CN1363981A - electric power converter with adjustable output voltage - Google Patents
electric power converter with adjustable output voltage Download PDFInfo
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- CN1363981A CN1363981A CN 01101384 CN01101384A CN1363981A CN 1363981 A CN1363981 A CN 1363981A CN 01101384 CN01101384 CN 01101384 CN 01101384 A CN01101384 A CN 01101384A CN 1363981 A CN1363981 A CN 1363981A
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Abstract
The invention relates to a converter of electric power being capable of outputting adjustable voltage, including output end of positive and negative voltage, voltage comparator, voltage-adjusted impedance and current source. The voltage comparator has first input end, second input end and comparison output end. Second input end is used to receive the reference voltage. The comparison output end is electrically connected to one of the ends of feedback resistance. First input end is electrically connected to another end of the feedback resistance and one of the ends of load impedance. Another end of the load impedance is electrically connected to one of the ends of current source and voltage-adjusted impedance. Another end of the voltage-adjusted impedance is electrically connected to output end of positive voltage.
Description
The present invention relates to a kind of electric power converter, particularly a kind of electric power converter of adjustable output voltage.
Along with the progress of semiconductor fabrication, semi-conductive operating voltage (operating voltage) also reduces gradually.Former, semi-conductive normal operating voltage normally is fixed on as 12 volts, on the magnitude of voltage such as 5 volts or 3.3 volts.Yet operating voltage now not only is lower than 3.3 volts, and the more important thing is, these operating voltages no longer have been fixed values.For instance, having among the high speed central processing unit (CPU) of communicating with each other with chipset and memory or other devices, in order to try to achieve the highest execution efficient, just must self-propelled adjustment operating voltage.Just, must be able to self-propelledly be adjusted by the output voltage of power supply supply.
And in the design of most electric power converters (power converter), circuit of single-chip integrated (monolithic integrated circuit is used in the capital, monolithic IC) as pulse width modulation (pulsewidth modulation, PWM) integrated circuit.With reference to Fig. 1, it has shown employed electric power converter 10 of known technology and inner partial circuit figure.For the control impuls width, pulse width modulation integrated circuit 100 just uses a voltage comparator 110, compares with voltage+Vo and the reference voltage Vref that electric power converter 10 is exported.And for the output voltage of sequencing (programming) electric power converter 10, semiconductor manufacturer just builds among pulse width modulation integrated circuit (PWM IC) 100 and puts a digital/analog converter (A/D Converter) 120.120 of digital/analog converters are according to the digital signals (digital signal) of input, and as VID0, VID1, VID2 determine the reference voltage Vref of being exported by digital/analog converter 120 to VIDn etc.Wherein VID0-VIDn is called as electric voltage identification code (voltageidentificantion codes).
By the bit of adjusting electric voltage identification code VID0-VIDn, size that just can control output voltage.With 5 electric voltage identification code VID0-VID5 is example, and for example electric voltage identification code VID0-VID5 is at 1 o'clock, and representing output voltage is 0V, and to represent output voltage be 1.85V and electric voltage identification code VID0-VID5 is 0.Each change in regular turn therebetween can cause output voltage that the variation of 0.025V is arranged, and just can reach the purpose of adjusting output voltage by adjusting electric voltage identification code VID0-VID5.The position permutation and combination of aforesaid electric voltage identification code VID0-VID5 and the relation between output voltage are called bitmap spectrum (bit map).
Yet owing to there are many parameters in semiconductor fabrication, therefore two different semiconductor element necessary operations voltages just may be different.And, in the structure of above-mentioned electric power converter 10, just must design pulse width modulation integrated circuit with different electric voltage identification codes at different operating voltages.But a kind of pulse width modulation integrated circuit with different electric voltage identification codes of every design, the common needed time all can be above 1 year.Like this permanent research and development time, for changing fast semi-conductor market, can saying so, slow action cannot save a critical situation.
In view of this, the present invention proposes a kind of electric power converter of adjustable output voltage, this electric power converter is to do by a small margin adjustment with the pulse width modulation integrated circuit that any electric voltage identification code is provided, make the electric power converter of being made by the pulse width modulation integrated circuit that utilizes same electric voltage identification code, the operating voltage of various scopes can be provided easily.
The present invention proposes a kind of electric power converter of adjustable output voltage, and it has a positive voltage output end and a negative voltage output.This electric power converter comprises a voltage comparator, and a voltage is adjusted impedance, and a current source.Wherein, voltage comparator has two inputs and a comparison output.This compares the end that output is electrically coupled to a feedback impedance.An input electric property coupling of voltage comparator is the other end of feedback impedance and an end of a load impedance so far.The other end of this load impedance then is electrically coupled to an end of current source and voltage adjustment impedance.The other end that this voltage is adjusted impedance then is electrically coupled to positive voltage output end.In addition, another input of voltage comparator then receives a reference voltage, the reference with as the voltage comparator comparative voltage time.
Wherein, above-mentioned reference voltage is exported by digital/analog converter.This digital/analog converter receives one group of electric voltage identification code (voltage identification code), and exports the corresponding reference voltage of electric voltage identification code therewith.
With regard to another aspect of the present invention, adjust the formed one group of voltage-regulating circuit of impedance by current source and voltage, can be electrically coupled on the negative voltage output of electric power converter, reach the purpose of the output voltage of adjusting electric power converter by the voltage of adjusting the negative voltage output.
With regard to another aspect of the present invention, can be with positive voltage output end and negative voltage output electric property coupling together with current source, and respectively at the current path of current source to positive voltage output end, and current source is to the current path of negative voltage output, and voltage of electric property coupling is adjusted impedance separately.By this, current source can be adjusted the voltage that positive and negative voltage output end is exported simultaneously, reaches onesize voltage change with less current.
The present invention proposes a kind of electric power converter of adjustable output voltage in addition, and it has a positive voltage output end, a negative voltage output, and a pulse width modulation integrated circuit.This pulse width modulation integrated circuit is according to one group of electric voltage identification code, through a load impedance corresponding adjustment voltage is outputed to positive voltage output end.This electric power converter comprises a voltage adjustment impedance, and a current source.In one embodiment of the invention, this voltage is adjusted impedance one end and is electrically coupled to load impedance, and the other end then is electrically coupled to positive voltage output end.One end of current source then is electrically coupled to voltage and adjusts between impedance and the load impedance.
In another embodiment of the present invention, it then is that an end is electrically coupled to negative output terminal that voltage is adjusted impedance, and the other end is electrically coupled to the negative voltage output.One end of current source then is to be electrically coupled to voltage to adjust between impedance and the negative output terminal.
In yet another embodiment of the present invention, then be to have two voltages to adjust impedance and a current source.Wherein, the end that first voltage is adjusted impedance is electrically coupled to load impedance, and the other end then is electrically coupled to positive voltage output end.It then is that an end is electrically coupled to negative output terminal that another voltage is adjusted impedance, and the other end is electrically coupled to the negative voltage output.And an end of current source is electrically coupled to load impedance and first voltage is adjusted between the impedance, and the other end then is electrically coupled to negative output terminal and another voltage is adjusted between the impedance.
In sum, the present invention forms by current source and voltage adjustment impedance, has the circuit of increase and decrease voltage function, the scope of the voltage that the change electric power converter can be exported.So, just need not design pulse width modulation integrated circuit with different electric voltage identification codes.Thus, just can save the many research and development time.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail below:
The simple declaration of accompanying drawing:
What Fig. 1 illustrated is employed electric power converter of known technology and inner partial circuit calcspar;
What Fig. 2 illustrated is according to the electric power converter of first preferred embodiment of the present invention and the partial circuit calcspar of inside;
What Fig. 3 illustrated is according to the electric power converter of second preferred embodiment of the present invention and the partial circuit calcspar of inside; And
What Fig. 4 illustrated is according to the electric power converter of the 3rd preferred embodiment of the present invention and the partial circuit calcspar of inside.
Notion of the present invention is under the situation that does not change the bitmap spectrum, utilizes current source and voltage-regulation impedance to adjust the bound of output voltage.So, just can use existing bitmap spectrum to reach the purpose of change voltage, and needn't redesign electric voltage identification code.
With reference to Fig. 2, what it illustrated is according to the electric power converter of first preferred embodiment of the present invention and the partial circuit calcspar of inside.Among electric power converter (power converter) 20, include a pulse width modulation integrated circuit (pulse width modulation integrated circuits, abbreviate PWMIC afterwards as) 200, feedback impedance 212, load impedance 214, current source 230 and voltage are adjusted impedance 240.Wherein, PWMIC 200 adjusts impedance 240 to pass through load impedance 214 with voltage according to the electric voltage identification code of being imported (voltage identificationcode) VID0-VIDn, adjusts voltage with one and outputs on the positive voltage output end+Vo of electric power converter 20.
And among PWMIC 200, then comprised a voltage comparator 210, an and digital/analog converter (D/A Converter) 220.Wherein, digital/analog converter 220 is in order to receiving aforesaid electric voltage identification code VID0-VIDn, and by the reference voltage Vref of reference voltage end 222 outputs corresponding to this electric voltage identification code.This reference voltage Vref just is input to the input 217 of voltage comparator 210, with carry out as voltage comparator 210 voltage ratio than the time a benchmark.In addition, the voltage of being exported by the comparison output 219 of voltage comparator 210 can be feedback to another input 215 of voltage comparator 210 through after the feedback impedance 212, with as the used voltage relatively time the with reference voltage Vref.
The voltage of being exported by the comparison output 219 of voltage comparator 210 is through after the feedback impedance 212, can be again by load impedance 214, and current source 230 is adjusted impedance 240 with voltage and is adjusted.This adjusts voltage later, and just above-mentioned adjustment voltage will be output on the positive voltage output end+Vo of electric power converter 20, to adjust the magnitude of voltage on positive voltage output end+Vo.
Because in stable state, the voltage that two inputs of voltage comparator are imported should be identical, therefore in first above-mentioned embodiment, the voltage that positive voltage output end+Vo exported should be:
Vo＝Vref+I
*R
Wherein, I is the electric current that current source provides, and R then is the resistance value that voltage is adjusted impedance.Therefore as can be known,, or adjust the resistance value of resistance R, just can reach the purpose of the output voltage of adjustment electric power converter by size, the direction of adjusting electric current I.
Next with reference to Fig. 3, it has shown electric power converter and inner partial circuit calcspar according to second preferred embodiment of the present invention.Among electric power converter 30, include a PWMIC 300, feedback impedance 312, load impedance 314, current source 330 and voltage are adjusted impedance 340.Wherein, PWMIC 300 is according to the electric voltage identification code VID0-VIDn that is imported, and adjusts voltage by load impedance 314 with corresponding one and outputs on the positive voltage output end+Vo of electric power converter 30.
And among PWMIC 300, then comprised a voltage comparator 310, and digital/analog converter 320.Wherein, digital/analog converter 320 is in order to receiving aforesaid electric voltage identification code VID0-VIDn, and by the reference voltage Vref of reference voltage end 322 outputs corresponding to this electric voltage identification code.This reference voltage Vref just is input to the input 317 of voltage comparator 310, with carry out as voltage comparator 310 voltage ratio than the time a benchmark.In addition, the voltage of being exported by the comparison output 319 of voltage comparator 310 can be feedback to another input 315 of voltage comparator 310 through after the feedback impedance 312, with as the used voltage relatively time the with reference voltage Vref.
In addition, also has a negative output terminal 325 at digital/analog converter 320.Negative output terminal 325 is to adjust impedance 340 and be electrically coupled on the negative voltage output-Vo of electric power converter 30 through overvoltage.So, the voltage on negative voltage output-Vo just can and be adjusted by voltage source 330 and voltage adjustment impedance 340.
In second above-mentioned embodiment, the magnitude of voltage that negative voltage output-Vo adjusts 340 energy adjustment of impedance by current source 330 and voltage should be:
Vo＝I
*R
Wherein, I is the electric current that current source 330 is provided, and R then is the resistance value that voltage is adjusted impedance 340.Therefore as can be known,, or adjust the resistance value of resistance R, just can reach the purpose of the output voltage of adjustment electric power converter by size, the direction of adjusting electric current I.
Next with reference to Fig. 4, it has shown electric power converter and inner partial circuit calcspar according to the 3rd preferred embodiment of the present invention.Among electric power converter 40, comprise a PWMIC 400, feedback impedance 412, load impedance 414, current source 430 and two voltages are adjusted impedance 440 and 450.Wherein, PWMIC 400 is according to the electric voltage identification code VID0-VIDn that is imported, and adjusts impedance 440 by load impedance 414 and voltage, and corresponding adjustment voltage is outputed on the positive voltage output end+Vo of electric power converter 40.
And among PWMIC 400, then comprised a voltage comparator 410, and digital/analog converter 420.Wherein, digital/analog converter 420 is in order to receiving aforesaid electric voltage identification code VID0-VIDn, and by the reference voltage Vref of reference voltage end 422 outputs corresponding to this electric voltage identification code.This reference voltage Vref is input to the input 417 of voltage comparator 410, with carry out as voltage comparator 410 voltage ratio than the time a benchmark.In addition, the voltage of being exported by the comparison output 419 of voltage comparator 410 can be feedback to another input 415 of voltage comparator 410 through after the feedback impedance 412, with as the used voltage relatively time the with reference voltage Vref.
In addition, on digital/analog converter 420, also has a negative output terminal 425.Negative output terminal 425 is to adjust impedance 450 and be electrically coupled on the negative voltage output-Vo of electric power converter 40 through overvoltage.So, the voltage on negative voltage output-Vo just can and be adjusted by current source 430 and voltage adjustment impedance 450.
In the above-described embodiment, be to use same current source because two voltages are adjusted impedances, therefore to the output voltage of electric power converter (influence that+Vo-(Vo)) is caused will be:
(+Vo-(-Vo))＝I
*(R1+R2)
Wherein, R1, R2 are respectively the resistance values that two voltages are adjusted impedance.
In sum, existing that advantage outline of the present invention is as follows.The present invention is by having the circuit that increases and decreases voltage function, the scope of the voltage that the change electric power converter can be exported.So, just can save the time of the different PWMIC of many research and development.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention should be with being as the criterion that the claim scope is defined.
Claims (15)
1. the electric power converter of an adjustable output voltage has a positive voltage output end and a negative voltage output, comprising:
One voltage comparator, this voltage comparator has a first input end, and one second input is with a comparison output;
One voltage is adjusted impedance; And
One current source;
Wherein, this comparison output is electrically coupled to an end of a feedback impedance, this first input end then is electrically coupled to the other end of this feedback impedance and an end of a load impedance, the other end of this load impedance then is electrically coupled to an end of this current source and this voltage adjustment impedance, the other end that this voltage is adjusted impedance is electrically coupled to this positive voltage output end, and this second input then receives a reference voltage.
2. electric power converter as claimed in claim 1, wherein this reference voltage is exported by a digital/analog converter, and this digital/analog converter receives an electric voltage identification code, and output and corresponding this reference voltage of this electric voltage identification code.
3. electric power converter as claimed in claim 1, wherein this voltage adjustment impedance is a resistance.
4. the electric power converter of an adjustable output voltage has a positive voltage output end and a negative voltage output, comprising:
One voltage comparator, this voltage comparator has a first input end, and one second input is with a comparison output;
One digital/analog converter has a reference voltage output terminal and a negative output terminal, and this digital/analog converter receives an electric voltage identification code, and in this reference voltage output terminal output and the corresponding reference voltage of this electric voltage identification code;
One voltage is adjusted impedance; And
One current source;
Wherein, this comparison output is electrically coupled to an end of a feedback impedance, this first input end then is electrically coupled to the other end of this feedback impedance and an end of a load impedance, and the other end of this load impedance is electrically coupled to this positive voltage output end, and this second input then receives this reference voltage;
Wherein, this negative output terminal is electrically coupled to an end of this current source and this power supply adjustment impedance, and the other end that this voltage is adjusted impedance then is electrically coupled to this negative voltage output.
5. electric power converter as claimed in claim 4, wherein this voltage adjustment impedance is a resistance.
6. the electric power converter of an adjustable output voltage has a positive voltage output end and a negative voltage output, comprising:
One voltage comparator, this voltage comparator has a first input end, and one second input is with a comparison output;
One digital/analog converter has a reference voltage output terminal and a negative output terminal, and this digital/analog converter receives an electric voltage identification code, and in this reference voltage output terminal output and the corresponding reference voltage of this electric voltage identification code;
One first voltage is adjusted impedance;
One second voltage is adjusted impedance; And
One current source has one first end and one second end;
Wherein, this comparison output is electrically coupled to an end of a feedback impedance, this first input end then is electrically coupled to the other end of this feedback impedance and an end of a load impedance, the other end of this load impedance is electrically coupled to this first end of this current source and this first voltage adjustment impedance, and the other end that this first voltage is adjusted impedance then is electrically coupled to this positive voltage output end, and this second input then receives a reference voltage;
Wherein, this negative output terminal is electrically coupled to this second end of this current source and the end that this second voltage is adjusted impedance, and the other end that this second voltage is adjusted impedance then is electrically coupled to this negative voltage output.
7. electric power converter as claimed in claim 6, wherein this first voltage adjustment impedance is a resistance.
8. electric power converter as claimed in claim 6, wherein this second voltage adjustment impedance is a resistance.
9. the electric power converter of an adjustable output voltage, have a positive voltage output end, a negative voltage output, an and pulse width modulation integrated circuit, this pulse width modulation integrated circuit is according to an electric voltage identification code, adjust voltage to this positive voltage output end through a load impedance to export corresponding one, this electric power converter comprises:
One voltage is adjusted impedance, and an end is electrically coupled to this load impedance, and the other end then is electrically coupled to this positive voltage output end; And
One current source, this current source one end are electrically coupled to this voltage and adjust between impedance and this load impedance.
10. electric power converter as claimed in claim 9, wherein this voltage adjustment impedance is a resistance.
11. the electric power converter of an adjustable output voltage, have a positive voltage output end, a negative voltage output, an and pulse width modulation integrated circuit, this pulse width modulation integrated circuit has a negative output terminal, and this pulse width modulation integrated circuit is according to an electric voltage identification code, adjust voltage to this positive voltage output end through a load impedance to export corresponding one, this electric power converter comprises:
One voltage is adjusted impedance, and an end is electrically coupled to this negative output terminal, and the other end then is electrically coupled to this positive voltage output end; And
One current source, an end of this current source are electrically coupled to this voltage and adjust between impedance and this negative output terminal.
12. electric power converter as claimed in claim 11, wherein this voltage adjustment impedance is a resistance.
13. the electric power converter of an adjustable output voltage, have a positive voltage output end, a negative voltage output, an and pulse width modulation integrated circuit, this pulse width modulation integrated circuit has a negative output terminal, and this pulse width modulation integrated circuit is according to an electric voltage identification code, adjust voltage to this positive voltage output end through a load impedance to export corresponding one, this electric power converter comprises:
One first voltage is adjusted impedance, and an end is electrically coupled to this load impedance, and the other end then is electrically coupled to this positive voltage output end;
One second voltage is adjusted impedance, and an end is electrically coupled to this negative output terminal, and the other end then is electrically coupled to this negative voltage output; And
One current source, an end are electrically coupled to this load impedance and this first voltage is adjusted between the impedance, and the other end then is electrically coupled to this negative output terminal and this second voltage is adjusted between the impedance.
14. electric power converter as claimed in claim 13, wherein this first voltage adjustment impedance is a resistance.
15. electric power converter as claimed in claim 13, wherein this second voltage adjustment impedance is a resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011013842A CN1159831C (en) | 2001-01-05 | 2001-01-05 | Electric Power converter with adjustable output voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011013842A CN1159831C (en) | 2001-01-05 | 2001-01-05 | Electric Power converter with adjustable output voltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1363981A true CN1363981A (en) | 2002-08-14 |
| CN1159831C CN1159831C (en) | 2004-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011013842A Expired - Fee Related CN1159831C (en) | 2001-01-05 | 2001-01-05 | Electric Power converter with adjustable output voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1159831C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9484824B2 (en) | 2005-08-26 | 2016-11-01 | Power Integrations, Inc. | Method and apparatus for digital control of a switching regulator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9582054B2 (en) | 2013-06-17 | 2017-02-28 | System General Corp. | Method and apparatus for selecting the output of programmable power adapter |
-
2001
- 2001-01-05 CN CNB011013842A patent/CN1159831C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9484824B2 (en) | 2005-08-26 | 2016-11-01 | Power Integrations, Inc. | Method and apparatus for digital control of a switching regulator |
| CN103762847B (en) * | 2005-08-26 | 2017-12-15 | 电力集成公司 | Method and apparatus for digital control of a switching regulator |
| US10224820B2 (en) | 2005-08-26 | 2019-03-05 | Power Integrations, Inc. | Method and apparatus for digital control of a switching regulator |
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| Publication number | Publication date |
|---|---|
| CN1159831C (en) | 2004-07-28 |
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| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Taida Electronic and Power Source (Dongguang) Co., Ltd. Assignor: Delta Optoelectronics Inc. Contract fulfillment period: 2005.1.1 to 2011.3.31 contract change Contract record no.: 2009990000774 Denomination of invention: electric power converter with adjustable output voltage Granted publication date: 20040728 License type: Exclusive license Record date: 2009.7.22 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2005.1.1 TO 2011.3.31; CHANGE OF CONTRACT Name of requester: TAIDA ELECTRONICS POWER SUPPLY( DONGGUAN ) CO., LT Effective date: 20090722 |
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Granted publication date: 20040728 Termination date: 20160105 |
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