CN105634268A - Charge pump power supply with low ripple voltage - Google Patents
Charge pump power supply with low ripple voltage Download PDFInfo
- Publication number
- CN105634268A CN105634268A CN201610028531.0A CN201610028531A CN105634268A CN 105634268 A CN105634268 A CN 105634268A CN 201610028531 A CN201610028531 A CN 201610028531A CN 105634268 A CN105634268 A CN 105634268A
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- China
- Prior art keywords
- charge pump
- voltage
- clock
- power supply
- electric charge
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Classifications
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- 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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/073—Charge pumps of the Schenkel-type
-
- 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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/073—Charge pumps of the Schenkel-type
- H02M3/077—Charge pumps of the Schenkel-type with parallel connected charge pump stages
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a charge pump power supply with a low ripple voltage. The charge pump power supply comprises a clock generation circuit used for generating work clock for the charge pumps, N charge pumps used for realizing conversion from low voltages to high voltages, and a voltage regulator used for controlling the magnitude of electric level of the output high voltages of the multiple charge pumps, wherein N is a positive integer greater than or equal to 2. According to the charge pump power supply, one charge pump is divided into N small charge pumps; a time-sharing working mode is adopted, and the N charge pumps output current in sequence; under a condition that the clock frequency is the same as that of the original charge pump system, each output current peak value is about 1/N of that of the original charge pump; the mean value is 1/N of that of the original charge pump, so that the charge pump system has the same output current capacity as the existing charge pump system; however, the current peak value of the charge pump system is only 1/N of that of the original charge pump, so that the output voltage ripple is reduced to be about 1/N of that of the original system consequently.
Description
[technical field]
The present invention relates to charge pumping technique field, particularly to a kind of charge pump power supply with low-ripple voltage.
[background technology]
Electric charge pump, for obtaining the builtin voltage higher than supply voltage, is widely used in the chip such as memorizer, display driving. Charge pump system is mainly made up of clock generation circuit, electric charge pump and voltage adjuster, as shown in Figure 1.
Clock generation circuit generates the clock signal required for electric charge pump.
Electric charge pump realizes by the conversion of low pressure to high pressure. Electric charge pump has multiple way of realization, no matter which kind of adopts, and is all the principle utilizing electric capacity to boot. Starting to export electric current when clock arrives, along with the transfer of electric charge, the voltage on electric capacity is gradually lowered, and output electric current is gradually reduced, as shown in Figure 2.
Voltage adjuster, by the output voltage of electric charge pump is sampled, then compares with a reference voltage, and controlling clock generation circuit is work or stopping, thus controlling the duty of electric charge pump, and the final control realized output-voltage levels height.
Its output of the behavior decision of this continuous switch of charge pump system there will be bigger ripple, it is common that increases filter capacitor at outfan and suppresses ripple, but this can sacrifice very big chip area.
When filter capacitor and clock frequency one timing, in order to obtain relatively larger output current capacity, traditional this working method can cause that very big peak current occurs, thus causing that very big peak voltage occurs in outfan, that is to say very big voltage ripple.
[summary of the invention]
It is an object of the invention to provide a kind of charge pump power supply with low-ripple voltage, the problem big to solve available circuit output voltage ripple.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of charge pump power supply with low-ripple voltage, including:
Clock generation circuit: for generating the work clock of electric charge pump;
N number of electric charge pump: for realizing the low pressure conversion to high pressure;
Voltage adjuster: for controlling the level height of some charge pump output high-pressures;
Wherein, N is the positive integer be more than or equal to 2.
Further, described some electric charge pumps are parallel.
Further, clock generation circuit is used for generating N number of clock, and described N number of clock phase difference is followed successively by 360/N degree, respectively as the work clock of N number of electric charge pump.
Further, voltage adjuster can be realized by resitstance voltage divider and comparator.
Further, the dutycycle of N number of clock is all 50%.
Further, voltage adjuster: for the total voltage of N number of electric charge pump output is sampled, then compare with reference voltage, if sampled voltage is lower than reference voltage, then it is output as high level, making clock forming circuit work on, so that N number of electric charge pump works on, output voltage continues to raise; If sampled voltage is higher than reference voltage, being then output as low level, make clock forming circuit quit work, so that N number of electric charge pump quits work, output voltage reduces under the effect of load current.
Further, N is 2��8.
Relative to prior art, the invention have the advantages that 1 electric charge pump is divided into N number of little electric charge pump by the present invention, the method adopting time-sharing work, N number of electric charge pump is sequentially output electric current, when clock frequency is identical with original charge pump system, each output current peak is about the 1/N of original electric charge pump, average is the 1/N of original electric charge pump, so that this charge pump system has the output current capacity identical with existing charge pump system, but current peak is only about the 1/N of original charge pump system, so that output voltage ripple is about reduced to the 1/N of original system. the present invention can adopt 2 to 8 even more electric charge pumps, and it is all feasible that a clock cycle is divided into 2 to 8 parts of even more parts carry out time-sharing operation, can select according to the voltage ripple size that actual condition can accept.
[accompanying drawing explanation]
Fig. 1 is the circuit theory diagrams of existing charge pump system;
Fig. 2 is the fundamental diagram of existing charge pump output current;
Fig. 3 is the schematic diagram of an embodiment of charge pump power supply of the present invention;
Fig. 4 is the output current work schematic diagram of an embodiment of charge pump power supply of the present invention.
[detailed description of the invention]
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the enforcement in the present invention, all other embodiments that those of ordinary skill in the art obtain under not paying creative work premise, broadly fall into the scope of protection of the invention.
Refer to shown in Fig. 3, a kind of charge pump power supply with low-ripple voltage of the present invention, including:
Clock generation circuit: for generating the work clock of electric charge pump;
Electric charge pump 1, electric charge pump 2, electric charge pump 3, electric charge pump 4: for realizing the low pressure conversion to high pressure. 4 electric charge pumps are in parallel, and total output electric current is 4 charge pump output current sums.
Voltage adjuster: for controlling the level height of charge pump system output high pressure.
Clock generation circuit generates 4 clocks, and 4 clock phase differences are followed successively by 90 degree, respectively as the work clock of 4 electric charge pumps.
Voltage adjuster can be achieved by resitstance voltage divider and comparator.
1 electric charge pump, on the basis of available circuit, is split as 4 little electric charge pumps by the present invention, and meanwhile, clock generation circuit generates 4 tunnel phase places and differs the clock signal of 90 degree successively, and the clock respectively as 4 little electric charge pumps inputs.
The concrete work process of a kind of charge pump power supply with low-ripple voltage of the present invention is as follows:
1, clock forming circuit generates 4 tunnel clock signal clk1, clk2, clk3, clk4;
2, clock signal clk1, clk2, clk3, clk4 frequency are identical, and dutycycle is all 50%;
3, clk2 than clk1 late 1/4th cycles (T/4), that is to say 90 degree; Clk3 is late 1/4th cycles than clk2; Clk4 is late 1/4th cycles than clk3;
4, clk1 inputs as the clock of electric charge pump 1; Clk2 inputs as the clock of electric charge pump 2; Clk3 inputs as the clock of electric charge pump 3; Clk4 inputs as the clock of electric charge pump 4;
5, electric charge pump 1 works under the effect of clock signal clk1, exports electric current iout1;
6,1/4th weeks after dates, electric charge pump 2 works under the effect of clock signal clk2, exports electric current iout2;
7, after four/two cycles, electric charge pump 3 works under the effect of clock signal clk3, exports electric current iout3;
8,3/4ths weeks after dates, electric charge pump 4 works under the effect of clock signal clk4, exports electric current iout4;
9,4 electric charge pumps are in parallel, and total output electric current iout_total is 4 charge pump output current sums;
10, output voltage hv_out is sampled by voltage adjuster, then compare with reference voltage vref, if sampled voltage is lower than reference voltage, then it is output as high level, clock forming circuit is made to work on, thus electric charge pump 1, electric charge pump 2, electric charge pump 3 and electric charge pump 4 work on, improve output voltage; If sampled voltage is higher than reference voltage, being then output as low level, make clock forming circuit quit work, thus electric charge pump 1, electric charge pump 2, electric charge pump 3 and electric charge pump 4 quit work, output voltage then reduces under the effect of load current.
The above embodiment is not limited to only with 4 electric charge pumps, is not limited to be divided into 4 parts to carry out time-sharing operation one clock cycle. Adopting 2 to 8 even more electric charge pumps, it is all feasible that a clock cycle is divided into 2 to 8 parts of even more parts carry out time-sharing operation.
Claims (7)
1. a charge pump power supply with low-ripple voltage, it is characterised in that including:
Clock generation circuit: for generating the work clock of electric charge pump;
N number of electric charge pump: for realizing the low pressure conversion to high pressure;
Voltage adjuster: for controlling the level height of some charge pump output high-pressures;
Wherein, N is the positive integer be more than or equal to 2.
2. a kind of charge pump power supply with low-ripple voltage according to claim 1, it is characterised in that described some electric charge pumps are parallel.
3. a kind of charge pump power supply with low-ripple voltage according to claim 1, it is characterised in that clock generation circuit is used for generating N number of clock, described N number of clock phase difference is followed successively by 360/N degree, respectively as the work clock of N number of electric charge pump.
4. a kind of charge pump power supply with low-ripple voltage according to claim 1, it is characterised in that voltage adjuster can be realized by resitstance voltage divider and comparator.
5. a kind of charge pump power supply with low-ripple voltage according to claim 3, it is characterised in that the dutycycle of N number of clock is all 50%.
6. a kind of charge pump power supply with low-ripple voltage according to claim 1, it is characterized in that, voltage adjuster: for the total voltage of N number of electric charge pump output is sampled, then compare with reference voltage, if sampled voltage is lower than reference voltage, then it is output as high level, makes clock forming circuit work on, so that N number of electric charge pump works on, output voltage continues to raise; If sampled voltage is higher than reference voltage, being then output as low level, make clock forming circuit quit work, so that N number of electric charge pump quits work, output voltage reduces under the effect of load current.
7. a kind of charge pump power supply with low-ripple voltage according to claim 3, it is characterised in that N is 2��8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610028531.0A CN105634268A (en) | 2016-01-15 | 2016-01-15 | Charge pump power supply with low ripple voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610028531.0A CN105634268A (en) | 2016-01-15 | 2016-01-15 | Charge pump power supply with low ripple voltage |
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| CN105634268A true CN105634268A (en) | 2016-06-01 |
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| CN201610028531.0A Pending CN105634268A (en) | 2016-01-15 | 2016-01-15 | Charge pump power supply with low ripple voltage |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958817A (en) * | 2016-06-12 | 2016-09-21 | 北京兆易创新科技股份有限公司 | Charge pump circuit |
| CN108418419A (en) * | 2018-04-17 | 2018-08-17 | 武汉新芯集成电路制造有限公司 | Charge pump |
| CN109412408A (en) * | 2018-12-27 | 2019-03-01 | 普冉半导体（上海）有限公司 | A kind of charge pump circuit and its load driving method |
| CN109756106A (en) * | 2018-12-27 | 2019-05-14 | 西安紫光国芯半导体有限公司 | A kind of method and circuit reducing charge pump system noise |
| CN109889034A (en) * | 2019-04-18 | 2019-06-14 | 北京集创北方科技股份有限公司 | Charge pump circuit, display device and signal processing method |
| WO2020151540A1 (en) * | 2019-01-22 | 2020-07-30 | 上海艾为电子技术股份有限公司 | Charge pump circuit and method for controlling ripple voltage of charge pump circuit |
| CN112165250A (en) * | 2020-10-12 | 2021-01-01 | 唯捷创芯(天津)电子技术股份有限公司 | Charge pump circuit, chip and communication terminal |
| CN112636589A (en) * | 2020-12-31 | 2021-04-09 | 深圳市芯天下技术有限公司 | Circuit for reducing output voltage ripple of charge pump |
| EP4293890A1 (en) * | 2022-06-17 | 2023-12-20 | Infineon Technologies AG | Regulated charge pump with adaptive drive strength |
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| US6600296B2 (en) * | 2001-11-13 | 2003-07-29 | Intel Corporation | Method and semiconductor die with multiple phase power converter |
| US20080191786A1 (en) * | 2007-02-12 | 2008-08-14 | Samsung Electronics Co., Ltd. | High voltage generation circuit and method for generating high voltage |
| CN101286694A (en) * | 2007-04-12 | 2008-10-15 | 三菱电机株式会社 | Dc/dc power conversion device |
| US7683700B2 (en) * | 2008-06-25 | 2010-03-23 | Sandisk Corporation | Techniques of ripple reduction for charge pumps |
| CN104883051A (en) * | 2015-05-27 | 2015-09-02 | 中国航天科技集团公司第九研究院第七七一研究所 | Multi-mode-control configurable-type complementary on-chip negative voltage charge pump circuit |
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2016
- 2016-01-15 CN CN201610028531.0A patent/CN105634268A/en active Pending
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| US6600296B2 (en) * | 2001-11-13 | 2003-07-29 | Intel Corporation | Method and semiconductor die with multiple phase power converter |
| US20080191786A1 (en) * | 2007-02-12 | 2008-08-14 | Samsung Electronics Co., Ltd. | High voltage generation circuit and method for generating high voltage |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958817A (en) * | 2016-06-12 | 2016-09-21 | 北京兆易创新科技股份有限公司 | Charge pump circuit |
| CN105958817B (en) * | 2016-06-12 | 2018-05-04 | 北京兆易创新科技股份有限公司 | A kind of charge pump |
| CN108418419A (en) * | 2018-04-17 | 2018-08-17 | 武汉新芯集成电路制造有限公司 | Charge pump |
| CN109412408A (en) * | 2018-12-27 | 2019-03-01 | 普冉半导体（上海）有限公司 | A kind of charge pump circuit and its load driving method |
| CN109756106A (en) * | 2018-12-27 | 2019-05-14 | 西安紫光国芯半导体有限公司 | A kind of method and circuit reducing charge pump system noise |
| WO2020151540A1 (en) * | 2019-01-22 | 2020-07-30 | 上海艾为电子技术股份有限公司 | Charge pump circuit and method for controlling ripple voltage of charge pump circuit |
| CN109889034A (en) * | 2019-04-18 | 2019-06-14 | 北京集创北方科技股份有限公司 | Charge pump circuit, display device and signal processing method |
| CN112165250A (en) * | 2020-10-12 | 2021-01-01 | 唯捷创芯(天津)电子技术股份有限公司 | Charge pump circuit, chip and communication terminal |
| CN112165250B (en) * | 2020-10-12 | 2022-04-05 | 唯捷创芯(天津)电子技术股份有限公司 | Charge pump circuit, chip and communication terminal |
| WO2022078059A1 (en) * | 2020-10-12 | 2022-04-21 | 唯捷创芯(天津)电子技术股份有限公司 | Charge pump circuit, chip, and communication terminal |
| CN112636589A (en) * | 2020-12-31 | 2021-04-09 | 深圳市芯天下技术有限公司 | Circuit for reducing output voltage ripple of charge pump |
| EP4293890A1 (en) * | 2022-06-17 | 2023-12-20 | Infineon Technologies AG | Regulated charge pump with adaptive drive strength |
| US11936293B2 (en) | 2022-06-17 | 2024-03-19 | Infineon Technologies Ag | Regulated charge pump with adaptive drive strength |
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