CN202004641U - Switched capacitance charge pump with soft-start circuit - Google Patents
Switched capacitance charge pump with soft-start circuit Download PDFInfo
- Publication number
- CN202004641U CN202004641U CN2011200517823U CN201120051782U CN202004641U CN 202004641 U CN202004641 U CN 202004641U CN 2011200517823 U CN2011200517823 U CN 2011200517823U CN 201120051782 U CN201120051782 U CN 201120051782U CN 202004641 U CN202004641 U CN 202004641U
- Authority
- CN
- China
- Prior art keywords
- module
- charge pump
- switching tube
- resistance
- voltage
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The embodiment of the utility model discloses a switched capacitance charge pump with a soft-start circuit; the charge pump comprises a switching tube grid electrode driving module, a voltage-multiplying charge pump module, a switching tube grid electrode low level boosting module and a switch control module, wherein the switching tube grid electrode low level boosting module is used for providing the grid electrode voltage value of a switching tube in the voltage-multiplying charge pump module, needed by the soft start; the switch control module is used for selecting the switching tube grid electrode low level boosting module to be connected with the voltage-multiplying charge pump module when in soft start, and for selecting the switching tube grid electrode driving module to be connected with the voltage-multiplying charge pump module when the soft start is finished. In the technical scheme, by promoting the switching tube grid electrode voltage of the voltage-multiplying charge pump module, the flowing current on the switching tube is reduced, the peak current flowing through the devices is avoided when in soft start, and soft start can be effectively realized through a simple circuit.
Description
Technical field
The utility model relates to switching capacity charge pump circuit field, is specifically related to a kind of switching capacity charge pump with soft starting circuit.
Background technology
Advantages such as white light LEDs has that luminous efficiency height, power consumption are little, long service life and safety and environmental protection are main flow lighting sources of future generation.At present, in compact LED applications such as mobile phone, digital camera and PDA, white light LEDs has been considered to the optimal selection of its back lighting.Portable set is generally by the single-unit lithium battery power supply, but if directly by lithium battery power supply, along with the decline of cell voltage, the luminosity of LED is difficult to keep also stable and then can't be driven, so need the special driving circuit to come driving LED.Characteristics such as charge pump is simple with its circuit structure, volume is little, low EMI become the first-selected drive scheme of portable set.
Figure 1 shows that the structural representation of multiplication of voltage charge pump in the prior art, wherein M1～M4 is a switching tube, and Φ 1 and Φ 2 are the two-phase non-overlapping clock, the turn-on and turn-off of clock Φ 1 control switch pipe M1 and M4, the turn-on and turn-off of clock Φ 2 control switch pipe M2 and M3.Suppose that when initial, capacitor does not all have stored charge, when Φ 1 is high level, Φ 2 during for low level, switching tube S1 and S4 conducting, switching tube S2 and S3 turn-off, input voltage V
INCharge to V for capacitor C 0
INWhen Φ 2 is a high level, Φ 1 during for low level, switching tube S2 and S3 conducting, switching tube S1 and S3 turn-off, and this moment, the bottom crown voltage of capacitor C 0 was V
IN, according to the voltage at the electric capacity two ends principle of can not suddenling change, the voltage of the top crown of capacitor C 0 by multiplication of voltage to 2V
IN, capacitor C 1 is charged, after several cycles like this, output voltage finally by multiplication of voltage to 2V
IN, that is: V
Out=2V
INObtain higher voltage gain, can promote circuit by this electric charge of cascade, output voltage at the corresponding levels input voltage as subordinate.In theory, the output voltage of N level charge pump lifting is (N+1) V
IN
By top operation principle as can be seen, because when powering on, capacitor C 0 and C1 do not have stored charge, when Φ 1 be high level, when Φ 2 is low level, switching tube M1 and M4 conducting, input voltage V
INGive capacitor C 0 charging, because this moment, switching tube was operated in linear zone, its channel resistance is very little, so input voltage V
INThe electric current of charging for capacitor C 0 will be very big, so easy damage circuit.So, need in charge pump circuit, add soft starting circuit in order to prevent the peak current between the starting period.
Propose a kind of soft starting circuit in the prior art, be applied to charge pump circuit, comprised current source and control switch; Described current source is connected between driver module and the ground; Described driver module is used for the grid of driving switch pipe; Described control switch is connected in parallel on described current source two ends; When the charge pump soft start, described control switch disconnects, and the grid of described switching tube is by the current discharge of described driver module with described current source; After described charge pump soft start finishes, described control switch closure, the grid of described switching tube is by described driver module and described control switch ground connection.
But described soft starting circuit of the prior art needs current source accurately, and needs a plurality of current sources, realizes comparatively complicated.On the other hand, existing soft starting circuit still exist in the one-period grid voltage with switching tube be discharged to zero may, according to the drain current formula:
Also can produce bigger surge current, influence the effect of soft start.
Summary of the invention
The utility model embodiment provides a kind of switching capacity charge pump with soft starting circuit, this charge pump comprises switching tube grid electrode drive module, multiplication of voltage charge pump module, this charge pump also comprises: switching tube grid low level hoisting module, switch control module, wherein
Switching tube grid low level hoisting module is used for providing the gate voltage values of the required multiplication of voltage charge pump module switching tube of soft start;
Switch control module is used for that selector switch tube grid low level hoisting module links to each other with multiplication of voltage charge pump module when soft start; After soft start finished, selector switch tube grid driver module linked to each other with multiplication of voltage charge pump module.
Described switch control module comprises four K switch 1, K2, K3, K4, wherein said four switches are threephase switch, first port of K switch 1, K3, K4 all connects the output voltage of described grid low level hoisting module, and first port of K switch 2 connects supply voltage; Second port of K switch 1, K2, K3, K4 all is connected in the output of described switching tube grid electrode drive module, and the 3rd port all is connected in described multiplication of voltage charge pump module.
Described switching tube grid low level hoisting module comprises supply voltage, resistance R 0, resistance R 1 and ground end, wherein, resistance R 0 and resistance R 1 are series between supply voltage and the ground end, and the common port of resistance R 0 and resistance R 1 is exported the output voltage of described switching tube grid low level hoisting module.
Described switching tube grid low level hoisting module also comprises a K switch 5, and this K switch 5 is series in the series arm of being made up of supply voltage, resistance R 0 and resistance R 1 and ground end.
Described switching tube grid low level hoisting module comprise supply voltage, resistance R 0, resistance R 1, hold and amplifier OP, wherein, resistance R 0 and resistance R 1 are series between supply voltage and the ground end, the common port of resistance R 0 and resistance R 1 links to each other with the positive input of amplifier OP, the output of described amplifier OP links to each other with the negative input of this amplifier OP, is exported the output voltage of this switching tube grid low level hoisting module by the output of described amplifier OP.
Described switching tube grid low level hoisting module also comprises a K switch 6, and this K switch 6 is series in the series arm of being made up of supply voltage, resistance R 0 and resistance R 1 and ground end.
Pass through to promote the switching tube grid voltage in the multiplication of voltage charge pump module among the utility model embodiment, thereby reduce the electric current that flows through on the switching tube, avoided flowing through when starting the peak current of device, realized the soft start of circuit by simple circuit.And after soft start was finished, the soft start switch control module was connected to normal charge pump driver module with the switching tube gate drive signal in the charge pump, realized driving normally.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of multiplication of voltage charge pump in the utility model prior art;
Fig. 2 is the structural representation that has the charge pump of soft starting circuit in the utility model embodiment;
Fig. 3 (a) is a kind of particular circuit configurations figure of switching tube grid low level hoisting module in the utility model embodiment;
Fig. 3 (b) is a kind of particular circuit configurations figure of switching tube grid low level hoisting module in the utility model embodiment;
Fig. 3 (c) is a kind of particular circuit configurations figure of switching tube grid low level hoisting module in the utility model embodiment;
Fig. 3 (d) is a kind of particular circuit configurations figure in the switching tube grid low level hoisting module in the utility model embodiment;
Fig. 4 is the particular circuit configurations figure of switch control module in the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Be illustrated in figure 2 as the structural representation that has the charge pump of soft starting circuit in the utility model embodiment, this charge pump construction comprises switching tube grid low level hoisting module 100, switching tube grid electrode drive module 101, switch control module 102, multiplication of voltage charge pump module 103; Wherein, described existing charge pump circuit comprises switching tube grid electrode drive module 101 and multiplication of voltage charge pump module 103, the utility model embodiment has increased switching tube grid low level hoisting module 100 and switch control module 102 on described existing charge pump circuit basis, in the soft start stage, by switch control module 102 controls, make switching tube grid low level hoisting module 100 places in circuit, drive multiplication of voltage charge pump module 103, after soft start finishes, control by switch control module 102, make driver module change switching tube grid electrode drive module 101 into, thereby enter the normal charge pump multiplication of voltage course of work by switching tube grid low level hoisting module 100.
Be depicted as a kind of particular circuit configurations figure of switching tube grid low level hoisting module 100 in the utility model embodiment as Fig. 3 (a), this structure comprises supply voltage V
IN, resistance R 0, resistance R 1, wherein, resistance R 0 and R1 are series at supply voltage V
INAnd between the ground end, dividing potential drop obtains voltage V
DIV, adopt this voltage V
DIVRemove to control the switching tube grid of described multiplication of voltage charge pump module 103.
As Fig. 3 (b) as described on the basis of Fig. 3 (a), increased by an amplifier OP, the voltage V of described Fig. 3 (a) output
DIVInput to the positive input of amplifier OP, the output V of amplifier OP
oLink to each other with its negative input end, make the output voltage of amplifier OP follow its forward input voltage V
DIV, and the output voltage V shown in Fig. 3 (a) is compared in the output behind amplifier OP
DIVHas stronger driving force.
Fig. 3 (c) is depicted as a kind of particular circuit configurations of switching tube grid low level hoisting module 100 in the utility model embodiment, described circuit structure has increased by a K switch 5 on the basis of Fig. 3 (a), be series between resistance R 1 and the ground end, when soft start, K switch 5 closures, after soft start finished, K switch 5 disconnected, described soft start branch road is disconnected, thereby avoided the power loss of soft start branch road when non operating state.
Same reason, circuit structure shown in Fig. 3 (d) are to have increased K switch 6 on the basis of circuit shown in Fig. 3 (b), disconnect thereby make soft start finish back K switch 6, avoid the power loss of soft start branch road when non operating state.
It should be noted that, K switch 5 is not limited to and is series between resistance R 1 and the ground end, as long as being series in the series arm that described supply voltage, resistance R 0 and R1 and ground end form, it all can, can both play closure when soft start, make this series arm in running order, soft start finishes the back and disconnects, the function that this series arm is disconnected.Equally, K switch 6 also can be series in the series arm on described supply voltage, resistance R 0, resistance R 1 and ground Anywhere, and closure makes this series arm closure when soft start as long as satisfy, and soft start finishes the back and disconnects, and this series arm is disconnected get final product.
In addition, because resistance R 0 adopts the mode of series connection dividing potential drop to be connected with resistance R 1, therefore, among Fig. 3 (a) and (b), (c), (d), all can obtain different voltage V by regulating the proportionate relationship of resistance R 0 and resistance R 1
oOutput valve, both can carry out in various degree lifting, thereby the electric current of switching tube is flow through in influence to the grid low level of switching tube in the multiplication of voltage charge pump circuit.
Figure 4 shows that the particular circuit configurations figure of switch control module 102 in the utility model embodiment, this unit comprises four K switch 1, K2, K3 and K4, described four switches are threephase switch, first port of K switch 1, K3, K4 all connects the output voltage of described grid low level hoisting module, and first port of K switch 2 connects supply voltage; Second port of K switch 1, K2, K3, K4 all is connected in the output of described switching tube grid electrode drive module, and the 3rd port is connected in four switching tube M1, M2, grid SG1, the SG2 of M3, M4, SG3, the SG4 of described multiplication of voltage charge pump module successively.By described four K switch 1, K2, K3, K4, select the output of the output of described switching tube grid low level hoisting module 100 or described switching tube grid electrode drive module 101 to control the grid voltage of four switching tubes of described multiplication of voltage charge pump module 103.
Number that it should be noted that described switch is not limited to as shown in Figure 4 four, and the number of described switch depends on the number of switching tube in the multiplication of voltage charge pump module.
Below be example with circuit structure in conjunction with Fig. 1, Fig. 2, Fig. 3 (b) and Fig. 4, the soft start-up process of the described switching capacity charge pump of the utility model embodiment is described in detail.
When circuit start, at first select described switching tube grid low level hoisting module 100 driver elements as described multiplication of voltage charge pump module 103 by described switch control module 102, dial to V the selecting side of promptly described K switch 1, K2, K3, K4
oAnd V
IN, make grid SG1, SG2, SG3, SG4 input voltage V respectively
o, V
IN, V
o, V
oAt this moment, switching tube M1, M3, M4 conducting in the described multiplication of voltage charge pump module 103, switching tube M2 ends.Input voltage V then
INDirectly be communicated with input voltage V with output
INDirectly capacitor C 0 and C1 are charged.Channel current formula according to the PMOS pipe:
Or
By formula (1) and formula (2) as can be known, by reducing gate source voltage V
SGValue can reduce to flow through the electric current of metal-oxide-semiconductor, the gate voltage that promptly promotes metal-oxide-semiconductor can reduce to flow through the electric current of metal-oxide-semiconductor.According to the description of Fig. 3 as can be known:
Or
By above-mentioned formula (3) and formula (4) as can be known, the lifting of switching tube grid level has diminished the electric current that flows through metal-oxide-semiconductor, has avoided the peak current of soft start state.After soft start is finished, select the driver element of described switching tube grid electrode drive module 101 by switch control module 102 as described multiplication of voltage charge pump module 103, be that four outputs to described switching tube grid electrode drive module 101 are dialled in the selecting side of described K switch 1, K2, K3, K4, make described multiplication of voltage charge pump module carry out work by common drive pattern.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than the utility model embodiment is described in detail, used embodiment herein the utility model set forth, the explanation of above embodiment just is used for help understanding method and apparatus of the present utility model; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (6)
1. switching capacity charge pump with soft starting circuit, this charge pump comprises switching tube grid electrode drive module, multiplication of voltage charge pump module, it is characterized in that this charge pump also comprises: switching tube grid low level hoisting module, switch control module, wherein,
Switching tube grid low level hoisting module is used for providing the gate voltage values of the required multiplication of voltage charge pump module switching tube of soft start;
Switch control module is used for that selector switch tube grid low level hoisting module links to each other with multiplication of voltage charge pump module when soft start; After soft start finished, selector switch tube grid driver module linked to each other with multiplication of voltage charge pump module.
2. charge pump according to claim 1, it is characterized in that, described switch control module comprises four K switch 1, K2, K3, K4, wherein said four switches are threephase switch, first port of K switch 1, K3, K4 all connects the output voltage of described grid low level hoisting module, and first port of K switch 2 connects supply voltage; Second port of K switch 1, K2, K3, K4 all is connected in the output of described switching tube grid electrode drive module, and the 3rd port all is connected in described multiplication of voltage charge pump module.
3. charge pump according to claim 1, it is characterized in that, described switching tube grid low level hoisting module comprises supply voltage, resistance R 0, resistance R 1 and ground end, wherein, resistance R 0 and resistance R 1 are series between supply voltage and the ground end, and the common port of resistance R 0 and resistance R 1 is exported the output voltage of described switching tube grid low level hoisting module.
4. charge pump according to claim 3 is characterized in that, described switching tube grid low level hoisting module also comprises a K switch 5, and this K switch 5 is series in the series arm of being made up of supply voltage, resistance R 0 and resistance R 1 and ground end.
5. charge pump according to claim 1, it is characterized in that, described switching tube grid low level hoisting module comprise supply voltage, resistance R 0, resistance R 1, hold and amplifier OP, wherein, resistance R 0 and resistance R 1 are series between supply voltage and the ground end, the common port of resistance R 0 and resistance R 1 links to each other with the positive input of amplifier OP, the output of described amplifier OP links to each other with the negative input of this amplifier OP, is exported the output voltage of this switching tube grid low level hoisting module by the output of described amplifier OP.
6. charge pump according to claim 5 is characterized in that, described switching tube grid low level hoisting module also comprises a K switch 6, and this K switch 6 is series in the series arm of being made up of supply voltage, resistance R 0 and resistance R 1 and ground end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200517823U CN202004641U (en) | 2011-03-01 | 2011-03-01 | Switched capacitance charge pump with soft-start circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200517823U CN202004641U (en) | 2011-03-01 | 2011-03-01 | Switched capacitance charge pump with soft-start circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004641U true CN202004641U (en) | 2011-10-05 |
Family
ID=44707367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200517823U Expired - Fee Related CN202004641U (en) | 2011-03-01 | 2011-03-01 | Switched capacitance charge pump with soft-start circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202004641U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651082A (en) * | 2012-04-09 | 2012-08-29 | 卓捷创芯科技（深圳）有限公司 | Bandgap reference self-starting circuit and passive radio frequency identification label |
| CN107465339A (en) * | 2016-06-03 | 2017-12-12 | 英特矽尔美国有限公司 | The method and circuit of soft-startup large power charge pump |
| CN107479615A (en) * | 2017-08-28 | 2017-12-15 | 武汉铂芯半导体有限公司 | A kind of method for accelerating stabilized power source output voltage |
| CN109613326A (en) * | 2018-12-18 | 2019-04-12 | 上海南芯半导体科技有限公司 | A kind of input over-voltage detection circuit that can work independently and its implementation |
| CN113489302A (en) * | 2021-08-10 | 2021-10-08 | 无锡靖芯科技有限公司 | Soft start circuit of charge pump |
| CN113595383A (en) * | 2020-04-30 | 2021-11-02 | 华为技术有限公司 | Switched capacitor circuit, charging control system and terminal equipment |
-
2011
- 2011-03-01 CN CN2011200517823U patent/CN202004641U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651082A (en) * | 2012-04-09 | 2012-08-29 | 卓捷创芯科技（深圳）有限公司 | Bandgap reference self-starting circuit and passive radio frequency identification label |
| CN102651082B (en) * | 2012-04-09 | 2014-08-20 | 卓捷创芯科技（深圳）有限公司 | Bandgap reference self-starting circuit and passive radio frequency identification label |
| CN107465339A (en) * | 2016-06-03 | 2017-12-12 | 英特矽尔美国有限公司 | The method and circuit of soft-startup large power charge pump |
| CN107465339B (en) * | 2016-06-03 | 2022-03-29 | 英特矽尔美国有限公司 | Method and circuit for soft starting high-power charge pump |
| TWI769160B (en) * | 2016-06-03 | 2022-07-01 | 美商英特矽爾美國有限公司 | Method, circuitry, and electronic system to soft start high power charge pumps |
| CN107479615A (en) * | 2017-08-28 | 2017-12-15 | 武汉铂芯半导体有限公司 | A kind of method for accelerating stabilized power source output voltage |
| CN107479615B (en) * | 2017-08-28 | 2019-04-30 | 武汉铂芯半导体有限公司 | A method of accelerating stabilized power supply output voltage |
| CN109613326A (en) * | 2018-12-18 | 2019-04-12 | 上海南芯半导体科技有限公司 | A kind of input over-voltage detection circuit that can work independently and its implementation |
| CN113595383A (en) * | 2020-04-30 | 2021-11-02 | 华为技术有限公司 | Switched capacitor circuit, charging control system and terminal equipment |
| CN113489302A (en) * | 2021-08-10 | 2021-10-08 | 无锡靖芯科技有限公司 | Soft start circuit of charge pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202004641U (en) | Switched capacitance charge pump with soft-start circuit | |
| TWI499161B (en) | A balanced charging circuit for series power storage units | |
| CN102983744B (en) | DC/DC module for LCD driving circuit | |
| CN108923643B (en) | Reconfigurable boost charge pump without threshold voltage loss | |
| CN101902059B (en) | Method for capacitive load charging | |
| CN102290992B (en) | DC-DC boost converter circuit and method for driving the same | |
| CN103607006A (en) | A charging and discharging reuse circuit | |
| CN107623440A (en) | Voltage conversion circuit and power supply switch circuit | |
| CN102629822A (en) | Charge pump and liquid crystal display screen driving chip | |
| CN101924465B (en) | Charge pump circuit for realizing multi-mode voltage gain and realizing method thereof | |
| CN201726313U (en) | Voltage-boosting circuit and liquid crystal driving circuit with the same | |
| US9236797B2 (en) | Buck-store and boost-restore converter | |
| CN103378616A (en) | Lithium battery power supply management circuit | |
| CN203933146U (en) | Electric power switching circuit for solar energy and the shared electric supply installation of net electricity | |
| CN102354483A (en) | LED (Light Emitting Diode) backlight-source boosting driving circuit, LED backlight source and liquid crystal display device | |
| CN100539369C (en) | Drive circuit | |
| CN203645360U (en) | A charging and discharging multiplex circuit | |
| CN201418178Y (en) | A LED constant-current drive apparatus | |
| CN208834723U (en) | Multi-channel LED backlight drive circuit and LCD TV | |
| CN103762868A (en) | High-power factor active valley-fill type alternating current and direct current converter | |
| CN100480791C (en) | LCD boosted circuit | |
| CN103532382A (en) | Switching power supply circuit | |
| CN204031528U (en) | A kind of energy-conservation driving circuit of high-power LED lamp | |
| CN103531147B (en) | LED drive circuit and use the LED drive system of this driving circuit | |
| CN102916470A (en) | Battery energy transfer circuit for transferring energy between batteries connected in series |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20180301 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |