CN208227375U - A kind of LED thyristor regulating optical circuit of leakage current self-regulation - Google Patents
A kind of LED thyristor regulating optical circuit of leakage current self-regulation Download PDFInfo
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- CN208227375U CN208227375U CN201820397556.2U CN201820397556U CN208227375U CN 208227375 U CN208227375 U CN 208227375U CN 201820397556 U CN201820397556 U CN 201820397556U CN 208227375 U CN208227375 U CN 208227375U
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Abstract
The utility model relates to a kind of LED thyristor regulating optical circuits of leakage current self-regulation comprising silicon-controlled mould group, rectification circuit, constant-current control circuit, leadage circuit, leakage current control circuit；It detects the leakage current when shutdown of silicon-controlled mould group, and control the leakage current according to the size of the leakage current by the way that the leakage current control circuit is arranged, the size of corresponding setting leakage current, it controls silicon-controlled mould group to be reliably connected, reduces the loss of power, improve power-efficient.
Description
Technical field
The utility model relates to LED to dim field, in particular to a kind of LED thyristor regulating photoelectricity of leakage current self-regulation
Road.
Background technique
In field of LED illumination, thyristor regulating optical circuit is widely used, and circuit structure is simple, low in cost, and makes
With convenient, controllability is stronger, with the increase of the market share of LED illumination product, thyristor regulating optical circuit also plays more next
More important role.
Fig. 1 is the circuit structure diagram of existing silicon-controlled mould group (SCRA), on or off two states, can
After controlling silicon S1 conducting, to maintain thyristor S1 in the conductive state, is had in silicon-controlled mould group SCRA and electric current is maintained to flow through.Reason
In the case of thinking, silicon-controlled electric current no when off passes through, but as shown in Figure 1, silicon-controlled is a modular structure, the mould
Group device can not be in perfect condition, and at the time of silicon-controlled S1 shutdown, silicon-controlled mould group still has electric current to flow through, this electricity
Stream is exactly the leakage current of silicon-controlled mould group.The general very little of leakage current of silicon-controlled mould group, numerical value is about at several milliamperes to more than ten millis
Between peace, electric current is maintained to be greater than leakage current.
Existing LED thyristor regulating optical circuit is dimmed using above-mentioned silicon-controlled mould group, circuit structure such as Fig. 2 institute
Show, including silicon-controlled mould group 10, rectification module 20, constant flow module 30；When being lower than setting voltage because of the voltage at LED light string both ends,
LED light string is not turned on, and no current flows through thereon, in order to enable silicon-controlled mould group 10 to be reliably connected in a certain angle, in LED tune
Leadage circuit is set in optical circuit, leadage circuit includes power tube M1 and resistance R3, in LED light string when no current for can
It controls silicon mould group and electric current is provided, under normal circumstances, the vent discharge flow valuve of leadage circuit setting is greater than silicon-controlled mould group and maintains electric current,
To guarantee the reliably working of silicon-controlled mould group 10.
It is silicon-controlled be transferred on state from off state after, silicon-controlled mould group is in low resistance state, voltage after cut phase
When the setting voltage needed is connected greater than LED, there is electric current to flow through in LED light string, the conducting electric current flowed through in silicon-controlled mould group is
Electric current in LED light string；When voltage after cut phase is less than the setting voltage that LED conducting needs, LED light string is not turned on, thereon
Also it is flowed through without electric current, the conducting electric current flowed through in silicon-controlled mould group is primarily limited to silicon-controlled mould group itself, in such case
Under, leakage current is the conducting electric current that flows through in silicon-controlled mould group, is a kind of loss because of electric current thus and without flow through LED light string
Electric current, under normal circumstances, silicon-controlled conducting electric current are M times of its leakage current.The leakage current of silicon-controlled mould group is because of device difference
And it is different, when designing LED light adjusting circuit, the leakage current of leadage circuit all to be designed greater than maximum leakage current, with
Ensure that LED light adjusting circuit is matched with most of silicon controlled module, thus realize controllable silicon light modulation, thus leadage circuit designs
Loss current it is also larger, especially when a silicon-controlled mould group controls N number of LED module, because each LED module is set
It is equipped with light adjusting circuit, the total leakage current flowed through in silicon-controlled mould group will be N times of single light adjusting circuit leakage current, energy
It is lost bigger.
How above-mentioned leakage current (in controlled silicon conducting and when circuit voltage be less than the conducting voltage of LED) is controlled,
Reducing the power loss because of caused by leakage current to improve power-efficient is current urgent problem to be solved.
New content
The utility model be exactly in order to solve the problems, such as how to control leakage current with improve power-efficient this.It is not for
With silicon-controlled mould group corresponding leakage current is set automatically, make that light adjusting circuit be connected in silicon-controlled cut phase and corresponding power supply is electric
Pressure is less than in the case of the conducting voltage of LED light string, reduces leakage current accordingly, to improve power-efficient.
To realize the above-mentioned technical purpose, the utility model takes following technical scheme:
A kind of LED thyristor regulating optical circuit of leakage current self-regulation comprising silicon-controlled mould group (10), rectification circuit
(20), constant-current control circuit (30), leadage circuit, leakage current control circuit (40)；
Silicon-controlled mould group (10) connection rectification circuit (20), is used for control circuit corner cut；
The rectification circuit (20) is attached with leadage circuit, leakage current control circuit (40), LED light source, carries out
Commutation supply voltage；
The constant-current control circuit (30) connects the LED light source, carries out current constant control；
The leadage circuit includes power tube M1 and bleeder resistance R3, for the voltage at LED light string both ends lower than setting
Current loop is provided when voltage for silicon-controlled mould group (10)；
The control terminal of one end G1 connection power tube M1 of the leakage current control circuit (40), other end A2 connection are released
The output end of resistance R3 and power tube M1, it is another to hold A1 connection DC power supply terminal, the 4th end A4 connection constant-current control circuit (30)；
For being controlled according to the size of silicon-controlled mould group (10) leakage current leakage current, the leakage current is silicon-controlled mould group
The conducting electric current for beginning to turn on silicon-controlled mould group when voltage is less than the conducting voltage of LED light string.
Preferably, the leakage current control circuit (40), bleeder resistance R3, power tube M1 are integrated in same chip.
Preferably, the leakage current control circuit (40) samples bleeder resistance when detecting the shutdown of silicon-controlled mould group
The voltage V1 of the one end R3, and the leakage current of silicon-controlled mould group is obtained according to voltage at this time；Detecting silicon-controlled mould group conducting,
And when there is no electric current to flow through in LED light string, leakage current control circuit (40) controls leading for power tube M1 according to leakage current
Galvanization size, so that the leakage current of silicon-controlled mould group (10) is flowed through in control.
Preferably, the leakage current control circuit (40), including voltage sample module (410), current sampling module
(420), corner cut detection module (430) and control output module (440)；Wherein, the voltage sample module (410), which has, carries out
The end A2 of data acquisition, output end connect the control output module (440)；The control output module (440) one end connects
The output end of current sampling module (420) is connect, one end connects the output end of corner cut detection module (430), another end connection voltage
The output end of sampling module (410) also has the end G1 being attached with the control terminal of the power tube M1；Wherein, described
Voltage sample module (410) is used to detect the leakage current of silicon-controlled mould group, and current sampling module (420) is for detecting LED light string
In whether there is electric current to flow through, corner cut detection module (430) for detect it is silicon-controlled whether be connected, the conducting refers to silicon-controlled cut
State behind angle, the state before silicon-controlled non-corner cut are shutdown；Output module (440) are controlled to be used for according to voltage sample module
(410) the corner cut signal of the lamp current signal N of leakage current signal H, current sampling module (420), corner cut detection module (430)
The size of current that R control power tube M1 flows through.
Preferably, the control output module (440) includes amplifying unit (441), control unit (442), driving unit
(443)；Wherein, for amplifying to silicon-controlled mould group (10) leakage current, control unit (442) is used for amplifying unit (441)
Different control signal g, the output drive signal after over-drive unit (443) are exported according to corner cut signal R, lamp current signal N
G1；Wherein, the amplifying unit (441), control unit (442), driving unit (443) are sequentially connected.
Preferably, size Discrete control of the leakage current control circuit (40) according to leakage current, in controlled silicon conducting
And when no current flows through in LED light, to the leakage current of same numberical range, the leakage current of the different silicon-controlled mould groups of control is one
Fixed value, the corresponding fixed value of different leakage current numberical ranges are different.
Preferably, multiple setting voltages are arranged in the amplifying unit (441), it is described to the leakage current of different numberical ranges
The different control voltage of control unit (442) corresponding selection, driving unit (443) is according to the output of described control unit (442)
The leakage current for controlling silicon-controlled mould group is different fixed value, plurality of to refer to more than or equal to 2.
As it can be seen that the utility model discloses a kind of LED thyristor regulating optical circuit of leakage current self-regulation, it can by detection
The leakage current when shutdown of silicon mould group is controlled, and according to the size of leakage current, the corresponding size that leakage current is arranged is maintained silicon-controlled
It is in the conductive state, the loss of power is greatly reduced, power-efficient is improved；Mould group silicon-controlled for one controls N paths of LEDs
When lamp light adjusting circuit, the leakage current on every road is the 1/N of silicon-controlled mould group leakage current, thus realize in silicon-controlled begin to turn on and
The leakage current on the road no current Shi Ge is the 1/N of silicon-controlled leakage current in LED light string, and silicon-controlled leakage current is leakage current
K times, significantly reduce the loss of power.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of silicon-controlled mould group in the prior art；
Fig. 2 is the circuit structure diagram of LED thyristor regulating optical circuit in the prior art；
Fig. 3 is the LED thyristor regulating optical circuit that leakage current self-regulation can be carried out in the utility model one embodiment
Circuit structure diagram；
Fig. 4 is the circuit structure diagram of leakage current control circuit described in one specific embodiment of the utility model；
Fig. 5 is the voltage and current waveform of rectification circuit output end described in the above-mentioned specific embodiment of the utility model；
Fig. 6 is the circuit structure diagram that output module is controlled described in the utility model one more specific embodiment；
Fig. 7 is the circuit structure diagram that output module is controlled described in the utility model one more specific embodiment.
Specific embodiment
The disclosure is specifically described below with reference to specific embodiment and attached drawing 1- Fig. 7.
The utility model provides a kind of LED thyristor regulating optical circuit that can carry out leakage current self-regulation, can by detection
The leakage current when shutdown of silicon mould group is controlled, and according to the size of leakage current, the corresponding size that leakage current is arranged is maintained silicon-controlled
Mould group is in the conductive state, reduces the loss of power, improves power-efficient.
As shown in figure 3, the LED thyristor regulating optical circuit, including silicon-controlled mould group 10, rectification circuit 20, current constant control electricity
Road 30, leakage current control circuit 40 and leadage circuit, the constant-current circuit 30 are for controlling the electric current flowed through in LED light string
Constant current, the silicon-controlled mould group 10 are used for control circuit corner cut, and the rectification circuit 20 is used to AC power source being rectified into half-wave
DC power supply, the leadage circuit includes power tube M1 and bleeder resistance R3, for being silicon-controlled mould group in LED light no current
10 provide current loop, guarantee the reliable conducting of silicon-controlled mould group 10；The leakage current control circuit 40 is used for according to electric leakage
The size of stream controls leakage current, and leakage current is made to be able to maintain that silicon-controlled reliable conducting, improves power-efficient, reduces
Power consumption.
Preferably, leakage current control circuit 40, bleeder resistance R3, power tube M1 are integrated in same chip, are passed through
The same chip can realize the offer and control of leakage current in circuit.
Preferably, setting leakage current is K times of leakage current, wherein K is any number more than or equal to 1, to guarantee
Silicon-controlled good ON operation, it is furthermore preferred that K is equal to 4.
In addition, other modes also can be used and carry out leakage current control, a threshold value is such as arranged in some other embodiment
Electric current then sets leakage current equal to threshold current when leakage current is greater than threshold current by K times of amplified electric current.
Further, when being configured to the specific connection structure of circuit, as shown in figure 3, leakage current control electricity
The control terminal of one end G1 connection power tube M1 on road 40, the output end of the other end A2 connection bleeder resistance R3 and power tube M1, then
One end A1 connection DC power supply terminal, the 4th end A3 connection constant-current control circuit 30.The end A1 is for sampling half-wave DC power supply
Waveform；In silicon-controlled shutdown, the end A2 samples the voltage V1 of the one end bleeder resistance R3, and is obtained controllably according to voltage at this time
The leakage current of silicon mould group 10；The end A3 is flowed through for detecting in LED light string either with or without electric current, when the end A1 detects silicon-controlled mould group 10
When being connected, and not having electric current to flow through in LED light string, i.e., silicon-controlled mould group 10 is begun to turn on and the voltage at LED light string both ends is less than
When the conducting voltage of LED, the leakage current control circuit 40 outputs a control signal to power tube M1 according to leakage current and controls
Pole processed controls the conducting electric current size of power tube M1, so that the leakage current of silicon-controlled mould group 10 is flowed through in control.
Further, in a specific embodiment, specific circuit has been carried out to the leakage current control circuit 40
Structure design, as shown in Figure 4 comprising voltage sample module 410, current sampling module 420, corner cut detection module 430 and control
Output module 440 processed.Wherein, voltage sample module 410 is used to detect the leakage current of silicon-controlled mould group 10, current sampling module
Whether 420 have electric current to flow through for detecting in LED light string, and corner cut detection module 430 is for detecting whether silicon-controlled 10 be connected, institute
It states conducting and refers to the state after silicon-controlled corner cut, the state before silicon-controlled non-corner cut is shutdown；It controls output module 440 and is used for root
According to the leakage current signal H of voltage sample module 410, the lamp current signal N of current sampling module 420, corner cut detection module 430
Size of the electric current that corner cut signal R control power tube M1 flows through in different moments.
It is specific:
When corner cut detection module 430 detects electricity silicon-controlled in an off state, and detecting rectification circuit output end
When pressure is less than voltage threshold, current sampling module 420 detects that no current flows through in LED light string, corner cut detection module 430 is exported
First corner cut signal gives control output module 440, meanwhile, control output module 440 controls power tube M1 conducting, voltage sample mould
Block 410 detects the voltage V1 at the end bleeder resistance R3, obtains the leakage current of silicon-controlled mould group according to voltage V1 at this time, and will
This leakage current value, which exports, gives control output module 440；
When corner cut detection module 430 detects it is silicon-controlled in the conductive state when, the output of corner cut detection module 430 second is cut
Angle signal gives control output module 440, while current sampling module 420 detects that no current flows through in LED light string；Control output
Module 440 carries out K times of amplification to leakage current and obtains the first electric current I1 according to the size of leakage current, when the first electric current I1 is less than electricity
When flowing threshold value, when receiving the second corner cut signal, it is second that the electric current flowed through in power tube M1 is controlled according to the first electric current I1
Electric current 12；Preferably, the second electric current I2 is equal to the first electric current I1；When the first electric current I1 is greater than current threshold, the is being received
When two corner cut signals, it is third electric current I3 that the electric current flowed through in power tube M1 is controlled according to current threshold；Preferably, third electric current
I3 is equal to current threshold；
When corner cut detection module 430 detects silicon-controlled in the conductive state, while current sampling module 420 is detected
When having electric current to flow through in LED light string, control output module 440 controls power tube M1 shutdown；
When corner cut detection module 430 detects that the voltage of rectification circuit output end is still greater than voltage threshold, and current sample
When module 420 detects that no current flows through again in LED light string, it is believed that it is silicon-controlled still on state, control output module
The electric current flowed through in 440 control power tube M1 is the 4th electric current I4；Preferably, the 4th electric current I4 is equal to silicon-controlled maintenance electricity
Stream, it is furthermore preferred that the 4th electric current I4 is less than or equal to the reckling in the first electric current 11 and third electric current I3.
In order to preferably carry out directviewing description to above-mentioned control process, herein, in conjunction with practical LED thyristor regulating optical circuit
Circuit parameter variations carry out control process explanation, in the practical LED thyristor regulating optical circuit, the rectification circuit 20 it is defeated
The voltage waveform of outlet is as shown in figure 5, corresponding control process specifically:
At a moment, corner cut detection module 430 detects silicon-controlled in an off state and rectification circuit output end voltage
Less than voltage threshold, corner cut detection module 430 exports the first corner cut signal and gives control output module 440, meanwhile, current sample mould
Block 420 detects that no current flows through in LED light string, and control output module 440 controls power tube M1 conducting, voltage sample module
410 detection the ends bleeder resistance R3 voltage V1, according to voltage V1 at this time obtain silicon-controlled mould group leakage current be Ia, and by this
Leakage current value Ia, which is exported, gives control output module 440, and the leakage current flowed through in light adjusting circuit is maintained to the b moment；
At the b moment, corner cut detection module 430 detects silicon-controlled in the conductive state, the output of corner cut detection module 430 the
Two corner cut signals give control output module 440, while current sampling module 420 detects that no current flows through in LED light string；Control
Output module 440 carries out K times of amplification to leakage current Ia and obtains the first electric current I1, control power tube according to the size of leakage current Ia
The electric current flowed through in M1 is the minimum value in the first electric current I1 or current threshold, is set as Ib, and light adjusting circuit is maintained with this electric current to c
Moment.
At the c moment, corner cut detection module 430 detect it is silicon-controlled in the conductive state, while current sampling module 420 examine
Measuring in LED light string has electric current to flow through, and control output module 440 controls power tube M1 shutdown, the electric current flowed through in circuit at this time
Size for the electric current IC flowed through in LED light string, electric current Ic is determined that light adjusting circuit is with the maintenance of this electric current by constant-current control circuit 30
To the d moment；
At the d moment, current sampling module 420 detects that no current flows through again in LED light string, and corner cut detection module
430 detect silicon-controlled still on state, and controlling output module 440 and controlling the electric current flowed through in power tube M1 is Id, and
Maintain the voltage to rectification circuit output end again below repeating the above process after voltage threshold with this electric current.Preferably, Id etc.
In silicon-controlled maintenance electric current, it is furthermore preferred that the Id is less than the first electric current I1.
In a more specific embodiment, the particular circuit configurations of the control output module 440 are configured, such as
Shown in Fig. 6 comprising amplifying unit 441, control unit 442, driving unit 443, amplifying unit 441 are used for silicon-controlled mould group
Leakage current amplifies, and control unit 442 is used to export different control signal g according to corner cut signal R, lamp current signal N, after
And different driving signal G1 is exported after over-drive unit 443, it is acted accordingly for driving power pipe M1.
Specifically:
Indicate that silicon-controlled shutdown, lamp current signal N indicate LED in the corner cut signal R of the corner cut detection module 430 output
When no current flows through in lamp, amplifying unit 441 exports amplification electric current HA to control unit after carrying out K times of amplification to leakage current H
442；
Corner cut signal R indicate it is silicon-controlled begin to turn on, lamp current signal N indicate LED light in no current when, control power
Pipe M1 makes the electric current flowed through in silicon-controlled mould group be equal to K times or current threshold of leakage current；
Corner cut signal R indicate it is silicon-controlled continue conducting, lamp current signal N indicate LED light in have electric current when, switch-off power
Pipe M1 makes the electric current flowed through in silicon-controlled mould group be equal to the electric current in LED light:
Corner cut signal R indicate it is silicon-controlled continue conducting, lamp current signal N indicate LED light in no current again when, control
Power tube M1 is equal to the electric current flowed through in silicon-controlled mould group and maintains electric current.
In a specific embodiment, in order to preferably be matched with the silicon-controlled mould group of different size, for difference
Its silicon-controlled leakage current it is different, the leakage currents of 442 pairs of control unit K times of amplifications are concluded by size, to belonging to certain
The leakage current of one numberical range, K times with numerical value leakage current a certain in the numberical range is benchmark electric current, when controlled silicon conducting,
In LED light when no current, power tube M1 is controlled, the electric current flowed through in silicon-controlled mould group is made to be equal to reference current or current threshold.
In a more specific embodiment, specific setting, such as Fig. 7 have been carried out to the circuit structure of the amplifying unit 441
Shown, which does not amplify leakage current signal, but multiple setting voltages are arranged, as in figure Vh1,
Vh2, Vh3 are concluded different leakage currents by numerical values recited, export a leakage for the leakage current of a certain numberical range
Current signal exports different leakage current signals to the leakage current of different numberical ranges, and such as h1, h2, h3 in Fig. 7, control is single
Member 442 selects different control voltage V21, V31, V41 signals to export to driving unit different according to different leakage current signals
Driving signal, when in silicon-controlled begin to turn on and no current flows through in LED light, controlling the electric current flowed through in silicon-controlled mould group is
One fixed value, different leakage current numberical ranges correspond to different fixed values.
Correspondingly, setting, control voltage V41 > V31 > V21 > V11, setting voltage Vh3 > Vh2 > Vh1, then: when V1 is small
When being equal to Vh1,441 output leakage current signal h1 of amplifying unit is to control unit 442；It is less than or equal to Vh2 when V1 is greater than Vh1
When, 441 output leakage current signal h2 of amplifying unit is to control unit 442；When V1 is greater than Vh2 and is less than or equal to Vh3, amplification is single
First 441 output leakage current signal h3 first states are to control unit 442；When V1 is greater than Vh3, the output electric leakage of amplifying unit 441
The second state of signal h3 is flowed to control unit 442.Preferably, the amplifying unit 441 uses multiplier.
Further, described control voltage V11, V21, V31 are proportional to setting voltage Vh1, Vh2, Vh3 respectively, for example,
Control voltage V11, V21, V31 are corresponding setting K times of voltage Vh1, Vh2, Vh3 respectively, set voltage Vh1, Vh2, Vh3 and
Leakage current is linearly related, i.e. setting voltage and leakage current is linearly related, and control voltage is related to setting voltage linear after amplification.
In another embodiment, reset signal h4 is arranged to described control unit 442, each end cycle resets to control
Voltage V11 processed.When control unit 442 indicates that silicon-controlled shutdown, lamp current signal N indicate no current in LED light in corner cut signal R
When flowing through, control S1 switch selection conducting, it is as follows that rule is connected in S1 triggering selection: V1≤Vh1, and selection control voltage V11 is to drive
Moving cell；Vh1≤V1≤Vh2, voltage V21 is to driving unit for selection control；Vh2≤V1≤Vh3, selection control voltage V31 give
Driving unit；Vh3≤V1, voltage V41 is to driving unit for selection control；Each end cycle resets to control voltage V11.
Correspondingly, can first be amplified to leakage current, control voltage V11, V21, V31 and amplified electric leakage streamline
Property it is related.It sets voltage Vh1, Vh2, Vh3 and amplified leakage current is linearly related, is i.e. setting voltage and amplified leakage current
Linear correlation, control voltage are related to setting voltage linear.
To sum up, the utility model provides a kind of LED thyristor regulating optical circuit that can carry out leakage current self-regulation, passes through
The leakage current when shutdown of silicon-controlled mould group is detected, and according to the size of leakage current, the corresponding size that leakage current is arranged is maintained
Silicon-controlled mould group is in the conductive state, reduces the loss of power, improves power-efficient.In addition, when the utility model is applied to one
When a silicon-controlled mould group control N paths of LEDs lamp string, the control chip of N paths of LEDs shunts the leakage current of silicon-controlled mould group, thus, each road
In the leakage current that flows through be silicon-controlled mould group leakage current 1/N；When in controlled silicon conducting and no current flows through in LED light string, respectively
The leakage current flowed through in road is the 1/N of silicon-controlled mould group leakage current, and the leakage current of silicon-controlled mould group is the K of leakage current
Times, it is equally greatly reduced the loss of power, improves power-efficient.
Above-described embodiment is only illustrative the principle of the disclosure.It should be appreciated that arrangement described herein and details
Modifications and variations will will be apparent to persons skilled in the art.Therefore, it is intended that only by next Patent right requirement
Scope limitation, without being limited by the detail proposed and description and explanation to embodiment herein.
Claims (7)
1. a kind of LED thyristor regulating optical circuit of leakage current self-regulation, which is characterized in that it include silicon-controlled mould group (10),
Rectification circuit (20), constant-current control circuit (30), leadage circuit, leakage current control circuit (40)；
Silicon-controlled mould group (10) connection rectification circuit (20), is used for control circuit corner cut；
The rectification circuit (20) is attached with leadage circuit, leakage current control circuit (40), LED light source, is rectified
Power supply；
The constant-current control circuit (30) connects the LED light source, carries out current constant control；
The leadage circuit includes power tube M1 and bleeder resistance R3, for being silicon-controlled mould group in LED light string no current
(10) current loop is provided；
The control terminal of one end G1 connection power tube M1 of the leakage current control circuit (40), other end A2 connection bleeder resistance
The output end of R3 and power tube M1, it is another to hold A1 connection DC power supply terminal, the 4th end A3 connection constant-current control circuit (30)；It is described
Leakage current control circuit is described to release for being controlled according to the size of silicon-controlled mould group (10) leakage current leakage current
Electric current is the silicon-controlled conducting electric current for beginning to turn on voltage and being less than silicon-controlled mould group when the conducting voltage of LED light string.
2. LED thyristor regulating optical circuit according to claim 1, which is characterized in that the leakage current control circuit
(40), bleeder resistance R3, power tube M1 are integrated in same chip.
3. LED thyristor regulating optical circuit according to claim 1, which is characterized in that the leakage current control circuit
(40) when detecting the shutdown of silicon-controlled mould group, the voltage V1 of the one end bleeder resistance R3 is sampled, and is obtained according to voltage at this time
The leakage current of silicon-controlled mould group；Detect the conducting of silicon-controlled mould group and when there is no electric current to flow through in LED light string, vent discharge flow control
Circuit (40) processed controls the conducting electric current size of power tube M1 according to leakage current, so that silicon-controlled mould group (10) is flowed through in control
Leakage current.
4. LED thyristor regulating optical circuit according to claim 3, which is characterized in that the leakage current control circuit
(40), including voltage sample module (410), current sampling module (420), corner cut detection module (430) and control output module
(440)；
The output end of control output module (440) one end connection current sampling module (420), one end connect corner cut and detect mould
The output end of block (430), the output end of another end connection voltage sample module (410), also has with the power tube M1's
The end G1 that control terminal is attached；
The voltage sample module (410) is used to detect the leakage current of silicon-controlled mould group, and current sampling module (420) is for detecting
Whether there is electric current to flow through in LED light string, corner cut detection module (430) for detect it is silicon-controlled whether be connected, the conducting refers to
State after silicon-controlled corner cut, the state before silicon-controlled non-corner cut are shutdown；
Output module (440) are controlled for the leakage current signal H according to voltage sample module (410), current sampling module (420)
Lamp current signal N, corner cut detection module (430) the size of current that flows through of corner cut signal R control power tube M1.
5. LED thyristor regulating optical circuit according to claim 4, which is characterized in that control output module (440) packet
Include amplifying unit (441), control unit (442), driving unit (443)；
For amplifying to silicon-controlled mould group (10) leakage current, control unit (442) is used for according to corner cut amplifying unit (441)
Signal R, lamp current signal N export different control signal g, the output drive signal G1 after over-drive unit (443)；
The amplifying unit (441), control unit (442), driving unit (443) are sequentially connected.
6. LED thyristor regulating optical circuit according to claim 5, it is characterised in that:
The leakage current control circuit (40) is according to the size Discrete control of leakage current, nothing in controlled silicon conducting and in LED light
When electric current flows through, to the leakage current of same numberical range, the leakage current of the different silicon-controlled mould groups of control is a fixed value, different
The corresponding fixed value of leakage current numberical range it is different.
7. LED thyristor regulating optical circuit according to claim 6, it is characterised in that:
Multiple setting voltages are arranged in the amplifying unit (441), to the leakage current of different numberical ranges, described control unit
(442) the different control voltage of corresponding selection, driving unit (443) control controllable according to the output of described control unit (442)
The leakage current of silicon mould group is different fixed value, plurality of to refer to more than or equal to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820397556.2U CN208227375U (en) | 2018-03-22 | 2018-03-22 | A kind of LED thyristor regulating optical circuit of leakage current self-regulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820397556.2U CN208227375U (en) | 2018-03-22 | 2018-03-22 | A kind of LED thyristor regulating optical circuit of leakage current self-regulation |
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| CN208227375U true CN208227375U (en) | 2018-12-11 |
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| CN201820397556.2U Active CN208227375U (en) | 2018-03-22 | 2018-03-22 | A kind of LED thyristor regulating optical circuit of leakage current self-regulation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109392216A (en) * | 2018-03-22 | 2019-02-26 | 陕西亚成微电子股份有限公司 | A kind of leakage current method for self regulating and LED thyristor regulating optical circuit |
| CN110198580A (en) * | 2019-04-17 | 2019-09-03 | 美芯晟科技（北京）有限公司 | LED drive circuit, load control system, load system and control method |
| CN112684353A (en) * | 2019-10-17 | 2021-04-20 | 神讯电脑(昆山)有限公司 | Method for controlling current transmission state of battery module and calibrating battery capacity |
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2018
- 2018-03-22 CN CN201820397556.2U patent/CN208227375U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109392216A (en) * | 2018-03-22 | 2019-02-26 | 陕西亚成微电子股份有限公司 | A kind of leakage current method for self regulating and LED thyristor regulating optical circuit |
| CN109392216B (en) * | 2018-03-22 | 2024-03-08 | 陕西亚成微电子股份有限公司 | Method for self-adjusting discharge current and LED silicon controlled rectifier dimming circuit |
| CN110198580A (en) * | 2019-04-17 | 2019-09-03 | 美芯晟科技（北京）有限公司 | LED drive circuit, load control system, load system and control method |
| CN110198580B (en) * | 2019-04-17 | 2021-04-27 | 美芯晟科技（北京）有限公司 | LED drive circuit, load control system, load system and control method |
| CN112684353A (en) * | 2019-10-17 | 2021-04-20 | 神讯电脑(昆山)有限公司 | Method for controlling current transmission state of battery module and calibrating battery capacity |
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Effective date of registration: 20220719 Address after: 710000 Room 201, building 6, No. 15, Shanglinyuan 1st Road, high tech Zone, Xi'an, Shaanxi Province Patentee after: XI'AN YARUN MICRO OPTOELECTRONICS TECHNOLOGY CO.,LTD. Address before: Room 301, block a, Hanyun Pavilion, Xi'an Software Park, No. 68, Keji Second Road, high tech Zone, Xi'an, Shaanxi 710065 Patentee before: SHAANXI REACTOR MICROELECTRONICS Co.,Ltd. |