CN202310225U - LED lamp tube driving circuit applicable to bracket lamp with backup power supply - Google Patents

LED lamp tube driving circuit applicable to bracket lamp with backup power supply Download PDF

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Publication number
CN202310225U
CN202310225U CN2011204252268U CN201120425226U CN202310225U CN 202310225 U CN202310225 U CN 202310225U CN 2011204252268 U CN2011204252268 U CN 2011204252268U CN 201120425226 U CN201120425226 U CN 201120425226U CN 202310225 U CN202310225 U CN 202310225U
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China
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resistance
diode
module
light modulation
output
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CN2011204252268U
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陶伟洪
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ME Electronic Products Ltd
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ME Electronic Products Ltd
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Abstract

The utility model discloses an LED lamp tube driving circuit applicable to a bracket lamp with a backup power supply. The LED lamp tube driving circuit applicable to the bracket lamp with the backup power supply comprises a high-frequency rectifying and filtering module, a working mode detecting module, a light-dimming constant-current driving module and an LED light source module which are mutually connected. Compared with the prior art, the LED lamp tube driving circuit applicable to the bracket lamp with the backup power supply changes a mains supply rectifying and filtering circuit in an LED fluorescent lamp tube circuit into a high-frequency rectifying and filtering circuit and changes non-light-dimming constant-current driving into light-dimming constant-current driving, and a working mode detecting circuit is provided, so that when the backup power supply is used for supplying power to the bracket lamp or a sign plate or the like, the LED light source module can work normally in an emergency lighting mode, and thus the service life of the LED light source module and the service life of the bracket lamp or the sign plate are prolonged; and the energy is saved and the environment is protected.

Description

Be applicable to the LED lamp tube drive circuit of back-up source Frame lamp
Technical field
The utility model relates to back-up source Frame lamp circuit engineering field, relates in particular to a kind of LED lamp tube drive circuit that is applicable to the back-up source Frame lamp.
Background technology
At present, for guaranteeing personal safety, generally Frame lamp or indication plate are installed in the places such as corridor, escape truck and fire safety passage of commercial mansion.Said Frame lamp or indication plate belong to the emergency lighting product with back-up source powering mode.
This Frame lamp or indication plate general work be in the altar lamp state, and be in normal illumination and emergency lighting two states.When adopting civil power that said Frame lamp or indication plate are supplied power, it is in the normal illumination pattern; When adopting back-up source that said Frame lamp or indication plate are supplied power, it is in the emergency lighting pattern.As shown in Figure 1; The circuit of existing Frame lamp or indication plate comprises lamp bracket and fluorescent tube 14 two parts; Said lamp bracket partly comprises civil power outage detection and conversion, battery charging module 10, backup battery 13, Inductive ballast 11, starter 12, said backup battery 13, Inductive ballast 11; Starter 12 and fluorescent tube 14 all are connected with module 10, and said lamp bracket is inserted by said civil power outage detection and conversion, battery charging module 10 in the mains electricity input end.Because this Frame lamp uses the conventional fluorescent lamps pipe, power consumption is big, and lamp tube service life is short, is unfavorable for energy-conserving and environment-protective.
Along with the continuous development of science and technology, the LED lamp with its have the life-span long, low in energy consumption, energy-saving effect is obvious etc., and characteristics are widely used.As shown in Figure 2, for LED being applied to the block diagram of LED fluorescent tube.As shown in the figure, said LED fluorescent tube is made up of commercial power rectification filter circuit 20, not light modulation constant-current drive circuit 21, led light source 22, and the mains electricity input end is inserted by said commercial power rectification filtration module 20.But only consider low frequency (less than 1KHz) when designing owing to this commercial power rectification filter circuit, consume does not seriously possess dimming function and supply voltage measuring ability again in addition during for the high frequency electric source rectifying and wave-filtering.When said LED fluorescent tube was used for the back-up source Frame lamp, mains-supplied can normally be lighted, and civil power outage back is less owing to the back-up source output power, and cisco unity malfunction can occur extinguishing or scintillation.
Therefore; Be necessary to provide a kind of improved LED lamp tube drive circuit that is applicable to the back-up source Frame lamp; When adopting said back-up source that product is supplied power with assurance; Led light source can normally work in the emergency lighting pattern, the constantly situation of flicker can not occur, thereby reaches the purpose of power saving, environmental protection, long service life.
The utility model content
The purpose of the utility model provides a kind of LED lamp tube drive circuit that is applicable to the back-up source Frame lamp; When adopting back-up source that Frame lamp or indication plate etc. is supplied power with assurance; The led light source module can normally work in the emergency lighting pattern; Thereby improve the useful life of said led light source module and said Frame lamp or indication plate, and energy-saving and environmental protection.
For realizing above-mentioned purpose; The utility model provides a kind of LED lamp tube drive circuit that is applicable to the back-up source Frame lamp; Comprise filtering high-frequency rectifier module, mode of operation detection module, light modulation constant-current driven module and led light source module; The input of said filtering high-frequency rectifier module is the tube lamp holder power interface of back-up source Frame lamp; The output of said filtering high-frequency rectifier module is connected respectively with the input of said mode of operation detection module, the power input of said light modulation constant-current driven module; The output of said mode of operation detection module is connected with said light modulation constant-current driven module, and the output of said light modulation constant-current driven module is connected with said led light source module.
Compared with prior art; Because the commercial power rectification filter circuit that the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp of the utility model will have now in the LED fluorescent tube circuit changes rectifier filter circuit into; Change not light modulation constant-current driving into the light modulation constant-current driving; And increased the mode of operation testing circuit, thereby when having guaranteed that the employing back-up source is supplied power to Frame lamp or indication plate etc., the led light source module can normally work in the emergency lighting pattern; Thereby improve the useful life of said led light source module and said Frame lamp or indication plate, and energy-saving and environmental protection.
Particularly; In a preferred embodiment of the utility model; Said mode of operation detection module comprises partial pressure unit, reference voltage unit and a comparator; One end of said partial pressure unit is connected with the input of the output of said filtering high-frequency rectifier module, said light modulation constant-current driven module, and the other end of said partial pressure unit is connected with the in-phase input end of said comparator, and an end of said reference voltage unit is connected with an output of said light modulation constant-current driven module; The other end of said reference voltage unit is connected with the inverting input of said comparator, and the output of said comparator is connected with said light modulation constant-current driven module through a resistance R 18.
Particularly; Said partial pressure unit comprises successively resistance R 13, R14 and the R17 of series connection each other; And the end after the series connection is connected with the output of said filtering high-frequency rectifier module, the power input of said light modulation constant-current driven module; The other end after the series connection is connected with the earth terminal of said comparator, and said resistance R 14 all is connected with the in-phase input end of said comparator with the interconnective end of R17.
Particularly; Said reference voltage unit comprises resistance R 19, diode D9, Dz1 and capacitor C 9; Resistance R 19 is connected with diode D9 each other; And the end after the series connection is connected with an output of said light modulation constant-current driven module, and the other end after the series connection is connected respectively with the inverting input of said comparator, diode Dz1 and capacitor C 9, said diode Dz1 and capacitor C 9 parallel connections; And the end after the parallel connection is connected with the inverting input of said comparator, and the other end after the parallel connection is connected with the earth terminal of said comparator.
In another preferred embodiment of the utility model; Said mode of operation detection module comprises resistance R 13, R14, R17 and diode Dz1; Said resistance R 13, R14 connect each other; And the end after the series connection is connected with the output of said filtering high-frequency rectifier module, the power input of said light modulation constant-current driven module, and the other end after the series connection is connected with said resistance R 17, diode Dz1, and said resistance R 17, diode Dz1 are parallel with one another; And the end after the parallel connection is connected with said light modulation constant-current driven module, resistance R 14, the other end ground connection after the parallel connection.
Particularly; Said filtering high-frequency rectifier module comprises protected location, rectifier bridge unit and filter unit; The input of said protected location is the tube lamp holder power interface of back-up source Frame lamp; The output of said protected location is connected with the input of said filter unit through said rectifier bridge unit, and the output of said filter unit is connected respectively with the input of said partial pressure unit and said light modulation constant-current driven module.
Particularly; Said protected location comprises fuse F1 and piezo-resistance Vz1; The end of said fuse F1 is connected with a power interface of the tube lamp holder of back-up source Frame lamp; The other end of said fuse F1 is connected respectively with said piezo-resistance Vz1, said rectifier bridge unit, and the end of said piezo-resistance Vz1 is another power interface of the tube lamp holder of back-up source Frame lamp, and the other end of said piezo-resistance Vz1 is connected with said rectifier bridge unit.
Particularly; Said rectifier bridge unit comprises diode D4, D5, D6 and D7; The anode of said diode D4 is connected respectively with the end of said fuse F1, piezo-resistance Vz1 and the negative electrode of diode D6; The negative electrode of said diode D4 is connected with negative electrode and the said filter unit of said diode D5; The anode of said diode D5 is connected respectively with another power interface of the tube lamp holder of said back-up source Frame lamp, the other end of piezo-resistance Vz1 and the negative electrode of said diode D7, and the anode of said diode D7 is connected respectively with anode and the said filter unit of said diode D6.
Particularly; Said filter unit comprises electrochemical capacitor CE1, CE2, differential mode inductance Ld2, common mode inductance T2, capacitor C 3A, C3 and resistance R 11, and said capacitor C 3A is connected with the end of said common mode inductance T2, and the end of said capacitor C 3A is connected with the negative electrode of said diode D4, D5; The other end of said capacitor C 3A is connected with the anode of said diode D6, D7; The other end of said common mode inductance T2 is connected with said electrochemical capacitor CE2, and said electrochemical capacitor CE1 and capacitor C 3 are parallel with one another, and the end ground connection after the parallel connection; The other end after the parallel connection is connected respectively with the end of said common mode inductance T2, electrochemical capacitor CE2; Said differential mode inductance Ld2 is parallelly connected with resistance R 11, and the end ground connection after the parallel connection, and the other end after the parallel connection is connected respectively with the end of said common mode inductance T2, electrochemical capacitor CE2.
Particularly; Said light modulation constant-current drive circuit comprises light modulation chip U1, metal-oxide-semiconductor Q1, transformer T1, voltage starting unit and RCD absorption circuit; The output of said mode of operation detection module is connected with the DIM pin of said light modulation chip U1 through a resistance R 18; The GATE pin of said light modulation chip U1 is connected with the G of said metal-oxide-semiconductor Q1 end; The D end of said metal-oxide-semiconductor Q1 is connected with the input of said transformer T1; The input of said voltage starting unit is connected with said filter unit, and the output of said voltage starting unit is connected with the power input of said light modulation chip U1, and the input of said transformer T1 also is connected to the RCD absorption circuit; The output of said transformer T1 is connected with said led light source module through a rectification circuit, and another output of said transformer T1 is connected with the power input of said light modulation chip U1, the power input of said comparator U2B through another rectification circuit.
Particularly; Said voltage starting unit comprises resistance R 5, the R6 of mutual series connection, and said RCD absorption circuit comprises resistance R 3, R4, capacitor C 4 and diode D2, and said resistance R 3 is parallel with one another with capacitor C 4; And the end after the parallel connection is connected with said resistance R 6, said transformer T1; The other end after the parallel connection is connected with an end of said resistance R 4, and the other end of said resistance R 4 is connected with the negative electrode of said diode D2, and the anode of said diode D2 is connected with said transformer T1.
Through following description and combine accompanying drawing, it is more clear that the utility model will become, and these accompanying drawings are used to explain the embodiment of the utility model.
Description of drawings
Fig. 1 is existing back-up source Frame lamp structured flowchart.
Fig. 2 is existing LED lamp works theory diagram.
Fig. 3 is applicable to the block diagram of LED lamp tube drive circuit one embodiment of back-up source Frame lamp for the utility model.
Fig. 4 is the circuit diagram of Fig. 3.
Fig. 5 is applicable to the block diagram of another embodiment of LED lamp tube drive circuit of back-up source Frame lamp for the utility model.
Fig. 6 is the circuit diagram of Fig. 5.
Embodiment
With reference now to accompanying drawing, describe the embodiment of the utility model, the similar elements label is represented similar elements in the accompanying drawing.As stated; The utility model provides a kind of LED lamp tube drive circuit that is applicable to the back-up source Frame lamp; Because the commercial power rectification filter circuit that the said LED lamp tube drive circuit that is applicable to the back-up source Frame lamp will have now in the LED fluorescent tube circuit changes rectifier filter circuit into, changes not light modulation constant-current driving into the light modulation constant-current driving, and has increased the mode of operation testing circuit; Thereby when having guaranteed that the employing back-up source is supplied power to Frame lamp or indication plate etc.; The led light source module can normally work in the emergency lighting pattern, thereby improves the useful life of said led light source module and said Frame lamp or indication plate, and energy-saving and environmental protection.
Please refer to Fig. 3 and Fig. 4; One embodiment of the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp of the utility model comprises filtering high-frequency rectifier module 30, mode of operation detection module 32, light modulation constant-current driven module 34 and led light source module 36; The input of said filtering high-frequency rectifier module 30 links to each other with tube lamp holder; The output of said filtering high-frequency rectifier module 30 is connected respectively with the input of said operational module detection module 32, the input of said light modulation constant-current driven module 34; The output of said mode of operation detection module 32 is connected with an output of said light modulation constant-current driven module 34, and another output of said light modulation constant-current driven module 34 is connected with said led light source module 36.
Wherein, Said filtering high-frequency rectifier module 30 is used for carrying out rectifying and wave-filtering to civil power (220V, 50Hz) and through high frequency (greater than the 10KHz) pulse power of back-up source inversion; Make it become level and smooth DC high-voltage power supply to offer said operational module detection module 32 and light modulation constant-current driven module 34 as operating voltage; Said mode of operation detection module 32 is used for to external world supply voltage and discerns that the power supply of entire product is civil power or stand-by power supply under the current state to detect; And output control signal work in normal illumination or emergency lighting pattern to control said light modulation constant-current driven module 34, said light modulation constant-current driven module 34 is used for to said led light source module 36 working power being provided.
Wherein, Said mode of operation detection module 32 comprises partial pressure unit 321, reference voltage unit 322 and a comparator U2B; One end of said partial pressure unit 321 is connected with the input of the output of said filtering high-frequency rectifier module 30, said light modulation constant-current driven module 34; The other end of said partial pressure unit 321 is connected with the in-phase input end (5 pin) of said comparator U2B; One end of said reference voltage unit 322 is connected with an output of said light modulation constant-current driven module 34; The other end of said reference voltage unit 322 is connected with the inverting input (6 pin) of said comparator U2B, and the power input of said comparator U2B (8 pin) is connected with an output of said light modulation constant-current driven module 34, and the output of said comparator U2B (7 pin) is connected with said light modulation constant-current driven module 34 through a resistance R 18.Wherein, Said reference voltage unit 322 is used for to said comparator U2B reference voltage source being provided; Said partial pressure unit 321 is used for the supply voltage that comes from filtering high-frequency rectifier module 30 is carried out offering said comparator U2B after the dividing potential drop, and it is compared with said reference voltage source.
Particularly; Said partial pressure unit 321 comprises successively resistance R 13, R14 and the R17 of series connection each other; And the end after the series connection is connected respectively with the output of said filtering high-frequency rectifier module 30, the input of said light modulation constant-current driven module 34; The other end after the series connection is connected with the earth terminal (4 pin) of said comparator U2B, and said resistance R 14 all is connected with the in-phase input end (5 pin) of said comparator U2B with the interconnective end of R17.
Particularly; Said reference voltage unit 322 comprises resistance R 19, diode D9, Dz1 and capacitor C 9; Resistance R 19 is connected with diode D9 each other; And the end after the series connection is connected with an output of said light modulation constant-current driven module 34, and the other end after the series connection is connected said diode Dz1 and capacitor C 9 parallel connections respectively with inverting input (6 pin), the diode Dz1 of said comparator U2B with capacitor C 9; And the end after the parallel connection is connected with the inverting input of said comparator U2B (6 pin), and the other end after the parallel connection is connected with the earth terminal (4 pin) of said comparator U2B.
Particularly; Said filtering high-frequency rectifier module 30 comprises protected location 301, rectifier bridge unit 302 and filter unit 303; The input of said protected location 201 is the power interface of the tube lamp holder of back-up source Frame lamp; The output of said protected location 301 is connected with the input of said filter unit 303 through said rectifier bridge unit 302, and the output of said filter unit 303 is connected respectively with the resistance R 13 of said partial pressure unit 321 and the input VHD of said light modulation constant-current driven module 34.
Particularly; Said protected location 301 comprises fuse F1 and piezo-resistance Vz1; The end of said fuse F1 is connected with a power interface (A, B end) of the tube lamp holder of back-up source Frame lamp; The other end of said fuse F1 is connected respectively with said piezo-resistance Vz1, said rectifier bridge unit 302; The end of said piezo-resistance Vz1 is connected with another power interface (C, D end) of the tube lamp holder of back-up source Frame lamp, and the other end of said piezo-resistance Vz1 is connected with said rectifier bridge unit 302.
Particularly; Said rectifier bridge unit 302 comprises diode D4, D5, D6 and D7; The anode of said diode D4 is connected respectively with the end of said fuse F1, piezo-resistance Vz1 and the negative electrode of diode D6; The negative electrode of said diode D4 is connected with negative electrode and the said filter unit 303 of said diode D5; The anode of said diode D5 is connected respectively with another power interface (C, D end) of the tube lamp holder of said back-up source Frame lamp, the other end of piezo-resistance Vz1 and the negative electrode of said diode D7, and the anode of said diode D7 is connected respectively with anode and the said filter unit 303 of said diode D6.
Particularly; Said filter unit 303 comprises electrochemical capacitor CE1, CE2, differential mode inductance Ld2, common mode inductance T2, capacitor C 3A, C3 and resistance R 11, and said capacitor C 3A is connected with the end of said common mode inductance T2, and the end of said capacitor C 3A is connected with the negative electrode of said diode D4, D5; The other end of said capacitor C 3A is connected with the anode of said diode D6, D7; The other end of said common mode inductance T2 is connected with said electrochemical capacitor CE2, and said electrochemical capacitor CE1 and capacitor C 3 are parallel with one another, and the end ground connection after the parallel connection; The other end after the parallel connection is connected respectively with the end of said common mode inductance T2, electrochemical capacitor CE2; Said differential mode inductance Ld2 is parallelly connected with resistance R 11, and the end ground connection after the parallel connection, and the other end after the parallel connection is connected respectively with the end of said common mode inductance T2, electrochemical capacitor CE2.
Particularly; Said light modulation constant-current drive circuit 34 comprises light modulation chip U1, metal-oxide-semiconductor Q1, transformer T1, voltage starting unit 341 and RCD absorption circuit 342; The output of said comparator U2B (7 pin) is connected with the DIM pin of said light modulation chip U1 through a resistance R 18; Said DIM pin is through a capacitor C 8 ground connection; The GATE pin of said light modulation chip U1 is connected with the G end of said metal-oxide-semiconductor Q1 through resistance R 10, the diode D8 rectifier circuit of forming parallel with one another; The output of said metal-oxide-semiconductor Q1 is connected with the CS pin of said light modulation chip U1; And through resistance R parallel with one another 15, R16 ground connection; The D end of said metal-oxide-semiconductor Q1 is connected with the input (winding 2 pin) of said transformer T1, and the input of said voltage starting unit 241 is connected with the output of said filter unit 303, and the output of said voltage starting unit 341 is connected the input of said transformer T1 and is connected to the RCD absorption circuit with the power input of said light modulation chip U1; The output of said transformer T1 (winding Ns1 end) is connected with said led light source module 36 through a rectification circuit 1, and another output of said transformer T1 (winding 3,4 pin) is connected with the power input (VCC end) of said light modulation chip U1, the power input (8 pin) of said comparator U2B through another rectification circuit 2.The induced voltage that winding 3,4 pin of said transformer T1 are produced is used to provide the operating voltage of said comparator U2B and said light modulation chip U1.
Wherein, Said rectification circuit 1 comprises capacitor C 1, C2, resistance R 1A, R1, R2 diode D1, D1A and electrochemical capacitor C5; Said resistance R 1A, R1 are parallel with one another, and the end after the parallel connection is connected through the end of said capacitor C 1 with the winding Ns1 end of said transformer T1, and the other end after the parallel connection is connected with the other end that the winding Ns1 of said transformer T1 holds through said electrochemical capacitor C5; Said diode D1, D1A are parallel with one another; And the end after the parallel connection is connected with said capacitor C 1, and the other end after the parallel connection is connected with said capacitor C 2, resistance R 2 and led light source module 36, and said capacitor C 2 is parallel with one another with resistance R 2; And the end after the end after the parallel connection and said diode D1, the D1A parallel connection is connected, and the other end after the parallel connection is connected with the other end, the said led light source module 36 of the winding Ns1 end of said transformer T1.
Said rectification circuit 2 comprises the resistance R 7 and diode D3 of mutual series connection; One end of said resistance R 7 is connected with the resistance R 19 of said reference voltage unit 322; And capacitor C 7, R12 ground connection through a resistance R 8 and series connection each other; The end of said diode D3 is connected with the power input (VCC end) of the power input of said comparator U2B (8 pin), said light modulation chip U1, and through a capacitor C 6 ground connection.
Particularly; Said voltage starting unit 341 comprises resistance R 5, the R6 of mutual series connection; Said RCD absorption circuit 342 comprises resistance R 3, R4, capacitor C 4 and diode D2; Said resistance R 3 is parallel with one another with capacitor C 4, and the end after the parallel connection is connected with said resistance R 6, said transformer T1 (winding 1 pin), and the other end after the parallel connection is connected with an end of said resistance R 4; The other end of said resistance R 4 is connected with the negative electrode of said diode D2, and the anode of said diode D2 is connected with said transformer T1 (winding 2 pin).Said voltage starting unit 341 is used to the starting resistor that provides said light modulation chip for driving U1 to start working, and said RCD absorption circuit 342 is used to absorb the high pressure of said transformer T1.
Preferably; Since led light source have energy-conservation obviously, advantage such as the life-span is long, therefore, said led light source module 36 adopts LED as illuminating source; Adopt other illuminating sources compared with traditional led light source module 36, energy-conservation more and useful life of having improved entire product.
The utility model is applicable to that the operation principle of LED lamp tube drive circuit of back-up source Frame lamp is following: when the said LED lamp tube drive circuit that is applicable to the back-up source Frame lamp is started working; Civil power or through the high frequency pulse power supply of back-up source inversion behind said filtering high-frequency rectifier module 30 rectifying and wave-filterings; The high direct voltage of output smoothing; Said high direct voltage is input to the in-phase input end (5 pin) of said comparator U2B after said partial pressure unit 321 dividing potential drops; The reference voltage that said comparator U2B will come from said reference voltage unit 322 with compare from the voltage of partial pressure unit 321; And output control signal work in normal illumination or emergency lighting pattern to control said light modulation constant-current driven module 34, said light modulation constant-current driven module 34 is used for to said led light source module 36 working power being provided.When power supply is civil power (AC power of 220V, 50Hz); Direct voltage behind its rectifying and wave-filtering is greater than 250V; Said comparator U2B output this moment high level signal; Control said light modulation constant-current driven module 34 and work in 100% brightness and carry out normal illumination, thereby the operating current that works in normal illumination is provided to said led light source module 36; When power supply is high frequency (greater than the 10KHz) pulse power through the back-up source inversion; Its output power is much smaller than mains-supplied power; Direct voltage behind its rectifying and wave-filtering is less than 250V; Said comparator U2B output LOW voltage signal was controlled said light modulation constant-current driven module 34 and was worked in 20% left and right sides brightness and carry out emergency lighting, thereby to said led light source module 36 operating current that works in emergency lighting is provided this moment.
Please refer to Fig. 5 and Fig. 6, for the utility model is applicable to another embodiment of the LED lamp tube drive circuit of back-up source Frame lamp, annexation and operation principle thereof in this enforcement between each element are similar to the above embodiments, repeat no more at this.The difference of itself and the foregoing description is: said mode of operation detection module 32 comprises resistance R 13, R14, R17 and diode Dz1; Said resistance R 13, R14 connect each other; And the end after the series connection is connected with the output of said filtering high-frequency rectifier module 30, the power input of said light modulation constant-current driven module 34; The other end after the series connection is connected with said resistance R 17, diode Dz1; Said resistance R 17, diode Dz1 are parallel with one another, and the end after the parallel connection is connected the other end ground connection after the parallel connection with said light modulation constant-current driven module 34, resistance R 14.In the present embodiment, said mode of operation detection module 32 carries out light modulation for light modulation constant-current driven module 34 for the voltage of filtering high-frequency rectifier module 30 outputs through simple dividing potential drop, and this example is equally applicable to the Frame lamp of back-up source power supply.
More than combine most preferred embodiment that the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to the essence of the utility model.

Claims (10)

1. LED lamp tube drive circuit that is applicable to the back-up source Frame lamp; It is characterized in that: comprise filtering high-frequency rectifier module, mode of operation detection module, light modulation constant-current driven module and led light source module; The input of said filtering high-frequency rectifier module is the tube lamp holder power interface of back-up source Frame lamp; The output of said filtering high-frequency rectifier module is connected respectively with the input of said mode of operation detection module, the power input of said light modulation constant-current driven module; The output of said mode of operation detection module is connected with said light modulation constant-current driven module, and the output of said light modulation constant-current driven module is connected with said led light source module.
2. the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp as claimed in claim 1; It is characterized in that: said mode of operation detection module comprises partial pressure unit, reference voltage unit and a comparator; One end of said partial pressure unit is connected with the power input of the output of said filtering high-frequency rectifier module, said light modulation constant-current driven module; The other end of said partial pressure unit is connected with the in-phase input end of said comparator; One end of said reference voltage unit is connected with an output of said light modulation constant-current driven module; The other end of said reference voltage unit is connected with the inverting input of said comparator, and the output of said comparator is connected with said light modulation constant-current driven module through a resistance R 18.
3. the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp as claimed in claim 2; It is characterized in that: said partial pressure unit comprises successively resistance R 13, R14 and the R17 of series connection each other; And the end after the series connection is connected with the output of said filtering high-frequency rectifier module, the power input of said light modulation constant-current driven module; The other end after the series connection is connected with the earth terminal of said comparator, and said resistance R 14 all is connected with the in-phase input end of said comparator with the interconnective end of R17.
4. the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp as claimed in claim 2; It is characterized in that: said reference voltage unit comprises resistance R 19, diode D9, Dz1 and capacitor C 9; Resistance R 19 is connected with diode D9 each other; And the end after the series connection is connected with an output of said light modulation constant-current driven module, and the other end after the series connection is connected respectively with the inverting input of said comparator, diode Dz1 and capacitor C 9, said diode Dz1 and capacitor C 9 parallel connections; And the end after the parallel connection is connected with the inverting input of said comparator, and the other end after the parallel connection is connected with the earth terminal of said comparator.
5. the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp as claimed in claim 1; It is characterized in that: said mode of operation detection module comprises resistance R 13, R14, R17 and diode Dz1; Said resistance R 13, R14 connect each other; And the end after the series connection is connected with the output of said filtering high-frequency rectifier module, the power input of said light modulation constant-current driven module, and the other end after the series connection is connected with said resistance R 17, diode Dz1, and said resistance R 17, diode Dz1 are parallel with one another; And the end after the parallel connection is connected with said light modulation constant-current driven module, resistance R 14, the other end ground connection after the parallel connection.
6. like each described LED lamp tube drive circuit that is applicable to the back-up source Frame lamp of claim 2-5; It is characterized in that: said filtering high-frequency rectifier module comprises protected location, rectifier bridge unit and filter unit; The input of said protected location is the tube lamp holder power interface of back-up source Frame lamp; The output of said protected location is connected with the input of said filter unit through said rectifier bridge unit, and the output of said filter unit is connected respectively with the power input of said partial pressure unit and said light modulation constant-current driven module.
7. the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp as claimed in claim 6; It is characterized in that: said protected location comprises fuse F1 and piezo-resistance Vz1; The end of said fuse F1 is connected with a power interface of the tube lamp holder of back-up source Frame lamp; The other end of said fuse F1 is connected respectively with said piezo-resistance Vz1, said rectifier bridge unit; The end of said piezo-resistance Vz1 is another power interface of the tube lamp holder of back-up source Frame lamp, and the other end of said piezo-resistance Vz1 is connected with said rectifier bridge unit; Said rectifier bridge unit comprises diode D4, D5, D6 and D7; The anode of said diode D4 is connected respectively with the end of said fuse F1, piezo-resistance Vz1 and the negative electrode of diode D6; The negative electrode of said diode D4 is connected with negative electrode and the said filter unit of said diode D5; The anode of said diode D5 is connected respectively with another power interface of the tube lamp holder of back-up source Frame lamp, the other end of piezo-resistance Vz1 and the negative electrode of said diode D7, and the anode of said diode D7 is connected respectively with anode and the said filter unit of said diode D6.
8. the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp as claimed in claim 7; It is characterized in that: said filter unit comprises electrochemical capacitor CE1, CE2, differential mode inductance Ld2, common mode inductance T2, capacitor C 3A, C3 and resistance R 11; Said capacitor C 3A is connected with the end of said common mode inductance T2; And the end of said capacitor C 3A is connected with the negative electrode of said diode D4, D5, and the other end of said capacitor C 3A is connected with the anode of said diode D6, D7, and the other end of said common mode inductance T2 is connected with said electrochemical capacitor CE2; Said electrochemical capacitor CE1 and capacitor C 3 are parallel with one another; And the end ground connection after the parallel connection, the other end after the parallel connection is connected respectively with the end of said common mode inductance T2, electrochemical capacitor CE2, and said differential mode inductance Ld2 is parallelly connected with resistance R 11; And the end ground connection after the parallel connection, the other end after the parallel connection is connected respectively with the end of said common mode inductance T2, electrochemical capacitor CE2.
9. like each described LED lamp tube drive circuit that is applicable to the back-up source Frame lamp of claim 2-5; It is characterized in that: said light modulation constant-current drive circuit comprises light modulation chip U1, metal-oxide-semiconductor Q1, transformer T1, voltage starting unit and RCD absorption circuit; The output of said mode of operation detection module is connected with the DIM pin of said light modulation chip U1 through a resistance R 18; The GATE pin of said light modulation chip U1 is connected with the G of said metal-oxide-semiconductor Q1 end; The D end of said metal-oxide-semiconductor Q1 is connected with the input of said transformer T1; The input of said voltage starting unit is connected with said filter unit; The output of said voltage starting unit is connected with the power input of said light modulation chip U1; The input of said transformer T1 also is connected to the RCD absorption circuit, and the output of said transformer T1 is connected with said led light source module through a rectification circuit, and another output of said transformer T1 is connected with the power input of said light modulation chip U1, the power input of said comparator U2B through another rectification circuit.
10. the LED lamp tube drive circuit that is applicable to the back-up source Frame lamp as claimed in claim 9; It is characterized in that: said voltage starting unit comprises resistance R 5, the R6 of mutual series connection; Said RCD absorption circuit comprises resistance R 3, R4, capacitor C 4 and diode D2; Said resistance R 3 is parallel with one another with capacitor C 4, and the end after the parallel connection is connected with said resistance R 6, said transformer T1, and the other end after the parallel connection is connected with an end of said resistance R 4; The other end of said resistance R 4 is connected with the negative electrode of said diode D2, and the anode of said diode D2 is connected with said transformer T1.
CN2011204252268U 2011-10-31 2011-10-31 LED lamp tube driving circuit applicable to bracket lamp with backup power supply Expired - Fee Related CN202310225U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102510622A (en) * 2011-10-31 2012-06-20 玮滔环保产品有限公司 LED (Light Emitting Diode) light tube driving circuit suitable for backup power supply fixture lamp
WO2014101767A1 (en) * 2012-12-31 2014-07-03 Shenzhen Byd Auto R&D Company Limited Switching power source, method and control chip for controlling the same
CN104519624A (en) * 2013-09-30 2015-04-15 深圳市海洋王照明工程有限公司 Anti-interference circuit and lamp

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102510622A (en) * 2011-10-31 2012-06-20 玮滔环保产品有限公司 LED (Light Emitting Diode) light tube driving circuit suitable for backup power supply fixture lamp
CN102510622B (en) * 2011-10-31 2014-04-16 玮滔环保产品有限公司 LED (Light Emitting Diode) light tube driving circuit suitable for backup power supply fixture lamp
WO2014101767A1 (en) * 2012-12-31 2014-07-03 Shenzhen Byd Auto R&D Company Limited Switching power source, method and control chip for controlling the same
CN103917001A (en) * 2012-12-31 2014-07-09 比亚迪股份有限公司 Switching power supply, control method for switching power supply, and control chip
CN103917001B (en) * 2012-12-31 2016-12-28 比亚迪股份有限公司 Switching Power Supply, the control method of Switching Power Supply and control chip
US9543846B2 (en) 2012-12-31 2017-01-10 Byd Company Limited Switching power source, method and control chip for controlling the same
CN104519624A (en) * 2013-09-30 2015-04-15 深圳市海洋王照明工程有限公司 Anti-interference circuit and lamp

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