CN203434861U - Charge pump circuit with leakage protection function - Google Patents
Charge pump circuit with leakage protection function Download PDFInfo
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- CN203434861U CN203434861U CN201320555610.9U CN201320555610U CN203434861U CN 203434861 U CN203434861 U CN 203434861U CN 201320555610 U CN201320555610 U CN 201320555610U CN 203434861 U CN203434861 U CN 203434861U
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- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Y02T10/642—
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- Control Of Eletrric Generators (AREA)
- Dc-Dc Converters (AREA)
- Control Of Charge By Means Of Generators (AREA)
- Electromechanical Clocks (AREA)
Abstract
A charge pump circuit with leakage protection function comprises a voltage doubling circuit unit for receiving a voltage stabilizing signal and a voltage doubling control signal for maintaining the voltage doubling circuit unit to output a stable voltage doubling signal; and a switch control unit, it includes the first switch unit and a second switch unit, in order to receive a switch control signal, the first switch unit opens when the switch control signal is the low potential, let the voltage doubling of the voltage doubling circuit unit export and start the power assembly to turn on, make the working circuit form the loop, the switch control signal closes the second switch unit at the same time, make it not respond; when the switch control signal is at a high potential, the voltage-multiplying signal output of the voltage-multiplying circuit unit is still continuous, the first switch unit is closed, so that the voltage-multiplying signal output of the voltage-multiplying circuit unit cannot pass through, the power assembly is not conducted, and meanwhile, the second switch unit is opened, so that the residual electric quantity of the power assembly can be released to the ground.
Description
Technical field
The present invention relates to a kind of electric charge pump circuit with creepage protection function; be widely used in various automobile current generator; in order to avoid voltage-multiplying circuit electric leakage; cause undertension; make (PCC) power conducting resistance large; the electric current of flowing through produces consumed power and strengthens, so that (PCC) power may be because of overheated reduction of service life.
Background technology
Automobile current generator system works circuit, it is mainly comprised of voltage regulator, generator amature, stator coil, a rectifier bridge (D1-D6), power transistor and battery.During car engine, by internal combustion engine belt, drive generator operation, exciting curent flows into the generator amature in rotating simultaneously, and generation magnetic field, the stator of generator is responded to this magnetic field and is produced alternating current, alternating current is converted to direct current output through rectifier bridge, and this output, to battery charging, provides automotive electronics device need for electricity.
Consult Fig. 1, generator system operating circuit for B system, being mainly used in U.S.A is automobile current generator, its feature is that rotor 1 exciting curent is first after power transistor 3 by battery anode 2, again through rotor 1 to battery negative terminal, be compared on generator, rotor 1 exciting curent is that two carbon brush by generator flow out respectively, rotor 1 exciting curent is flowed into by the Field end of carbon brush, through rotor 1, from earth terminal, flows out.
Because the source terminal of power transistor 3 (source) has connect rotor 1, in generator circuit, the voltage of rotor 1 end has 12V at least, so if make power transistor 3 work, gate (GATE) terminal voltage need be greater than source electrode (SOURCE) end (namely rotor-end) voltage again, so need voltage-multiplying circuit gate (GATE) terminal voltage that raises for charge pump, power transistor 3 can be worked.
Consulting Fig. 2 to Fig. 4, is the electric charge pump circuit of existing automobile current generator, and in order to be connected in the operating circuit 4 of generator, it includes a voltage-multiplying circuit unit 5 and a switch control unit 6.Voltage-multiplying circuit unit 5 is by resistance R 1, R2, diode D1, D2, and capacitor C 1, power transistor Q5, Q6 and input signal processing components Level Shift form; Switch control unit 6 is comprised of power transistor Q4 and Zener diode ZD1.
Voltage-multiplying circuit unit 5 is in order to receive a burning voltage signal 7 from battery voltage and a multiplication of voltage control signal 8 from voltage regulator, the pulse wave signal that multiplication of voltage control signal 8 is fixed frequency, its waveform as shown in Figure 4, when pulse wave that multiplication of voltage control signal 8 is stabilized frequency, multiplication of voltage control signal 8 maintains the stable multiplication of voltage signal output 9 in voltage-multiplying circuit unit 5, waveform as shown in Figure 5.
Switch control unit 6 receives multiplication of voltage signal output 9 and one switch controlling signal 10 from voltage regulator of voltage-multiplying circuit unit 5, waveform as shown in Figure 6.
When switch controlling signal 10 is electronegative potential, by dragging down the voltage of multiplication of voltage signal output 9, power transistor Q4 is closed, the multiplication of voltage signal output 9 of voltage-multiplying circuit unit 5 is high potential, opens power transistor Q1.
When switch controlling signal 10 is high potential, open power transistor Q4, the multiplication of voltage signal output 9 that makes voltage-multiplying circuit unit 5 is electronegative potential, close power transistor Q1, and power transistor Q1 residual charge is released over the ground, the part electric charge that also can make the capacitor C 1 in voltage-multiplying circuit unit 5 store up bleeds off simultaneously, originally voltage-multiplying circuit unit 5 is leaked electricity because there being pair earth-return, therefore when the each transition of switch controlling signal 10 is electronegative potential, the initial voltage of multiplication of voltage signal output 9 is not enough, as Fig. 5 encloses part, to cause power transistor Q1 conducting resistance large, current flowing causes the power that increases consumption, make power transistor Q1 temperature increase, reduction of service life.
Summary of the invention
Main purpose of the present invention is to provide a kind of electric charge pump circuit with creepage protection function; in order to avoid voltage-multiplying circuit electric leakage, cause undertension, make (PCC) power conducting resistance large; the electric current of flowing through produces consumed power and strengthens, so that (PCC) power is because of the object of overheated shortening in useful life.
In order to achieve the above object, the invention discloses a kind of charge pump (Charge pump) circuit with creepage protection function, include a voltage-multiplying circuit unit and a switch control unit.Voltage-multiplying circuit unit wherein, in order to receive a burning voltage signal V (BAT) and a multiplication of voltage control signal, this multiplication of voltage control signal is in order to maintain the stable multiplication of voltage signal output in voltage-multiplying circuit unit; Switch control unit, it includes the first switch element and a second switch unit, in order to receive a switch controlling signal, when this switch controlling signal is electronegative potential (low), this first switch element is opened, and allows the multiplication of voltage of this voltage-multiplying circuit unit export the conducting of starting power assembly, makes this operating circuit form loop, this switch controlling signal is closed this second switch unit simultaneously, and it is not responded; When this switch controlling signal is high potential (high), the multiplication of voltage signal output of this voltage-multiplying circuit unit still continues, this first switch element is closed, the multiplication of voltage signal output of this voltage-multiplying circuit unit can not be passed through, this i.e. not conducting of (PCC) power, this second switch unit is opened simultaneously, and the residual electric weight of this (PCC) power can be released over the ground.
As mentioned above, electric charge pump circuit has creepage protection function, can avoid power transistor electric conduction resistive large, and the electric current of flowing through produces consumed power and strengthens, so that it is because of overheated reduction of service life.
Above-mentioned and other object, advantage and characteristic of the present invention are by the detailed description of following preferred embodiments and more in depth understand with reference to graphic being able to.
Accompanying drawing explanation
Fig. 1 is the generator system operating circuit of B system;
Fig. 2 is the working circuit diagram of existing charge pump;
Fig. 3 is the work calcspar of existing charge pump;
Fig. 4 is the oscillogram of the multiplication of voltage control signal in Fig. 3;
Fig. 5 is the oscillogram of the multiplication of voltage signal output in Fig. 3;
Fig. 6 is the oscillogram of the switch controlling signal in Fig. 3;
Fig. 7 is charge pump (Charge pump) circuit diagram that the present invention has creepage protection function;
Fig. 8 is the work calcspar in Fig. 7;
Fig. 9 is the oscillogram of the multiplication of voltage control signal of the fixed frequency in Fig. 8;
Figure 10 is the oscillogram of the multiplication of voltage signal output in Fig. 8;
Figure 11 is the oscillogram of the switch controlling signal in Fig. 8;
Figure 12 is the oscillogram of the multiplication of voltage control signal of the variation frequency in Fig. 8;
Figure 13 is the oscillogram of the multiplication of voltage control signal output in Figure 11;
Figure 14 is the oscillogram of the switch controlling signal in Figure 11.
Drawing reference numeral explanation:
In 20 operating circuits
22 storage batterys
24 (PCC) powers
26 rotors
30 voltage-multiplying circuit unit
32 switch control units
34 burning voltage signals
36 multiplication of voltage control signals
38 multiplication of voltage signals
40 resistance R 1
42 resistance R 2
44 diode D1
46 diode D2
48 capacitor C 1
50 power transistor Q5
52 power transistor Q6
54 input signal processor Level Shift
56 first switch elements
58 second switch unit
60 switch controlling signals
61 multiplication of voltage control signal processing units
62 power transistor Q4
64 Zener diode ZD1
Embodiment
Preferred embodiment the invention will be further described to contrast accompanying drawing combination below.
Consult Fig. 7 and Fig. 8; the present invention has charge pump (Charge pump) circuit of creepage protection function; in order to protect in the operating circuit of generator 20 (PCC) power 24; this operating circuit 20 includes storage battery 22, (PCC) power 24 and rotor 26, and this electric charge pump circuit includes a voltage-multiplying circuit unit 30 and a switch control unit 32.
Voltage-multiplying circuit unit 30, in order to receive a burning voltage signal V (BAT) 34 and a multiplication of voltage control signal 36, multiplication of voltage control signal 36 is in order to maintain 38 outputs of the stable multiplication of voltage signal in voltage-multiplying circuit unit 30; Wherein this burning voltage signal 34 is battery tension, and multiplication of voltage control signal is 36 to be the pulse wave signal of fixed frequency, and as shown in Figure 9, multiplication of voltage signal 38 as shown in figure 10.Voltage-multiplying circuit unit 30 is comprised of resistance R 140, resistance R 242, diode D144, diode D246, capacitor C 148, power transistor Q550, power transistor Q652 and input signal processor Level Shift54.
One switch control unit 32, comprise the first switch element 56 and a second switch unit 58, in order to receive a switch controlling signal 60, wherein Figure 11 is the waveform of switch controlling signal 60, and when switch controlling signal 60 is electronegative potential (low), the first switch element 56 is opened, allow the multiplication of voltage signal 38 of voltage-multiplying circuit unit 30 export 24 conductings of starting power assembly, make operating circuit 1 form loop, Simultaneous Switching control signal 60 is closed second switch unit 58, and it is not responded; When switch controlling signal 60 is high potential (high), multiplication of voltage signal 38 outputs of voltage-multiplying circuit unit 32 still continue, the first switch element 56 is closed, multiplication of voltage signal 38 outputs of voltage-multiplying circuit unit 30 can not be passed through, (PCC) power 24 i.e. not conductings, second switch unit 58 is opened simultaneously, and the residual electric weight of (PCC) power 24 can be released over the ground.Wherein switch control unit 32 is comprised of power transistor Q462 and Zener diode ZD164.
In a preferred embodiment, charge pump (Charge pump) circuit that the present invention has creepage protection function also includes a multiplication of voltage control signal processing unit 61, in order to receive multiplication of voltage control signal 36 and switch controlling signal 60 simultaneously, make multiplication of voltage control signal 36 can be the pulse wave signal of variation frequency, as shown in figure 12, consult the switch controlling signal of Figure 14, when switch controlling signal 60 is electronegative potential (low), the frequency of multiplication of voltage control signal is high, to guarantee having enough charge pump output, as shown in figure 13; When switch controlling signal 60 is high potential (high), the frequency of multiplication of voltage control signal is low, can suitably reduce the operating current of circuit, reduces power loss, and charge pump is not exported.
As mentioned above, electric charge pump circuit has creepage protection function, can avoid power transistor 24 electric conduction resistives large, and the electric current of flowing through produces consumed power and strengthens, so that it is because of overheated reduction of service life.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, can also make some being equal to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. an electric charge pump circuit with creepage protection function, in order to protect the (PCC) power in the operating circuit of generator, this operating circuit includes storage battery, (PCC) power and rotor, it is characterized in that, and this electric charge pump circuit includes:
One voltage-multiplying circuit unit, in order to receive a burning voltage signal and a multiplication of voltage control signal, this multiplication of voltage control signal is in order to maintain the stable multiplication of voltage signal output in voltage-multiplying circuit unit; And
One switch control unit, it includes the first switch element and a second switch unit, in order to receive a switch controlling signal, when this switch controlling signal is electronegative potential, this first switch element is opened, and allows the multiplication of voltage signal of this voltage-multiplying circuit unit export the conducting of starting power assembly, makes this operating circuit form loop, this switch controlling signal is closed this second switch unit simultaneously, and it is not responded; When this switch controlling signal is high potential, the multiplication of voltage signal output of this voltage-multiplying circuit unit still continues, this first switch element is closed, the multiplication of voltage signal output of this voltage-multiplying circuit unit can not be passed through, this i.e. not conducting of (PCC) power, this second switch unit is opened simultaneously, and the residual electric weight of this (PCC) power can be released over the ground.
2. the electric charge pump circuit with creepage protection function as claimed in claim 1, is characterized in that, this burning voltage signal is battery tension.
3. the electric charge pump circuit with creepage protection function as claimed in claim 1, is characterized in that, the pulse wave signal that this multiplication of voltage control signal is fixed frequency.
4. the electric charge pump circuit with creepage protection function as claimed in claim 1, it is characterized in that, this electric charge pump circuit also includes a multiplication of voltage control signal processing unit, in order to receive multiplication of voltage control signal and switch controlling signal simultaneously, make this multiplication of voltage control signal can be the pulse wave signal of variation frequency, when switch controlling signal is electronegative potential, the frequency of pulse wave signal is high, to guarantee having enough charge pump output; When switch controlling signal is high potential, the frequency of pulse wave signal is low, reduces the operating current of operating circuit, reduces power loss.
5. the electric charge pump circuit with creepage protection function as claimed in claim 1, is characterized in that, this voltage-multiplying circuit unit comprises a plurality of resistance, diode, electric capacity and power transistor.
6. the electric charge pump circuit with creepage protection function as claimed in claim 1, is characterized in that, this switch control unit comprises one or a plurality of power transistor, diode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101223618 | 2012-12-06 | ||
| TW101223618U TWM462685U (en) | 2012-12-06 | 2012-12-06 | Charge pump circuit with leakage breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203434861U true CN203434861U (en) | 2014-02-12 |
Family
ID=49771860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320555610.9U Expired - Lifetime CN203434861U (en) | 2012-12-06 | 2013-09-06 | Charge pump circuit with leakage protection function |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203434861U (en) |
| TW (1) | TWM462685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019196064A1 (en) * | 2018-04-12 | 2019-10-17 | 深圳市汇顶科技股份有限公司 | Charge pump circuit and control method therefor |
-
2012
- 2012-12-06 TW TW101223618U patent/TWM462685U/en not_active IP Right Cessation
-
2013
- 2013-09-06 CN CN201320555610.9U patent/CN203434861U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019196064A1 (en) * | 2018-04-12 | 2019-10-17 | 深圳市汇顶科技股份有限公司 | Charge pump circuit and control method therefor |
| US10615688B2 (en) | 2018-04-12 | 2020-04-07 | Shenzhen GOODIX Technology Co., Ltd. | Charge pump circuit and controlling method thereof |
| US10727739B2 (en) | 2018-04-12 | 2020-07-28 | Shenzhen GOODIX Technology Co., Ltd. | Charge pump circuit and controlling method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM462685U (en) | 2013-10-01 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140212 |
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| CX01 | Expiry of patent term |