CN109245051A - A kind of supply convertor - Google Patents
A kind of supply convertor Download PDFInfo
- Publication number
- CN109245051A CN109245051A CN201810985135.6A CN201810985135A CN109245051A CN 109245051 A CN109245051 A CN 109245051A CN 201810985135 A CN201810985135 A CN 201810985135A CN 109245051 A CN109245051 A CN 109245051A
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- Prior art keywords
- temperature
- pin
- supply
- circuit
- supply convertor
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The embodiment of the invention provides a kind of supply convertor, which includes: temperature monitoring circuit, voltage transmission circuit and supply convertor ontology；The voltage transmission circuit, the supply voltage for providing the first external power supply are transferred to the supply convertor ontology；The temperature monitoring circuit is connected with the enable pin of the supply convertor ontology, for monitoring whether environment temperature is greater than preset set temperature, if so, to the enable pin input low level；The supply convertor ontology stops being external load supplying using the supply voltage of the voltage transmission circuit transmission when for receiving the low level of the temperature monitoring circuit input in the enable pin.Therefore, scheme provided in an embodiment of the present invention can reduce the probability that supply convertor is damaged.
Description
Technical field
The present embodiments relate to technical field of electronic products, more particularly to a kind of supply convertor.
Background technique
Supply convertor is a kind of control equipment for being related to power conversion, since it can carry out the variation of different voltages,
Therefore it is widely used in circuit.
Currently, supply convertor can convert the supply voltage that external power supply provides, and by transformed electricity
Pressure is transferred to load.But environment locating for supply convertor can be changed with its application scenarios, be gone out in supply convertor
When existing inoperative, user could have found supply convertor exception.
As it can be seen that existing mode, only when supply convertor is inoperative, user could have found supply convertor exception,
And when inoperative supply convertor occur irreversible damage probability it is higher.
Summary of the invention
In view of this, the embodiment of the present invention proposes a kind of supply convertor, main purpose is that power supply change can be reduced
The probability that parallel operation is damaged.
The embodiment of the invention provides a kind of supply convertor, which includes:
Temperature monitoring circuit, voltage transmission circuit and supply convertor ontology；
The voltage transmission circuit, the supply voltage for providing the first external power supply are transferred to the power conversion
Device ontology；
The temperature monitoring circuit is connected, for monitoring environment temperature with the enable pin of the supply convertor ontology
Whether preset set temperature is greater than, if so, to the enable pin input low level；
The supply convertor ontology, for receiving the low electricity of the temperature monitoring circuit input in the enable pin
Usually, stop being external load supplying using the supply voltage of the voltage transmission circuit transmission.
Optionally,
The temperature monitoring circuit, comprising: temperature monitor and temperature set sub-circuit；
First pin of the temperature monitor is connected with the enable pin, and the second pin is connected with second source, the
Three-prong is connected with ground wire, and the 4th pin is connected with the first end of temperature setting sub-circuit；
The first end of temperature setting sub-circuit is connected with the 4th pin of the temperature monitor, second end with it is described
Ground wire is connected.
Optionally,
Relationship between the all-in resistance and the set temperature of the temperature setting sub-circuit meets formula (1)；
R=a × T2-b×T+c (1)
Wherein, the R characterizes all-in resistance, the unit of the temperature setting sub-circuit: kilo-ohm；The T characterizes the setting
Temperature, unit: degree Celsius；The a characterizes the first coefficient；The b characterizes the second coefficient；The c characterizes correction constant.
Optionally,
The temperature monitoring circuit, further includes: first diode；
The anode of the first diode is connected with the first pin of the temperature monitor；The first diode is born
Pole is connected with the enable pin.
Optionally,
It include: first resistor in the temperature setting sub-circuit；
The first end of the first resistor is connected with the 4th pin of the temperature monitor, second end and the ground wire phase
Even.
Optionally,
It include: second resistance and at least one resistor assembly in the temperature setting sub-circuit, wherein described in each
3rd resistor and switch element are respectively included in resistor assembly；
In each described resistor assembly:
The first end of the 3rd resistor distinguish the second resistance first end and the temperature monitor the 4th
Pin is connected；Second end is connected with the first end of the switch element；
The first end of the switch element is connected with the second end of the 3rd resistor, and second end is connected with ground wire, is used for
It is connected in the case where receiving conducting triggering, connected 3rd resistor is connected in parallel with the second resistance；Wherein, the switch member
Part is triode or metal-oxide-semiconductor.
Optionally,
In temperature setting sub-circuit further include: at least one independent switch, the quantity of the independent switch with it is described
The quantity of resistor assembly is identical；
Each described independent switch is connected with the switch element in a resistor assembly respectively, for leading in external
Conducting triggering is carried out to the connected switch element under logical triggering.
Optionally,
In the temperature setting sub-circuit further include: control chip；
In the control chip include multiple pins, wherein each described pin respectively with a resistor assembly
In switch element be connected；
The control chip, under external conducting triggering, at least one described resistor assembly include to
A few target switch element carries out conducting triggering.
Optionally,
The voltage transmission circuit, respectively with the voltage input pipe of the enable pin and the supply convertor ontology
Foot is connected, and the supply voltage for providing first power supply is passed by the enable pin and the voltage input pin
It is defeated by the supply convertor ontology.
Optionally,
The supply convertor ontology, the supply voltage for being also used to receive in the enable pin are less than preset
When voltage threshold, stop being the load supplying using the supply voltage of the voltage transmission circuit transmission.
Optionally,
The voltage transmission circuit, comprising: the second diode；
The anode of second diode is connected with first power supply and the voltage input pin respectively；Described
The cathode of two diodes is connected with the enable pin.
Optionally,
The voltage transmission circuit, comprising: self- recoverage insures resistance；
The first end of the self- recoverage insurance resistance is connected with first power supply；The second of the self- recoverage insurance resistance
End is connected with the voltage input pin and the enable pin respectively.
Optionally,
It further include informing pin in the supply convertor ontology；
It is described to inform that pin is connected with external annunciator；
The supply convertor ontology, for passing through institute when stopping using the supply voltage is the load supplying
It states and informs that pin sends abnormal electrical power supply signal to the annunciator.
The embodiment of the invention provides a kind of supply convertor, which includes temperature monitoring circuit, voltage biography
Transmission of electricity road and supply convertor ontology.Wherein, temperature monitoring circuit is connected with the enable pin of supply convertor ontology, and temperature
Degree monitoring circuit inputs low electricity when monitoring environment temperature greater than preset set temperature, to the enable pin of power source change device
It is flat.The supply voltage that voltage transmission circuit provides external power supply is transferred to supply convertor ontology.Supply convertor ontology exists
When enable pin receives the low level of temperature monitoring circuit input, illustrate that environment temperature then stops utilizing voltage transmission electricity extremely
The supply voltage of road transmission is load supplying.By above-mentioned it is found that temperature monitoring circuit in scheme provided in an embodiment of the present invention
When monitoring abnormal conditions of the environment temperature greater than set temperature, low electricity is inputted to the enable pin of supply convertor ontology
It is flat, so that the low level that supply convertor ontology is received according to enable pin stops powering for external loading in time, to make
Supply convertor is obtained to stop working in time in environment temperature exception.Therefore, scheme provided in an embodiment of the present invention can reduce
The probability that supply convertor is damaged.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 shows a kind of structural schematic diagram of supply convertor provided by one embodiment of the present invention；
Fig. 2 shows a kind of structural schematic diagrams for supply convertor that another embodiment of the present invention provides；
Fig. 3 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Fig. 4 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Fig. 5 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Fig. 6 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Fig. 7 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Fig. 8 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Fig. 9 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Figure 10 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Figure 11 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides；
Figure 12 shows a kind of structural schematic diagram for supply convertor that another embodiment of the invention provides.
Specific embodiment
It is described more fully the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The exemplary embodiment opened, it being understood, however, that may be realized in various forms the disclosure without the implementation that should be illustrated here
Example is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the model of the disclosure
It encloses and is fully disclosed to those skilled in the art.
As shown in Figure 1, the embodiment of the invention provides a kind of supply convertor, which includes:
Temperature monitoring circuit 101, voltage transmission circuit 102 and supply convertor ontology 103；
The voltage transmission circuit 102, the supply voltage for providing the first external power supply are transferred to the power supply
Converter ontology 103；
The temperature monitoring circuit 101 is connected, for supervising with the enable pin 1031 of the supply convertor ontology 103
Whether control environment temperature is greater than preset set temperature, if so, to 1031 input low level of enable pin；
The supply convertor ontology 103, for receiving the temperature monitoring circuit 101 in the enable pin 1031
When the low level of input, stop being external load supplying using the supply voltage of the voltage transmission circuit 102 transmission.
Embodiment according to figure 1, the supply convertor include temperature monitoring circuit, voltage transmission circuit and power supply
Converter ontology.Wherein, temperature monitoring circuit is connected with the enable pin of supply convertor ontology, and temperature monitoring circuit is being supervised
When controlling environment temperature greater than preset set temperature, to the enable pin input low level of power source change device.Voltage transmission electricity
The supply voltage that road provides external power supply is transferred to supply convertor ontology.Supply convertor ontology is received in enable pin
When the low level of temperature monitoring circuit input, illustrate that environment temperature then stops the power supply electricity using voltage transmission circuit transmission extremely
Pressure is load supplying.By above-mentioned it is found that temperature monitoring circuit is monitoring environment temperature in scheme provided in an embodiment of the present invention
When degree is greater than the abnormal conditions of set temperature, to the enable pin input low level of supply convertor ontology, so that power conversion
The low level that device ontology is received according to enable pin stops powering for external loading in time, so that supply convertor is in ring
It stops working in time when the temperature anomaly of border.Therefore, scheme provided in an embodiment of the present invention can reduce supply convertor and damage
Bad probability.
In an embodiment of the invention, temperature monitoring circuit 101 is when monitoring environment temperature no more than set temperature, then
Illustrate that environment temperature is normal, then to 1031 input high level of enable pin of supply convertor ontology 103.Then, power conversion
Device ontology 103 continues with voltage transmission electricity when enable pin 1031 receives the high level of the input of temperature monitoring circuit 101
The supply voltage that road 102 is transmitted is load supplying.
In the present embodiment, the height that temperature monitoring circuit 101 is inputted to the enable pin 1031 of supply convertor ontology 103
The size of level can be determined according to specific business need.The size of the high level at least may exist the following two kinds situation:
The first, user selects any one numerical value as high level according to their own needs, for example, user can select 7V as high
Level.Second, the corresponding voltage preset value of enable pin, high level is 75% arbitrary number greater than voltage preset value
Value.For example, voltage preset value is 10V, then high level is any one numerical value greater than 7.5V, for example, 8V.
In an embodiment of the invention, enable pin 1031 of the temperature monitoring circuit 101 to supply convertor ontology 103
The low level size of input can be determined according to specific business need.The low level size at least may exist following two
Kind situation: the first, user selects any one numerical value as low level according to their own needs, for example, user can select
2V is as low level.Second, the corresponding voltage preset value of enable pin, low level is less than the 25% of voltage preset value
Any number.For example, voltage preset value is 10V, then low level is any one numerical value less than 2.5V, for example, 2.4V.
In an embodiment of the invention, the environment temperature that temperature monitoring circuit 101 monitors can be supply convertor institute
The environment temperature at place.Optionally, when power source change device is arranged in open-air atmosphere, environment temperature is just the temperature in natural environment
Degree.When power source change device is arranged in a room, environment temperature is just the temperature in room.It is arranged in power source change device at one
When in the shell of equipment, environment temperature is just the temperature in shell.
In an embodiment of the invention, as shown in Fig. 2, the temperature monitoring circuit 101 may include: temperature monitor
1011 and temperature set sub-circuit 1012；
First pin of the temperature monitor 1011 is connected with the enable pin 1031, the second pin and second source
1013 are connected, and third pin is connected with ground wire, and the 4th pin is connected with the first end of temperature setting sub-circuit 1012；
The first end of the temperature setting sub-circuit 1012 is connected with the 4th pin of the temperature monitor 1011, and second
End is connected with the ground wire.
In the present embodiment, the specific pattern of temperature monitor can be determined according to business need.
In the present embodiment, from figure 2 it can be seen that the first pin A1 of temperature monitor 1011 and supply convertor sheet
The enable pin 1031 of body 103 is connected.Second pin A2 of temperature monitor 1011 is connected with second source VCC1013, wherein
The pattern and voltage swing of second source 1013 can determine that optionally, second source is for voltage according to business need
The power supply of 3.3V or 5V.The third pin A3 of temperature monitor 1011 is connected with ground wire GND.4th pin A4 and temperature setting
The first end B1 of circuit 1012 is connected.Temperature sets the first end B1 of sub-circuit 1012 and the 4th pin of temperature monitor 1011
A4 is connected, and the second end B2 of temperature setting sub-circuit 1012 is connected with ground wire GND.
In the present embodiment, each pin in temperature monitor 1011 can be determined according to actual application.
In an embodiment of the invention, between the all-in resistance and the set temperature of the temperature setting sub-circuit 1012
Relationship meet formula (1)；
R=a × T2-b×T+c (1)
Wherein, the R characterizes the all-in resistance of the temperature setting sub-circuit, unit: kilo-ohm；The T characterizes the setting
Temperature, unit: degree Celsius；The a characterizes the first coefficient；The b characterizes the second coefficient；The c characterizes correction constant；
In the present embodiment, the all-in resistance that set temperature can use temperature setting sub-circuit 1012 is set.
In the present embodiment, the first coefficient, the second coefficient and correction constant can be determined according to business need.It is optional
, being set according to temperature includes locating for the pattern, the type of temperature monitor and supply convertor ontology of resistance in sub-circuit
Environment in environmental factor determine the size of the first coefficient, the second coefficient and correction constant.Optionally, the first coefficient a
It can be 0.0012, the second coefficient b can be 0.9308, and correction constant can be 96.147.
In the present embodiment, for example: when set temperature is 30 DEG C, then son electricity is set according to formula (1) temperature
The all-in resistance on road are as follows:
R=0.0012 × (30)2- 0.9308 × 30+96.147=69k Ω
According to above-described embodiment, set temperature is determining by the all-in resistance of temperature setting sub-circuit, that is, to temperature
The all-in resistance of degree setting sub-circuit is adjusted can set out the set temperature for meeting business demand in advance.Therefore, temperature is utilized
The all-in resistance of setting sub-circuit more convenient, accurately can set set temperature.
In an embodiment of the invention, as shown in figure 3, the temperature monitoring circuit 101 further includes first diode
1014；
The anode of the first diode 1014 is connected with the first pin of the temperature monitor 1011；Described 1st
The cathode of pole pipe 1014 is connected with the enable pin 1031.
In the present embodiment, the type of first diode 1014 can be determined according to specific business demand.Optionally,
One diode 1014 can be germanium diode or silicon diode.
In the present embodiment, as shown in figure 3, the first pin of the anode and temperature monitor 1011 of first diode 1014
A1 is connected.The cathode of first diode 1014 is connected with the enable pin 1031 of supply convertor 103.No matter temperature monitoring circuit
101 to supply convertor 103 1031 input low level of enable pin or high level when, first diode 1014 is both turned on,
So that the level that temperature monitoring circuit 101 transmits can be transferred to enable pin 1031.
It include a diode according to above-described embodiment, in temperature monitoring circuit, therefore in supply convertor ontology
Electric current cannot back flow into temperature monitor, so that reducing temperature monitor the probability damaged occurs.
In an embodiment of the invention, at least there is the following two kinds structure in temperature setting sub-circuit 1012:
The first,
In an embodiment of the invention, as shown in figure 4, including first resistor in temperature setting sub-circuit 1012
1012A；
The first end of the first resistor 1012A is connected with the 4th pin of the temperature monitor 1011, second end with
The ground wire is connected.
In the present embodiment, the specific pattern of first resistor 1012A can be determined according to business need.Optionally, first
Resistance can be fixed resistance or variable resistance.
In the present embodiment, when first resistor is fixed resistance, total resistance value of first resistor is exactly temperature setting son electricity
Total resistance value on road 1012, total resistance value and set temperature should meet formula (1).
In the present embodiment, when first resistor is variable resistance, the resistance value of first resistor currently adjusted is exactly temperature
Total resistance value of degree setting sub-circuit 1012, and the resistance value and set temperature that currently adjust should meet formula (1).
In the present embodiment, as shown in figure 4, the 4th of the first end D1 of first resistor 1012A and temperature monitor 1011 the
Pin A4 is connected, and the second end D2 of first resistor 1012A is connected with ground wire GND.
According to above-described embodiment, due to including comprising only a resistance, circuit structure in temperature setting sub-circuit
It is more succinct.
Second,
In an embodiment of the invention, as shown in figure 5, may include the second electricity in temperature setting sub-circuit 1012
Hinder 1012B and at least one resistor assembly, wherein respectively included in each described resistor assembly 3rd resistor 201 and
Switch element 202；
In each described resistor assembly:
The first end of the 3rd resistor 201 distinguish the second resistance 1012B first end and the monitoring temperature
4th pin of device 1011 is connected；Second end is connected with the first end of the switch element 202；
The first end of the switch element 202 is connected with the second end of the 3rd resistor 201, second end and ground wire phase
Even, for being connected in the case where receiving conducting triggering, the connected 3rd resistor 201 and second resistance 1012B is connected in parallel；
Wherein, the switch element 202 is triode or metal-oxide-semiconductor.
In the present embodiment, the resistance value of second resistance and type can be determined according to business need.
In the present embodiment, the quantity of resistor assembly can be determined according to business need, and be wrapped in each resistor assembly
The 3rd resistor and switch element included can be selected according to business need.The type and resistance value of 3rd resistor 201
It can be determined according to business need.Switch element 202 can be triode or metal-oxide-semiconductor, wherein metal-oxide-semiconductor can be wanted according to business
It asks and selects PMOS tube or NMOS tube.
In the present embodiment, when switch element 202 is triode, as shown in Figure 5:
It include that there are three resistor assembly 1012C, and switch element 202 is triode in Fig. 5.From figure 5 it can be seen that every
One resistor assembly includes:
3rd resistor 201, the first end F1 of 3rd resistor 201 respectively with the first end E1 and temperature of second resistance 1012B
The 4th pin A4 for spending monitor 1011 is connected, and the first of the second end F2 of 3rd resistor 201 and switch element 202 (triode)
(collector c) is connected at end.
Switch element 202 (triode), first end (collector c) and the 3rd resistor 201 of switch element 202 (triode)
Second end F2 be connected, the second end (emitter e) of switch element 202 (triode) is connected with ground wire GND.And switch element
The base stage b of 202 (triodes) is when receiving conducting triggering, switch element 202 (triode) conducting, and connected third is electric
Resistance 201 is connected in parallel with second resistance 1012B.
It in the present embodiment, can be according to set temperature, at least one target resistance component in each resistor assembly
Carry out conducting triggering so that receive conducting triggering resistor assembly in 3rd resistor 201 it is in parallel with second resistance 1012B after
Total resistance value and set temperature meet formula (1).For example: the switch element 202 (triode) in three resistor assemblies is equal
Be conducting to ground wire the conducting resistance very little of triode (negligible), at this time second resistance 1012B respectively with three third electricity
The 4th pin A4 that resistance 201 is coupled in parallel to temperature controller, thus according to after being connected in parallel second resistance 1012B and three
Total resistance value of 3rd resistor 201 carrys out default settings temperature.It, can be by three switch members when needing to be adjusted set temperature
At least one switch element cut-off in part 202 (triode), to complete the adjustment of set temperature.
In the present embodiment, when switch element 202 is NMOS tube, as shown in Figure 6:
It include that there are three resistor assemblies, and switch element 202 is NMOS tube in Fig. 6.From fig. 6 it can be seen that each
Resistor assembly includes:
3rd resistor 201, the first end F1 of 3rd resistor 201 respectively with the first end E1 and temperature of second resistance 1012B
The 4th pin A4 for spending monitor 1011 is connected, and the first of the second end F2 of 3rd resistor 201 and switch element 202 (NMOS tube)
(drain electrode d) is connected at end.
Switch element 202 (NMOS tube), first end (drain electrode d) and the 3rd resistor 201 of switch element 202 (NMOS tube)
Second end F2 is connected, and (source electrode s's second end of switch element 202 (NMOS tube)) is connected with ground wire GND.And switch element 202
The grid g of (NMOS tube) is when receiving conducting triggering, switch element 202 (NMOS tube) conducting, and the 3rd resistor being connected
201 are connected in parallel with second resistance 1012A.
It in the present embodiment, can be according to preset set temperature, at least one target electricity in each resistor assembly
Resistance component carries out conducting triggering, so as to receive the 3rd resistor 201 and second resistance 1012B in the resistor assembly of conducting triggering
Total resistance value and set temperature after parallel connection meet formula (1).For example: a switch element 202 in three resistor assemblies
(NMOS tube) is conducting to ground wire the conducting resistance very little of NMOS tube (negligible), and second resistance 1012A and one the at this time
4th pin A4 of the cut-in temperature controller in parallel of three resistance 201, thus according to the second resistance 1012B and one after being connected in parallel
Total resistance value of a 3rd resistor 201 carrys out default settings temperature.When needing to be adjusted set temperature, three can be switched
The cut-off of at least one switch element or conducting in element 202 (NMOS tube), to complete the adjustment of set temperature.
Using the circuit structure of the temperature setting sub-circuit 1012 of the present embodiment, it may be implemented 2nKind set temperature, wherein
N is the quantity of resistor assembly.
According to above-described embodiment, using the on or off of switch element by least one 3rd resistor and second resistance simultaneously
Connection connection can complete the adjustment to set temperature by adjusting the quantity of the 3rd resistor in parallel with second resistance.Therefore,
Service application is more flexible.
In an embodiment of the invention, according to the difference for the element for carrying out conducting triggering, supply convertor at least exists
The following two kinds structure:
The first,
In an embodiment of the invention, as shown in fig. 7, in temperature setting sub-circuit 1012 further include: at least one
The quantity of a independent switch 1012D, the independent switch 1012D are identical as the quantity of the resistor assembly；
Each described independent switch 1012D, is connected with the switch element 202 in a resistor assembly respectively, is used for
Conducting triggering is carried out to the connected switch element 202 under external conducting triggering.
In the present embodiment, the concrete type of independent switch 1012D can be determined according to business need.Each is independently opened
Conducting triggering can be carried out to connected switch element under external conducting triggering by closing, so that connected 3rd resistor and the second electricity
Resistance is formed and is connected in parallel.Each independent switch can carry out cut-off touching to connected switch element under external cut-off triggering
Hair, so that connected 3rd resistor and second resistance does not form connection relationship.
In the present embodiment, when switch element is triode, independent switch is connected with the base stage of triode.Such as Fig. 7 institute
Show, independent switch 1012D is connected with the base stage b of triode.
In the present embodiment, when switch element is NMOS tube, independent switch is connected with the grid of NMOS tube, here will not
It is illustrated with schematic diagram.
Second,
In an embodiment of the invention, as shown in figure 8, in temperature setting sub-circuit 1012 further include: control core
Piece 1012E；
In the control chip 1012E include multiple pins, wherein each described pin respectively with the resistance
Switch element 202 in component is connected；
The control chip 1012E, for including at least one described resistor assembly under external conducting triggering
At least one target switch element 202 carry out conducting triggering.
In the present embodiment, the type for controlling chip can be determined according to business need.It should be noted that control chip
In pin quantity should be than or equal to switch element quantity, with guarantee each switch element respectively with a resistance group
Part is connected.
In the present embodiment, the control received external trigger of chip can be a triggering command, can in the triggering command
To include at least one switch element mark, at least one switch element is then identified into corresponding switch element and is determined as target
Switch element.Conducting triggering is carried out to each target switch element, so that each target switch element conductive, so that with each mesh
The connected 3rd resistor of mark switch element is connected in parallel with second resistance formation.
In the present embodiment, control chip is in the case where receiving external cut-off triggering, to corresponding at least with cut-off triggering
One target switch element carries out cut-off triggering, so that each object component ends.It is and each in the cut-off of each object component
Connection relationship is not present in the connected 3rd resistor of target switch element and second resistance.
Switch element is carried out using the control chip or independent switch being connected with switch element according to above-described embodiment
On or off triggering.It can use control chip when business has demand or independent switch be connected or cut to switch element
It only triggers, forms the 3rd resistor being connected in parallel with second resistance to change, therefore service application is more flexible.
In an embodiment of the invention, as shown in figure 9, the voltage transmission circuit 102, respectively with the enable pin
1031 and the supply convertor ontology 103 voltage input pin 1032 be connected, for what first power supply was provided
Supply voltage is transferred to the supply convertor ontology by the enable pin 1031 and the voltage input pin 1032
103。
In an embodiment of the invention, the supply convertor ontology 103 is also used to connect in the enable pin 1031
When the supply voltage received is less than preset voltage threshold, stop the power supply using the voltage transmission circuit 102 transmission
Voltage is the load supplying；
In the present embodiment, supply convertor ontology receives the power supply electricity that voltage transmission circuit transmission is come in enable pin
When pressure is less than preset voltage threshold, illustrate supply voltage exception, if being further continued for using the supply voltage being that load supplying can
Supply convertor ontology be able to can be caused to damage, therefore, need to stop the supply voltage using voltage transmission circuit transmission at this time
For load supplying.
In the present embodiment, supply convertor ontology receives the power supply electricity that voltage transmission circuit transmission is come in enable pin
When pressure is not less than preset voltage threshold, illustrates that supply voltage is normal, the power supply of voltage transmission circuit transmission can be continued with
Voltage is load supplying.
In the present embodiment, voltage threshold can be determined according to business need.For example, can be 3V.
According to above-described embodiment, supply convertor ontology receives supply voltage less than preset voltage threshold in enable pin
When value, stop being load supplying using the supply voltage of voltage transmission circuit transmission.Therefore it reduces supply convertor and utilizes low electricity
The flat probability that load is powered.
In an embodiment of the invention, as shown in Figure 10, the voltage transmission circuit 102 may include: the two or two pole
Pipe 1021；
Second diode 1021 anode respectively with 1032 phase of first power supply and the voltage input pin
Even；The cathode of second diode is connected with the enable pin 1031.
In the present embodiment, the type of the second diode 1021 can be determined according to specific business demand.Optionally,
Two diodes 1021 can be germanium diode or silicon diode.
In the present embodiment, no matter enable pin 1031 from the first power supply to supply convertor 103 and voltage input pipe
When 1032 input low level of foot or high level, the second diode 1021 is both turned on, so that the supply voltage of the first power delivery
Supply convertor ontology 103 can be transferred to.
It include a diode according to above-described embodiment, in voltage transmission circuit, therefore in supply convertor ontology
Electric current cannot back flow into the first power supply, so that reducing the first power supply the probability damaged occurs.
In an embodiment of the invention, as shown in figure 11, the voltage transmission circuit 102 can also include: self- recoverage
Insure resistance 1022；
The first end of the self- recoverage insurance resistance 1022 is connected with first power supply；The self- recoverage insures resistance
1022 second end is connected with the voltage input pin 1032 and the enable pin 1031 respectively.
In the present embodiment, the pattern of self- recoverage insurance resistance 1022 can be determined according to business need.
In the present embodiment, short trouble occurs in the first abnormity of power supply, load or exception occurs in supply convertor ontology
When causing the electric current in voltage transmission circuit much, the temperature on self- recoverage insurance resistance 1022 can be increased sharply, and self- recoverage is protected
The impedance of dangerous resistance 1022 can be mutated to very big, thus block the first power supply continue as supply convertor ontology or load supplies
Electricity.After failure is excluded, the impedance of self- recoverage insurance resistance 1022 is reduced to 0, voltage transmission circuit 102 can continue as by
The supply voltage that first power supply provides is transferred to supply convertor ontology.
According to above-described embodiment, self- recoverage insurance resistance is provided in voltage transmission circuit, in the first abnormity of power supply, load
When exception, which occur, in generation short trouble or power conversion ontology causes the electric current in voltage transmission circuit much, confession can be blocked
Electricity, therefore effective protection is carried out to supply convertor.
It in an embodiment of the invention, further include informing pin in the supply convertor ontology 103；
It is described to inform that pin is connected with external annunciator；
The supply convertor ontology 103, for passing through when stopping using the supply voltage is the load supplying
Inform that pin sends abnormal electrical power supply signal to the annunciator.
In the present embodiment, inform that pin can be POWER GOOD pin.
In the present embodiment, abnormal electrical power supply signal can be set according to business need, so that annunciator can root
Abnormity prompt is carried out according to the abnormal electrical power supply signal.Optionally, set supply convertor ontology 103 normally using supply voltage as
When load supplying, informing that pin can prompt state is 1.Power source change device ontology 103 is stopping using supply voltage being load
When power supply, by informing that pin sends abnormal electrical power supply signal to annunciator, which can be 0.
In the present embodiment, it when annunciator receives abnormal electrical power supply signal, can be carried out according to abnormal electrical power supply signal
It informs, so that it is load supplying that user recognizes that supply convertor ontology stops according to informing in time.
In the present embodiment, the pattern of annunciator can be determined according to business need.For example, can be display screen.
According to above-described embodiment, power source change device ontology passes through itself when stopping using supply voltage is load supplying
Informing pin to annunciator send abnormal electrical power supply signal.Annunciator informed according to abnormal electrical power supply signal, so as to
Family can carry out corresponding emergency processing according to informing in time.
In an embodiment of the invention, the specific pattern of load can be determined according to business need.Optionally, load
The difference of specific pattern and supply convertor place system and change, load for supply convertor electricity consumption in systems set
It is standby.
In an embodiment of the invention, the pattern of the first power supply can be determined according to business need.For example can be
220V AC power source.
Below with supply convertor shown in Figure 12, supply convertor is illustrated, which includes:
First power supply 301, load 302, supply convertor 303 and annunciator 304.
It wherein, include temperature monitoring circuit 101, voltage transmission circuit 102 and supply convertor in supply convertor 303
Ontology 103.
First power supply 301 is connected with voltage transmission circuit 102；Load 302 is connected with supply convertor ontology 103；It informs
Equipment 304 is connected with supply convertor ontology 103.
Temperature monitoring circuit 101 is connected with the enable pin 1031 of supply convertor ontology 103, temperature monitoring circuit 101
In include temperature monitor 1011, temperature setting sub-circuit 1012 and first diode 1014.Temperature sets sub-circuit
1012 include second resistance 1012B and three resistor assemblies, wherein respectively includes 3rd resistor in each resistor assembly
201 and switch element 202 (triode), and each switch element 202 is connected with an independent switch 1012D respectively.
It include the second diode 1021 and self- recoverage insurance resistance 1022 in voltage transmission circuit 102, and voltage passes
Transmission of electricity road 102 is connected with the enable pin 1031 of supply convertor ontology 103 and voltage input pin 1032 respectively.
An independent switch 1012D in temperature monitoring circuit 101 is under external conducting triggering to connected switch member
Part 202 (triode) carries out conducting triggering, so that connected switch element 202 (triode) conducting, and make the switch element 202
(triode) connected 3rd resistor 201 is connected in parallel with second resistance 1012B.The 3rd resistor 201 and second resistance
Total resistance value after 1012B is in parallel is just the all-in resistance of temperature setting sub-circuit 1012, which defines set temperature.
The supply voltage that first power supply 301 provides is transferred to supply convertor ontology 103 by voltage transmission circuit 102.
Temperature monitoring circuit 101 is when monitoring environment temperature greater than set temperature, to 1031 input low level of enable pin.
Supply convertor ontology 103 stops when enable pin 1031 receives the low level of the input of temperature monitoring circuit 101
It is only 302 power supply of load using the supply voltage that voltage transmission circuit 102 transmits.And stopping using supply voltage being load
When 302 power supply, abnormal electrical power supply signal is sent to annunciator 304 by the informing pin of itself, so that annunciator 304 utilizes
Abnormal electrical power supply signal is informed, recognizes the case where not powering for load 302 in time with user.
The each embodiment of the present invention at least has the following beneficial effects:
1, in embodiments of the present invention, which includes temperature monitoring circuit, voltage transmission circuit and power supply
Converter ontology.Wherein, temperature monitoring circuit is connected with the enable pin of supply convertor ontology, and temperature monitoring circuit is being supervised
When controlling environment temperature greater than preset set temperature, to the enable pin input low level of power source change device.Voltage transmission electricity
The supply voltage that road provides external power supply is transferred to supply convertor ontology.Supply convertor ontology is received in enable pin
When the low level of temperature monitoring circuit input, illustrate that environment temperature then stops the power supply electricity using voltage transmission circuit transmission extremely
Pressure is load supplying.By above-mentioned it is found that temperature monitoring circuit is monitoring environment temperature in scheme provided in an embodiment of the present invention
When degree is greater than the abnormal conditions of set temperature, to the enable pin input low level of supply convertor ontology, so that power conversion
The low level that device ontology is received according to enable pin stops powering for external loading in time, so that supply convertor is in ring
It stops working in time when the temperature anomaly of border.Therefore, scheme provided in an embodiment of the present invention can reduce supply convertor and damage
Bad probability.
2, in embodiments of the present invention, set temperature is determining by the all-in resistance of temperature setting sub-circuit, that is,
The set temperature for meeting business demand can be set out in advance by being adjusted to the all-in resistance of temperature setting sub-circuit.Therefore, it utilizes
The all-in resistance of temperature setting sub-circuit more convenient, accurately can set set temperature.
It 3, in embodiments of the present invention, include a diode in temperature monitoring circuit, therefore supply convertor ontology
In electric current cannot back flow into temperature monitor, so that reducing temperature monitor there is the probability damaged.
4, in embodiments of the present invention, due to including comprising only a resistance, circuit in temperature setting sub-circuit
Structure is more succinct.
5, in embodiments of the present invention, using the on or off of switch element that at least one 3rd resistor is electric with second
Resistance is connected in parallel, and can complete the adjustment to set temperature by adjusting the quantity of the 3rd resistor in parallel with second resistance.
Therefore, service application is more flexible.
6, in embodiments of the present invention, using the control chip or independent switch being connected with switch element, to switch element
Carry out on or off triggering.It can use control chip when business has demand or switch element be connected in independent switch
Or cut-off triggering, the 3rd resistor being connected in parallel is formed with second resistance to change, therefore service application is more flexible.
7, in embodiments of the present invention, supply convertor ontology receives supply voltage less than preset electricity in enable pin
When pressing threshold value, stop being load supplying using the supply voltage of voltage transmission circuit transmission.Therefore supply convertor is reduced to utilize
The probability that low level is powered load.
It 8, in embodiments of the present invention, include a diode in voltage transmission circuit, therefore supply convertor ontology
In electric current cannot back flow into the first power supply, so that reducing the first power supply there is the probability damaged.
9, in embodiments of the present invention, be provided in voltage transmission circuit self- recoverage insurance resistance, the first abnormity of power supply,
When exception, which occur, in load generation short trouble or power conversion ontology causes the electric current in voltage transmission circuit much, it can block
Power supply, therefore effective protection is carried out to supply convertor.
10, in embodiments of the present invention, power source change device ontology passes through when stopping using supply voltage is load supplying
The informing pin of itself sends abnormal electrical power supply signal to annunciator.Annunciator informed according to abnormal electrical power supply signal, with
Just user can carry out corresponding emergency processing according to informing in time.
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is existed without necessarily requiring or implying between these entities or operation
Any actual relationship or order.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment for including a series of elements not only includes those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including
There is also other identical factors in the process, method, article or equipment of the element.
Finally, it should be noted that the foregoing is merely presently preferred embodiments of the present invention, it is merely to illustrate skill of the invention
Art scheme, is not intended to limit the scope of the present invention.Any modification for being made all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., are included within the scope of protection of the present invention.
Claims (10)
1. a kind of supply convertor characterized by comprising
Temperature monitoring circuit, voltage transmission circuit and supply convertor ontology；
The voltage transmission circuit, the supply voltage for providing the first external power supply are transferred to the supply convertor sheet
Body；
The temperature monitoring circuit is connected, for whether monitoring environment temperature with the enable pin of the supply convertor ontology
Greater than preset set temperature, if so, to the enable pin input low level；
The supply convertor ontology, for receiving the low level of the temperature monitoring circuit input in the enable pin
When, stop being external load supplying using the supply voltage of the voltage transmission circuit transmission.
2. supply convertor according to claim 1, which is characterized in that
The temperature monitoring circuit, comprising: temperature monitor and temperature set sub-circuit；
First pin of the temperature monitor is connected with the enable pin, and the second pin is connected with second source, third pipe
Foot is connected with ground wire, and the 4th pin is connected with the first end of temperature setting sub-circuit；
The first end of the temperature setting sub-circuit is connected with the 4th pin of the temperature monitor, second end and the ground wire
It is connected.
3. supply convertor according to claim 2, which is characterized in that
Relationship between the all-in resistance and the set temperature of the temperature setting sub-circuit meets the first formula；
First formula includes:
R=a × T2-b×T+c
Wherein, the R characterizes all-in resistance, the unit of the temperature setting sub-circuit: kilo-ohm；The T characterizes the set temperature,
Unit: degree Celsius；The a characterizes the first coefficient；The b characterizes the second coefficient；The c characterizes correction constant；
And/or
The temperature monitoring circuit, further includes: first diode；
The anode of the first diode is connected with the first pin of the temperature monitor；The cathode of the first diode with
The enable pin is connected.
4. supply convertor according to claim 2 or 3, which is characterized in that
It include: first resistor in the temperature setting sub-circuit；
The first end of the first resistor is connected with the 4th pin of the temperature monitor, and second end is connected with the ground wire.
5. supply convertor according to claim 2 or 3, which is characterized in that
It include: second resistance and at least one resistor assembly in the temperature setting sub-circuit, wherein each described resistance
3rd resistor and switch element are respectively included in component；
In each described resistor assembly:
The first end of the 3rd resistor distinguishes the first end of the second resistance and the 4th pin of the temperature monitor
It is connected；Second end is connected with the first end of the switch element；
The first end of the switch element is connected with the second end of the 3rd resistor, and second end is connected with ground wire, for connecing
The lower conducting of conducting triggering is received, connected 3rd resistor is connected in parallel with the second resistance；Wherein, the switch element is
Triode or metal-oxide-semiconductor.
6. supply convertor according to claim 5, which is characterized in that
In the temperature setting sub-circuit further include: at least one independent switch, the quantity of the independent switch and the resistance
The quantity of component is identical；
Each described independent switch is connected with the switch element in a resistor assembly respectively, for touching in external conducting
It gives to the connected switch element and carries out conducting triggering.
7. supply convertor according to claim 5, which is characterized in that
In the temperature setting sub-circuit further include: control chip；
It include multiple pins in the control chip, wherein each described pin is respectively and in a resistor assembly
Switch element is connected；
The control chip, at least one for including at least one described resistor assembly under external conducting triggering
A target switch element carries out conducting triggering.
8. supply convertor according to claim 1 to 3, which is characterized in that
The voltage transmission circuit, respectively with the voltage input pin phase of the enable pin and the supply convertor ontology
Even, the supply voltage for providing first power supply is transferred to by the enable pin and the voltage input pin
The supply convertor ontology.
9. supply convertor according to claim 8, which is characterized in that
The supply convertor ontology, the supply voltage for being also used to receive in the enable pin are less than preset voltage
When threshold value, stop being the load supplying using the supply voltage of the voltage transmission circuit transmission；
And/or
The voltage transmission circuit, comprising: the second diode；
The anode of second diode is connected with first power supply and the voltage input pin respectively；Described 2nd 2
The cathode of pole pipe is connected with the enable pin；
And/or
The voltage transmission circuit, comprising: self- recoverage insures resistance；
The first end of the self- recoverage insurance resistance is connected with first power supply；The second end point of the self- recoverage insurance resistance
It is not connected with the voltage input pin and the enable pin.
10. supply convertor according to claim 1 to 3, which is characterized in that
It further include informing pin in the supply convertor ontology；
It is described to inform that pin is connected with external annunciator；
The supply convertor ontology, for passing through the announcement when stopping using the supply voltage is the load supplying
Know that pin sends abnormal electrical power supply signal to the annunciator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810985135.6A CN109245051A (en) | 2018-08-28 | 2018-08-28 | A kind of supply convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810985135.6A CN109245051A (en) | 2018-08-28 | 2018-08-28 | A kind of supply convertor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109245051A true CN109245051A (en) | 2019-01-18 |
Family
ID=65069437
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810985135.6A Pending CN109245051A (en) | 2018-08-28 | 2018-08-28 | A kind of supply convertor |
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| CN (1) | CN109245051A (en) |
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| CN205882679U (en) * | 2016-01-08 | 2017-01-11 | 中兴通讯股份有限公司 | Protective circuit |
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