CN205693559U - Charge pump drive circuit - Google Patents
Charge pump drive circuit Download PDFInfo
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- CN205693559U CN205693559U CN201620642046.8U CN201620642046U CN205693559U CN 205693559 U CN205693559 U CN 205693559U CN 201620642046 U CN201620642046 U CN 201620642046U CN 205693559 U CN205693559 U CN 205693559U
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- charge pump
- output voltage
- electric charge
- signal
- clock control
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Abstract
This application discloses charge pump drive circuit, including: electric charge pump module, it is used for producing output voltage；Sample circuit, is connected to the outfan of described electric charge pump module, for obtaining the sampled signal characterizing described output voltage；Comparator, is connected to described sample circuit, for comparing to produce error signal with reference voltage by described sampled signal；Clock control module, it is connected between described comparator and described electric charge pump module, for producing clock control signal according to outside clock signal and described error signal, wherein, described sample circuit and described comparator composition feedback path so that the clock control signal that clock control module produces regulates according to the change of output voltage.This charge pump drive circuit selects the clock start-up time of electric charge pump according to output voltage, while providing stable high output voltage, can reduce system power dissipation.
Description
Technical field
This utility model relates to electronic circuit technology, relates more specifically to a kind of charge pump drive circuit.
Background technology
Electric charge pump is the switch converters utilizing electric capacity storage energy, wherein, utilizes switch that electric capacity in power supply and is put
Switch between electricity condition, such that it is able to promote or reduce supply voltage.In mobile terminal or portable electric appts, power supply electricity
The voltage in source is likely lower than running voltage, and after the voltage of power supply can be provided by electric charge pump, system works, such as, and electric charge
The voltage that pump produces is in the range of 3.3V to 4.0V, thus meets the job demand of electronic equipment.
But, electric charge pump self also can consume electric energy in above-mentioned power conversion process.Phase electric charge to be further improved pump
Control circuit so that the charging and discharging process of electric charge matches with load, to reduce the power consumption of electric charge pump.
Utility model content
The purpose of this utility model is to provide a kind of charge pump drive circuit for promoting supply voltage, wherein, uses
Nor gate selects the clock start-up time of electric charge pump, while providing stable high output voltage, can reduce system power dissipation.
According to this utility model embodiment, it is provided that a kind of charge pump drive circuit, it is characterised in that including: electric charge pump mould
Block, is used for producing output voltage；Sample circuit, is connected to the outfan of described electric charge pump module, is used for obtaining sign described defeated
Go out the sampled signal of voltage；Comparator, is connected to described sample circuit, for described sampled signal being compared with reference voltage
To produce error signal；Clock control module, is connected between described comparator and described electric charge pump module, for according to outside
Clock signal and described error signal produce clock control signal, wherein, described sample circuit and described comparator composition are anti-
Feeder footpath so that the clock control signal that clock control module produces regulates according to the change of output voltage.
Preferably, also include that filter circuit, described filter circuit are connected between described electric charge pump module and external loading,
For described output voltage is filtered.
Preferably, described sample circuit is the potential-divider network including at least two resistance, described at least two resistant series
It is connected between outfan and the ground of described electric charge pump module.
Preferably, described clock control module is nor gate, and described nor gate includes for receiving external timing signal
First input end and for receiving the second input of described error signal.
Preferably, described nor gate selects the clock start-up time of electric charge pump according to described output voltage.
This charge pump drive circuit works in degeneration factor again and again, produces a stable high output electricity
Pressure, opens the power consumption of system of saving simultaneously by controlling charge pump clock.
Accompanying drawing explanation
By description to this utility model embodiment referring to the drawings, of the present utility model above-mentioned and other mesh
, feature and advantage will be apparent from, in the accompanying drawings:
Fig. 1 illustrates the schematic circuit of the charge pump drive circuit according to this utility model embodiment.
Detailed description of the invention
It is more fully described various embodiment of the present utility model hereinafter with reference to accompanying drawing.In various figures, identical
Element uses same or similar reference to represent.For the sake of clarity, the various piece in accompanying drawing is not drawn to paint
System.
With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 illustrates the schematic circuit of the charge pump drive circuit according to this utility model embodiment.This electric charge drives
Circuit includes electric charge pump module 101, comparator 102, sample circuit 103, filter circuit 104 and clock control module 105.
Electric charge pump module 101 includes switch and electric capacity.This switch e.g. power switch pipe, this electric capacity e.g. ceramic electrical
Hold.At work, electric charge pump module 101 receives and enables signal EN and clock control signal OSC_CTRL.Electric charge pump module 101 exists
Enabling after signal EN enables and start working, switch is turned on or off under the control of clock control signal OSC_CTRL so that
Electric capacity alternately stores and release electric energy, thus produces high output voltage HV_OUT.
The in-phase input end of comparator 102 is connected to sample circuit 103, and inverting input is connected to reference voltage source, defeated
Going out end and be connected to electric charge pump module 101. at work via clock control circuit 104, comparator circuit 102 is from sample circuit
103 sampled signals HV_DIV receiving high output voltage HV_OUT, receive reference voltage VREF from reference voltage source, and will adopt
Sample signal HV_DIV compares with reference voltage VREF, thus produces error signal COMP_OUT.When sampled signal HV_DIV is big
When reference voltage VREF, error signal COMP_OUT is high level.When sampled signal HV_DIV is less than reference voltage VREF,
Error signal COMP_OUT is low level.
Sample circuit 103 is connected to the outfan of electric charge pump module 101.Sample circuit 103 e.g. include resistance R1 and
The potential-divider network of R2.In this embodiment, resistance R1 and R2 is connected in series between outfan and ground, thus sampled signal HV_
DIV is the voltage signal proportional to high output voltage HV_OUT.
Filter circuit 104 is connected between the outfan of electric charge pump module 101 and load.Such as, filter circuit 104 is such as
It is to include resistance R3 and the resistance-capacitance network of electric capacity C1.In this embodiment, resistance R3 is connected in series in outfan and load
Between, electric capacity C1 is connected between node and the ground between resistance R3 and load.Resistance R3 and electric capacity C1 forms RC wave filter, with
Stable smooth high output voltage HV_OUT is provided.
Clock control module 105 is connected between comparator 102 and electric charge pump module 101.Clock control module 105 is such as
It it is nor gate.One input of clock control module 105 receives the clock letter of the constant frequency such as produced by crystal oscillating circuit
Number OSC_IN, another input receives error signal COMP_OUT from comparator 102, and provides clock control at outfan
Signal OSC_CTRL.
The feedback control charge pump clock according to output voltage of this charge pump drive circuit is opened.Upon power-up of the system,
Opening and enable signal EN, provide clock signal OSC_IN, charge pump circuit is started working.Output voltage HV_OUT voltage starts to rise
High.When being increased to more than this voltage of (R1+R2) * VREF/R1, error signal COMP_OUT signal becomes high electricity from low level
Flat, thus by the nor gate of clock control module 105, close clock control signal OSC_CTRL signal.Output voltage HV_
OUT maintains (R1+R2) * VREF/R1 voltage.As time goes on, output voltage HV_OUT is fallen one by load consumption below
Fixed electric charge, output voltage HV_OUT reduces.This voltage of (R1+R2) * VREF/R1 is fallen below at output voltage HV_OUT
Time, error signal COMP_OUT signal is low level.By the nor gate of clock control module 105, open clock control signal
OSC_CTRL signal, output voltage HV_OUT begins to ramp up.
The work that this charge pump drive circuit goes round and begins again in above-mentioned degeneration factor, produces a stable output electricity
Pressure HV_OUT.Owing to using nor gate to select the clock start-up time of electric charge pump, while stable high output voltage is provided,
System power dissipation can be reduced.
According to embodiment of the present utility model as described above, these embodiments do not have all of details of detailed descriptionthe,
Also the specific embodiment that this utility model is only described it is not intended to.Obviously, as described above, a lot of amendments and change can be made
Change.These embodiments are chosen and specifically described to this specification, is to preferably explain that principle of the present utility model and reality should
With, so that skilled artisan can utilize this utility model and repairing on the basis of this utility model well
Change use.Protection domain of the present utility model should be defined in the range of standard with this utility model claim.
Claims (5)
1. a charge pump drive circuit, it is characterised in that including:
Electric charge pump module, is used for producing output voltage；
Sample circuit, is connected to the outfan of described electric charge pump module, for obtaining the sampled signal characterizing described output voltage；
Comparator, is connected to described sample circuit, is used for comparing described sampled signal with reference voltage to produce error letter
Number；
Clock control module, is connected between described comparator and described electric charge pump module, for according to outside clock signal
Clock control signal is produced with described error signal,
Wherein, described sample circuit and described comparator composition feedback path so that the clock control that clock control module produces
Signal regulates according to the change of output voltage.
Charge pump drive circuit the most according to claim 1, it is characterised in that also include filter circuit, described filtered electrical
Road is connected between described electric charge pump module and external loading, for being filtered described output voltage.
Charge pump drive circuit the most according to claim 1, it is characterised in that described sample circuit is to include at least two
The potential-divider network of resistance, described at least two resistant series is connected between outfan and the ground of described electric charge pump module.
Charge pump drive circuit the most according to claim 1, it is characterised in that described clock control module is nor gate,
Described nor gate includes the first input end for receiving external timing signal and defeated for receiving the second of described error signal
Enter end.
Charge pump drive circuit the most according to claim 4, it is characterised in that described nor gate is according to described output voltage
Select the clock start-up time of electric charge pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620642046.8U CN205693559U (en) | 2016-06-22 | 2016-06-22 | Charge pump drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620642046.8U CN205693559U (en) | 2016-06-22 | 2016-06-22 | Charge pump drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205693559U true CN205693559U (en) | 2016-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620642046.8U Active CN205693559U (en) | 2016-06-22 | 2016-06-22 | Charge pump drive circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787689A (en) * | 2016-12-26 | 2017-05-31 | 格科微电子（上海）有限公司 | A kind of charge pump apparatus and its feedback |
| CN107592011A (en) * | 2017-09-19 | 2018-01-16 | 中国科学院微电子研究所 | A kind of charge pump system and three dimensional NAND memory |
| CN108566126A (en) * | 2018-05-07 | 2018-09-21 | 深圳市振华微电子有限公司 | It is a kind of based on or door electric machine control system |
| CN110459250A (en) * | 2019-08-23 | 2019-11-15 | 上海华虹宏力半导体制造有限公司 | A kind of charge pump circuit |
| CN114157138A (en) * | 2021-07-30 | 2022-03-08 | 沈阳工业大学 | High-voltage switch capacitance type voltage converter |
| CN114815941A (en) * | 2021-01-27 | 2022-07-29 | 北京京东方光电科技有限公司 | Voltage regulation and control circuit |
| CN115940631A (en) * | 2023-01-10 | 2023-04-07 | 中茵微电子(南京)有限公司 | Low ripple charge pump circuit |
-
2016
- 2016-06-22 CN CN201620642046.8U patent/CN205693559U/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787689A (en) * | 2016-12-26 | 2017-05-31 | 格科微电子（上海）有限公司 | A kind of charge pump apparatus and its feedback |
| CN106787689B (en) * | 2016-12-26 | 2023-09-19 | 格科微电子（上海）有限公司 | Charge pump device and feedback control method thereof |
| CN107592011B (en) * | 2017-09-19 | 2019-07-12 | 中国科学院微电子研究所 | A kind of charge pump system and three dimensional NAND memory |
| CN107592011A (en) * | 2017-09-19 | 2018-01-16 | 中国科学院微电子研究所 | A kind of charge pump system and three dimensional NAND memory |
| CN108566126A (en) * | 2018-05-07 | 2018-09-21 | 深圳市振华微电子有限公司 | It is a kind of based on or door electric machine control system |
| CN108566126B (en) * | 2018-05-07 | 2023-11-28 | 深圳市振华微电子有限公司 | Motor control system based on OR gate |
| CN110459250A (en) * | 2019-08-23 | 2019-11-15 | 上海华虹宏力半导体制造有限公司 | A kind of charge pump circuit |
| CN110459250B (en) * | 2019-08-23 | 2021-05-07 | 上海华虹宏力半导体制造有限公司 | Charge pump circuit |
| CN114815941A (en) * | 2021-01-27 | 2022-07-29 | 北京京东方光电科技有限公司 | Voltage regulation and control circuit |
| CN114815941B (en) * | 2021-01-27 | 2023-11-17 | 北京京东方光电科技有限公司 | Voltage regulation circuit |
| CN114157138A (en) * | 2021-07-30 | 2022-03-08 | 沈阳工业大学 | High-voltage switch capacitance type voltage converter |
| CN114157138B (en) * | 2021-07-30 | 2024-05-07 | 沈阳工业大学 | High-voltage switch capacitance type voltage converter |
| CN115940631A (en) * | 2023-01-10 | 2023-04-07 | 中茵微电子(南京)有限公司 | Low ripple charge pump circuit |
| CN115940631B (en) * | 2023-01-10 | 2023-11-17 | 中茵微电子(南京)有限公司 | Low ripple charge pump circuit |
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