CN110209233A - Power module - Google Patents
Power module Download PDFInfo
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- CN110209233A CN110209233A CN201910477371.1A CN201910477371A CN110209233A CN 110209233 A CN110209233 A CN 110209233A CN 201910477371 A CN201910477371 A CN 201910477371A CN 110209233 A CN110209233 A CN 110209233A
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- 239000003990 capacitor Substances 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 20
- 239000003381 stabilizer Substances 0.000 claims description 16
- 230000006837 decompression Effects 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 resistance R193 Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
This application involves a kind of power modules, including pressure unit, voltage to compare switch unit, the first partial pressure unit, the second partial pressure unit and output unit, and it includes first input end, the second input terminal and output end that voltage, which compares switch unit,；Pressure unit connects external power supply, and the first input end that voltage compares switch unit is connected by the first partial pressure unit, the second input terminal that voltage compares switch unit connects external power supply by the second partial pressure unit, voltage compares the output end connection output unit of switch unit, and output unit is powered device for connecting；Voltage compares switch unit and is connected when the voltage of the second input terminal is greater than the voltage of first input end, output unit output voltage is made to compare switch unit to device, voltage is powered and turn off when the voltage of the second input terminal is less than the voltage of first input end, make output unit without output.Power module provided by the present application can reduce power consumption.
Description
Technical field
This application involves power electronics fields, more particularly to a kind of power module.
Background technique
Power module is exported after can handling the voltage of access to device is powered, for carrying out to be powered device
Power supply.For example, in battery management system, power module accesses the direct current of battery output, direct current be depressured etc.
Other operational modules of output into power-supply management system are powered after reason.
Traditional power module is usually that will export after the direct pressure regulation of the voltage of access to device is powered, so that defeated
Voltage out meets the needs of being powered device.However, the power supply due to battery management system is directly derived from battery, as long as battery
Management system is in running order just to have quiescent dissipation, when battery is consumed by the quiescent dissipation of battery management system for a long time
When will exist battery by consumption it is dead and the case where can not restore, when especially battery has been in low battery, such case is more aobvious
It writes.
Summary of the invention
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of power module that can reduce power consumption.
A kind of power module, including pressure unit, voltage compare switch unit, the first partial pressure unit, the second partial pressure unit
And output unit, it includes first input end, the second input terminal and output end that the voltage, which compares switch unit,；The pressure unit
External power supply is connected, and the first input end that the voltage compares switch unit is connected by first partial pressure unit, it is described
The second input terminal that voltage compares switch unit connects the external power supply by second partial pressure unit, and the voltage compares
The output end of switch unit connects the output unit, and the output unit is powered device for connecting；
The voltage compares switch unit when the voltage of second input terminal is greater than the voltage of the first input end
It is connected, the output unit output voltage is made to be powered device to described, it is defeated described second that the voltage compares switch unit
Enter end voltage be less than the first input end voltage when shutdown, make the output unit without output.
Above-mentioned power module, pressure unit access the voltage of external power supply output, and carry out at decompression to the voltage of access
The first input end that compares switch unit, and the voltage of external power supply output are exported to voltage by the first partial pressure unit after reason
Second input terminal that compares switch unit is exported by the second partial pressure unit to voltage；Voltage compares switch unit in the second input
The voltage at end is connected when being greater than the voltage of first input end, opens output unit output voltage relatively to device, voltage is powered
It closes unit to turn off when the voltage of the second input terminal is less than the voltage of first input end, makes output unit not output voltage, thus
It is powered device unpowered.In this way, normal power supply when the voltage that may be implemented in external power supply is higher, external power supply voltage it is inclined
Power supply is disconnected when low, is avoided continued power under low-voltage state and is consumed electricity, so as to reduce power consumption, avoids external electricity
Source electricity is dead by consumption.
Detailed description of the invention
Fig. 1 is the structural block diagram of power module in an embodiment；
Fig. 2 is the circuit diagram of pressure unit in an embodiment；
Fig. 3 is the circuit theory that voltage compares switch unit, the first partial pressure unit and the second partial pressure unit in an embodiment
Figure；
Fig. 4 is the circuit diagram of output unit in an embodiment；
Fig. 5 is the structural block diagram that power module connects battery in an embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
This application provides a kind of power modules, and with reference to Fig. 1, in one embodiment, power module 10 includes that decompression is single
First 11, first partial pressure unit 12, the second partial pressure unit 13, voltage compare switch unit 14 and output unit 15.Voltage is relatively opened
Closing unit 14 includes first input end, the second input terminal and output end；Pressure unit 11 connects external power supply 20, and passes through first
Partial pressure unit 12 connects the first input end that voltage compares switch unit 14, and the second input terminal that voltage compares switch unit 14 is logical
The second partial pressure unit 13 connection external power supply 20 is crossed, voltage compares the output end connection output unit 15 of switch unit 14, output
Unit 15 is powered device 30 for connecting.
Voltage compares switch unit 14 and is connected when the voltage of the second input terminal is greater than the voltage of first input end, makes to export
15 output voltage of unit compares switch unit 14 and inputs in the voltage of the second input terminal less than first to device 30, voltage is powered
It turned off when the voltage at end, make output unit 15 without output.
Wherein, external power supply 20 is DC power supply, such as battery；Specifically, pressure unit 11 is connecting DC power supply just
Pole and cathode, the second partial pressure unit 13 connect the anode and cathode of DC power supply.Wherein, pressure unit 11 accesses external power supply 20
The voltage of output, and the voltage of access is carried out after decompression processing comparing switch by the first partial pressure unit 12 output to voltage single
The first input end of member 14；That is, voltage compare the first input end of switch unit 14 voltage be equal to pressure unit 11 be depressured it is defeated
Voltage out divides resulting voltage by the first partial pressure unit 12.Voltage compares the voltage of the second input terminal of switch unit 14
Resulting voltage is divided by the second partial pressure unit 13 equal to the voltage that external power supply 20 exports.
Voltage compares the voltage that switch unit 14 compares first input end and the second input terminal, if voltage compares switch unit
The voltage of 14 the second input terminal is greater than the voltage that voltage compares the first input end of switch unit 14, indicates that external power supply 20 is defeated
Voltage out is relatively high, at this point, voltage compares the conducting of switch unit 14, it can be with output voltage to output unit 15, to export
15 output voltage of unit is to being powered device 30；If the voltage that voltage compares the second input terminal of switch unit 14 is less than voltage ratio
Compared with the voltage of the first input end of switch unit 14, the low voltage that external power supply 20 exports is indicated, at this point, voltage compares switch
Unit 14 turns off, and voltage compares without output between switch unit 14 and output unit 15, so that output unit 15 stops without output
To the power supply of power supply device 30.
Above-mentioned power module 10, pressure unit 11 accesses the voltage that external power supply 20 exports, and carries out to the voltage of access
The first input end that compares switch unit 14, and external power supply are exported to voltage by the first partial pressure unit 12 after decompression processing
The voltage of 20 outputs compares the second input terminal of switch unit 14 by the output of the second partial pressure unit 13 to voltage；Voltage is relatively opened
It closes unit 14 to be connected when the voltage of the second input terminal is greater than the voltage of first input end, makes 15 output voltage of output unit to quilt
Power supply device 30, voltage compare the shutdown when the voltage of the second input terminal is less than the voltage of first input end of switch unit 14, make
The not output voltage of output unit 15, to be powered 30 unpowered of device.In this way, the voltage that may be implemented in external power supply 20 is higher
When normal power supply, in the low voltage of external power supply 20 disconnect power supply, avoid continued power under low-voltage state and consume electricity
Amount avoids external power supply electricity dead by consumption so as to reduce power consumption.
In one embodiment, pressure unit 11 includes partial pressure voltage regulator circuit and linear voltage regulator, and partial pressure voltage regulator circuit connects
External power supply 20 and linear voltage regulator are connect, linear voltage regulator connects voltage by the first partial pressure unit 12 and compares switch unit 14
First input end.
Wherein, partial pressure voltage regulator circuit accesses the voltage of the output of external power supply 20, carries out partial pressure and pressure stabilizing to the voltage of access
After export to linear voltage regulator；After linear voltage regulator carries out decompression conversion to the voltage of input, the voltage of output passes through first point
Pressure unit 12 exports the first input end for comparing switch unit 14 to voltage.It is using partial pressure voltage regulator circuit and linearly steady by combining
Depressor carries out lowering and stabilizing blood pressure processing, the voltage stabilization of output, not with input voltage variation to the voltage that external power supply 20 exports
Variation.
In one embodiment, referring to FIG. 2, partial pressure voltage regulator circuit 111 include first resistor R18, second resistance R58,
3rd resistor R59, the 4th resistance R64, first switch tube Q7, second switch Q12, the first voltage-stabiliser tube D16, the second voltage-stabiliser tube
D15 and filter capacitor C33.
First resistor R18 and second resistance R58 series connection, and the input terminal and second of common end connection first switch tube Q7 is opened
The input terminal for closing pipe Q12, the first electrode of first resistor R18 other end connection external power supply 20, the second electricity after series connection after series connection
Hinder the control terminal of R58 other end connection first switch tube Q7 and the cathode of the first voltage-stabiliser tube D16；The anode of first voltage-stabiliser tube D16
Connect the second electrode of external power supply 20.Wherein, the current potential of the first electrode of external power supply 20 is higher than the second of external power supply 20
Electrode.By connection first electrode and second electrode, can be formed into a loop.For example, by taking external power supply 20 is battery as an example, the first electricity
The extremely anode of battery, first resistor R18 connect the anode of battery by the end B+ in Fig. 2, and second electrode is the cathode of battery,
That is the cathode of the connection of ground terminal shown in Fig. 2 battery.
The control terminal of the output end connection second switch Q12 of first switch tube Q7,3rd resistor R59 and the 4th resistance
R64 series connection, and common end connects cathode and one end filter capacitor C33 of the second voltage-stabiliser tube D15,3rd resistor R59 is another after series connection
One end connects the output end of second switch Q12, and the 4th resistance R64 other end connects linear voltage regulator 112 after series connection；Second is steady
The anode of pressure pipe D15 connects the second electrode of external power supply 20 with the other end of filter capacitor C33.
By using first resistor R18, second resistance R58,3rd resistor R59, the 4th resistance R64, first switch tube Q7,
Second switch Q12, the first voltage-stabiliser tube D16, the second voltage-stabiliser tube D15 and filter capacitor C33, the voltage warp that external power supply 20 exports
By first resistor R18 and second resistance R58 partial pressure, the first voltage-stabiliser tube D16 pressure stabilizing, via first switch tube Q7, second switch
Q12,3rd resistor R59 and the 4th resistance R64 are exported to linear voltage regulator 112, and carry out pressure stabilizing, filter by the second voltage-stabiliser tube D15
Wave capacitor C33 is filtered, so that the voltage of output to linear voltage regulator 112 passes through partial pressure and steady pressure treatment, high treating effect.
Specifically, first switch tube Q7 and second switch Q12 is triode.It is appreciated that in other embodiments, the
One switching tube Q7 and second switch Q12 can also be other kinds of switching device, such as MOS (Metal-Oxide-
Semiconductor Metal-oxide-semicondutor) pipe.
In one embodiment, with continued reference to FIG. 2, linear voltage regulator 112 may include linear regulator chip U18, it is outer
Enclose voltage-stabiliser tube D18 and the 4th resistance R64 of periphery capacitor C24, linear regulator chip U18 connection, external power supply 20 second electrode,
And first partial pressure unit 12, peripheral voltage-stabiliser tube D18 are connected to linear regulator chip U18 with periphery equal one end capacitor C24 and connect
The common end of first partial pressure unit 12, the other end connect the second electrode of external power supply 20.It specifically, is electricity with external power supply 20
For pond, the second electrode of external power supply 20 is the cathode of battery；As shown in Fig. 2, linear regulator chip U18 is connected by the end PWR1
Connect the first partial pressure unit 12.
By using linear regulator chip U18, reduced output voltage is carried out to the voltage of input, in combination with using peripheral pressure stabilizing
Pipe D18 and periphery capacitor C24 are handled, and the stability of the voltage exported to the first partial pressure unit 12 can be reinforced.Specifically,
Linear regulator chip U18 can be the chip that the voltage of 12V (volt) is converted to 3.3V voltage output.
In one embodiment, with reference to Fig. 3, it includes voltage comparator U15 and switching circuit that voltage, which compares switch unit 14,；
The first input end of voltage comparator U15 compares the first input end of switch unit 14 as voltage, for connecting the first partial pressure
Unit 12；The second input terminal of voltage comparator U15 compares the second input terminal of switch unit 14 as voltage, for connecting the
Two partial pressure units 13.The input terminal of the control terminal of the output end connection switch circuit of voltage comparator U15, switching circuit connects drop
Unit 11 and external power supply 20 are pressed, the output end of switching circuit compares the output end of switch unit 14 as voltage, for connecting
Output unit 15.
The input terminal of switching circuit uses pressure unit 11 to provide electricity for the input terminal of switching circuit for accessing voltage
Pressure, external power supply 20 give the source of ON/OFF.Specifically, voltage comparator U15 is used to compare the voltage and the of first input end input
The voltage of two input terminals input, the first electricity of output when the voltage of the second input terminal input is greater than the voltage of first input end input
Flat, switching circuit is connected in the first level, so that entire voltage compares the state that switch unit 14 is on, external power supply 20
Voltage can export to subsequent output unit 15；The voltage that voltage comparator U15 is inputted in the second input terminal is less than first
Second electrical level is exported when the voltage of input terminal input, second electrical level turns off switching circuit, so that entire voltage compares switch list
The state that member 14 is off, the voltage of external power supply 20 can not be exported to subsequent output unit 15, be powered off from realizing.Its
In, the first level and second electrical level are one of high level and low level respectively, and specifically, the first level is high level, the
Two level are low level.In this way, shutdown when the voltage that the output of external power supply 20 may be implemented is connected when higher, is lower, avoids low
Continuous drain is pressed, kwh loss is reduced.
In one embodiment, with reference to Fig. 3, the first partial pressure unit 12 includes the 5th resistance R117, the 6th resistance R122, the
One capacitor C14, the 9th resistance R125, the tenth resistance R120 and third switching tube Q10；5th resistance R117 and the 6th resistance R122
Series connection, and the first input end of common end connection voltage comparator U15, the 5th resistance R117 other end connection decompression is single after series connection
Member 11, the second electrode of the 6th resistance R122 other end connection external power supply 20, first capacitor C14 are connected in parallel on the 6th electricity after series connection
Hinder the both ends R122.As shown in figure 3, the 5th resistance R117 other end connects pressure unit 11 by the end PWR1, specifically can be logical
Cross the linear regulator chip U18 in the end PWR1 connection figure 2.Wherein, the second electrode of external power supply 20 is the two of external power supply 20
The lower electrode of current potential in a electrode.
9th one end resistance R125 connects the output end of voltage comparator U15, the other end connection the of the 9th resistance R125
The input terminal of the control terminal of three switching tube Q10, third switching tube Q10 passes through the tenth resistance R120 connection voltage comparator U15's
The output end of first input end, third switching tube Q10 connects ground terminal.Specifically, ground terminal can connect external power supply 20
Second electrode.For example, second electrode is the cathode of battery so that external power supply 20 is battery as an example, ground terminal connects the negative of battery
Pole.Specifically, third switching tube Q10 can be metal-oxide-semiconductor.It is appreciated that third switching tube Q10 may be triode.
The 6th resistance R122 is connected in parallel on by using the 5th resistance R117 and the 6th resistance R122 series connection, first capacitor C14
Both ends, and the 9th resistance R125, the tenth resistance R120 and third switching tube Q10 is used in combination, the voltage that pressure unit 11 exports
Input voltage compares the first input end of switch unit 14, structure letter after the 5th resistance R117 and the 6th resistance R122 partial pressure
It is single.
Specifically, when the output end of voltage comparator U15 exports the first level, third switching tube Q10 conducting, decompression list
11 voltages that are exported by the end PWR1 of member other than being divided by the 6th resistance R122, also pass through the tenth resistance R120 into
Row partial pressure.When the output end of voltage comparator U15 exports second electrical level, third switching tube Q10 shutdown, pressure unit 11 passes through
The voltage of the end PWR1 output is divided via the 6th resistance R122.In this way, by control the tenth resistance R120 participate in partial pressure or
It is not involved in partial pressure, may make the voltage value for being input to the first input end of voltage comparator U15 different, i.e. the electricity of the second input terminal
The comparison reference numerical value of pressure is different, to make voltage comparator U15 export the first level and voltage comparator U15 is made to export second
The voltage threshold value of level is different, that is, keeps the voltage threshold value of switching circuit turn-on and turn-off different.In this way, can prevent because of electricity
The frequent transitional states for changing by a small margin and causing switching circuit of pressure.
With continued reference to FIG. 3, the second partial pressure unit 13 includes the 7th resistance R113, the 8th resistance R116 and the second capacitor
C13；7th resistance R113 and the 8th resistance R116 series connection, and the second input terminal of common end connection voltage comparator U15, series connection
The first electrode of 7th resistance R113 other end connection external power supply 20 afterwards, the connection of the 8th resistance R116 other end is external after series connection
The second electrode of power supply 20, the second capacitor C13 are connected in parallel on the 8th both ends resistance R116.Wherein, the first electrode of external power supply 20
Current potential be higher than external power supply 20 second electrode.For example, by external power supply 20 be battery for, first electrode be battery just
Pole, the 7th resistance R113 connect the anode of battery by the end B+ in Fig. 3, and second electrode is the cathode of battery, i.e., shown in Fig. 3
The cathode of ground terminal connection battery.
The 8th resistance R116 is connected in parallel on by using the 7th resistance R113 and the 8th resistance R116 series connection, the second capacitor C13
Both ends, the voltage that external power supply 20 exports input voltage after the 7th resistance R113 and the 8th resistance R116 partial pressure compare switch
Second input terminal of unit 14, structure are simple.
In one embodiment, with continued reference to FIG. 3, switching circuit includes first switch sub-circuit 1411 and second switch
Sub-circuit 1412.Wherein, control terminal of the control terminal of first switch sub-circuit 1411 as switching circuit, for connecting voltage ratio
Compared with the output end of device U15；The input terminal of switching circuit includes the input terminal and second switch electricity of first switch sub-circuit 1411
The input terminal on road 1412, and the input terminal of first switch sub-circuit 1411 connects pressure unit 11, second switch sub-circuit 1412
Input terminal connect external power supply 20；The control of the output end connection second switch sub-circuit 1412 of first switch sub-circuit 1411
End, output end of the output end of second switch sub-circuit 1412 as switching circuit, for connecting output unit 15.Specifically,
As shown in figure 3, the input terminal of first switch sub-circuit 1411 connects pressure unit 11 by the end PWR1, connection figure specifically can be
Linear regulator chip U18 in 2；The input terminal of second switch sub-circuit 1412 connects the first electricity of external power supply 20 by the end B+
Pole, such as the anode of connection battery.By using two switch sub-circuits, the first level exported according to voltage comparator U15
The switching of turn-on and turn-off is carried out with second electrical level, to control the output of output unit 15 or not export, switch control stability
It is good.
In one embodiment, as shown in figure 3, first switch sub-circuit 1411 includes eleventh resistor R124, the 12nd
Resistance R119, thirteenth resistor R111, the 4th switching tube Q6 and the 5th switching tube Q8.Wherein, the one end eleventh resistor R124 is made
For the control terminal of first switch sub-circuit 1411, for connecting the output end of voltage comparator U15；Eleventh resistor R124 is another
The control terminal of the 4th switching tube Q6 of end connection.The input terminal of 4th switching tube Q6 is switched by twelfth resistor R119 connection the 5th
The output end of the control terminal of pipe Q8, the 4th switching tube Q6 connects ground terminal.Specifically, ground terminal can connect external power supply 20
Second electrode.For example, second electrode is the cathode of battery so that external power supply 20 is battery as an example, ground terminal connects the negative of battery
Pole.Wherein, input terminal of the input terminal of the 5th switching tube Q8 as first switch sub-circuit 1411, for connecting pressure unit
11, and common end connects the one end thirteenth resistor R111, the thirteenth resistor R111 other end connects the control of the 5th switching tube Q8
End, output end of the output end of the 5th switching tube Q8 as first switch sub-circuit 1411, for connecting second switch sub-circuit
1412 control terminal.
The circuit structure of second switch sub-circuit 1412 can be identical as the circuit structure of first switch sub-circuit 1411.?
In one embodiment, second switch sub-circuit 1412 includes the 14th resistance R112, the 15th resistance R126, the 16th resistance
R127, the 6th switching tube Q11 and the 7th switching tube Q20.Wherein, the 14th one end resistance R112 is as second switch sub-circuit
1412 control terminal specifically connects the output of the 5th switching tube Q8 for connecting the output end of first switch sub-circuit 1411
End；The 14th resistance R112 other end connects the control terminal of the 6th switching tube Q11.The input terminal of 6th switching tube Q11 passes through the
The output end of the control terminal of the 7th switching tube Q20 of 15 resistance R126 connection, the 6th switching tube Q11 connects ground terminal.Specifically,
Ground terminal can connect the second electrode of external power supply 20.The input terminal of 7th switching tube Q20 is as second switch sub-circuit
1412 input terminal for connecting external power supply 20, such as can be the anode that battery is connected by the end B+, and common end connects
16th one end resistance R127, the 16th resistance R127 other end connect the control terminal of the 7th switching tube Q20, the 7th switching tube
Output end of the output end of Q20 as second switch sub-circuit 1412, for connecting output unit 15.Specifically, such as Fig. 3 institute
Show, the output end of the 7th switching tube Q20 connects output unit 15 by OUT terminal.
Specifically, to be illustrated shown in Fig. 3, the voltage of output end (1 foot) output of voltage comparator U15 passes through the tenth
It is given to the 4th switching tube Q6 after one resistance R124, using the 5th switching tube Q8, twelfth resistor R119, thirteenth resistor
The 6th switching tube Q11 is given to after R111, the 14th resistance R112 processing.When 6th switching tube Q11 is connected, the voltage of the end B+ output
The 7th switching tube Q20 can be made open-minded by the 15th resistance R126, the 16th resistance R127 partial pressure；6th switching tube Q11 is not led
When logical, the voltage of the end B+ output cannot pass through the 15th resistance R126, the 16th resistance R127 partial pressure, can make the 7th switching tube
Q20 shutdown.
In one embodiment, output unit 15 includes reduction voltage circuit, and reduction voltage circuit connection voltage compares switch unit 14
Be powered device 30.The voltage that reduction voltage circuit compares the output of switch unit 14 to voltage is further depressured, for being powered device
Part 30 uses.
Specifically, with reference to Fig. 4, reduction voltage circuit can be DC-DC reduction voltage circuit 151, including decompression chip U14 and periphery electricity
Road, peripheral circuit include capacitor C16, capacitor C106, resistance R202, diode D31, capacitor C104, diode D14, resistance
R205, resistance R204, resistance R206, resistance R207, switching tube Q38, capacitor C103, resistance R203, diode D10, inductance L4,
Capacitor C102 and capacitor C105.By using DC-DC reduction voltage circuit 151 as shown in Figure 4, the voltage of height input can be down to low
Ripple output voltage meets the needs of being powered device 30.
In one embodiment, output unit 15 further includes voltage regulator circuit, and reduction voltage circuit is supplied by voltage regulator circuit connection
Electrical part 30.That is, the voltage of reduction voltage circuit output is exported after voltage regulator circuit pressure stabilizing to being powered device 30.In this way, can be into
One step improves the stability of power supply.Specifically, voltage regulator circuit may include LDO (Low Dropout Regulator).
Specifically, with continued reference to FIG. 4, voltage regulator circuit 152 may include voltage stabilizing chip U10 and peripheral circuit, periphery electricity
Road includes capacitor C101, capacitor C81, resistance R193, capacitor C65 and capacitor C80.The voltage of reduction voltage circuit output passes through capacitor
After C101 and capacitor C81 filtering, it is given to voltage stabilizing chip U10, the voltage exported after voltage stabilizing chip U10 processing is through capacitor C65, capacitor
After C80 filtering, accurate voltage is obtained, is exported by the end PWR3 to being powered device.
By taking above-mentioned power module 10 is applied to battery management system as an example, for example, power module 10 can connect battery, electricity
Source module 10 is used as power circuit, is the power supply of other circuit with stable precision of battery management system.As shown in figure 5, drop
The positive B+ of unit connection battery and the cathode B- of battery are pressed, and connects the inverting input terminal of voltage comparator, voltage comparator
Normal phase input end connection battery positive B+, the output end connection switch circuit of voltage comparator, switching circuit connect battery
Positive B+ and reduction voltage circuit normal phase input end, reduction voltage circuit negative-phase input connection battery cathode, reduction voltage circuit
Output connection voltage regulator circuit normal phase input end, voltage regulator circuit negative-phase input connection battery cathode, voltage regulator circuit it is defeated
Power supply for other circuit with stable precision for battery management system out.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of power module, which is characterized in that compare switch unit, the first partial pressure unit, second including pressure unit, voltage
Partial pressure unit and output unit, it includes first input end, the second input terminal and output end that the voltage, which compares switch unit,；It is described
Pressure unit connects external power supply, and connects the first input that the voltage compares switch unit by first partial pressure unit
End, the second input terminal that the voltage compares switch unit connects the external power supply by second partial pressure unit, described
The output end that voltage compares switch unit connects the output unit, and the output unit is powered device for connecting；
The voltage compare switch unit second input terminal voltage be greater than the first input end voltage when conducting,
The output unit output voltage is set to be powered device to described, the voltage compares switch unit in second input terminal
It turned off when voltage is less than the voltage of the first input end, make the output unit without output.
2. power module according to claim 1, which is characterized in that the pressure unit includes partial pressure voltage regulator circuit and line
Property voltage-stablizer, the partial pressure voltage regulator circuit connects the external power supply and the linear voltage regulator, the linear voltage regulator pass through
First partial pressure unit connects the first input end that the voltage compares switch unit.
3. power module according to claim 2, which is characterized in that the partial pressure voltage regulator circuit includes first resistor,
Two resistance, 3rd resistor, the 4th resistance, first switch tube, second switch, the first voltage-stabiliser tube, the second voltage-stabiliser tube and filtered electrical
Hold；
The first resistor and second resistance series connection, and common end connects the input terminal and described the of the first switch tube
The input terminal of two switching tubes, the first resistor other end connects the first electrode of the external power supply, institute after series connection after series connection
It states the second resistance other end and connects the control terminal of the first switch tube and the cathode of first voltage-stabiliser tube, first pressure stabilizing
The anode of pipe connects the second electrode of the external power supply；Wherein, the current potential of the first electrode of the external power supply is higher than described
The second electrode of external power supply；
The output end of the first switch tube connects the control terminal of the second switch, the 3rd resistor and the 4th electricity
Resistance series connection, and common end connect second voltage-stabiliser tube cathode and described filter capacitor one end, the 3rd resistor after series connection
The other end connects the output end of the second switch, and the 4th resistance other end connects the linear voltage regulator after series connection,
The anode of second voltage-stabiliser tube connects the second electrode of the external power supply with the other end of the filter capacitor.
4. power module according to claim 1, which is characterized in that it includes that voltage compares that the voltage, which compares switch unit,
Device and switching circuit；The first input end of the voltage comparator compares the first input end of switch unit as the voltage,
Second input terminal of the voltage comparator compares the second input terminal of switch unit, the voltage comparator as the voltage
Output end connect the control terminal of the switching circuit, the input terminal of the switching circuit connects the pressure unit and described outer
Power supply is connect, the output end of the switching circuit compares the output end of switch unit as the voltage, for connecting the output
Unit.
5. power module according to claim 4, which is characterized in that first partial pressure unit includes the 5th resistance, the
Six resistance, first capacitor, the 9th resistance, the tenth resistance and third switching tube；5th resistance and the 6th resistance series connection,
And common end connects the first input end of the voltage comparator, it is single to connect the decompression for the 5th resistance other end after series connection
Member, the 6th resistance other end connects the second electrode of the external power supply after series connection, and the first capacitor is connected in parallel on described
6th resistance both ends；
Described 9th resistance one end connects the output end of the voltage comparator, the other end connection of the 9th resistance described the
The input terminal of the control terminal of three switching tubes, the third switching tube connects the of the voltage comparator by the tenth resistance
The output end of one input terminal, the third switching tube connects ground terminal.
6. power module according to claim 5, which is characterized in that second partial pressure unit includes the 7th resistance, the
Eight resistance and the second capacitor；7th resistance and the 8th resistance series connection, and common end connects the voltage comparator
Second input terminal, the 7th resistance other end connects the first electrode of the external power supply after series connection, the described 8th after series connection
The resistance other end connects the second electrode of the external power supply, and second capacitor is connected in parallel on the 8th resistance both ends；Wherein,
The current potential of the first electrode of the external power supply is higher than the second electrode of the external power supply.
7. power module according to claim 4, which is characterized in that the switching circuit include first switch sub-circuit and
Second switch sub-circuit, control terminal of the control terminal of the first switch sub-circuit as the switching circuit, for connecting
State the output end of voltage comparator, the input terminal of the switching circuit includes the input terminal of the first switch sub-circuit and described
The input terminal of second switch sub-circuit, and the input terminal connection pressure unit of the first switch sub-circuit, described second
The input terminal for switching sub-circuit connects the external power supply, and the output end of the first switch sub-circuit connects the second switch
The control terminal of sub-circuit, output end of the output end of the second switch sub-circuit as the switching circuit, for connecting
State output unit.
8. power module according to claim 7, which is characterized in that the first switch sub-circuit includes the 11st electricity
Resistance, twelfth resistor, thirteenth resistor, the 4th switching tube and the 5th switching tube；
Control terminal of the described eleventh resistor one end as the first switch sub-circuit, for connecting the voltage comparator
Output end, the eleventh resistor other end connect the control terminal of the 4th switching tube, the input terminal of the 4th switching tube
The control terminal of the 5th switching tube is connected by the twelfth resistor, the output end of the 4th switching tube connects ground connection
End；
Input terminal of the input terminal of 5th switching tube as the first switch sub-circuit, it is single for connecting the decompression
Member, and common end connects described thirteenth resistor one end, the thirteenth resistor other end connects the control of the 5th switching tube
End processed, output end of the output end of the 5th switching tube as the first switch sub-circuit are opened for connecting described second
The control terminal of climax circuit.
9. power module according to claim 1, which is characterized in that the output unit includes reduction voltage circuit, the drop
Volt circuit connects the voltage and compares switch unit and described be powered device.
10. power module according to claim 9, which is characterized in that the output unit further includes voltage regulator circuit, described
Reduction voltage circuit is by being powered device described in voltage regulator circuit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477371.1A CN110209233A (en) | 2019-06-03 | 2019-06-03 | Power module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910477371.1A CN110209233A (en) | 2019-06-03 | 2019-06-03 | Power module |
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