CN205749843U - A kind of Switching Power Supply observation circuit - Google Patents
A kind of Switching Power Supply observation circuit Download PDFInfo
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- CN205749843U CN205749843U CN201620076280.9U CN201620076280U CN205749843U CN 205749843 U CN205749843 U CN 205749843U CN 201620076280 U CN201620076280 U CN 201620076280U CN 205749843 U CN205749843 U CN 205749843U
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Abstract
The utility model discloses a kind of Switching Power Supply observation circuit, in current detection circuit detection Switching Power Supply, the first voltage of preset resistance, is the second voltage by the first voltage amplification；The tertiary voltage of voltage detecting circuit detection switched power output, is the 4th voltage by tertiary voltage blood pressure lowering；5th voltage of the outfan of temperature sensing circuit detection Switching Power Supply, is the 6th voltage by the 5th voltage step-down；Control circuit, according to the second voltage and the output electric current of preset resistance computing the resistor value Switching Power Supply, calculates tertiary voltage according to the 4th voltage, determines the temperature of switched power output according to the voltage temperature relation table of the 6th voltage and storage；Output electric current, tertiary voltage and temperature transition are that digital signal is sent to display device by telecommunication circuit, receive the instruction that display device sends, instruction is converted to analogue signal；The instruction of conversion is sent to Switching Power Supply by control circuit.This utility model embodiment, can monitoring switch source current, voltage and temperature in real time.
Description
Technical field
This utility model relates to electronic circuit technology field, is specifically related to a kind of Switching Power Supply observation circuit.
Background technology
Switching Power Supply is power supply relatively common in daily life, when needs are powered, can close switch
Making Switching Power Supply be powered, when need not power supply, the power supply of Switching Power Supply can be disconnected with roof-cut resistence.
But when Switching Power Supply works, the voltage of Switching Power Supply, electric current and temperature may be along with working environments etc.
Change, when the output voltage of Switching Power Supply, electric current, temperature are excessive, Switching Power Supply will be caused to drive
Dynamic equipment is because of voltage or electric current is excessive burns or Switching Power Supply is burnt because temperature is too high, therefore, supervises in real time
Slowdown monitoring switch power supply is a technical problem urgently to be resolved hurrily.
Utility model content
The open a kind of Switching Power Supply observation circuit of this utility model embodiment, for real-time monitoring switch power supply
Electric current, voltage and temperature.
The open a kind of Switching Power Supply observation circuit of this utility model, including current detection circuit, voltage detecting
Circuit, temperature sensing circuit, control circuit and telecommunication circuit, wherein:
The input IN of described current detection circuit is used for connecting described Switching Power Supply, described current detecting electricity
The outfan OUT on road connects the first signal input part IN1 of described control circuit, described voltage detecting circuit
Input IN be used for connecting described Switching Power Supply, the outfan OUT of described voltage detecting circuit connects institute
Stating the secondary signal input IN2 of control circuit, the input IN of described temperature sensing circuit is used for connecting institute
Stating Switching Power Supply, the outfan OUT of described temperature sensing circuit connects the 3rd signal of described control circuit
Input IN3, the first outfan OUT1 of described control circuit is used for connecting described Switching Power Supply, described
Second outfan OUT2 of control circuit connects the input IN of described telecommunication circuit, described control circuit
First communication ends R connects the first communication ends R of described telecommunication circuit, the second communication ends of described control circuit
T connects the second communication ends T of described telecommunication circuit, the third communication end C1 of described telecommunication circuit and four-way
Letter end C2 is respectively used to connect display device；
Described current detection circuit, for the first voltage detected in described Switching Power Supply in preset resistance,
It is the second voltage by described first voltage amplification and is sent to described control circuit；
Described voltage detecting circuit, for detecting the tertiary voltage of described switched power output, by described
Tertiary voltage blood pressure lowering is the 4th voltage and is sent to described control circuit；
Described temperature sensing circuit, for detecting the 5th voltage of the outfan of described Switching Power Supply, by institute
State the 5th voltage step-down to be the 6th voltage and be sent to described control circuit；
Described control circuit, for opening according to described second voltage and described preset resistance computing the resistor value
Close the output electric current of power supply, calculate described tertiary voltage according to described 4th voltage, according to described 6th electricity
The voltage temperature relation table of pressure and storage determines the temperature of described switched power output, by described output electricity
Stream, described tertiary voltage and described temperature are sent to described telecommunication circuit；
Described telecommunication circuit, for by described output electric current, described tertiary voltage and described temperature transition being
Digital signal is also sent to described display device, and receives the target instruction target word that described display device sends,
Described target instruction target word is converted to analogue signal and is sent to described control circuit；
Described control circuit, is additionally operable to the described target instruction target word of conversion is sent to described Switching Power Supply.
In one embodiment, described current detection circuit includes resistance R1-R7, electric capacity C1-C6, amplification
Device A, wherein:
One end of described R1 is used for connecting described Switching Power Supply, and the other end of described R1 connects described R2 respectively
The reverse input of one end, one end of described C1, one end of described C2, one end of described C3 and described A
End, the other end of described C1 connects the positive input of described A, one end of described C4, described R3 respectively
One end and one end of described R4, the power end of described A connects one end of described R5 and described C5 respectively
One end, the other end of described R5 is used for connecting power supply, the outfan of described A, the other end of described C2,
The other end of described R2, one end of described C6, one end of described R6 connect as described current detection circuit
Outfan, the other end of described R6 connects one end of described R7, the other end of described R3, described R4
The other end, the other end of described C3, the other end of described C4, the earth terminal of described A, described C5
The other end of the other end, the other end of described C6 and described R7 is respectively used to even earth terminal.
In one embodiment, described current detection circuit also includes resistance R8, wherein:
One end of described R8 connects the outfan of described A, and the other end of described R8 is as described current detecting
The outfan of circuit.
In one embodiment, described voltage detecting circuit includes resistance R9-R10, wherein:
One end of described R9 is used for connecting described Switching Power Supply, the other end of described R9 and the one of described R10
End connects the outfan as described voltage detecting circuit, and the other end of described R10 is for even earth terminal.
In one embodiment, described voltage detecting circuit also includes resistance R11, wherein:
Described R11 is connected in parallel with described R10.
In one embodiment, described temperature sensing circuit includes critesistor N, resistance R12, wherein:
One end of described N is used for connecting one end of described Switching Power Supply, the other end of described N and described R12
Connecting the outfan as described temperature sensing circuit, the other end of described R12 is for even earth terminal.
In one embodiment, described control circuit includes control chip U1, program burn-back circuit, electric capacity
C7-C9, polar capacitor EC, wherein:
The first input/output terminal I/O of described U1 is used for connecting described Switching Power Supply, the clock end of described U1
ICPCLK connects the first outfan OUT1 of described program burn-back circuit, the data terminal of described U1
ICPDATA connects the second outfan OUT2 of described program burn-back circuit, the reset terminal of described U1
RESET connects the first frequency vibration end of the 3rd outfan OUT3, described U1 of described program burn-back circuit
XTAL1 connects one end of described C7, and the second frequency vibration end XTAL2 of described U1 connects the one of described C8
End, the second input and output I/O end of described U1 connects the of the input IN, described U1 of described telecommunication circuit
One communication ends RXD connects the first communication ends R of described telecommunication circuit, second communication ends TXD of described U1
Connecting the second communication ends T of described telecommunication circuit, the power end VDD of described U1 connects described C9's respectively
One end and the positive pole of described EC, the positive pole of described EC is used for connecting power supply, the first signal input of described U1
End ADC0 connects the secondary signal input of the outfan OUT, described U1 of described current detection circuit
ADC1 connects the 3rd signal input part ADC2 of the outfan OUT, described U1 of described voltage detecting circuit
Connect the outfan OUT of described temperature sensing circuit, the input IN of described program burn-back circuit for even
Connect fever writes, the earth terminal SGND of described U1, the other end of described C7, the other end of described C8, institute
The negative pole of the other end and described EC of stating C9 is respectively used to even earth terminal.
In one embodiment, described control circuit also includes crystal oscillator pipe X, wherein:
One end of described X connects one end of described C7, and the other end of described X connects one end of described C8.
In one embodiment, described program burn-back circuit includes burning program port, resistance R13-R14, electricity
Hold C10, wherein:
In described burning program port, one end of the first port 1 connects one end of described R13, described C10 respectively
One end and the reset terminal RESET of described U1, in described burning program port the second port 2 one end connect institute
Stating the clock end ICPCLK of U1, in described burning program port, one end of the 3rd port 3 connects described R14's
One end, in described burning program port, one end of the 4th port 4 connects the data terminal ICPDATA of described U1, institute
The other end of the other end and described R14 of stating R13 be respectively used to connect power supply, the other end of described C10 and
In described burning program port, one end of fifth port 5 is respectively used to even earth terminal, in described burning program port the
The other end of Single port 1, the other end of the second port 2, the other end of the 3rd port 3, the 4th port 4
The other end of the other end and fifth port 5 is respectively used to connect described fever writes.
In one embodiment, described telecommunication circuit includes resistance R15-R20, electric capacity C11-C12, communication
Chip U2, wherein:
The data output end RO of described U2 connects one end of described R15, and the other end of described R15 connects respectively
Connect one end of described R16 and first communication ends RXD of described U1, reception Enable Pin RE of described U2 and driving
Dynamic Enable Pin DE connects the second input and output I/O end of described U1, the driving input DI of described U2 respectively
Connecting one end of described R17, the other end of described R17 connects one end of described R18 and described U1 respectively
Second communication ends TXD, one end of the in-phase end A and described R19 of described U2 is used for connecting described display and sets
Standby, the other end of the end of oppisite phase B and described R19 of described U is used for connecting described display device, described U2's
Power end VCC connects one end of described C11, one end of described C12 and one end of described R20, institute respectively
State the other end of R20 for connecting power supply, the other end of described R16, the other end of described R18, described
The other end of ground end SGND, the other end of described C11 and the described C12 of U2 is respectively used to even earth terminal.
In this utility model embodiment, current detection circuit, voltage detecting circuit and temperature inspection can be passed through
Slowdown monitoring circuit detects output electric current, the output voltage of Switching Power Supply and the temperature of Switching Power Supply of Switching Power Supply successively
Degree, such that it is able to monitoring switch source current, voltage and temperature in real time.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below will be in embodiment
The required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is this practicality
Some novel embodiments, for those of ordinary skill in the art, are not paying creative work
Under premise, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the principle schematic of a kind of Switching Power Supply observation circuit disclosed in this utility model embodiment；
Fig. 2 is the principle schematic of another kind of Switching Power Supply observation circuit disclosed in this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment
Scheme is clearly and completely described, it is clear that described embodiment is only this utility model part
Embodiment rather than whole embodiments.Based on the embodiment in this utility model, the common skill in this area
The every other embodiment that art personnel are obtained under not making creative work premise, broadly falls into this reality
By novel protected scope.
The open a kind of Switching Power Supply observation circuit of this utility model embodiment, for real-time monitoring switch power supply
Electric current, voltage and temperature.It is described in detail individually below.
Referring to Fig. 1, Fig. 1 is the knot of a kind of Switching Power Supply observation circuit disclosed in this utility model embodiment
Structure schematic diagram.As it is shown in figure 1, this Switching Power Supply observation circuit can include that current detection circuit, voltage are examined
Slowdown monitoring circuit, temperature sensing circuit, control circuit and telecommunication circuit, wherein:
The input IN of current detection circuit is used for connecting valve power supply, the outfan of current detection circuit
OUT connects the first signal input part IN1, the input IN of voltage detecting circuit of control circuit and is used for connecting
Switching Power Supply, the outfan OUT of voltage detecting circuit connects the secondary signal input IN2 of control circuit,
The input IN of temperature sensing circuit is used for connecting valve power supply, and the outfan OUT of temperature sensing circuit is even
3rd signal input part IN3 of connection control circuit, the first outfan OUT1 of control circuit open for connection
Closing power supply, the second outfan OUT2 of control circuit connects the input IN of telecommunication circuit, control circuit
First communication ends R connects the first communication ends R of telecommunication circuit, and the second communication ends T of control circuit connects logical
Second communication ends T of letter circuit, the third communication end C1 and fourth communication end C2 of telecommunication circuit are respectively used to
Connect display device；
Current detection circuit, for the first voltage detected in Switching Power Supply in preset resistance, by the first electricity
Press the greatly second voltage and be sent to control circuit；
Voltage detecting circuit, for detecting the tertiary voltage of switched power output, by tertiary voltage blood pressure lowering
It is the 4th voltage and is sent to control circuit；
Temperature sensing circuit, for detecting the 5th voltage of the outfan of Switching Power Supply, by the 5th voltage drop
Pressure is the 6th voltage and is sent to control circuit；
Control circuit, is used for according to the second voltage and the output electric current of preset resistance computing the resistor value Switching Power Supply,
Calculate tertiary voltage according to the 4th voltage, determine out according to the voltage temperature relation table of the 6th voltage and storage
Close the temperature of power output end, output electric current, tertiary voltage and temperature are sent to telecommunication circuit；
Telecommunication circuit, for being digital signal by output electric current, tertiary voltage and temperature transition and being sent to
Display device, and receive the target instruction target word that display device sends, target instruction target word is converted to analogue signal
And it is sent to control circuit；
Control circuit, is additionally operable to the target instruction target word of conversion is sent to Switching Power Supply.
In the present embodiment, the first voltage in preset resistance in current detection circuit detection Switching Power Supply, and
By the first voltage amplification preset multiple to obtain the second voltage, afterwards the second voltage is sent to control circuit；
The tertiary voltage of voltage detecting circuit detection switched power output, is the 4th voltage by tertiary voltage blood pressure lowering,
Afterwards the 4th voltage is sent to control circuit；The of the outfan of temperature sensing circuit detection Switching Power Supply
Five voltages, are the 6th voltage by the 5th voltage step-down, afterwards the 6th voltage are sent to control circuit；Control
Circuit processed receives the second voltage of current detection circuit transmission, voltage detecting circuit sends the 4th presses
After the 6th voltage of temperature sensing circuit transmission, by the second voltage divided by preset resistance resistance with default
4th voltage, to obtain the output electric current of Switching Power Supply, is multiplied by voltage detecting circuit by the product of multiple
Blood pressure lowering multiple, to obtain the output voltage (i.e. tertiary voltage) of Switching Power Supply, utilizes the 6th voltage and storage
Voltage temperature relation table determines the temperature of switched power output.Wherein, preset multiple, blood pressure lowering multiple,
Voltage temperature relation table etc. is stored in advance in control circuit.When Switching Power Supply includes a supply module
Time, the quantity of temperature sensing circuit is one, when Switching Power Supply includes at least two supply module, accordingly
Ground, the quantity of temperature sensing circuit is also at least two, in order to a temperature sensing circuit can detect one
The temperature of individual supply module outfan, such that it is able to each module outfan in real-time monitoring switch power supply
Temperature, Fig. 1 only depicts the situation of a temperature sensing circuit.
At the Switching Power Supply observation circuit described by Fig. 1, current detection circuit, voltage detecting electricity can be passed through
Road and temperature sensing circuit detect output electric current, the output voltage of Switching Power Supply of Switching Power Supply successively and open
Close the temperature of power supply, such that it is able to monitoring switch source current, voltage and temperature in real time.
Referring to Fig. 2, Fig. 2 is another kind of Switching Power Supply observation circuit disclosed in this utility model embodiment
Structural representation.Wherein, the Switching Power Supply observation circuit shown in Fig. 2 is to supervise the Switching Power Supply shown in Fig. 1
Slowdown monitoring circuit is optimized and obtains, wherein:
Current detection circuit can include resistance R1-R7, electric capacity C1-C6, amplifier A, wherein:
One end of R1 be used for connecting valve power supply, the other end of R1 connect respectively one end of R2, one end of C1,
One end of C2, one end of C3 and the reverse input end of A, the other end of C1 connects the forward input of A respectively
End, one end of C4, one end of R3 and one end of R4, the power end of A connects one end of R5 and C5 respectively
One end, the other end of R5 is used for connecting power supply, the outfan of A, the other end of C2, the other end of R2,
One end of C6, one end of R6 connect the outfan as current detection circuit, and the other end of R6 connects R7
One end, the other end of R3, the other end of R4, the other end of C3, the other end of C4, the earth terminal of A,
The other end of the other end of C5, the other end of C6 and R7 is respectively used to even earth terminal.
As a kind of possible embodiment, current detection circuit can also include resistance R8, wherein:
One end of R8 connects the outfan of A, and the other end of R8 is as the outfan of current detection circuit.
In the present embodiment, electric capacity C1-C6 is used for filtering, and resistance R6-R8 is used for dividing potential drop.
As a kind of possible embodiment, voltage detecting circuit can include resistance R9-R10, wherein:
One end of R9 is used for connecting valve power supply, and the other end of R9 is connected with one end of R10 to be examined as voltage
The outfan of slowdown monitoring circuit, the other end of R10 is for even earth terminal.
In the present embodiment, resistance R9-R10 is used for dividing potential drop.
As a kind of possible embodiment, voltage detecting circuit can also include resistance R11, wherein:
R11 with R10 is connected in parallel.
As a kind of possible embodiment, temperature sensing circuit can include critesistor N, resistance R12,
Wherein:
One end of N is used for connecting valve power supply, and the other end of N is connected as temperature detection with one end of R12
The outfan of circuit, the other end of R12 is for even earth terminal.
In the present embodiment, critesistor N and resistance R12 is used for dividing potential drop, and the resistance of critesistor N is with temperature
Change and change.
As a kind of possible embodiment, control circuit can include control chip U1, program burn-back electricity
Road, electric capacity C7-C9, polar capacitor EC, wherein:
The first input/output terminal I/O of U1 is used for connecting valve power supply, and the clock end ICPCLK of U1 connects journey
The data terminal ICPDATA linker burn-back circuit of the first outfan OUT1 of sequence burn-back circuit, U1
3rd outfan OUT3 of the reset terminal RESET linker burn-back circuit of the second outfan OUT2, U1,
The first frequency vibration end XTAL1 of U1 connects one end of C7, and the second frequency vibration end XTAL2 of U1 connects
One end of C8, the first of the input IN, U1 of the second input and output I/O end connection telecommunication circuit of U1 is led to
Letter end RXD connects the first communication ends R of telecommunication circuit, and second communication ends TXD of U1 connects telecommunication circuit
The second communication ends T, the power end VDD of U1 connects one end of C9 and the positive pole of EC, the positive pole of EC respectively
For connecting power supply, the first signal input part ADC0 of U1 connects the outfan OUT of current detection circuit,
The secondary signal input ADC1 of U1 connects the 3rd signal of the outfan OUT, U1 of voltage detecting circuit
Input ADC2 connects the outfan OUT, the input IN of program burn-back circuit of temperature sensing circuit and is used for
Connect fever writes, the other end of earth terminal SGND, C7 of U1, the other end of C8, the other end of C9 and
The negative pole of EC is respectively used to even earth terminal.
In the present embodiment, the model of control chip U1 can be N79E814A820/SOP-20, many when including
During individual temperature sensing circuit, the outfan of other temperature sensing circuit can connect the letter of control chip U1
Number input ADC3, ADC4, ADC5, ADC6, fever writes can be by program burn-back circuit by journey
Sequence write control chip U1, electric capacity C7-C9 are used for low frequency filtering for High frequency filter, polar capacitor EC,
Control circuit is additionally operable to output electric current and predetermined current are compared, entered with predeterminated voltage by tertiary voltage
Row compares and temperature is compared with preset temperature, when output electric current is more than predetermined current, the 3rd electricity
When pressure is more than preset temperature more than predeterminated voltage or temperature, will be to telecommunication circuit output abnormality signal.
As a kind of possible embodiment, control circuit can also include crystal oscillator pipe X, wherein:
One end of X connects one end of C7, and the other end of X connects one end of C8.
As a kind of possible embodiment, program burn-back circuit can include burning program port, resistance
R13-R14, electric capacity C10, wherein:
In burning program port, one end of the first port 1 connects one end of R13, one end of C10 and U1 respectively
Reset terminal RESET, burns one end of the second port 2 in program port and connects the clock end ICPCLK of U1, burn
In program port, one end of the 3rd port 3 connects one end of R14, burns one end of the 4th port 4 in program port
The other end of data terminal ICPDATA, R13 and the other end of R14 that connect U1 are respectively used to connect power supply,
In the other end of C10 and burning program port, one end of fifth port 5 is respectively used to even earth terminal, burns program end
The other end of the first port 1, the other end of the second port 2, the other end of the 3rd port 3, the 4th end in Kou
The mouth other end of 4 and the other end of fifth port 5 are respectively used to connect fever writes.
As a kind of possible embodiment, telecommunication circuit can include resistance R15-R20, electric capacity
C11-C12, communication chip U2, wherein:
The data output end RO of U2 connects one end of R15, the other end of R15 connect respectively R16 one end and
First communication ends RXD of U1, reception Enable Pin RE of U2 and drive Enable Pin DE to connect the of U1 respectively
Two input and output I/O ends, the driving input DI of U2 connects one end of R17, and the other end of R17 connects respectively
Connecing one end of R18 and second communication ends TXD of U1, one end of in-phase end A and R19 of U2 is used for connecting aobvious
Showing equipment, the other end of end of oppisite phase B and R19 of U is used for connecting display device, and the power end VCC of U2 divides
Not connecting one end of C11, one end of C12 and one end of R20, the other end of R20 is used for connecting power supply, R16
The other end, the other end of R18, the other end of ground end SGND, C11 of U2 and the other end of C12 divide
Yong Yu not connect earth terminal.
In the present embodiment, the model of communication chip U2 can be MAX485/SOP-8, and telecommunication circuit also may be used
It is sent to display device so that the abnormal signal of control circuit is converted to digital signal, in order to display device root
Send the instruction of roof-cut resistence power supply, i.e. target instruction target word to communication equipment according to abnormal signal, communication power supply will
This instruction is converted to analogue signal and is sent to control circuit, and this instruction of conversion is sent to out by control circuit
Close power supply, in order to Switching Power Supply roof-cut resistence.
At the Switching Power Supply observation circuit described by Fig. 2, current detection circuit, voltage detecting can be passed through
Circuit and temperature sensing circuit detect successively Switching Power Supply output electric current, the output voltage of Switching Power Supply and
The temperature of Switching Power Supply, such that it is able to monitoring switch source current, voltage and temperature in real time.
Above Switching Power Supply observation circuit disclosed in this utility model embodiment is described in detail, this
Literary composition applies specific case principle of the present utility model and embodiment are set forth, above enforcement
The explanation of example is only intended to help to understand method of the present utility model and core concept thereof；Simultaneously for this
The those skilled in the art in field, according to thought of the present utility model, in detailed description of the invention and range of application
On all will change, in sum, this specification content should not be construed as limit of the present utility model
System.
Claims (10)
1. a Switching Power Supply observation circuit, it is characterised in that include current detection circuit, voltage detecting circuit, temperature sensing circuit, control circuit and telecommunication circuit, wherein:
nullThe input IN of described current detection circuit is used for connecting described Switching Power Supply，The outfan OUT of described current detection circuit connects the first signal input part IN1 of described control circuit，The input IN of described voltage detecting circuit is used for connecting described Switching Power Supply，The outfan OUT of described voltage detecting circuit connects the secondary signal input IN2 of described control circuit，The input IN of described temperature sensing circuit is used for connecting described Switching Power Supply，The outfan OUT of described temperature sensing circuit connects the 3rd signal input part IN3 of described control circuit，First outfan OUT1 of described control circuit is used for connecting described Switching Power Supply，Second outfan OUT2 of described control circuit connects the input IN of described telecommunication circuit，First communication ends R of described control circuit connects the first communication ends R of described telecommunication circuit，Second communication ends T of described control circuit connects the second communication ends T of described telecommunication circuit，The third communication end C1 and fourth communication end C2 of described telecommunication circuit is respectively used to connect display device；
Described current detection circuit, for the first voltage of detecting in described Switching Power Supply in preset resistance, is the second voltage by described first voltage amplification and is sent to described control circuit；
Described voltage detecting circuit, for detecting the tertiary voltage of described switched power output, is the 4th voltage by described tertiary voltage blood pressure lowering and is sent to described control circuit；
Described temperature sensing circuit, for detecting the 5th voltage of the outfan of described Switching Power Supply, is the 6th voltage by described 5th voltage step-down and is sent to described control circuit；
Described control circuit, for the output electric current according to Switching Power Supply described in described second voltage and described preset resistance computing the resistor value, described tertiary voltage is calculated according to described 4th voltage, voltage temperature relation table according to described 6th voltage and storage determines the temperature of described switched power output, and described output electric current, described tertiary voltage and described temperature are sent to described telecommunication circuit；
Described telecommunication circuit, for being digital signal by described output electric current, described tertiary voltage and described temperature transition and being sent to described display device, and receive the target instruction target word that described display device sends, described target instruction target word is converted to analogue signal and is sent to described control circuit；
Described control circuit, is additionally operable to the described target instruction target word of conversion is sent to described Switching Power Supply.
Switching Power Supply observation circuit the most according to claim 1, it is characterised in that described current detection circuit includes resistance R1-R7, electric capacity C1-C6, amplifier A, wherein:
nullOne end of described R1 is used for connecting described Switching Power Supply，The other end of described R1 connects one end of described R2 respectively、One end of described C1、One end of described C2、One end of described C3 and the reverse input end of described A，The other end of described C1 connects the positive input of described A respectively、One end of described C4、One end of described R3 and one end of described R4，The power end of described A connects one end and one end of described C5 of described R5 respectively，The other end of described R5 is used for connecting power supply，The outfan of described A、The other end of described C2、The other end of described R2、One end of described C6、One end of described R6 connects the outfan as described current detection circuit，The other end of described R6 connects one end of described R7，The other end of described R3、The other end of described R4、The other end of described C3、The other end of described C4、The earth terminal of described A、The other end of described C5、The other end of described C6 and the other end of described R7 are respectively used to even earth terminal.
Switching Power Supply observation circuit the most according to claim 2, it is characterised in that described current detection circuit also includes resistance R8, wherein:
One end of described R8 connects the outfan of described A, and the other end of described R8 is as the outfan of described current detection circuit.
4. according to the Switching Power Supply observation circuit described in any one of claim 1-3, it is characterised in that described voltage detecting circuit includes resistance R9-R10, wherein:
One end of described R9 is used for connecting described Switching Power Supply, and the other end of described R9 is connected the outfan as described voltage detecting circuit with one end of described R10, and the other end of described R10 is for even earth terminal.
Switching Power Supply observation circuit the most according to claim 4, it is characterised in that described voltage detecting circuit also includes resistance R11, wherein:
Described R11 is connected in parallel with described R10.
Switching Power Supply observation circuit the most according to claim 5, it is characterised in that described temperature sensing circuit includes critesistor N, resistance R12, wherein:
One end of described N is used for connecting described Switching Power Supply, and the other end of described N is connected the outfan as described temperature sensing circuit with one end of described R12, and the other end of described R12 is for even earth terminal.
Switching Power Supply observation circuit the most according to claim 6, it is characterised in that described control circuit includes control chip U1, program burn-back circuit, electric capacity C7-C9, polar capacitor EC, wherein:
nullThe first input/output terminal I/O of described U1 is used for connecting described Switching Power Supply，The clock end ICPCLK of described U1 connects the first outfan OUT1 of described program burn-back circuit，The data terminal ICPDATA of described U1 connects the second outfan OUT2 of described program burn-back circuit，The reset terminal RESET of described U1 connects the 3rd outfan OUT3 of described program burn-back circuit，The first frequency vibration end XTAL1 of described U1 connects one end of described C7，The second frequency vibration end XTAL2 of described U1 connects one end of described C8，The second input and output I/O end of described U1 connects the input IN of described telecommunication circuit，First communication ends RXD of described U1 connects the first communication ends R of described telecommunication circuit，Second communication ends TXD of described U1 connects the second communication ends T of described telecommunication circuit，The power end VDD of described U1 connects one end and the positive pole of described EC of described C9 respectively，The positive pole of described EC is used for connecting power supply，The first signal input part ADC0 of described U1 connects the outfan OUT of described current detection circuit，The secondary signal input ADC1 of described U1 connects the outfan OUT of described voltage detecting circuit，The 3rd signal input part ADC2 of described U1 connects the outfan OUT of described temperature sensing circuit，The input IN of described program burn-back circuit is used for connecting fever writes，The earth terminal SGND of described U1、The other end of described C7、The other end of described C8，The other end of described C9 and the negative pole of described EC are respectively used to even earth terminal.
Switching Power Supply observation circuit the most according to claim 7, it is characterised in that described control circuit also includes crystal oscillator pipe X, wherein:
One end of described X connects one end of described C7, and the other end of described X connects one end of described C8.
Switching Power Supply observation circuit the most according to claim 8, it is characterised in that described program burn-back circuit includes burning program port, resistance R13-R14, electric capacity C10, wherein:
nullIn described burning program port, one end of the first port 1 connects one end of described R13 respectively、One end of described C10 and the reset terminal RESET of described U1，In described burning program port, one end of the second port 2 connects the clock end ICPCLK of described U1，In described burning program port, one end of the 3rd port 3 connects one end of described R14，In described burning program port, one end of the 4th port 4 connects the data terminal ICPDATA of described U1，The other end of described R13 and the other end of described R14 are respectively used to connect power supply，In the other end of described C10 and described burning program port, one end of fifth port 5 is respectively used to even earth terminal，The other end of the first port 1 in described burning program port、The other end of the second port 2、The other end of the 3rd port 3、The other end of the 4th port 4 and the other end of fifth port 5 are respectively used to connect described fever writes.
Switching Power Supply observation circuit the most according to claim 9, it is characterised in that described telecommunication circuit includes resistance R15-R20, electric capacity C11-C12, communication chip U2, wherein:
nullThe data output end RO of described U2 connects one end of described R15，The other end of described R15 connects one end of described R16 and first communication ends RXD of described U1 respectively，Reception Enable Pin RE of described U2 and driving Enable Pin DE connect the second input and output I/O end of described U1 respectively，The driving input DI of described U2 connects one end of described R17，The other end of described R17 connects one end of described R18 and second communication ends TXD of described U1 respectively，One end of the in-phase end A and described R19 of described U2 is used for connecting described display device，The other end of the end of oppisite phase B and described R19 of described U2 is used for connecting described display device，The power end VCC of described U2 connects one end of described C11 respectively、One end of described C12 and one end of described R20，The other end of described R20 is used for connecting power supply，The other end of described R16、The other end of described R18、The ground end SGND of described U2、The other end of described C11 and the other end of described C12 are respectively used to even earth terminal.
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| CN201620076280.9U CN205749843U (en) | 2016-01-26 | 2016-01-26 | A kind of Switching Power Supply observation circuit |
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| CN201620076280.9U CN205749843U (en) | 2016-01-26 | 2016-01-26 | A kind of Switching Power Supply observation circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358295A (en) * | 2018-09-20 | 2019-02-19 | 北京时代民芯科技有限公司 | A kind of power failure indicating circuit applied to DC-DC |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358295A (en) * | 2018-09-20 | 2019-02-19 | 北京时代民芯科技有限公司 | A kind of power failure indicating circuit applied to DC-DC |
| CN109358295B (en) * | 2018-09-20 | 2021-06-08 | 北京时代民芯科技有限公司 | Power failure indicating circuit applied to DC-DC |
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