CN106300967B - Driving circuit according to capacitor charge and discharge toggle switch - Google Patents
Driving circuit according to capacitor charge and discharge toggle switch Download PDFInfo
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- CN106300967B CN106300967B CN201510237013.5A CN201510237013A CN106300967B CN 106300967 B CN106300967 B CN 106300967B CN 201510237013 A CN201510237013 A CN 201510237013A CN 106300967 B CN106300967 B CN 106300967B
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Abstract
A kind of driving circuit according to capacitor charge and discharge toggle switch, to drive a load circuit under a continuous conduction mode (CCM), load circuit includes a load resistance and a first switch, in above-mentioned driving circuit, first current output module is electrically connected at load resistance, to according to one time-dependent current of load resistance voltage output.Second current output module is electrically connected at first switch and the first current output module, and to export a constant current.First capacitance is electrically connected at second switch.Second switch is electrically connected at the first capacitance and second switch.Processing module is electrically connected at the grid of the first capacitance, the second capacitance and first switch and second switch, to according to the voltage of the size of time-dependent current and constant current, the first capacitance and the second capacitance control conducting one of first switch and second switch.
Description
Technical field
The present invention relates to a kind of driving circuits according to capacitor charge and discharge toggle switch, more particularly to one kind continuously to lead
Under logical pattern, the drive of the foundation capacitor charge and discharge toggle switch of average current is controlled according to capacitor charge and discharge toggle switch
Dynamic circuit.
Background technology
Referring to Fig. 1, Fig. 1 shows the circuit diagram of the LED integral circuit of the prior art, as shown in Figure 1,
Existing LED integral circuit PA1 includes a load circuit PA11 and one drive circuit PA12, load circuit PA11
For circuit of LED, and include a voltage source PA111, a whole bridge rectifier circuit PA112, a resistance PA113, one or two poles
Pipe PA114, an a capacitance PA115, at least LED P A116, an inductance PA117, a first switch PA118, a resistance
PA119, a capacitance PA120 and a capacitance PA121.
Whole bridge rectifier circuit PA112 is coupled to voltage source PA111, and is coupled to resistance PA113, diode PA114, electricity
Hold PA115 and LED P A116, and one end of inductance PA117 is coupled to diode PA114 and first switch PA118's
Drain electrode, the other end are then coupled to capacitance PA115 and LED P A116.Resistance PA119 is then coupled to first switch PA118
Source electrode, and be coupled to the ends CS of driving circuit PA12.Capacitance PA120 is coupled to resistance PA113, and is coupled to driving circuit
The ends VCC of PA12, capacitance PA121 is then coupled to the ends COMP of driving circuit PA12, and first switch PA118 is coupled to driving electricity
The OUT terminal of road PA12.
Wherein, when first switch PA118 is connected, LED P A116 will produce an average current Ia, inductance
PA117 will produce an inductive current Ib, and in general, the operation mode of load circuit PA11 is connected by first switch PA118
Time (rise and fall of control inductive current Ib, and the average i.e. finger average current Ia of the cutting edge of a knife or a sword value of rise and fall) determined,
Furthermore, it is understood that above-mentioned operation mode mainly has continuous current conduction mode (CCM).
However, above-mentioned operation mode respectively has advantage and disadvantage, wherein for continuous current conduction mode, although input and
Output current ripple (ripple) comes small compared to discontinuous conduction mode (DCM), total harmonic distortion (Total Harmonic
Distortion, THD) and electromagnetic interference (Electro Magnetic Interference, EMI) it is small, filtering readily it is excellent
Point, but existing load circuit PA11 is limited to the design of circuit framework, and average current Ia can not be made to be stably driven with luminous two
Pole pipe PA116 and the problem of be easy to cause the photo-labile that LED P A116 is sent out.
For example, due to being continuous conduction mode, inductance PA117 chargings initial current value is different from, and is opened
Time can not determine so that inductive current Ib be when first switch PA118 is connected just it can be seen that, and because to be averaged
Ground exports average current Ia, so the time that first switch PA118 turns off is different from, in order to make the average current of reality output
Ia is initial set, and usually in the prior art, the value rising of inductive current Ib triggers note when encountering the value of average current Ia
Record the time (not closing first switch PA118 at this time), and the value of inductive current Ib be more than the value of average current Ia for a period of time
First switch PA118 is just closed after (generally twice), but this kind of method is only applicable to inductance PA117 and is in linear work, if
When inductance PA117 is in nonlinear operation, when first switch PA118 is connected or when closing, the charge and discharge of inductive current due to
It is nonlinear (such as fast charging and discharging), thus it will not be that the value to be set (such as former is intended to that can cause the average current adjusted out
The value set is 1 ampere, but the average current for being limited to nonlinear operation and adjusting out becomes 0.7 ampere), therefore the prior art
Still there is improved space.
Invention content
In view of the framework of available circuit design is limited to, generally has and adjusted in inductance by being caused when nonlinear operation
The problem of average current gone out is the value of non-former setting.Edge this, it is a kind of according to capacitance charge and discharge present invention is primarily aimed at providing
The driving circuit of voltage changeover switch utilizes the difference and two of time-dependent current and constant current mainly under continuous conduction mode
The voltage swing of a capacitance controls the conducting and closing of switch so that inductive current either linear work or non-linear work
Make, can make the average current that adjustment goes out identical as former setting, to solve the above problem.
Based on above-mentioned purpose, technical way of the present invention, which is to provide, a kind of to be changed according to capacitor charge and discharge crush-cutting
The driving circuit of switch, under a continuous conduction mode (CCM), one average current of control drives a load circuit, load
Circuit includes a load resistance and a first switch, and load resistance one end ground connection, with a load resistance voltage, first opens for one end
Closing has a first switch connecting pin and a second switch connecting pin, the driving circuit according to capacitor charge and discharge toggle switch
Including one first current output module, one second current output module, one first capacitance, a second switch, one second capacitance, one
Constant voltage source module and a processing module.First current output module has one first current output terminal, the output of the first electric current
End is electrically connected at first switch connecting pin, and the first current output module is electrically connected at load resistance, to according to load electricity
Hinder one time-dependent current of voltage output.There is second current output module one second current output terminal, the second current output terminal electrically to connect
It is connected to the first current output terminal of first switch connecting pin and the first current output module, the second current output terminal and to export
One constant current.First capacitance one end is electrically connected at second switch connecting pin, other end ground connection.There is second switch a third to open
Connecting pin and one the 4th switch connecting pin are closed, third switch connecting pin is electrically connected at the first capacitance and is connect with second switch
End.Second capacitance one end is electrically connected at the 4th switch connecting pin, other end ground connection.Constant voltage source module is electrically connected at second
Capacitance and the 4th switch connecting pin, to provide certain voltage, and constant voltage is providing the voltage of the second capacitance.Processing module
Be electrically connected at the grid of the first capacitance, the second capacitance and first switch and second switch, to control conducting first switch with
One of second switch.
Wherein, be connected and closes second switch in processing module control first switch, and when time-dependent current is more than constant current, change
The difference of electric current and constant current generates a charging current, and the first capacitor charging of charging current pair, using makes the first capacitance that will charge
Current storage is an electric power storage stream, and load resistance voltage is gradually increased and time-dependent current is made to reduce gradually；It is less than fixed electricity in time-dependent current
When stream, the first capacitance electric discharge electric power storage stream and generate a discharge current, discharge current is the difference of constant current and time-dependent current, and the
One capacitance is discharged to when keeping one first capacitance voltage of the first capacitance equal with one second capacitance voltage of the second capacitance, at triggering
Reason module closes first switch and second switch is connected, and uses control average current driving load circuit.
Wherein, the preferred embodiment of the attached technological means of the above-mentioned driving circuit according to capacitor charge and discharge toggle switch
In, the first current output module includes a first comparator, a first transistor, a first resistor and a current mirroring circuit,
First comparator has one first compare input terminal, one second compare input terminal and one first compare output end, and first compares
For input terminal for receiving one first reference voltage, first compares output end to according to the first reference voltage output one first reference electricity
Stream.The grid of the first transistor is electrically connected at the first of first comparator and compares output end, and first resistor has a first end
With a second end, first end is electrically connected at the second source electrode for comparing input terminal and the first transistor, and second end is electrically connected at
Load resistance and there is load resistance voltage, use after so that the first transistor and first resistor is received the first reference current, foundation
Load resistance voltage generates time-dependent current.Current mirroring circuit has a connection output end and the first current output terminal, connects output end
It is electrically connected at the drain electrode of the first transistor, and exports time-dependent current, to keep the first current output terminal defeated according to connection output end
Go out time-dependent current.
Wherein, the preferred embodiment of the attached technological means of the above-mentioned driving circuit according to capacitor charge and discharge toggle switch
In, the second current output module includes one second comparator, a second transistor and a second resistance, and the second comparator has
One third compares input terminal, one the 4th compares input terminal and one second compare output end, and third compares input terminal for receiving one
Second reference voltage, second compares output end to according to one second reference current of the second reference voltage output.Second transistor
Grid be electrically connected at second and compare output end, the drain electrode of second transistor is the second current output terminal, and is electrically connected at
First current output terminal, to export constant current according to the second reference current.Second resistance one end is electrically connected at the 4th and compares
The source electrode of input terminal and second transistor, other end ground connection, second resistance is receiving constant current.In addition, the first reference voltage
More than the second reference voltage.
Wherein, the preferred embodiment of the attached technological means of the above-mentioned driving circuit according to capacitor charge and discharge toggle switch
In, constant voltage source module includes a constant current source and a third transistor, and constant current source is electrically connected at the second capacitance and the
4th switch connecting pin of two switches, to provide a stabling current.The source electrode of third transistor is grounded, the grid of third transistor
Pole is electrically connected with the drain in constant current source, is used and is generated constant voltage according to stabling current.In addition, load circuit is one luminous two
Pole pipe circuit, constant voltage are equal with the second capacitance voltage.
After the technical way of the present invention according to the driving circuit of capacitor charge and discharge toggle switch,
Since the voltage swing of difference and two capacitances according to time-dependent current and constant current is to determine whether close the switch of load circuit,
Therefore capacitor charge and discharge can be controlled really and stablize average current, so regardless of being linear work or non-linear work in inductive current
In the state of work, it can all make the average current that adjustment goes out for the value to be set, and then effectively solve problem of the prior art.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Description of the drawings
Fig. 1 shows the circuit diagram of the LED integral circuit of the prior art；
Fig. 2 shows the circuit signal of the driving circuit of the foundation capacitor charge and discharge toggle switch of present pre-ferred embodiments
Figure；And
Fig. 3 shows the waveform diagram of the first switch switching and capacitor charge and discharge of present pre-ferred embodiments.
Wherein, reference numeral
PA1 LED integral circuits
PA11 load circuits
PA111 voltage sources
PA112 whole bridge rectifier circuits
PA113 resistance
PA114 diodes
PA115 capacitances
PA116 light emitting diodes
PA117 inductance
PA118 first switches
PA119 resistance
PA120, PA121 capacitance
PA12 driving circuits
1 driving circuit according to capacitor charge and discharge toggle switch
11 first current output modules
111 first comparators
1111 first compare input terminal
1112 second compare input terminal
1113 first compare output end
112 the first transistors
113 first resistors
1131 first ends
1132 second ends
114 current mirroring circuits
1141 connection output ends with
1142 first current output terminals
12 second current output modules
121 second comparators
1211 thirds compare input terminal
1212 the 4th compare input terminal
1213 second compare output end
122 second transistors
1221 second current output terminals
123 second resistances
13 first capacitances
14 second switches
141 thirds switch connecting pin
142 the 4th switch connecting pins
15 second capacitances
16 constant voltage source modules
161 constant currents
162 third transistor
17 processing modules
21 load resistances
22 first switches
221 first switch connecting pins
222 second switch connecting pins
The first reference currents of Ir1
The second reference currents of Ir2
Ic time-dependent currents
If constant currents
I1 charging currents
I2 discharge currents
Ia average currents
Ib inductive currents
Ix stabling currents
The first reference voltages of V1
The second reference voltages of V2
Vcs load resistance voltages
The first capacitance voltages of Vc1
The second capacitance voltages of Vc2
A, B, C mark point
The section T1, T2
Specific implementation mode
Due in the driving circuit provided by the present invention according to capacitor charge and discharge toggle switch, a combination thereof embodiment
It is too numerous to enumerate, therefore this is no longer going to repeat them, only enumerates a preferred embodiment and is illustrated.
Also referring to Fig. 2 and Fig. 3, Fig. 2 shows the foundation capacitor charge and discharge toggle switch of present pre-ferred embodiments
Driving circuit circuit diagram, Fig. 3 shows first switch switching and the wave of capacitor charge and discharge of present pre-ferred embodiments
Shape schematic diagram.
As shown, the driving circuit 1 of the foundation capacitor charge and discharge toggle switch of present pre-ferred embodiments to
Under one continuous conduction mode (CCM), one average current of control (not shown, with the average current Ia of the first figure) driving, one load electricity
Road (figure does not indicate), load circuit is circuit of LED, but without being limited thereto in other embodiment.
Load circuit includes a load resistance 21 and a first switch 22, and 21 one end of load resistance ground connection, one end has one
Load resistance voltage Vcs, first switch 22 have a first switch connecting pin 221 and a second switch connecting pin 222, and the
One switch 22 that is, Fig. 1 first switch PA118, chat hereby bright.In addition, load circuit also includes as shown in Figure 1
The elements such as voltage source, whole bridge rectifier circuit, resistance, diode, capacitance, light emitting diode, inductance, since this is existing skill
Art, therefore repeat no more.
Driving circuit 1 according to capacitor charge and discharge toggle switch includes one first current output module, 11, one second electricity
Flow output module 12, one first capacitance 13, a second switch 14, one second capacitance 15, at certain voltage source module 16 and one
Manage module 17.
First current output module 11 include a first comparator 111, a first transistor 112, a first resistor 113 with
And a current mirroring circuit 114, first comparator 111 have one first to compare input terminal 1111,1 second to compare input terminal 1112
And one first compare output end 1113, first compares input terminal 1111 for receiving one first reference voltage V1.The first transistor
112 grid is electrically connected at the first of first comparator 111 and compares output end 1113, and first resistor 113 has a first end
1131 and a second end 1132, first end 1131 be electrically connected at the second source for comparing input terminal 1112 and the first transistor 112
Pole, second end 1132 are electrically connected at load resistance 21 and have load resistance voltage Vcs.Current mirroring circuit 114 has one to connect
Output end 1141 and the first current output terminal 1142 are connect, connection output end 1141 is electrically connected at the drain electrode of the first transistor 112.
Second current output module 12 includes one second comparator 121, a second transistor 122 and a second resistance
123, the third that the second comparator 121 has compares input terminal 1211, one the 4th compares input terminal 1212 and one second compare
Output end 1213, third compare input terminal 1211 for receiving one second reference voltage V2.The grid of second transistor 122 electrically connects
It is connected to second and compares output end 1213, the drain electrode of second transistor 122 is the second current output terminal 1221, and is electrically connected at the
One current output terminal 1142 and first switch connecting pin 221.One end of second resistance 123 is electrically connected at the 4th and compares input terminal
1212 with the source electrode of second transistor 122, other end ground connection, and the resistance value of second resistance 123 generally can be with first resistor 113
Resistance value is equal.In addition, the first reference voltage V1 be more than the second reference voltage V2, general first reference voltage V1 can for twice the
Two reference voltage V2, but it is without being limited thereto in other embodiment.
One end of first capacitance 13 is electrically connected at the second switch connecting pin 222 of first switch 22, and the other end is grounded, and
With one first capacitance voltage Vc1.Second switch 14 has third switch connecting pin 141 and one the 4th switch connecting pin
142, third switch connecting pin 141 is electrically connected at the second switch connecting pin 222 of the first capacitance 13 and first switch 22.
One end of second capacitance 15 is electrically connected at the 4th switch connecting pin 142, other end ground connection, and has one second electricity
Hold voltage Vc2.Constant voltage source module 16 is electrically connected at the second capacitance 15 and the 4th switch connecting pin 142, certain to provide
Voltage (figure does not indicate), and constant voltage, to provide the voltage of the second capacitance 15, specifically, constant voltage source module 16 includes one
Constant current source 161 and a third transistor 162, constant current source 161 are electrically connected at the second capacitance 15 and second switch 14
4th switch connecting pin 142, to provide a stabling current Ix.The source electrode of third transistor 162 is grounded, and grid is electrical with drain electrode
It is connected to constant current source 161, uses according to stabling current Ix and generates stable constant voltage, that is to say, that in fact constant voltage
About 0.7V so that constant voltage is equal with the second capacitance voltage Vc2 and is similarly 0.7V.
Processing module 17 is electrically connected at the grid of the first capacitance 13, the second capacitance 15 and first switch 22 and second switch 14
Pole, and processing module 17 can be the circuit with processing capacity, and this circuit may generally be of comparator, uses and compares the first electricity
Hold the value of voltage Vc1 and the second capacitance voltage Vc2.
First compares output end 1113 exports one first reference current Ir1, first resistor 113 according to the first reference voltage V1
Second end 1132 possessed by load resistance voltage Vcs so that the first transistor 112 and first resistor 113 is received first with reference to electricity
After flowing Ir1, time-dependent current Ic is generated according to load resistance voltage Vcs.The connection output end 1141 of current mirroring circuit 114 equally exports
Time-dependent current Ic makes the first current output terminal 1142 replicate output power transformation according to the time-dependent current Ic that connection output end 1141 is exported
Flow Ic.
Second compares output end 1213 exports one second reference current Ir2, second transistor according to the second reference voltage V2
122 drain electrode exports constant current If according to the second reference current Ir2, and second resistance 123 is receiving constant current If, that is,
It says, the second reference current Ir2 can be made to switch to continue to flow through constant current If without changing via the terminal voltage of second resistance 123
Become.Processing module 17 is used stable average current and is made to control conducting one of first switch 22 and second switch 14
Average current is steadily exported to light emitting diode.Wherein, since the first reference voltage V1 is twice of the second reference voltage V2,
If load resistance voltage Vcs is zero, then time-dependent current Ic is twice of constant current If, that is, 2If=Ic.
Specifically, as shown in figure 3, first controlling the conducting of first switch 22 in processing module 17 and closing second switch 14
(on section T1, Fig. 3 chart first switch 22 conducting with close waveform), and time-dependent current Ic be more than constant current If when, time-dependent current
The difference of Ic and constant current If generates a charging current I1, and I1 pairs of the first capacitance 13 charging of charging current, using makes the first capacitance
Charging current I1 is stored as an electric power storage stream (not shown) by 13, and it is negative average current to be made to flow through under being connected due to first switch 22
The load resistance 21 for carrying circuit, to make load resistance voltage Vcs be gradually increased and (be gradually increased from mark point A), and with negative
The increase for carrying resistive voltage Vcs, can be such that time-dependent current Ic reduces gradually, and make time-dependent current Ic when load resistance voltage Vcs is increased to
When equal with constant current If, i.e., to reaching mark point B in Fig. 3.
Load resistance voltage Vcs, which can rise to, at this time makes time-dependent current Ic be less than constant current If so that the first capacitance 13 discharges
Electric power storage stream and generate a discharge current I2, discharge current I2 is the difference of constant current And if time-dependent current Ic, and in the first capacitance 13
It is discharged to when keeping the first capacitance voltage Vc1 of the first capacitance 13 equal with the second capacitance voltage Vc2 of the second capacitance 15 (from label
Point B to mark point C), triggering processing module 17 closes first switch 22 and is simultaneously connected second switch 14, and then enters section T2 and complete
At the action that the switched conductive of entire first switch 22 is closed, thus the conducting and closing of first switch 22 can be steadily controlled,
And then control inductive current rise and fall (first switch 22 conducting the electric current of inductance PA117 shown in FIG. 1 can be made to increase,
First switch 22 closes the current reduction that can then make inductance PA117, and increases highest cutting edge of a knife or a sword value and reduce the flat of minimum cutting edge of a knife or a sword value
Mean value is average current), use control average current driving load circuit.
In summary, using the driving circuit provided by the present invention according to capacitor charge and discharge toggle switch
Afterwards, since the voltage swing of difference and two capacitances according to time-dependent current and constant current is to determine whether close opening for load circuit
It closes, therefore capacitor charge and discharge can be controlled really and stablize average current, so regardless of being linear work or non-thread in inductive current
It in the state of sex work, can all make the average current that adjustment goes out for the value to be set, and then effectively solve asking for the prior art
Topic.
Certainly, the invention may also have other embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding change and deformations, but these corresponding changes and change in accordance with the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (7)
1. a kind of driving circuit according to capacitor charge and discharge toggle switch, under a continuous conduction mode, control one is flat
It includes a load resistance and a first switch that equal electric current, which drives a load circuit, the load circuit, which is grounded,
There is a load resistance voltage, the first switch to have a first switch connecting pin and a second switch connecting pin for one end, should
Include according to the driving circuit of capacitor charge and discharge toggle switch：
One first current output module, have one first current output terminal, first current output terminal be electrically connected at this first
Connecting pin is switched, which is electrically connected at the load resistance, to according to the load resistance voltage output
One time-dependent current；
One second current output module, have one second current output terminal, second current output terminal be electrically connected at this first
Switch first current output terminal of connecting pin and first current output module, second current output terminal and to export one
Constant current；
One first capacitance, one end are electrically connected at the second switch connecting pin, other end ground connection；
One second switch has third switch connecting pin and one the 4th switch connecting pin, and it is electrical which switchs connecting pin
It is connected to first capacitance and the second switch connecting pin；
One second capacitance, one end are electrically connected at the 4th switch connecting pin, other end ground connection；
Certain voltage source module is electrically connected at second capacitance and the 4th switch connecting pin, to provide certain voltage, and
The constant voltage is providing the voltage of second capacitance；And
One processing module is electrically connected at the grid of first capacitance, second capacitance and the first switch and the second switch,
To control conducting one of the first switch and the second switch；
Wherein, it controls the first switch in the processing module and is connected and closes the second switch, and the time-dependent current is more than the fixed electricity
When stream, the difference of the time-dependent current and the constant current generates a charging current, and to first capacitor charging, use makes the charging current
The charging current is stored as an electric power storage stream by first capacitance, and the load resistance voltage is gradually increased and makes the time-dependent current gradually
It reduces；When the time-dependent current is less than the constant current, which discharges the electric power storage stream and generates a discharge current, electric discharge electricity
Stream is the difference of the constant current and the time-dependent current, and one first capacitance voltage for making first capacitance is discharged in first capacitance
When equal with one second capacitance voltage of second capacitance, trigger the processing module and close the first switch and this is connected and second open
Close, use control the average current drive the load circuit.
2. the driving circuit according to claim 1 according to capacitor charge and discharge toggle switch, which is characterized in that this first
Current output module includes：
One first comparator has one first compare input terminal, one second compare input terminal and one first compare output end, should
First compares input terminal for receiving one first reference voltage, this first compares output end to according to first reference voltage output
One first reference current；
One the first transistor, the grid of the first transistor be electrically connected at the first comparator this first compare output end；
One first resistor, has a first end and a second end, the first end be electrically connected at this second compare input terminal with should
The source electrode of the first transistor, the second end are electrically connected at the load resistance and have the load resistance voltage, use make this
After one transistor receives first reference current with the first resistor, the time-dependent current is generated according to the load resistance voltage；And
There is one current mirroring circuit a connection output end and first current output terminal, the connection output end to be electrically connected at this
The drain electrode of the first transistor, and the time-dependent current is exported, to make first current output terminal should according to connection output end output
Time-dependent current.
3. the driving circuit according to claim 2 according to capacitor charge and discharge toggle switch, which is characterized in that this second
Current output module includes：
There is one second comparator a third to compare input terminal, one the 4th compare input terminal and one second compare output end, should
Third compares input terminal for receiving one second reference voltage, this second compares output end to according to second reference voltage output
One second reference current；
One second transistor, the grid of the second transistor are electrically connected at this and second compare output end, the second transistor
Drain electrode is second current output terminal, and is electrically connected at first current output terminal, to defeated according to second reference current
Go out the constant current；And
One second resistance, one end are electrically connected at the 4th source electrode for comparing input terminal and the second transistor, and the other end is grounded,
The second resistance is receiving the constant current.
4. the driving circuit according to claim 3 according to capacitor charge and discharge toggle switch, which is characterized in that this first
Reference voltage is more than second reference voltage.
5. the driving circuit according to claim 1 according to capacitor charge and discharge toggle switch, which is characterized in that the fixed electricity
Potential source module includes：
One constant current source is electrically connected at fourth switch connecting pin of second capacitance with the second switch, to provide one
Stabling current；And
One third transistor, the source electrode ground connection of the third transistor, the grid of the third transistor are electrically connected with the drain in this
Constant current source is used and generates the constant voltage according to the stabling current.
6. the driving circuit according to claim 1 according to capacitor charge and discharge toggle switch, which is characterized in that the load
Circuit is a circuit of LED.
7. the driving circuit according to claim 1 according to capacitor charge and discharge toggle switch, which is characterized in that the fixed electricity
Pressure is equal with second capacitance voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237013.5A CN106300967B (en) | 2015-05-11 | 2015-05-11 | Driving circuit according to capacitor charge and discharge toggle switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237013.5A CN106300967B (en) | 2015-05-11 | 2015-05-11 | Driving circuit according to capacitor charge and discharge toggle switch |
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| Publication Number | Publication Date |
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| CN106300967A CN106300967A (en) | 2017-01-04 |
| CN106300967B true CN106300967B (en) | 2018-09-14 |
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| EP1178591B1 (en) * | 2000-07-31 | 2004-04-14 | STMicroelectronics S.r.l. | Power supply device with detection of malfunctioning |
| CN101572974A (en) * | 2009-04-17 | 2009-11-04 | 上海晶丰明源半导体有限公司 | High efficiency constant current LED drive circuit and drive method |
| US8421428B2 (en) * | 2009-03-26 | 2013-04-16 | Green Solution Technology Co., Ltd. | Current trigger circuit and switching power converter using the same |
| CN103208862A (en) * | 2012-01-17 | 2013-07-17 | 财团法人工业技术研究院 | Timing control circuit for switching capacitor dynamic switch and control method thereof |
-
2015
- 2015-05-11 CN CN201510237013.5A patent/CN106300967B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1178591B1 (en) * | 2000-07-31 | 2004-04-14 | STMicroelectronics S.r.l. | Power supply device with detection of malfunctioning |
| US8421428B2 (en) * | 2009-03-26 | 2013-04-16 | Green Solution Technology Co., Ltd. | Current trigger circuit and switching power converter using the same |
| CN101572974A (en) * | 2009-04-17 | 2009-11-04 | 上海晶丰明源半导体有限公司 | High efficiency constant current LED drive circuit and drive method |
| CN103208862A (en) * | 2012-01-17 | 2013-07-17 | 财团法人工业技术研究院 | Timing control circuit for switching capacitor dynamic switch and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN106300967A (en) | 2017-01-04 |
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Effective date of registration: 20180820 Address after: 1, 7 yuan, 2 yuan 1 Street, Hsinchu, Taiwan, China Applicant after: Advanced Analog Technology, Inc. Address before: Taiwan Hsinchu County Tai Yuan Street China jhubei City, No. 38 3 floor 8 Applicant before: Yuanxiang Technology Co., Ltd. |
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