CN209731067U - A kind of power circuit based on decompression detection - Google Patents
A kind of power circuit based on decompression detection Download PDFInfo
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- CN209731067U CN209731067U CN201920768405.8U CN201920768405U CN209731067U CN 209731067 U CN209731067 U CN 209731067U CN 201920768405 U CN201920768405 U CN 201920768405U CN 209731067 U CN209731067 U CN 209731067U
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Abstract
The utility model relates to a kind of power circuits based on decompression detection, including power supply interface, the twitter circuit that disappears, voltage conversion circuit and detection alert circuit；The twitter circuit that disappears is coupled to power supply interface to receive initial voltage signal and remove the ripple in initial voltage signal, voltage conversion circuit, which is coupled to, disappears twitter circuit to receive initial voltage signal and be converted to the nominal voltage signal suitable for chip operation, detection alert circuit is coupled to voltage conversion circuit and for detecting to nominal voltage signal, when nominal voltage signal is more than the voltage that chip can bear, detection alert circuit carries out warning reminding.The utility model can detect the supply voltage after decompression and be prompted, to reduce the damage of chip.
Description
Technical field
The utility model relates to the technical fields of power supply, more particularly, to a kind of power circuit based on decompression detection.
Background technique
Currently, there are some functions on gap, especially circuit board in voltage needed for element different on circuit board
Property chip, since the general voltage rating of chip is in 3.3V between 3.6V, and the voltage of general power supply is greater than
The voltage in this section, cause chip on circuit board can not work once electrified, in the prior art, can generally design one kind can reduce
The power supply circuit of supply voltage, these design power supply circuits solve the problems, such as presently, there are decompression, but these decompression electricity
After road reduces supply voltage, just directly feed and worked to chip with flip chip, in this process, not to decompression after
Supply voltage is detected, and the supply voltage after decompression is still higher than the voltage rating of chip, to lead to the damage of chip.
Utility model content
The purpose of the utility model is to provide a kind of power circuits based on decompression detection, the power supply electricity after can detect decompression
It presses and is prompted, to reduce the damage of chip.
The above-mentioned purpose of utility model of the utility model has the technical scheme that a kind of based on decompression
The power circuit of detection, including power supply interface, the twitter circuit that disappears, voltage conversion circuit and detection alert circuit；Described disappear trembles
Circuit is coupled to power supply interface to receive initial voltage signal and remove the ripple in initial voltage signal, and the voltage turns
It changes circuit and is coupled to and disappear twitter circuit to receive initial voltage signal and be converted to the nominal voltage signal suitable for chip operation, institute
Detection alert circuit is stated to be coupled to the voltage conversion circuit and be used to detect nominal voltage signal, once voltage rating
When signal is more than the voltage that chip can bear, the detection alert circuit carries out warning reminding.
By using above-mentioned technical proposal, after power supply orifice power supply, the voltage signal of power supply into
Enter to voltage conversion circuit and be converted into the nominal voltage signal of suitable chip operation, nominal voltage signal is entering core at this time
During piece is worked with flip chip, the real-time voltage detection of alert circuit after testing, when detecting after conversion
When the voltage rating that nominal voltage signal is born still above chip, detection alert circuit carries out warning reminding, in order to cut off
The circuit connection of chip, to reduce the damage of chip.
Preferably, the output end of the voltage conversion circuit is coupled with protection diode D1, the sun of the protection diode
Extreme ground connection, cathode terminal are coupled to the output end of the voltage conversion circuit.
By using above-mentioned technical proposal, by the way that protection diode is arranged, as the larger Shi Kezhi of voltage after decompression
It returns and wears protection diode to ground terminal, and then circuit can be protected.
It preferably, further include filter circuit, the filter circuit is coupled to the output end of the voltage conversion circuit to connect
Crop determining voltage signal simultaneously removes the interference signal in nominal voltage signal.
By using above-mentioned technical proposal, the interference signal in nominal voltage signal can be removed, so that entering in chip
Voltage signal it is purer.
Preferably, protection circuit has been also coupled between the filter circuit and the voltage conversion circuit.
By using above-mentioned technical proposal, circuit is protected by setting, further circuit can be protected.
Preferably, the output end of the voltage conversion circuit is also coupled to the resistance R5 that resistance value is 0 ohm.
By using above-mentioned technical proposal, since 0 Europe resistor current ability to bear is weaker, the voltage after decompression is still
Higher than the voltage rating of chip, resistance R5 can directly fuse, thus disconnecting circuit.
Preferably, the detection alert circuit includes voltage sensor, voltage comparator circuit and warning circuit；The voltage
Sensor is for detecting the voltage after conversion and being converted to voltage detection signal；The voltage comparator circuit is coupled to voltage
Sensor simultaneously judged according to voltage detection signal, and voltage detection signal be more than chip can bear voltage value when it is defeated
Signal is judged out；The warning circuit is coupled to the output end of voltage comparator circuit, and according to judging that signal carries out warning reminding.
By using above-mentioned technical proposal, voltage of the voltage sensor detection after conversion passes through voltage comparator circuit
After being judged, warning circuit is recycled to carry out warning reminding.
Preferably, the warning circuit includes switching circuit, interval signal output circuit and buzzer SP, the switch electricity
Road is coupled to the output end of the voltage comparator circuit to receive and judge signal and export enabling signal, the interval signal output
Circuit is coupled to switching circuit to receive enabling signal and export interruption trigger signal, and the buzzer SP receives interruption triggering letter
Number and in response to interruption trigger signal carry out sounding alarm.
By using above-mentioned technical proposal, buzzer is triggered by setting interval signal output circuit and carries out sounding work,
So that buzzer carries out discontinuous work sounding, remind effect more preferable.
Preferably, the interval signal output circuit includes filter module, resistance R9, R11, R12, capacitor C6 and compares
Device A2, one end of resistance R9 and R11 are coupled to the voltage comparator circuit, and one end of resistance R9 is coupled to one end of capacitor C6,
The other end of capacitor C6 is coupled to filter module, and the other end of the other end of capacitor C6 also with resistance R11 is coupled to comparator
The reverse side of the in-phase end of A2, comparator A2 is grounded by resistance R12, and the output end of comparator A2 is coupled to buzzer SP.
By using above-mentioned technical proposal, it can judge that signal carries out the output of discontinuous to what is received, so that buzzer
SP can with compartment receive interruption trigger signal, to realize discontinuous sounding.
In conclusion the advantageous effects of the utility model are as follows:
By setting voltage conversion circuit and detection alert circuit, the voltage after decompression can be detected and be reminded, with
Convenient for cutting off the circuit connection of chip, the damage of chip is reduced.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the structural schematic diagram that alert circuit is detected in the utility model.
In figure, 1, power interface；2, disappear twitter circuit；3, voltage conversion circuit；4, alert circuit is detected；5, filter circuit；
6, circuit is protected；7, voltage sensor；8, voltage comparator circuit；9, reference circuit；10, warning circuit；11, switching circuit；12,
Interval signal output circuit；13, filter module.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Referring to Fig.1, Fig. 2, for a kind of power circuit based on decompression detection disclosed by the utility model, including power supply
Interface 1, the twitter circuit 2 that disappears, voltage conversion circuit 3 and detection alert circuit 4.
Voltage provided by the power supply that power supply interface 1 is connected is preferably the direct current of 5V, and the direct current of 5V
Electric to have some interference, referred to as ripple above, the twitter circuit 2 that disappears is coupled to power supply interface 1 and is mentioned with receiving power supply
The initial voltage signal of confession simultaneously removes the ripple in initial voltage signal, to reduce the noise jamming on circuit, so as to chip
Power supply it is cleaner；Voltage conversion circuit 3, which is coupled to, disappears twitter circuit 2 to receive initial voltage signal and be converted to suitable for core
The nominal voltage signal of piece work, it is preferred that the voltage rating of chip is 3.3V in the present embodiment；Alert circuit 4 is detected to couple
In voltage conversion circuit 3 and for being detected to nominal voltage signal, once nominal voltage signal can bear more than chip
Voltage when, detection alert circuit 4 carry out warning reminding.
The twitter circuit 2 that disappears includes the capacitor C1 that capacitance is 100nF, and one end of capacitor C1 is coupled to the input voltage of 5V, separately
One end ground connection；Capacitor C2 that the decompression chip U of voltage conversion circuit 3 including model L5972D, capacitance are 100pF, capacitance are
The capacitor C3 and resistance value of 100nF is the resistance R1 of 3.3K, and 8 feet of decompression chip U are coupled to the input voltage of 5V, and 4 feet are coupled to
One end of capacitor C2, C3, the other end of capacitor C3 are coupled to one end of resistance R1, and the other end of resistance R1 is another with capacitor C2's
End is grounded, and 2 feet, 3 feet, 6 feet and 7 feet are grounded；The output end of voltage conversion circuit 3 is coupled with protection diode D1, protection
The anode tap of diode D1 is grounded, and cathode terminal is coupled to 1 foot of decompression chip U to receive the voltage signal after decompression.
It further include protection circuit 6, filter circuit 5, protection circuit 6 is coupled to 5 feet of decompression chip U, and filter circuit 5 couples
In protection circuit 6 to receive the nominal voltage signal after decompression and remove the interference signal in voltage signal；Protect circuit 6
Including resistance value be 3.3K resistance R2, resistance value be 5.6K resistance R3；Filter circuit 5 includes the resistance R4 that resistance value is 2.2K, holds
The polar capacitor C5 that the capacitor C4 and capacitance that value is 100nF are 220uF；5 feet of decompression chip U are coupled to the one of resistance R2, R3
End, the other end ground connection of resistance R2, the other end of resistance R3 are coupled to one end of capacitor C4, and the other end of capacitor C4 is coupled to pole
Property the cathode of capacitor C5 and one end of resistance R4, the other end of resistance R4 be coupled to detection alert circuit 4, be depressured 1 foot of chip U
It is further coupled to the anode of polar capacitor C5, and is the voltage rating that 0 ohm of resistance R5 is coupled to 3.3V by there is resistance value.
Referring to Fig. 2, detection alert circuit 4 includes voltage sensor 7, voltage comparator circuit 8 and warning circuit 10；Voltage passes
Sensor 7 is for detecting the supply voltage after conversion and being converted to voltage detection signal, and the model of voltage sensor 7 is preferred
For JLD1U；Voltage comparator circuit 8 is coupled to voltage sensor 7 and is judged according to voltage detection signal, and in voltage detecting
Output judges signal when signal is more than the voltage value that chip can bear；Warning circuit 10 is coupled to the defeated of voltage comparator circuit 8
Outlet, and according to judge signal carry out warning reminding.
Voltage comparator circuit 8 includes resistance R6, comparator A1 and reference circuit 9, and the model of comparator A1 is preferably
LM311, reference circuit 9 is for voltage value, i.e. reference voltage upper limit signal, preferably 3.3V needed for providing chip；Comparator
The in-phase end of A1 is coupled to voltage sensor 7 by resistance R6, and it is defeated to obtain reference circuit 9 that reverse side is coupled to reference circuit 9
Reference voltage upper limit signal out.
Reference circuit 9 includes resistance R7 and potentiometer Rp1, and the model of potentiometer Rp1 is preferably 3296X-502, resistance R7
One end be coupled to VCC voltage, the other end is coupled to the reverse side and potentiometer Rp1 of comparator A1, and potentiometer Rp1's is another
End ground connection；Tie point between resistance R7 and potentiometer Rp1 provides upper limit signal Vref1, can be adjusted by adjusting potentiometer Rp1
Save the size of upper limit signal Vref1.
Warning circuit 10 includes switching circuit 11, interval signal output circuit 12 and buzzer SP, and switching circuit 11 couples
Judge signal to receive in the output end of voltage comparator circuit 8 and export enabling signal, interval signal output circuit 12 is coupled to
Switching circuit 11 to receive enabling signal and export interruption trigger signal, buzzer SP receive interruption trigger signal and in response to
Disconnected trigger signal carries out sounding alarm.
Switching circuit 11 includes resistance R8, triode Q1, and the base stage of triode Q1 is coupled to comparator A1 by resistance R8
Output end, the emitter ground connection of triode Q1, collector is coupled to interval signal output circuit 12 and exports enabling signal.
Interval signal output circuit 12 includes filter module 13, resistance R9, R11, R12, capacitor C6 and comparator A2, than
Model compared with device A2 is preferably LM311, and filter module 13 includes resistance R10 and capacitor C7 parallel with one another, resistance R9's and R11
One end is coupled to the output end of comparator A1, and the other end of resistance R9 is coupled to one end of capacitor C6, the other end coupling of capacitor C6
Be connected to one end of resistance R10 Yu capacitor C7, the other end of resistance R10 and capacitor C7 are grounded, and the other end of capacitor C6 also with electricity
The other end of resistance R11 is coupled to the in-phase end of comparator A2, and the reverse side of comparator A2 is grounded by resistance R12, comparator A2
Output end be coupled to one end of buzzer SP, the other end of buzzer SP is coupled to Vcc voltage.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (8)
1. it is a kind of based on decompression detection power circuit, it is characterised in that: including power supply interface (1), the twitter circuit that disappears (2),
Voltage conversion circuit (3) and detection alert circuit (4)；The twitter circuit that disappears (2) is coupled to power supply interface (1) to receive
Initial voltage signal simultaneously removes the ripple in initial voltage signal, the voltage conversion circuit (3) be coupled to the twitter circuit that disappears (2) with
It receives initial voltage signal and is converted to the nominal voltage signal suitable for chip operation, detection alert circuit (4) coupling
In the voltage conversion circuit (3) and for being detected to nominal voltage signal, once nominal voltage signal is more than chip institute
When the voltage that can be born, the detection alert circuit (4) carries out warning reminding.
2. a kind of power circuit based on decompression detection according to claim 1, it is characterised in that: the voltage conversion electricity
The output end on road (3) is coupled with protection diode D1, the anode tap ground connection of the protection diode, and cathode terminal is coupled to the electricity
The output end of voltage conversion circuit (3).
3. a kind of power circuit based on decompression detection according to claim 1, it is characterised in that: further include filter circuit
(5), the filter circuit (5) is coupled to the output end of the voltage conversion circuit (3) to receive nominal voltage signal and remove
Interference signal in nominal voltage signal.
4. a kind of power circuit based on decompression detection according to claim 3, it is characterised in that: the filter circuit
(5) it has been also coupled between the voltage conversion circuit (3) protection circuit (6).
5. a kind of power circuit based on decompression detection according to claim 1, it is characterised in that: the voltage conversion electricity
The output end on road (3) is also coupled to the resistance R5 that resistance value is 0 ohm.
6. a kind of power circuit based on decompression detection according to claim 1, it is characterised in that: electricity is reminded in the detection
Road (4) includes voltage sensor (7), voltage comparator circuit (8) and warning circuit (10)；The voltage sensor (7) is for examining
Survey by conversion after voltage and be converted to voltage detection signal；The voltage comparator circuit (8) is coupled to voltage sensor (7)
And judged according to voltage detection signal, and the output judgement when voltage detection signal is more than the voltage value that chip can bear
Signal；The warning circuit (10) is coupled to the output end of voltage comparator circuit (8), and mentions according to judging that signal alarm
It wakes up.
7. a kind of power circuit based on decompression detection according to claim 6, it is characterised in that: the warning circuit
It (10) include that switching circuit (11), interval signal output circuit (12) and buzzer SP, the switching circuit (11) are coupled to institute
The output end of voltage comparator circuit (8) is stated to receive and judge signal and export enabling signal, the interval signal output circuit
(12) switching circuit (11) is coupled to receive enabling signal and export interruption trigger signal, and the buzzer SP receives interruption touching
It signals and carries out sounding alarm in response to interruption trigger signal.
8. a kind of power circuit based on decompression detection according to claim 7, it is characterised in that: the interval signal is defeated
Circuit (12) includes filter module (13), resistance R9, R11, R12, capacitor C6 and comparator A2 out, and the one of resistance R9 and R11
End is coupled to the voltage comparator circuit (8), and one end of resistance R9 is coupled to one end of capacitor C6, the other end coupling of capacitor C6
In filter module (13), and the other end of capacitor C6 is also coupled to the in-phase end of comparator A2 with the other end of resistance R11, compares
The reverse side of device A2 is grounded by resistance R12, and the output end of comparator A2 is coupled to buzzer SP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920768405.8U CN209731067U (en) | 2019-05-25 | 2019-05-25 | A kind of power circuit based on decompression detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920768405.8U CN209731067U (en) | 2019-05-25 | 2019-05-25 | A kind of power circuit based on decompression detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209731067U true CN209731067U (en) | 2019-12-03 |
Family
ID=68673534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920768405.8U Expired - Fee Related CN209731067U (en) | 2019-05-25 | 2019-05-25 | A kind of power circuit based on decompression detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209731067U (en) |
-
2019
- 2019-05-25 CN CN201920768405.8U patent/CN209731067U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191203 |