CN104578748A - Passive component with temperature compensation function and electronic device using same - Google Patents
Passive component with temperature compensation function and electronic device using same Download PDFInfo
- Publication number
- CN104578748A CN104578748A CN201310484758.2A CN201310484758A CN104578748A CN 104578748 A CN104578748 A CN 104578748A CN 201310484758 A CN201310484758 A CN 201310484758A CN 104578748 A CN104578748 A CN 104578748A
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- China
- Prior art keywords
- inductor
- cpu
- temperature coefficient
- negative temperature
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1566—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with means for compensating against rapid load changes, e.g. with auxiliary current source, with dual mode control or with inductance variation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a passive component with a temperature compensation function and an electronic device using the same. The electronic device comprises a CPU (central processing unit), a filter and a power-switching circuit, wherein the filter comprises the passive component and a variable resistor; the passive component comprises an inductor and a negative temperature coefficient resistor, the negative temperature coefficient resistor is contacted with the surface of the inductor and is configured in a packaging body; the power-switching circuit supplies current information to the CPU according to the partial pressure difference of the filter and controls output voltage through the filter according to a first control signal of the CPU, so that the output voltage is provided. The electronic device further comprises an embedded controller which controls the variable resistor according to a second control signal of the CPU.
Description
Technical field
The present invention relates to a kind of passive component, particularly relate to a kind of passive component of tool temperature-compensating and use its electronic installation.
Background technology
Power-switching circuit provides the output voltage of direct current to CPU by inductor.CPU, in order to calculate the power itself consumed, needs to obtain indirectly by sensing circuit the electric current flowing through inductor.Because inductor itself exists dead resistance, so sensing circuit utilizes the pressure reduction at inductor two ends to convert the current value flow through.
In addition, when inductor is when flowing through electric current, heat can be produced and the resistance of increase dead resistance.Existing method may install negative temperature coefficient resister additional.But negative temperature coefficient resister is cannot error that precisely compensating inductance device is operationally caused.Actual output current value and be usually inconsistent via sensing the current value converted.Inaccurate owing to sensing, when carrying out overclocking (over-clocking), easily cause output voltage to exceed the maximum power supply extent of supply.
Summary of the invention
The invention provides a kind of passive component of tool temperature-compensating and use its electronic installation, to solve the problem that prior art is addressed.
The invention provides a kind of passive component of tool temperature-compensating, it comprises inductor, negative temperature coefficient resister and packaging body.The surface contact of negative temperature coefficient resister and inductor.Packaging body coats inductor and negative temperature coefficient resister.
In one embodiment of this invention, packaging body is of a size of length 7 millimeters, width 7 millimeters and height 3 millimeters.
In one embodiment of this invention, inductor comprises the first pin and the second pin.Negative temperature coefficient resister comprises the 3rd pin and the 4th pin.
The present invention also provides a kind of electronic installation, and it comprises CPU, filter and power-switching circuit.Filter couples CPU.Filter comprises passive component and variable resistor.Passive component comprises inductor and negative temperature coefficient resister, and the surface contact of negative temperature coefficient resister and inductor and being configured in packaging body.Power-switching circuit couples filter and CPU.Power-switching circuit provides current information to CPU according to the dividing potential drop pressure reduction of filter.Power-switching circuit to control output voltage by filter, provides output voltage according to the first control signal of CPU according to this.
In one embodiment of this invention, electronic installation also comprises embedded controller.Embedded controller couples CPU.Embedded controller controls variable resistor according to the second control signal of CPU.
In one embodiment of this invention, variable-resistance first end couples the output stage of power-switching circuit and the first end of inductor, and variable-resistance second end couples the first end of negative temperature coefficient resister.Filter also comprises the first resistance and the first capacitor.The first end of the first resistance couples the second end of negative temperature coefficient resister.Second end of the first resistance couples the second end of inductor.First capacitor is coupled between the first end of negative temperature coefficient resister and the second end of the first resistance.The place of coupling of the second end of inductor, the second end of the first resistance and the first capacitor provides output voltage.
In one embodiment of this invention, power-switching circuit also comprises sensing circuit, control circuit and drive circuit.Sensing circuit provides current information according to dividing potential drop pressure reduction.Control circuit received current information, output voltage and the first control signal are to provide pulse-width signal.Drive circuit couples control circuit and output stage, and drive circuit controls output stage according to pulse-width signal, converts output voltage to make input voltage.
In one embodiment of this invention, CPU is by System Management Bus connection control circuit and embedded controller.
In one embodiment of this invention, when CPU calculate the power used reach the first power threshold time, send the second control signal to reduce the dividing potential drop pressure reduction of filter.
Based on above-mentioned, tool temperature-compensating of the present invention passive component and use among its electronic installation, the packaging body of passive component is direct coated inductor and negative temperature coefficient resister.The surface of negative temperature coefficient resister contact inductor and can respond inductor temperature to change resistance.Owing to having eliminated the effect of air dielectric in packaging body, make negative temperature coefficient resister full remuneration can flow through the error that inductor causes because of electric current, therefore sensing circuit is when having sensed, and sensing result is accurate.On the other hand, when CPU calculate the power used reach the first power threshold time, CPU can send control signal to reduce the dividing potential drop pressure reduction of filter, and then can increase output voltage.
It is to be understood that above-mentioned general description and following embodiment are only exemplary and illustrative, its can not limit the present invention for advocate scope.
Accompanying drawing explanation
Accompanying drawing is below a part for specification of the present invention, it illustrates example embodiment of the present invention, and accompanying drawing is used for principle of the present invention is described together with the description of specification.
Fig. 1 is the allocation plan of the passive component of the tool temperature-compensating of one embodiment of the invention;
Fig. 2 is the circuit diagram of the electronic installation of one embodiment of the invention.
Description of reference numerals:
10: passive component;
12: inductor;
12a, 12b: pin;
14: negative temperature coefficient resister;
14a, 14b: pin;
16: packaging body;
18: variable resistor;
20: electronic installation;
110: power-switching circuit;
112: sensing circuit;
114: control circuit;
116: drive circuit;
118: output stage;
118A: switch on the bridge;
118B: bridge switch;
120: filter;
130: CPU;
140: embedded controller;
C1, C2: capacitor;
Fi: current information;
GND: earth terminal;
R1, R2: resistance;
SMB: System Management Bus;
Spwm: pulse-width signal;
T1, T2: end points;
Vcore: output voltage;
Vin: input voltage;
XU: switch on the bridge control signal;
XL: bridge switch control signal;
X1 ~ X3: control signal;
Z1: the first control signal;
Z2: the second control signal;
Δ V: dividing potential drop pressure reduction.
Embodiment
Now with detailed reference to one exemplary embodiment of the present invention, and the example of described one exemplary embodiment is described in the accompanying drawings.In addition, in drawings and the embodiments use element/component that is identical or like numerals will to be used to represent identical or similar portions.
Present inventor is through carefully studying, and prior art uses negative temperature coefficient resister but to cause to measure the pressure reduction at inductor two ends has inaccurate reason to be: non-direct contact between negative temperature coefficient resister and inductor and there is air.Air is one of medium of heat radiation.When negative temperature coefficient resister reacts the heat of inductor across air, the heat of part can scatter and disappear along with air.So negative temperature coefficient resister cannot compensate exactly because electric current flows through the error that inductor causes.
Fig. 1 is the allocation plan of the passive component of the tool temperature-compensating of one embodiment of the invention.Refer to Fig. 1.Passive component 10 comprises inductor 12, negative temperature coefficient (negative temperature coefficient, referred to as NTC) resistance 14 and packaging body 16.The coated inductor 12 of packaging body 16 and negative temperature coefficient resister 14, and the surface contact of negative temperature coefficient resister 14 and inductor 12.Thus, negative temperature coefficient resister 14 can respond the variations in temperature of inductor 12 because directly contacting inductor 12, thus negative temperature coefficient resister 14 can flow through the error that inductor 12 causes by offset current effectively.
In passive component 10, inductor 12 can comprise pin 12a and 12b; Negative temperature coefficient resister 14 can comprise pin 14a and 14b.Pin 12a is what to separate with pin 14a, and pin 12b and pin 14b are also what to separate.
It is worth mentioning that, the size of packaging body 16 can be length 7 millimeters, width 7 millimeters and height 3 millimeters, but the present invention is not as limit.Those skilled in the art can carry out according to practical application the size that design wants.
Fig. 2 is the circuit diagram of the electronic installation of one embodiment of the invention.Refer to Fig. 2.Electronic installation 20 comprises CPU (central processor unit, referred to as CPU) 130, filter 120 and power-switching circuit 110.
Power-switching circuit 110 comprises sensing circuit 112, control circuit 114, drive circuit 116 and output stage 118.Output stage 118 comprises switch on the bridge (high side switch) 118A and bridge switch (low side switch) 118B.The first end of switch on the bridge 118A receives input voltage vin.Bridge switch 118B is coupled between second end of switch on the bridge 118A and earth terminal GND.
Filter 120 couples output stage 118 and CPU 130.Filter 120 comprises passive component 10 and variable resistor 18.Passive component 10 comprises inductor 12 and negative temperature coefficient resister 14, and negative temperature coefficient resister 14 and the surface contact of inductor 12 and be configured in packaging body 16.Power-switching circuit 110 couples filter 120 and CPU 130.
Sensing circuit 112 provides current information Fi to control circuit 114 according to the dividing potential drop pressure differential deltap V of filter 120.Current information Fi is sent to CPU 130 by System Management Bus (System Management Bus) SMB by control circuit 114.CPU 130 can calculate current used power according to current information Fi and output voltage Vcore.
Electronic installation 20 also can comprise embedded controller (embedded controller, referred to as EC) 140.Embedded controller 140 couples CPU 130 and variable resistor 18.
When CPU 130 is for adjustment output voltage Vcore, the first control signal Z1 and/or the second control signal Z2 can be sent.Control circuit 114 provides pulse-width signal Spwm to drive circuit 116 according to the first control signal Z1 of CPU 130 and/or output voltage Vcore.Drive circuit 116 produces switch on the bridge control signal XU and bridge switch control signal XL according to pulse-width signal Spwm, controls switch on the bridge 118A and bridge switch 118B respectively according to this.Output stage 118 is in order to carry out the conversion of direct current to direct current to input voltage vin, thus power-switching circuit 110 provides output voltage Vcore by filter 120, and is exported to CPU 130.
CPU 130 couples embedded controller 140 by System Management Bus SMB.Embedded controller 140 can send control signal X1 ~ X3 to control the resistance of variable resistor 18 according to the second control signal Z2 from CPU 130.
In addition, filter 120 can also comprise resistance R1 and capacitor C1.The first end of variable resistor 18 couples the first end of output stage 118 and inductor 12.Second end of variable resistor 18 couples the first end of negative temperature coefficient resister 14.The first end of resistance R1 couples the second end of negative temperature coefficient resister 14.Second end of resistance R1 couples the second end of inductor 12.Capacitor C1 is coupled between the first end of negative temperature coefficient resister 14 and second end of resistance R1.The place of coupling (end points T2) of the second end of inductor 12, second end of resistance R1 and capacitor C1 provides output voltage Vcore.
In addition, filter 120 can also comprise resistance R2, and resistance R2 and capacitor C1 is connected in parallel.Electronic installation 20 can also comprise capacitor C2.Capacitor C2 is coupled between end points (output) T2 and earth terminal GND.
CPU 130 can calculate used power and whether reach the number that the first power threshold decides power consumption.
In a special applications embodiment, if when the power that CPU 130 uses has reached the first power threshold and needed to continue to use larger power, CPU 130 can control filter 120 by the second control signal Z2.Embedded controller 140 can send control signal X1 ~ X3 according to the second control signal Z2, tunes up the resistance of variable resistor 18 according to this.According to dividing potential drop theorem, because the resistance of variable resistor 18 increases, the dividing potential drop pressure differential deltap V between end points T1 and T2 will be reduced, thus the current information Fi that sensing circuit 112 senses can diminish.So control circuit 114 returns less current information Fi to CPU 130.CPU 130 sends the first control signal Z1 again and increases output voltage Vcore to make power-switching circuit 110.Thus, CPU 130 can use larger power to maintain high-performance operating state.
In sum, at the passive component of tool temperature-compensating of the present invention and in using its electronic installation, the direct coated inductor of packaging body of passive component and negative temperature coefficient resister.The surface of negative temperature coefficient resister contact inductor and can respond inductor temperature to change resistance.Owing to having eliminated the effect of air dielectric in packaging body, make negative temperature coefficient resister full remuneration can flow through the error that inductor causes because of electric current, therefore sensing circuit is when having sensed, and sensing result is accurate.On the other hand, when CPU calculate the power used reach the first power threshold time, CPU can send control signal to reduce the dividing potential drop pressure reduction of filter, and then can increase output voltage.Thus, CPU uses larger power to maintain high-performance operating state.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (11)
1. a passive component for tool temperature-compensating, is characterized in that, comprising:
One inductor;
One negative temperature coefficient resister, with the surface contact of this inductor; And
One packaging body, this inductor coated and this negative temperature coefficient resister.
2. the passive component of tool temperature-compensating according to claim 1, is characterized in that, this packaging body is of a size of length 7 millimeters, width 7 millimeters and height 3 millimeters.
3. the passive component of tool temperature-compensating according to claim 1, is characterized in that, this inductor comprises one first pin and one second pin, and this negative temperature coefficient resister comprises one the 3rd pin and one the 4th pin.
4. an electronic installation, is characterized in that, comprising:
One CPU;
One filter, couple this CPU, wherein this filter comprises a passive component and a variable resistor, and this passive component comprises an inductor and a negative temperature coefficient resister, and the surface contact of this negative temperature coefficient resister and this inductor and be configured in a packaging body; And
One power-switching circuit, couple this filter and this CPU, this power-switching circuit provides a current information to this CPU according to a dividing potential drop pressure reduction of this filter, this power-switching circuit to control an output voltage by this filter, provides this output voltage according to one first control signal of this CPU according to this.
5. electronic installation according to claim 4, is characterized in that, this electronic installation also comprises:
One embedded controller, couples this CPU and this variable resistor, and one second control signal according to this CPU controls this variable resistor.
6. electronic installation according to claim 5, it is characterized in that, this variable-resistance first end couples an output stage of this power-switching circuit and the first end of this inductor, and this variable-resistance second end couples the first end of this negative temperature coefficient resister, and this filter also comprises:
One first resistance, the first end of this first resistance couples the second end of this negative temperature coefficient resister, and the second end of this first resistance couples the second end of this inductor; And
One first capacitor, is coupled between the first end of this negative temperature coefficient resister and the second end of this first resistance, and wherein the place of coupling of the second end of this inductor, the second end of this first resistance and the first capacitor provides this output voltage.
7. electronic installation according to claim 6, is characterized in that, this power-switching circuit also comprises:
One sensing circuit, provides this current information according to this dividing potential drop pressure reduction; And
One control circuit, receives this current information, this output voltage and this first control signal to provide a pulse-width signal; And
One drive circuit, couple this control circuit and this output stage, this drive circuit controls this output stage according to this pulse-width signal, converts this output voltage to make an input voltage.
8. electronic installation according to claim 7, is characterized in that, this CPU connects this control circuit and this embedded controller by a System Management Bus.
9. electronic installation according to claim 8, is characterized in that, when this CPU calculate the power used reach first power threshold time, send this second control signal to reduce this dividing potential drop pressure reduction of this filter.
10. electronic installation according to claim 4, is characterized in that, this packaging body is of a size of length 7 millimeters, width 7 millimeters and height 3 millimeters.
11. electronic installations according to claim 4, is characterized in that, this inductor comprises one first pin and one second pin, and this negative temperature coefficient resister comprises one the 3rd pin and one the 4th pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484758.2A CN104578748B (en) | 2013-10-16 | 2013-10-16 | Passive component with temperature compensation function and electronic device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484758.2A CN104578748B (en) | 2013-10-16 | 2013-10-16 | Passive component with temperature compensation function and electronic device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104578748A true CN104578748A (en) | 2015-04-29 |
| CN104578748B CN104578748B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310484758.2A Active CN104578748B (en) | 2013-10-16 | 2013-10-16 | Passive component with temperature compensation function and electronic device using same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002477A (en) * | 2021-10-28 | 2022-02-01 | 中科可控信息产业有限公司 | Current detection circuit of switching power supply |
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| US6525395B1 (en) * | 1999-10-19 | 2003-02-25 | Murata Manufacturing Co., Ltd. | Chip-type composite electronic component and manufacturing method thereof |
| US20070241727A1 (en) * | 2006-04-18 | 2007-10-18 | Dell Products L.P. | Temperature-compensated inductor DCR dynamic current sensing |
| CN102624230A (en) * | 2011-01-31 | 2012-08-01 | 立锜科技股份有限公司 | Adaptive temperature compensation circuit and method |
| CN102967755A (en) * | 2011-09-01 | 2013-03-13 | 鸿富锦精密工业（深圳）有限公司 | Inductive current detecting circuit |
| TW201324110A (en) * | 2011-12-12 | 2013-06-16 | Hon Hai Prec Ind Co Ltd | Buck converting circuit and server using same |
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2013
- 2013-10-16 CN CN201310484758.2A patent/CN104578748B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6525395B1 (en) * | 1999-10-19 | 2003-02-25 | Murata Manufacturing Co., Ltd. | Chip-type composite electronic component and manufacturing method thereof |
| US20070241727A1 (en) * | 2006-04-18 | 2007-10-18 | Dell Products L.P. | Temperature-compensated inductor DCR dynamic current sensing |
| CN102624230A (en) * | 2011-01-31 | 2012-08-01 | 立锜科技股份有限公司 | Adaptive temperature compensation circuit and method |
| CN102967755A (en) * | 2011-09-01 | 2013-03-13 | 鸿富锦精密工业（深圳）有限公司 | Inductive current detecting circuit |
| TW201324110A (en) * | 2011-12-12 | 2013-06-16 | Hon Hai Prec Ind Co Ltd | Buck converting circuit and server using same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114002477A (en) * | 2021-10-28 | 2022-02-01 | 中科可控信息产业有限公司 | Current detection circuit of switching power supply |
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| Publication number | Publication date |
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| CN104578748B (en) | 2017-04-12 |
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