CN104735873B - A kind of change-over circuit and lamp of compatible fluorescent lamp ballast - Google Patents
A kind of change-over circuit and lamp of compatible fluorescent lamp ballast Download PDFInfo
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 17
- 230000006641 stabilisation Effects 0.000 claims description 15
- 238000011105 stabilization Methods 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000005669 field effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 101100468543 Caenorhabditis elegans drag-1 gene Proteins 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The invention discloses a kind of change-over circuit of compatible fluorescent lamp ballast, including rectification module, handover module, LED drive module；The rectification module output end is connected with the input of described handover module；The output end of the handover module is connected with the input of the LED drive module；The rectification module, it is used to the alternating current of external power source being converted to direct current and exported；The handover module carries out impedance switching, increases the equiva lent impedance of the change-over circuit when the magnitude of voltage that rectification module is exported is less than pre-set threshold value.The invention also discloses a kind of LED of compatible fluorescent lamp ballast, include the change-over circuit of LED module and above-mentioned compatible fluorescent lamp ballast, the output end of the LED drive module is connected with the LED module.The present invention completely compatible can directly connect the 1 of electric and existing fluorescent lamp using the LED of change-over circuit and drag 1 formula and 1 multi-split ballast, and the light fixture has design simple efficient, replaces convenient, cost is low.
Description
Technical field
The present invention relates to lighting device technical field, be specifically related to a kind of compatible fluorescent lamp ballast change-over circuit and
Lamp.
Background technology
With the popularization of contemporary LED illumination, LED initially enters the family expenses epoch, but the fluorescent lamp of family expenses is usually glimmering
Light lamp, this kind of light fixture is typically equipped with inductance type, electronic ballast, and LED daylight lamp typically can not compatible such lamp to this
The ballast of tool, this just brings trouble to installation and replacement, needs to dismantle when mounted and change wiring, once LED is bad
Fall, can not be connected again with conventional fluorescent it is emergent, to using and replacement brings trouble
In the prior art, LED lamp device in the presence of some compatible fluorescent lamp ballasts, but can only accomplish that compatibility 1 is dragged
When can not directly connect electricity during multimodal ballast, and can directly connect electricity can not compatible 1 multi-split ballast, this be accomplished by it is a can be complete
Portion's compatibility directly connects the device of electric and compatible 1 multi-split ballast.
The content of the invention
It is of the invention that in order to overcome at least one of above-mentioned prior art defect or deficiency, there is provided a kind of energy, all compatibility is direct
Connect the change-over circuit of electric and compatible 1 multi-split ballast.
In order to solve the above technical problems, technical scheme is as follows：
A kind of change-over circuit of compatible fluorescent lamp ballast, including rectification module, handover module, LED drive module；It is described
Rectification module output end is connected with the input of described handover module；The output end of the handover module drives with the LED
The input connection of module；The rectification module, it is used to the alternating current of external power source being converted to direct current and exported；It is described
Handover module carries out impedance switching, increases the change-over circuit when the magnitude of voltage that rectification module is exported is less than pre-set threshold value
Equiva lent impedance.
Further, the handover module includes linear voltage stabilization module, voltage detection module, self-locking switching control module；
The linear voltage stabilization module is connected with the rectification module, and it is used for the output voltage progress to the rectification module
Conversion, is that the voltage detection module and self-locking switching control module provide operating voltage；The voltage detection module with it is described
Rectification module is connected, and trigger signal is generated when the magnitude of voltage that the rectification module is exported is less than pre-set threshold value, and triggering is believed
Number transmit to the self-locking switching control module；The self-locking switching control module, it is used for according to the trigger signal received
Impedance switching is carried out, increases the equiva lent impedance of the change-over circuit.
Further, the self-locking switching control module includes self-locking control unit and impedance switch unit；The impedance is cut
Changing unit includes big resistance unit, small resistor unit and state switch, and the resistance of the small resistor unit is much smaller than big
The resistance of resistance unit；The small resistor unit connects to form impedance handoff leg with state switch；The impedance switching
Branch road is in parallel with big resistance unit；The self-locking control unit is used to switch the logical of switch according to the trigger signal state of a control
It is disconnected.
Further, the state switch is photo-coupler (U1), and the photo-coupler (U1) includes photodiode
And phototriode；The photodiode, its anode is connected with the self-locking switching control module, its negative electrode connection ground connection electricity
Position；The phototriode, its colelctor electrode connects the output end of the photo-coupler, and its emitter stage connects the LED drivings mould
Block；The phototriode controls its conducting state by the photodiode.
Further, the voltage detection module includes the 7th resistance, the 8th resistance, the 9th resistance and controllable source of stable pressure.Institute
The 7th resistance, the 8th resistance and the 9th resistance is stated to be sequentially connected in series；One end ground connection of 9th resistance, the 9th resistance
The other end be connected with the reference pole of the controllable source of stable pressure；The plus earth of the controllable source of stable pressure, the controllable source of stable pressure
Negative electrode be connected with the self-locking switching control module.
Further, the self-locking switching unit includes the 13rd resistance, the 14th resistance, the 4th voltage-regulator diode and controllable
Silicon；One end of 13rd resistance connects with the negative electrode of the controllable source of stable pressure and the negative electrode of the 4th voltage-regulator diode respectively
Connect, the other end of the 13rd resistance is connected with the linear voltage stabilization module；The anode of 4th voltage-regulator diode and institute
State the control pole connection of controllable silicon；The anode of controllable silicon one end respectively with the 14th resistance and the photo-coupler
First input end connection；Second input of the negative electrode of the controllable silicon respectively with earth terminal and the photo-coupler is connected；
The other end of 14th resistance is connected with the linear voltage stabilization module.
Further, the linear voltage stabilization module includes the tenth resistance, the 11st resistance, the 12nd resistance, the first voltage stabilizing two
Pole pipe, the second voltage-regulator diode, the 3rd voltage-regulator diode, the first electric capacity and the first FET；First FET
Grid is connected with the negative pole of the first voltage-regulator diode, and the source electrode of first FET is another with the 13rd resistance respectively
One end, the other end of the 14th resistance and the connection of described first electric capacity one end, the drain electrode of first FET and the
The anode connection of two voltage-regulator diodes；The plus earth of first voltage-regulator diode, the negative electrode of first voltage-regulator diode
It is connected with one end of the 11st resistance；The other end of 11st resistance is connected with one end of the tenth resistance, the tenth electricity
The other end of resistance and the output end of rectification module are connected；The negative electrode of second voltage-regulator diode and the sun of the 3rd voltage-regulator diode
Pole is connected, and the negative electrode of the 3rd voltage-regulator diode is connected with one end of the 12nd resistance；The other end of 12nd resistance
It is connected with rectification module output end；The other end ground connection of first electric capacity.
Further, it is connected with the second field-effect between the output end and the LED drive module of the impedance switch unit
Pipe, the drain electrode of second FET is connected with the output end of impedance switch unit, the grid of second FET and
The negative electrode connection of first voltage-regulator diode, the source electrode of second FET is connected with the LED drive module.
Further, the LED drive module includes LED drive controls chip, the 5th voltage-regulator diode, the 3rd field-effect
Pipe, the 12nd diode, the 15th resistance, the 18th resistance, the 19th resistance, the 20th resistance and some resistance capacitances；Institute
State the source electrode and the moon of the 5th voltage-regulator diode of the internal electric source end of LED drive control chips respectively with second FET
Pole is connected；The plus earth of 5th voltage-regulator diode；Described 15th resistance one end and the LED drive controls chip
Input connection is enabled, the other end of the 15th resistance is connected with the linearity light adjusting end of the LED drive controls chip；Institute
The drive output for stating LED drive control chips is connected with one end of the 18th resistance and the 19th resistance；It is described
The other end of 18th resistance is connected with the negative electrode of the 12nd diode；The anode of 12nd diode respectively with institute
State the grid connection of the other end and the 3rd FET of the 19th resistance；One end of 20th resistance and described the
One end connection of 19 resistance；The other end of 20th resistance is controlled with the hunting of frequency of the LED drive controls chip
End connection.
All compatibility electric and compatible 1 multi-split ballast can be directly connect it is a further object to provide a kind of
LED, the modulated structure is simple, replaces convenient.
To achieve the above object, technical scheme is as follows：A kind of LED of compatible fluorescent lamp ballast, including
The change-over circuit of LED module and above-mentioned compatible fluorescent lamp ballast, the output end of the LED drive module and the LED module
Connection.
Beneficial effects of the present invention：The present invention completely compatible can directly connect electric and existing using the LED of change-over circuit
1 formula and 1 multi-split ballast are dragged in the 1 of fluorescent lamp, and the light fixture has operating efficiency high, replace convenient, without extracing ballast
Replace, so as to reduce cost.
Brief description of the drawings
Fig. 1 is the module diagram of the change-over circuit of compatible fluorescent lamp ballast；
Fig. 2 is the module of the change-over circuit of compatible fluorescent lamp ballast
Fig. 3 is self-locking switching control module schematic diagram；
Fig. 4 is the circuit diagram of the change-over circuit of compatible fluorescent lamp ballast；
Fig. 5 drags the schematic diagram of 2 formula ballasts for present invention access 1.
Embodiment
Some known features and its explanation may be omitted and will be understood by accompanying drawing to those skilled in the art.
Technical scheme is described further with specific embodiment below in conjunction with the accompanying drawings, but the present invention is not by institute
Specific embodiment is stated to be limited.
Specific embodiment 1
A kind of module diagram of the change-over circuit of compatible fluorescent lamp ballast as shown in Figure 1, including rectification module 06,
Handover module, LED drive module 05；The output end of rectification module 06 is connected with the input of described handover module；It is described
The output end of handover module is connected with the input of the LED drive module 05；The rectification module 06, it is used for external electrical
The alternating current in source is converted to direct current and exported；The handover module is less than pre-set threshold value in the magnitude of voltage that rectification module 06 is exported
When, impedance switching is carried out, increases the equiva lent impedance of the change-over circuit.
Handover module schematic diagram as shown in Figure 2, the handover module includes linear voltage stabilization module 03, voltage detection module
01st, self-locking switching control module；The linear voltage stabilization module 03 is connected with the rectification module 06, and it is used for the rectification mould
The output voltage of block 06 is changed, and is that the voltage detection module 01 and self-locking switching control module provide operating voltage；Institute
State voltage detection module 01 to be connected with the rectification module 06, the magnitude of voltage exported in the rectification module 06 is less than pre-set threshold value
Shi Shengcheng trigger signals, and trigger signal is transmitted to the self-locking switching control module；The self-locking switching control module, its
For carrying out impedance switching according to the trigger signal received, increase the equiva lent impedance of the change-over circuit.
Self-locking switching control module schematic diagram as shown in Figure 3, the self-locking switching control module is included from lock control list
Member 02 and impedance switch unit 04；The impedance switch unit 04 includes big resistance unit 402, small resistor unit 401 and shape
State switching switch, the resistance of the small resistor unit 401 is much smaller than the resistance of big resistance unit 402；The small resistor unit 401
Connect to form impedance handoff leg with state switch；The impedance handoff leg is in parallel with big resistance unit 402；It is described from
Lock control unit 02 is used to be switched on-off according to trigger signal state of a control switching.
It is further used as preferred embodiment, the state switch is photo-coupler (U1), the photo-coupler
(U1) photodiode and phototriode are included；The photodiode, its anode connects with the self-locking switching control module
Connect, its negative electrode connection earthing potential；The phototriode, its colelctor electrode connects the output end of the photo-coupler, and it is launched
Pole connects the LED drive module 05；The phototriode controls its conducting state by the photodiode.
It is further used as preferred embodiment, the circuit of the change-over circuit of compatible fluorescent lamp ballast as shown in Figure 4
Figure, the voltage detection module 01 includes the 7th resistance R7, the 8th resistance R8, the 9th resistance R9 and controllable source of stable pressure Q1.It is described
7th resistance R7, the 8th resistance R8 and the 9th resistance R9 are sequentially connected in series；One end ground connection of 9th resistance, the described 9th
The resistance R9 other end is connected with the reference pole of the controllable source of stable pressure Q1；The plus earth of the controllable source of stable pressure Q1, it is described
Controllable source of stable pressure Q1 negative electrode is connected with the self-locking switching control module.In the present embodiment, controllable source of stable pressure Q1 is used
TL431 chips, TL431 has good heat endurance, and 2.5V, the i.e. partial pressure when R9 two ends are set to reference to the reference voltage of pole
During less than setting value, the anode and negative electrode of TL431 chips switch to cut-off state.
It is further used as preferred embodiment, the circuit of the change-over circuit of compatible fluorescent lamp ballast as shown in Figure 4
Figure, the self-locking switching unit 02 includes the 13rd resistance R13, the 14th resistance R14, the 4th voltage-regulator diode ZD4 and controllable
Silicon Q2；The negative electrode and the 4th voltage-regulator diode of one end of the 13rd resistance R13 respectively with the controllable source of stable pressure Q1
ZD4 negative electrode connection, the other end of the 13rd resistance R13 is connected with linear voltage stabilization module 03；The pole of 4th voltage stabilizing two
Pipe ZD4 anode is connected with the control pole of the controllable silicon Q2；The anode of the controllable silicon Q2 respectively with the 14th resistance
R14 one end and the photo-coupler U1 first input end 1 are connected；The negative electrode of the controllable silicon Q2 respectively with earth terminal and institute
The second input 2 for stating photo-coupler U1 is connected；The other end of the 14th resistance R14 is connected with linear voltage stabilization module 03.
In the present embodiment, controllable silicon Q2 uses MCR16 chips, and MCR16 has the characteristic of sensitive triggering and well tolerable power, works as control
When the voltage of pole processed reaches trigger value, the conducting of MCR16 chip negative and positive the two poles of the earth.
It is further used as preferred embodiment, the circuit of the change-over circuit of compatible fluorescent lamp ballast as shown in Figure 4
Figure, the linear voltage stabilization module 03 includes the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the pole of the first voltage stabilizing two
Pipe ZD1, the second voltage-regulator diode ZD2, the 3rd voltage-regulator diode ZD3, the first electric capacity C1 and the first FET M1；Described first
FET M1 grid is connected with the first voltage-regulator diode ZD1 negative pole, the source electrode of the first FET M1 with it is described
First electric capacity C1 one end is connected, and the drain electrode of the first FET M1 is connected with the second voltage-regulator diode ZD2 anode；It is described
First voltage-regulator diode ZD1 plus earth, the negative electrode of the first voltage-regulator diode ZD1 and the 11st resistance R11 one end
Connection；The other end of the 11st resistance R11 is connected with the tenth resistance R10 one end, the other end of the tenth resistance R10
It is connected with the output end of rectification module 06；The negative electrode of the second voltage-regulator diode ZD2 and the 3rd voltage-regulator diode ZD3 anode
Connection, the negative electrode of the 3rd voltage-regulator diode ZD3 is connected with the 12nd resistance R12 one end；The 12nd resistance R12's
The other end is connected with the output end of rectification module 06；The other end ground connection of the first electric capacity C1.
It is further used as preferred embodiment, the circuit of the change-over circuit of compatible fluorescent lamp ballast as shown in Figure 4
Figure, is connected with the second FET M2 between the output end and the LED drive module 05 of the impedance switch unit 04, described
Second FET M2 drain electrode is connected with the output end of impedance switch unit 04, the grid of the second FET M2 and institute
The first voltage-regulator diode ZD1 negative electrode connection is stated, source electrode and the LED drive module 05 of the second FET M2 connect
Connect.
It is further used as preferred embodiment, the circuit of the change-over circuit of compatible fluorescent lamp ballast as shown in Figure 4
Figure, the LED drive module 05 includes LED drive control chips U2, the 5th voltage-regulator diode ZD5, the 3rd FET M3, the
12 diode D12, the 15th resistance R15, the 18th resistance R18, the 19th resistance R19, the 20th resistance R20 and some outer
Portion's resistance capacitance；The source electrodes of the internal electric source end VDD of the LED drive controls chip U2 respectively with the second FET M2
Connected with the 5th voltage-regulator diode ZD5 negative electrode；The plus earth of the 5th voltage-regulator diode ZD5；15th resistance
R15 one end is connected with the enable input PWM-D of the LED drive controls chip U2, the other end of the 15th resistance R15
It is connected with the linearity light adjusting end LD of the LED drive controls chip U2；The drive output of the LED drive controls chip U2
DRV is connected with the 18th resistance R18 and the 19th resistance R19 one end；The other end of the 18th resistance R18
It is connected with the negative electrode of the 12nd diode D12；The anode of the 12nd diode D12 respectively with the 19th resistance
The R19 other end and the 3rd FET M3 grid connection；One end and the described 19th of the 20th resistance R20
Resistance R19 one end connection；The hunting of frequency of the other end of the 20th resistance R20 and the LED drive controls chip U2
Control end is connected.In the present embodiment, LED drive module 05 uses HV9910 chips, and HV9910 has high efficiency drive LED spy
Property.Small resistor unit 401 is 1K Ω using two the resistance first resistor R1 connected, second resistance R2 resistances；Big resistance
Unit 402 is 33K Ω using four resistance R3, R4, R5, R6 series connection, wherein R3, R4, R5, and R6 is 15K Ω.This specific implementation
In example, the peripheral resistance capacitance of HV9910 chips also includes the 16th resistance R16, the 17th resistance R17, the 21st resistance
R21, the 22nd resistance R22, the 23rd resistance R23, the 24th resistance R24, the 25th resistance R25, the second electric capacity
C2 and the 3rd electric capacity C3.Described 16th resistance R16 one end is connected with the linearity light adjusting end LD of HV9910 chips, and the described 16th
The resistance R16 other ends are connected with the earth terminal GND of the HV9910 chips, the 17th resistance R17 and the 3rd electric capacity
C3 is connected in parallel with the 16th resistance R16.Described 21st resistance R21 one end and the frequency of the HV9910 chips
The Rosc connections of vibrational control end, the other end ground connection of the 21st resistance R21.Described 22nd resistance R22 one end with
The current sample input CS connections of the HV9910 chips, the 22nd resistance R22 other ends ground connection；Described 20th
Three resistance R23 and the 24th resistance R24 are connected in parallel with the 22nd resistance R22.25th electricity
Resistance R25 one end is connected with the internal electric source end VDD of the HV9910 chips, the other end of the 25th resistance R25 and institute
State the second FET M2 source electrode connection.The second electric capacity C2 is connected in parallel with the 5th voltage-regulator diode ZD.
As a preferred embodiment, the circuit diagram of the change-over circuit of compatible fluorescent lamp ballast as shown in Figure 4,
The rectification module 06 includes two bridge rectifiers 601 and filter circuit 602.
Described two bridge rectifiers 601 include the first diode D1 to the tenth diode D10, the bridge rectifier electricity
The output end on road is connected with the filter circuit.
The filter circuit 602 includes the 4th electric capacity C4, the first electrochemical capacitor EC1, the second electrochemical capacitor EC2 and first and become
Depressor LF1；The 4th electric capacity C4 and the first electrochemical capacitor EC1 are connected in the input of the first transformer LF1 in parallel；Institute
The output end for stating the first transformer LF1 is connected with the second electrochemical capacitor EC2, and the output end of the first transformer LF1 is
The output end of rectification module.
Specific embodiment 2：
A kind of LED of compatible fluorescent lamp ballast, includes the change-over circuit of LED module and compatible fluorescent lamp ballast,
The output end of the LED drive module 05 is connected with the LED module.
The output end of HV9910 chips is connected with LED.
The main switch working state and linear working state for using HV9910 chips in the present embodiment.The switch
State refers to when the internal electric source end VDD of HV9910 chips voltage is more than VDD undervoltage lockout voltage threshold UVLO, drives defeated
Go out to hold DRV to export high level, now output current by way of limiting outside 3rd FET M3 peak point current working.
The linear working state refer to when the linearity light adjusting end LD of HV9910 chips voltage be less than 250mV when,
HV9910 chips continuously adjust LED output current to control LED's bright by linearity light adjusting end LD linear voltage regulation mode
Degree.
When the LED of the present embodiment directly connects electricity, electric current enters voltage detecting mould through bridge rectifier and filter circuit
Block 01, now the partial pressure at R9 two ends is more than 2.5V, and TL431 chips Q1 is in the conduction state, and the 4th voltage-regulator diode ZD4 is in anti-
To cut-off state, MCR16 chips Q2 is not triggered, in cut-off state so that photo-coupler U1 is in the conduction state, big resistance
Unit access circuit in parallel with small resistor unit, the second FET M2 causes the internal electric source end VDD of HV9910 driving chips
Voltage is maintained at 12V, and HV9910 driving chips are in switch working state.
Common LED lamp is connected in series, due to the power of two LEDs when 2 formula ballast is dragged in access 1 during two LEDs
Constant and have difference, according to formula, the voltage of the bigger LED of power is bigger, causes its equivalent resistance to increase, further leads
Cause its voltage to continue to increase, ultimately result in the imbalance of circuit, it is impossible to normal work.
The schematic diagram of 2 formula ballasts is dragged in present invention access 1 as shown in Figure 5, and the LED of the present embodiment drags 2 formulas in access 1
During ballast, when the partial pressure that circuit input voltage is reduced to R9 two ends is less than setting value 2.5V, TL431 chips Q1, which is switched to, to be cut
Only state, the node voltage rise between TL431 chips Q1 and the 13rd resistance R13, cause the 4th voltage-regulator diode ZD4 anti-
To puncturing, so as to trigger MCR16 chips Q2 conductings, the photodiode in photo-coupler U1 is caused to be short-circuited, photo-coupler U1
Switch to cut-off state, small resistor unit：First resistor R1 and second resistance R2 series arms are to be switched off, and access the electricity of circuit
Resistance only has big resistance unit, so that the impedance rise of circuit, and then cause the voltage rise of circuit.Now due to HV9910
The internal electric source end VDD of chip voltage is less than after 12V, the partial pressure by the 15th resistance R15, the linear tune of HV9910 chips
Light end LD voltage is less than 250mV, and HV9910 chips enter linear working state, reached by the trimming circuit of HV9910 chips
Balance so that LED can be with normal work.
Position relationship is used for being given for example only property explanation described in accompanying drawing, it is impossible to be interpreted as the limitation to this patent.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Any modifications, equivalent substitutions and improvements made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (2)
1. a kind of change-over circuit of compatible fluorescent lamp ballast, it is characterised in that including rectification module (06), handover module, LED
Drive module (05)；Rectification module (06) output end is connected with the input of described handover module；The handover module
Output end be connected with the input of the LED drive module (05)；The rectification module (06), it is used for external power source
Alternating current is converted to direct current and exported；The handover module is less than pre-set threshold value in the magnitude of voltage that rectification module (06) is exported
When, impedance switching is carried out, increases the equiva lent impedance of the change-over circuit；
The handover module includes linear voltage stabilization module (03), voltage detection module (01), self-locking switching control module；
The linear voltage stabilization module (03) is connected with the rectification module (06), and it is used for the output to the rectification module (06)
Voltage is changed, and is that the voltage detection module (01) and self-locking switching control module provide operating voltage；
The voltage detection module (01) is connected with the rectification module (06), the magnitude of voltage exported in the rectification module (06)
Trigger signal is generated during less than pre-set threshold value, and trigger signal is transmitted to the self-locking switching control module；
The self-locking switching control module, it is used to carry out impedance switching according to the trigger signal received, increases the conversion
The equiva lent impedance of circuit；
The self-locking switching control module includes self-locking control unit (02) and impedance switch unit (04)；
The impedance switch unit (04) includes small resistor unit (401), big resistance unit (402) and state switch,
The resistance of the small resistor unit (401) is much smaller than the resistance of big resistance unit (402)；
The small resistor unit (401) is connected to form impedance handoff leg with state switch；
The impedance handoff leg is in parallel with big resistance unit (402)；
The self-locking control unit (02) is used to be switched on-off according to trigger signal state of a control switching；
The state switch is photo-coupler (U1), and the photo-coupler (U1) includes photodiode and photosensitive three pole
Pipe；The photodiode, its anode is connected with the self-locking control unit (02), its negative electrode connection earthing potential；The light
Quick triode, its colelctor electrode connects the small resistor unit, and its emitter stage connects the LED drive module (05)；It is described photosensitive
Triode controls its conducting state by the photodiode；
The voltage detection module (01) includes the 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9) and controllable voltage stabilizing
Source (Q1)；
7th resistance (R7), the 8th resistance (R8) and the 9th resistance (R9) are sequentially connected in series in rectification module (06) with connecing
Between ground terminal；
One end ground connection of 9th resistance (R9), the other end of the 9th resistance (R9) and the controllable source of stable pressure (Q1)
With reference to pole connection；
The plus earth of the controllable source of stable pressure (Q1), negative electrode and the self-locking switching of the controllable source of stable pressure (Q1) control mould
Block is connected；
The self-locking control unit (02) includes the 13rd resistance (R13), the 14th resistance (R14), the 4th voltage-regulator diode
And controllable silicon (Q2) (ZD4)；
One end of 13rd resistance (R13) negative electrode respectively with the controllable source of stable pressure (Q1) and the pole of the 4th voltage stabilizing two
The negative electrode connection of (ZD4) is managed, the other end of the 13rd resistance (R13) is connected with linear voltage stabilization module (03)；
The anode of 4th voltage-regulator diode (ZD4) is connected with the control pole of the controllable silicon (Q2)；
The anode of the controllable silicon (Q2) respectively with one end of the 14th resistance (R14) and the photo-coupler (U1)
One input (1) is connected；
The negative electrode of the controllable silicon (Q2) is connected with earth terminal respectively；
The other end of 14th resistance (R14) is connected with the linear voltage stabilization module (03)；
The linear voltage stabilization module (03) includes the tenth resistance (R10), the 11st resistance (R11), the 12nd resistance (R12), the
One voltage-regulator diode (ZD1), the second voltage-regulator diode (ZD2), the 3rd voltage-regulator diode (ZD3), the first electric capacity (C1) and first
FET (M1)；
The grid of first FET (M1) is connected with the negative pole of the first voltage-regulator diode (ZD1), first field-effect
Manage the other end, the other end of the 14th resistance (R14) and institute of the source electrode of (M1) respectively with the 13rd resistance (R13)
State the connection of the first electric capacity (C1) one end, the drain electrode of first FET (M1) and the anode of the second voltage-regulator diode (ZD2)
Connection；
The plus earth of first voltage-regulator diode (ZD1), the negative electrode of first voltage-regulator diode (ZD1) and the 11st electricity
Hinder one end connection of (R11)；
The other end of 11st resistance (R11) is connected with one end of the tenth resistance (R10), the tenth resistance (R10)
The other end is connected with the output end of rectification module (06)；
The negative electrode of second voltage-regulator diode (ZD2) is connected with the anode of the 3rd voltage-regulator diode (ZD3), the 3rd voltage stabilizing
The negative electrode of diode (ZD3) is connected with one end of the 12nd resistance (R12)；
The other end of 12nd resistance (R12) is connected with rectification module (06) output end；
The other end ground connection of first electric capacity (C1)；
The second FET (M2) is connected between the impedance switch unit (04) and the LED drive module (05), it is described
The drain electrode of second FET (M2) is connected with the output end of impedance switch unit (04), the grid of second FET (M2)
Pole is connected with the negative electrode of first voltage-regulator diode (ZD1), and source electrode and the LED of second FET (M2) drive
Module (05) is connected；
The LED drive module (05) includes LED drive controls chip (U2), the 5th voltage-regulator diode (ZD5), the 3rd field-effect
Manage (M3), the 12nd diode (D12), the 15th resistance (R15), the 18th resistance (R18), the 19th resistance (R19), second
Ten resistance (R20) and some resistance capacitances；
The source electrode of the internal electric source end (VDD) of the LED drive controls chip (U2) respectively with second FET (M2)
Connected with the negative electrode of the 5th voltage-regulator diode (ZD5)；The plus earth of 5th voltage-regulator diode (ZD5)；
Described 15th resistance (R15) one end is connected with the enable input (PWM-D) of the LED drive controls chip (U2),
The other end of 15th resistance (R15) is connected with the linearity light adjusting end (LD) of the LED drive controls chip (U2)；
The drive output (DRV) of the LED drive controls chip (U2) and the 18th resistance (R18) and the described 19th
One end connection of resistance (R19)；The other end of 18th resistance (R18) and the negative electrode of the 12nd diode (D12)
Connection；
The anode of 12nd diode (D12) respectively with the other end of the 19th resistance (R19) and described 3rd
The grid connection of effect pipe (M3)；
One end of 20th resistance (R20) is connected with one end of the 19th resistance (R19)；20th resistance
(R20) the other end is connected with the hunting of frequency control end (Rosc) of the LED drive controls chip (U2).
2. a kind of LED of compatible fluorescent lamp ballast, including LED module, it is characterised in that also including described in claim 1
Change-over circuit, the output end of the LED drive module (05) is connected with the LED module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119079.4A CN104735873B (en) | 2015-03-18 | 2015-03-18 | A kind of change-over circuit and lamp of compatible fluorescent lamp ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119079.4A CN104735873B (en) | 2015-03-18 | 2015-03-18 | A kind of change-over circuit and lamp of compatible fluorescent lamp ballast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104735873A CN104735873A (en) | 2015-06-24 |
| CN104735873B true CN104735873B (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510119079.4A Expired - Fee Related CN104735873B (en) | 2015-03-18 | 2015-03-18 | A kind of change-over circuit and lamp of compatible fluorescent lamp ballast |
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