CN208386961U - Rising edge trigger circuit, driving chip and lighting driving system - Google Patents
Rising edge trigger circuit, driving chip and lighting driving system Download PDFInfo
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- CN208386961U CN208386961U CN201821144031.4U CN201821144031U CN208386961U CN 208386961 U CN208386961 U CN 208386961U CN 201821144031 U CN201821144031 U CN 201821144031U CN 208386961 U CN208386961 U CN 208386961U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a kind of rising edge trigger circuit, driving chip and lighting driving systems.Control is coupled using the signal of the voltage rising edge of forward position phase-cut dimmer start-up time, so that rising edge trigger circuit works at the time of only phase-cut dimmer is opened ahead of the curve, and the work of rising edge trigger circuit is controlled and is automatically closed after a certain period of time.When lighting driving system without light modulator or after connecing along phase-cut dimmer when, rising edge trigger circuit is in close state always.Not only it ensure that the steady operation of light modulator, but also the power consumption of system minimized, and ensure that preferable light modulator compatibility and system loss.
Description
Technical field
The utility model relates to integrated circuit actuation techniques field more particularly to a kind of rising edge trigger circuits, driving core
Piece and lighting driving system.
Background technique
" tunable optical " is a LED light source advantage critically important relative to conventional light source, accurate to control shining for LED light source
Intensity can build out different atmosphere, meet people to the diverse requirements of illumination.
Controllable silicon dimmer cardinal principle is the input by controlling electric light source, obtains varying strength from the input of electric current
Light, finally exported, process therein is controlled by silicon-controlled.Compared with transformer, resistor, thyristor regulating
Light device has entirely different light modulation mechanism, it realizes pressure regulation or light modulation using phase control method.Controllable silicon light modulation
Device controls dimming process by the two methods of time that the voltage swing and electric current that change load export.Pass through silicon-controlled adjusting
The electric current for needing to export, using silicon-controlled inspection when just needing to output output when adjusting out the electric current needed,
The standard for reaching institute's light requirement, finally just exports.The more big obtained light of the electric current of output is brighter, the smaller institute of the electric current of output
Obtained light is darker.
It is silicon-controlled as other semiconductor devices, have the advantages that small in size, high-efficient, stability is good, reliable operation.It can
Control silicon controls the controllable characteristics of conducting (passing through high current in silicon-controlled), exactly its area by trigger signal (small trigger current)
Not in the important feature of common silicon rectifier diode.Silicon-controlled for reverse block-type, lock properties of flow is shown as when silicon-controlled
In addition when adding positive control voltage appropriate while positive anode voltage again, it is silicon-controlled to turn on；Even if being removed after conducting
It will be maintained after going gate pole to control voltage, until being less than itself silicon-controlled maintenance plus reversed anode voltage or anode current
It is just turned off after electric current.Controllable silicon dimmer is exactly that triggering phase control in forward position is realized using this silicon-controlled characteristic.
Due to the characteristic of controllable silicon dimmer itself, needed when light modulator is opened sufficiently large load current trigger into
Enter on state, light modulator can be made to restart when trigger current is inadequate.Therefore LED driver be especially linear LED driver can be
Trigger circuit in parallel after rectifier bridge.
With reference to Fig. 1, the existing LED drive system configuration diagram with phase-cut dimmer.As shown in Figure 1, phase-cut dimming
Device 11 can for forward position phase-cut dimmer (Leading-edge Dimmer) or after along phase-cut dimmer (Trailing-edge
Dimmer)；Trigger circuit (Latch) 13, leadage circuit (Bleeder) 14, LED driver 15 are connected in parallel on rectifier bridge stack 12
Afterwards.Trigger circuit 13 is usually only in running order in the unlatching moment of phase-cut dimmer 11.Common practice is to rectify at present
Increase the trigger circuit 13 using RC damping after bridge heap 12, provides biggish trigger current when phase-cut dimmer 11 is opened.But
Be RC damping in capacitor C capacity it is larger, generally several hundred nF, phase-cut dimmer 11 open momentary capacitance charging current have
Larger noise；Namely the RC damping of the trigger circuit 13 of the prior art can bring additional noise and loss.And work as light adjusting circuit
In do not have light modulator or access after along phase-cut dimmer when, these for the elements such as the capacitor of trigger current are provided can be because of itself
Charge and discharge process and the output waveform for influencing light adjusting circuit make LED light generate scintillation.
How not only to have guaranteed the steady operation of phase-cut dimmer, but make the power consumption of system minimize as it is existing have cut
The lighting driving system of phase light modulator technical problem urgently to be resolved.
Utility model content
The purpose of this utility model is that for the trigger circuit of phase-cut dimmer in lighting driving system in the prior art
RC damping the technical issues of bringing additional noise and loss, a kind of rising edge trigger circuit, driving chip and photograph are provided
Bright drive system, had not only guaranteed the steady operation of phase-cut dimmer, but also the power consumption of system is minimized.
To achieve the above object, the utility model provides a kind of rising edge trigger circuit, the rising edge trigger circuit
For detecting the voltage rising edge signal of the forward position phase-cut dimmer start-up time after rectifying, and detecting the voltage rising
The rising edge trigger circuit is triggered after signal and is started to work enters on state to control the forward position phase-cut dimmer, and
It is closed after controlling the rising edge trigger circuit work preset time according to the voltage rising edge signal.
To achieve the above object, the utility model additionally provides a kind of lighting driving system, including rectifier bridge stack, vent discharge
Road, driver and load, the forward direction that the first input end of the rectifier bridge stack accesses AC power source by phase-cut dimmer are defeated
Outlet, the second input terminal of the rectifier bridge stack are electrically connected the inverse output terminal of the AC power source, and the of the rectifier bridge stack
Input voltage after the output rectification of one output end, the second output terminal ground connection of the rectifier bridge stack, the leadage circuit, driver
And load is connected in parallel between the first output end of the rectifier bridge stack and second output terminal；The lighting driving system also wraps
Rising edge trigger circuit is included, the rising edge trigger circuit is connected in parallel on the first output end and second output terminal of the rectifier bridge stack
Between；When the phase-cut dimmer is forward position phase-cut dimmer, the rising edge trigger circuit is used to detect the institute after rectification
The voltage rising edge signal of forward position phase-cut dimmer start-up time is stated, and triggers institute after detecting the voltage rising edge signal
It states rising edge trigger circuit and starts to work and enter on state to control the forward position phase-cut dimmer, and according on the voltage
It rises and is closed after the signal control rising edge trigger circuit work preset time；Along cut phase tune after the phase-cut dimmer is
When light device, the rising edge trigger circuit is in close state.
To achieve the above object, the utility model additionally provides a kind of driving chip, this is integrated in the driving chip
Rising edge trigger circuit described in utility model, the rising edge trigger circuit are used to detect the forward position phase-cut dimmer after rectification
The voltage rising edge signal of start-up time, and the rising edge trigger circuit is triggered after detecting the voltage rising edge signal
It starts to work to control the forward position phase-cut dimmer and enter on state, and according to voltage rising edge signal control
It is closed after rising edge trigger circuit work preset time.
To achieve the above object, the utility model additionally provides a kind of lighting driving system, including rectifier bridge stack, vent discharge
Road, driving chip and load, the first input end of the rectifier bridge stack access the forward direction of AC power source by phase-cut dimmer
Output end, the second input terminal of the rectifier bridge stack are electrically connected the inverse output terminal of the AC power source, the rectifier bridge stack
Input voltage after the output rectification of first output end, the second output terminal ground connection of the rectifier bridge stack, the leadage circuit, driving
Chip and load are connected in parallel between the first output end of the rectifier bridge stack and second output terminal；Collection in the driving chip
At there is rising edge trigger circuit described in the utility model, the rising edge trigger circuit is connected in parallel on the first of the rectifier bridge stack
Between output end and second output terminal；When the phase-cut dimmer is forward position phase-cut dimmer, the rising edge trigger circuit
For detecting the voltage rising edge signal of the forward position phase-cut dimmer start-up time after rectifying, and detecting the voltage
The rising edge trigger circuit is triggered after rising edge signal and is started to work enters conducting shape to control the forward position phase-cut dimmer
State, and closed after controlling the rising edge trigger circuit work preset time according to the voltage rising edge signal；It is cut when described
Phase light modulator be after along phase-cut dimmer when, the rising edge trigger circuit is in close state.
Utility model has the advantages that rising edge trigger circuit provided by the utility model utilizes forward position phase-cut dimmer
The signal of the voltage rising edge of start-up time couples control, so that rising edge trigger circuit only open ahead of the curve by phase-cut dimmer
Moment work, and control the work of rising edge trigger circuit and be automatically closed after a certain period of time.When lighting driving system without light modulator or
Person connect after along phase-cut dimmer when, rising edge trigger circuit is in close state always.Both it ensure that the steady operation of light modulator,
The power consumption of system is minimized, ensure that preferable light modulator compatibility and system loss.
Detailed description of the invention
Fig. 1, the existing LED drive system configuration diagram with phase-cut dimmer；
Fig. 2, the configuration diagram of rising edge trigger circuit described in the utility model；
Fig. 3 A, the circuit diagram of rising edge trigger circuit first embodiment described in the utility model；
Fig. 3 B, the circuit diagram of rising edge trigger circuit second embodiment described in the utility model；
Fig. 3 C, the circuit diagram of rising edge trigger circuit 3rd embodiment described in the utility model；
Fig. 4 A, the configuration diagram of lighting driving system first embodiment described in the utility model；
Waveform diagram when Fig. 4 B is system access forward position phase-cut dimmer shown in Fig. 4 A；
Fig. 5, the configuration diagram of lighting driving system second embodiment described in the utility model.
Specific embodiment
Rising edge trigger circuit, driving chip and lighting driving system provided by the utility model are done with reference to the accompanying drawing
It is described in detail.Obviously, described embodiment is only the utility model a part of the embodiment, instead of all the embodiments.Base
In the embodiments of the present invention, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, fall within the protection scope of the utility model.
With reference to Fig. 2, the configuration diagram of rising edge trigger circuit described in the utility model.On described in the utility model
It rises along trigger circuit, is suitable for lighting driving system, as long as there is forward position phase-cut dimmer, rising edge trigger circuit can cooperate
It uses, load is also not necessarily LED light, can be energy-saving lamp etc..Forward position phase-cut dimmer may include in lighting driving system
It is interior, or external components (for example, being arranged on wall as AC power source) do not include in lighting driving system.Specifically
, the rising edge trigger circuit 21 is used to detect the voltage rising edge of the forward position phase-cut dimmer start-up time after rectification
Signal, and trigger after detecting the voltage rising edge signal rising edge trigger circuit 21 start to work it is described to control
Forward position phase-cut dimmer enters on state, and controls 21 work of rising edge trigger circuit according to the voltage rising edge signal
It is closed after making preset time.When the lighting driving system without light modulator or including after along phase-cut dimmer when, the rising
It is in close state along trigger circuit 21.It may be afterwards external components (for example, being set as AC power source along phase-cut dimmer
Set on wall) it does not include in lighting driving system.
Specifically, the rising edge trigger circuit 21 includes rising edge detection and switch control unit 211, current limiting unit
212 and switch 213；The rising edge detection and switch control unit 211, first input end are used to detect the forward position after rectification
The voltage rising edge signal of phase-cut dimmer start-up time, the second input end grounding, output end are electrically connected the control of the switch 213
End processed；The current limiting unit 212 is electrically connected to the rising edge detection and switch control unit after connecting with the switch 213
Between 211 first input end and ground.The rising edge detection and switch control unit 211 are detecting the voltage rising edge
The switch 213 is controlled after signal, and (trigger current Ilatch corresponding with voltage rising edge signal is flowed through on switch 213) is connected,
And it is controlled after preset time is connected in the switch 213 and is closed according to the voltage rising edge signal.When the lighting driving system
No light modulator or including after along phase-cut dimmer when, the rising edge trigger circuit 21 rising edge detection and switch control list
Member 211 can't detect the voltage rising edge signal of the forward position phase-cut dimmer start-up time after rectification, therefore always in closing
State.
As shown in Fig. 2, the current limiting unit 212 is serially connected in rising edge detection and the first input of switch control unit 211
Between end and switch 213, for carrying out current limliting to the electric current for flowing into switch 213 and sharing the power consumption of switch 213.In other realities
Apply in example, the current limiting unit 212 can also be serially connected between switch 213 and ground terminal, for outflow switch 213 electric current into
Row current limliting and the curent change for slowing down switch 213；Or the current limiting unit 212 may include two parts, a part concatenation
Between rising edge detection and the first input end and switch 213 of switch control unit 211, for the electricity for flowing into switch 213
Stream carries out current limliting and shares the power consumption of switch 213, and a part is serially connected between switch 213 and ground terminal, for switching to outflow
213 electric current carries out current limliting and slows down the curent change of switch 213.
The utility model using light modulator and driver characteristic, on the voltage using forward position phase-cut dimmer start-up time
The signal coupling control rising edge trigger circuit for rising edge works at the time of only phase-cut dimmer is opened ahead of the curve, and controls rising edge
Trigger circuit work is automatically closed after a certain period of time.When lighting driving system without light modulator or after connecing along phase-cut dimmer when,
Rising edge trigger circuit is in close state always.Namely rising edge trigger circuit only works in necessary section, both protects in this way
The steady operation of light modulator has been demonstrate,proved, and the power consumption of system is minimized, ensure that preferable light modulator compatibility and system
Loss.
Next the specific embodiment of rising edge trigger circuit described in the utility model is provided in conjunction with Fig. 3 A-3C.Wherein,
Fig. 3 A is the circuit diagram of rising edge trigger circuit first embodiment described in the utility model；Fig. 3 B is the utility model institute
The circuit diagram for the rising edge trigger circuit second embodiment stated；Fig. 3 C is rising edge trigger circuit described in the utility model
The circuit diagram of 3rd embodiment.
As shown in Figure 3A, in the present embodiment, the rising edge detection and switch control of the rising edge trigger circuit 21
Unit 211 includes concatenated first capacitor C1 and first resistor R1, and the current limiting unit 212 includes second resistance R2, described to open
It closes 213 and uses power MOS pipe M1.The first end of first capacitor C1 is for detecting voltage rising edge signal；The of first capacitor C1
Two ends are electrically connected the first end of first resistor R1, the second end ground connection of first resistor R1；First capacitor C1's and first resistor R1
The grid end g of common end electrical connection power MOS pipe M1；Phase-cut dimmer start-up time ahead of the curve, R1, C1 return circuit coupling voltage rise
(it can detecte the voltage rising edge of the input voltage of lighting driving system or the load both ends of lighting driving system along signal
Voltage rising edge), C1 is started to charge, and charging current flows through R1 and generates pressure drop, and raising M1 grid end voltage is connected M1, before control
Enter on state along phase-cut dimmer, is closed after M1 conducting preset time.After power MOS pipe M1 connects with current limiting unit 212
It is electrically connected between the first end and ground of first capacitor C1；Specifically, the first end of second resistance R2 is electrically connected to first capacitor
The first end of C1, the drain electrode d of the second end electrical connection power MOS pipe M1 of second resistance R2, the source electrode s ground connection of power MOS pipe M1.
Specifically, the turn-on time of power MOS pipe M1 is time constant (1/ (R1*C1)), wherein R1 is first resistor R1
Resistance value, C1 be first capacitor C1 capacitance.Specifically, the resistance value of first resistor R1 is 10-100K Ω；The capacitance of first capacitor
For 0.1-0.9nF, such as 0.2nF.Namely R1 is the small signal resistance of tens K ranks；The capacitance of C1 is compared with the prior art
Capacitor (generally several hundred nF) in the circuit RC reduces thousand times, so that the charging current that light modulator opens momentary capacitance is smaller, compared with
Small noise additionally.
Specifically, the turn-on time of power MOS pipe M1 is 100~300us, turn off, namely is risen along trigger circuit later
In closed state, to guarantee preferable light modulator compatibility and system loss.
Specifically, the resistance value of second resistance R2 is 1-9K Ω.Namely R2 is the resistance of K rank, for the electricity for flowing into M1
Stream carries out current limliting and shares the power consumption of M1.
Such as Fig. 3 B, first embodiment shown in the present embodiment and Fig. 3 A the difference is that, current limliting described in the present embodiment
Unit 212 includes second resistance R2 and 3rd resistor R3 simultaneously.Specifically, the first end of second resistance R2 is electrically connected to first
The first end of capacitor C1, the drain electrode d, the source electrode s of power MOS pipe M1 of the second end electrical connection power MOS pipe M1 of second resistance R2
It is electrically connected the first end of 3rd resistor R3, the second end ground connection of 3rd resistor R3.R2 is used to carry out current limliting to the electric current for flowing into M1
And the power consumption of M1 is shared, R3 is used to carry out current limliting to the electric current of outflow M1 and slows down the curent change of M1.In other implementations
In example, the current limiting unit 212 can also only include the 3rd resistor being connected electrically between the source electrode s of power MOS pipe M1 and ground
R3。
Specifically, the resistance value of 3rd resistor R3 is 10-100 Ω.R3 is the other small resistance of tens ohm levels, the voltage on M1
The voltage on R3 is subtracted equal to the voltage on R1.The charging current of C1 is bigger, and the voltage on R3 is higher, and the pressure drop on R3 makes M1
Vgs voltage reduce, be equivalent to negative-feedback, limited with the current capacity to metal-oxide-semiconductor itself, so that metal-oxide-semiconductor curent change
It is more gentle.
Such as Fig. 3 C, second embodiment shown in the present embodiment and Fig. 3 B the difference is that, rise described in the present embodiment
It further comprise clamp diode D1, rectifier diode D2 and the second capacitor C2 along detection and switch control unit 211.Clamper two
Pole pipe D1, anode are electrically connected the second end of first capacitor C1, minus earth, the both ends g, s electricity for clamper power MOS pipe M1
Pressure, to ensure metal-oxide-semiconductor work in confidence band；Rectifier diode D2, anode are electrically connected the second end of first capacitor C1, cathode
It is electrically connected the first end, the first end of the second capacitor C2 and the grid end of power MOS pipe M1 of first resistor R1 simultaneously, for filtering
Oscillation on first capacitor C1；The second end of second capacitor C2 is grounded, and the capacitance of the second capacitor C2 is greater than the appearance of first capacitor C1
Value.The capacitance of C1 can be several nF of zero point, and the capacitance of C2 can be several nF, and the capacitance of C2 is tens times of the capacitance of C1.
Phase-cut dimmer start-up time ahead of the curve, after first capacitor C1 detects voltage rising edge signal, first capacitor C1
Charging is started simultaneously at the second capacitor C2, the charging current of first capacitor C1 flows through first resistor R1 and generates pressure drop control power
Metal-oxide-semiconductor M1 conducting, pressure drop of the charging current of the second capacitor C1 to maintain the both ends first resistor R1, power MOS pipe M1 conducting
It is closed after preset time.That is, the voltage on R1 is provided by C1, kept by C2.Correspondingly, power MOS pipe M1 in the present embodiment
Turn-on time be time constant (1/ (R1*C2)), wherein R1 be first resistor R1 resistance value, C2 be the second capacitor C2 appearance
Value.
Next the embodiment of lighting driving system described in the utility model is provided in conjunction with attached drawing.
With reference to Fig. 4 A-4B, wherein Fig. 4 A is that the framework of lighting driving system first embodiment described in the utility model shows
It is intended to；Waveform diagram when Fig. 4 B is system access forward position phase-cut dimmer shown in Fig. 4 A.The lighting driving system is suitable
For LED drive system, it is equally applicable to other lighting driving systems；As long as there is forward position phase-cut dimmer, rising edge triggering electricity
Road can be used cooperatively；Load can be LED light and be also possible to energy-saving lamp etc..Forward position phase-cut dimmer may include illuminating
In drive system, or external components (for example, being arranged on wall as AC power source) do not include illumination driving system
In system.
As shown in Figure 4 A, the lighting driving system include rectifier bridge stack 42, leadage circuit 44, driver 45 and
Load 46.The first input end of the rectifier bridge stack 42 accesses the positive output end of AC power source AC by phase-cut dimmer 41,
Second input terminal of the rectifier bridge stack 42 is electrically connected the inverse output terminal of the AC power source AC, and the of the rectifier bridge stack 42
Input voltage VBUS after the output rectification of one output end, the second output terminal ground connection of the rectifier bridge stack 42；The leadage circuit
44, driver 45 and load 46 are connected in parallel between the first output end and second output terminal of the rectifier bridge stack 42；It is described
Lighting driving system further include rising edge trigger circuit 43, the rising edge trigger circuit 43 is connected in parallel on the rectifier bridge stack 42
The first output end and second output terminal between.When the phase-cut dimmer 41 is forward position phase-cut dimmer, the rising edge
Trigger circuit 43 is used to detect the voltage rising edge signal of the forward position phase-cut dimmer start-up time after rectification, and detecting
It states to trigger the rising edge trigger circuit 43 after voltage rising edge signal and start to work to enter to control forward position phase-cut dimmer and lead
Logical state, and closed after controlling the work preset time of rising edge trigger circuit 43 according to the voltage rising edge signal.When described
Phase-cut dimmer 41 be after along phase-cut dimmer when, the rising edge trigger circuit 43 is in close state.Afterwards along phase-cut dimming
Device may be that external components (for example, being arranged on wall as AC power source) do not include in lighting driving system.
Optionally, the voltage rising edge signal of the forward position phase-cut dimmer start-up time after rectification can be defeated after rectification
Enter the voltage rising edge signal of voltage VBUS or loads the voltage rising edge signal namely rising edge trigger circuit 43 at 46 both ends
It can the voltage rising edge signal by the input voltage VBUS after detection rectification or the voltage by 46 both ends of detection load
Rising edge signal, to trigger work to control forward position phase-cut dimmer and enter on state.
Rising edge trigger circuit is controlled only using the signal coupling of the voltage rising edge of forward position phase-cut dimmer start-up time
It works at the time of phase-cut dimmer is opened ahead of the curve, and controls the work of rising edge trigger circuit and be automatically closed after a certain period of time.When
Lighting driving system without light modulator or after connecing along phase-cut dimmer when, rising edge trigger circuit is in close state always.?
I.e. rising edge trigger circuit only works in necessary section, not only ensure that the steady operation of light modulator in this way, but also make system
Power consumption minimizes, and ensure that preferable light modulator compatibility and system loss.Specifically, the rising edge trigger circuit 43 can
Using rising edge trigger circuit described in the utility model Fig. 2, Fig. 3 A- Fig. 3 C any embodiment.
As shown in Figure 4 B, when the phase-cut dimmer of system access forward position, using silicon-controlled characteristic, AC sinusoidal voltage is through whole
Output-input voltage VBUS after bridge heap rectifies is flowed, cut phase is carried out when the input voltage VBUS half period starts, have passed through and dim
After the corresponding a period of time of position, system switching conducting is load supplying until after the half period, repeats same operation.Cause
And forward position phase-cut dimmer is when carrying out cut phase, is exactly to start in input voltage VBUS phase 0, input voltage is chopped into, until
Forward position phase-cut dimmer is triggered when being connected, and just has voltage input.Voltage rising edge is generated when there is input voltage VBUS input
Signal, forms corresponding trigger current Ilatch, and forward position phase-cut dimmer is triggered when conducting starts and carries out cut phase until half cycle
After phase, same operation is repeated.
The invention also discloses a kind of driving chip, rising edge trigger circuit, institute are integrated in the driving chip
Voltage rising edge signal of the rising edge trigger circuit for the forward position phase-cut dimmer start-up time after detecting rectification is stated, and is being examined
The rising edge trigger circuit start-up operation is triggered after measuring the voltage rising edge signal to control the forward position phase-cut dimming
Device enters on state, and closes after controlling the rising edge trigger circuit work preset time according to the voltage rising edge signal
It closes.When the lighting driving system using the rising edge trigger circuit without light modulator or including after along phase-cut dimmer when, institute
Rising edge trigger circuit is stated to be in close state.Specifically, the rising edge trigger circuit can using the utility model Fig. 2,
Rising edge trigger circuit described in Fig. 3 A- Fig. 3 C any embodiment.
With reference to Fig. 5, the configuration diagram of lighting driving system second embodiment described in the utility model.With shown in Fig. 4 A
Embodiment the difference is that, lighting driving system described in the present embodiment using driving chip 55 substitute driver 45.Institute
It states driving chip 55 to be connected in parallel between the first output end and second output terminal of the rectifier bridge stack 42, be integrated in driving chip 55
There is rising edge trigger circuit 551, the rising edge trigger circuit 551 is connected in parallel on the first output end and of the rectifier bridge stack 42
Between two output ends；When the phase-cut dimmer 41 is forward position phase-cut dimmer, the rising edge trigger circuit 551 is for examining
The voltage rising edge signal of forward position phase-cut dimmer start-up time after surveying rectification, and detecting the voltage rising edge signal
After trigger the rising edge trigger circuit 551 and start to work and enter on state, and root to control the forward position phase-cut dimmer
It is closed after controlling the work of rising edge trigger circuit 551 preset time according to the voltage rising edge signal.When the cut phase tune
Light device 41 be after along phase-cut dimmer when, the rising edge trigger circuit 551 is in close state.Forward position phase-cut dimmer is with after
It may each comprise in lighting driving system along phase-cut dimmer, or external components as AC power source (for example, set
Set on wall) it does not include in lighting driving system.
Optionally, rising edge trigger circuit 551 can pass through the voltage rising edge of the input voltage VBUS after detection rectification
Signal or by detection load 46 both ends voltage rising edge signal, come trigger work with control forward position phase-cut dimmer 41 into
Enter on state.Specifically, the rising edge trigger circuit 551 can use the utility model Fig. 2, any reality of Fig. 3 A- Fig. 3 C
Apply rising edge trigger circuit described in example.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
Art personnel can also make several improvements and modifications without departing from the principle of this utility model, these improvements and modifications
Also it should be regarded as the protection scope of the utility model.
Claims (15)
1. a kind of rising edge trigger circuit, which is characterized in that cut in the forward position that the rising edge trigger circuit is used to detect after rectification
The voltage rising edge signal of phase light modulator start-up time, and the rising edge is triggered after detecting the voltage rising edge signal
Trigger circuit, which is started to work, enters on state to control the forward position phase-cut dimmer, and according to the voltage rising edge signal
It is closed after controlling the rising edge trigger circuit work preset time.
2. rising edge trigger circuit as described in claim 1, which is characterized in that the rising edge trigger circuit includes rising edge
Detection and switch control unit, current limiting unit and switch；
The rising edge detection and switch control unit, for first input end for detecting the voltage rising edge signal, second is defeated
Enter end ground connection, output end is electrically connected the control terminal of the switch；
The current limiting unit be electrically connected to after connect with the switch rising edge detect and switch control unit it is first defeated
Enter between end and ground；
The rising edge detection and switch control unit control the switch conduction after detecting the voltage rising edge signal,
And it is closed after according to the voltage rising edge signal controlling the switch conduction preset time.
3. rising edge trigger circuit as claimed in claim 2, which is characterized in that the rising edge detection and switch control unit
Including concatenated first capacitor and first resistor, the switch uses power MOS pipe；
The first end of the first capacitor is for detecting the voltage rising edge signal, the second end electrical connection of the first capacitor
The first end of the first resistor, the second end ground connection of the first resistor, the public affairs of the first capacitor and the first resistor
End is electrically connected the grid end of the power MOS pipe altogether；
The power MOS pipe is electrically connected between the first end and ground of the first capacitor after connecting with the current limiting unit；
Wherein, in the forward position phase-cut dimmer start-up time, after the first capacitor detects the voltage rising edge signal
It starts to charge, charging current flows through the first resistor and generates the pressure drop control power MOS pipe conducting, to control the forward position
Phase-cut dimmer enters on state, closes after the power MOS pipe conducting preset time.
4. rising edge trigger circuit as claimed in claim 3, which is characterized in that when the turn-on time of the power MOS pipe is
Between constant (1/ (R1*C1)), wherein R1 be the first resistor resistance value, C1 be the first capacitor capacitance.
5. rising edge trigger circuit as claimed in claim 3, which is characterized in that the capacitance of the first capacitor is 0.1-
0.9nF。
6. rising edge trigger circuit as claimed in claim 3, which is characterized in that the turn-on time of the power MOS pipe is 100
~300us.
7. rising edge trigger circuit as claimed in claim 3, which is characterized in that the current limiting unit includes second resistance, institute
The first end for stating second resistance is electrically connected to the first end of the first capacitor, described in the second end electrical connection of the second resistance
The drain electrode of power MOS pipe, the source electrode ground connection of the power MOS pipe；The resistance value of the first resistor is 10-100K Ω, described the
The resistance value of two resistance is 1-9K Ω.
8. rising edge trigger circuit as claimed in claim 7, which is characterized in that the current limiting unit further comprises third electricity
Resistance, the first end of the 3rd resistor are electrically connected the source electrode of the power MOS pipe, the second end ground connection of the 3rd resistor；Institute
The resistance value for stating 3rd resistor is 10-100 Ω.
9. rising edge trigger circuit as claimed in claim 3, which is characterized in that the current limiting unit further comprises third electricity
The first end electrical connection of resistance, the 3rd resistor is electrically connected with the source electrode of the power MOS pipe, the other end of the 3rd resistor
Second end is electrically connected ground connection with the other end of rectifier bridge；The resistance value of the first resistor is 3rd resistor described in 10-100K Ω
Resistance value is 10-100 Ω.
10. rising edge trigger circuit as claimed in claim 3, which is characterized in that the rising edge detection and switch control list
Member further comprises clamp diode, rectifier diode and the second capacitor；
The clamp diode, anode are electrically connected the second end of the first capacitor, minus earth；
The rectifier diode, anode are electrically connected the second end of the first capacitor, and cathode is electrically connected the first resistor simultaneously
First end, the first end of second capacitor and the grid end of the power MOS pipe；
The second end of second capacitor is grounded, and the capacitance of second capacitor is greater than the capacitance of the first capacitor；
Wherein, in the forward position phase-cut dimmer start-up time, after the first capacitor detects the voltage rising edge signal,
The first capacitor and second capacitor start simultaneously at charging, and the charging current of the first capacitor flows through the first resistor
It generates pressure drop and controls the power MOS pipe conducting, the charging current of second capacitor is to maintain the first resistor both ends
Pressure drop, close after power MOS pipe conducting preset time.
11. rising edge trigger circuit as claimed in claim 10, which is characterized in that the turn-on time of the power MOS pipe is
Time constant (1/ (R1*C2)), wherein R1 is the resistance value of the first resistor, and C2 is the capacitance of second capacitor.
12. a kind of lighting driving system, including rectifier bridge stack, leadage circuit, driver and load, the of the rectifier bridge stack
One input terminal accesses the positive output end of AC power source, the second input terminal electrical connection of the rectifier bridge stack by phase-cut dimmer
The inverse output terminal of the AC power source, the input voltage after the first output end output rectification of the rectifier bridge stack are described whole
The second output terminal ground connection of bridge heap is flowed, the leadage circuit, driver and load are connected in parallel on the first of the rectifier bridge stack
Between output end and second output terminal；It is characterized in that,
The lighting driving system further includes rising edge trigger circuit, and the rising edge trigger circuit is connected in parallel on the rectifier bridge stack
The first output end and second output terminal between；When the phase-cut dimmer is forward position phase-cut dimmer, the rising edge touching
Power Generation Road is used to detect the voltage rising edge signal of the forward position phase-cut dimmer start-up time after rectification, and detecting
The rising edge trigger circuit start-up operation is triggered after stating voltage rising edge signal to control the forward position phase-cut dimmer entrance
On state, and closed after controlling the rising edge trigger circuit work preset time according to the voltage rising edge signal；When
The phase-cut dimmer be after along phase-cut dimmer when, the rising edge trigger circuit is in close state.
13. lighting driving system as claimed in claim 12, which is characterized in that the rising edge trigger circuit further uses
Rising edge trigger circuit described in claim 2-11 any one.
14. a kind of driving chip, which is characterized in that be integrated with the described in any item of claim 2-11 in the driving chip
Rising edge trigger circuit, the rising edge trigger circuit are used to detect the voltage of the forward position phase-cut dimmer start-up time after rectification
Rising edge signal, and trigger the rising edge trigger circuit after detecting the voltage rising edge signal and start to work to control
The forward position phase-cut dimmer enters on state, and controls the rising edge trigger circuit according to the voltage rising edge signal
It is closed after work preset time.
15. a kind of lighting driving system, including rectifier bridge stack, leadage circuit, driving chip and load, the rectifier bridge stack
First input end accesses the positive output end of AC power source by phase-cut dimmer, and the second input terminal of the rectifier bridge stack is electrically connected
The inverse output terminal of the AC power source is connect, the input voltage after the first output end output rectification of the rectifier bridge stack is described
The second output terminal of rectifier bridge stack is grounded, and the leadage circuit, driving chip and load are connected in parallel on the rectifier bridge stack
Between first output end and second output terminal；It is characterized in that,
Described in any item rising edge trigger circuits of claim 2-11, the rising edge touching are integrated in the driving chip
Power Generation Road is connected in parallel between the first output end of the rectifier bridge stack and second output terminal；When the phase-cut dimmer is cut for forward position
When phase light modulator, the rising edge trigger circuit is used to detect the voltage of the forward position phase-cut dimmer start-up time after rectification
Rising edge signal, and trigger the rising edge trigger circuit after detecting the voltage rising edge signal and start to work to control
The forward position phase-cut dimmer enters on state, and controls the rising edge trigger circuit according to the voltage rising edge signal
It is closed after work preset time；When after the phase-cut dimmer being along phase-cut dimmer, the rising edge trigger circuit is in
Closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821144031.4U CN208386961U (en) | 2018-07-19 | 2018-07-19 | Rising edge trigger circuit, driving chip and lighting driving system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821144031.4U CN208386961U (en) | 2018-07-19 | 2018-07-19 | Rising edge trigger circuit, driving chip and lighting driving system |
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| CN208386961U true CN208386961U (en) | 2019-01-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385934A (en) * | 2019-12-26 | 2020-07-07 | 宁波凯耀电器制造有限公司 | Silicon controlled rectifier Bleeder circuit of adjusting luminance |
| CN115942545A (en) * | 2022-12-16 | 2023-04-07 | 珠海市圣昌电子有限公司 | Phase-cut dimmer maintaining current circuit and compatible EMC control circuit |
-
2018
- 2018-07-19 CN CN201821144031.4U patent/CN208386961U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385934A (en) * | 2019-12-26 | 2020-07-07 | 宁波凯耀电器制造有限公司 | Silicon controlled rectifier Bleeder circuit of adjusting luminance |
| CN111385934B (en) * | 2019-12-26 | 2022-01-07 | 宁波凯耀电器制造有限公司 | Silicon controlled rectifier Bleeder circuit of adjusting luminance |
| CN115942545A (en) * | 2022-12-16 | 2023-04-07 | 珠海市圣昌电子有限公司 | Phase-cut dimmer maintaining current circuit and compatible EMC control circuit |
| CN115942545B (en) * | 2022-12-16 | 2023-07-21 | 珠海市圣昌电子有限公司 | Phase-cut dimmer holding current circuit and compatible EMC control circuit |
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