (en) * | 2021-01-27 | 2021-05-28 | 深圳市东峰盛科技有限公司 | Anti-theft alarm device connected with power adapter |
| CN114937345A (en) * | 2021-06-18 | 2022-08-23 | 天一智能科技(无锡)有限公司 | Fling-cut switch with data acquisition and control functions |
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| Publication number | Publication date |
|---|---|
| CN110165741B (en) | 2024-08-23 |
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