CN110557868B - Lamp tube compatible with high frequency and power frequency and implementation method thereof - Google Patents
Lamp tube compatible with high frequency and power frequency and implementation method thereof Download PDFInfo
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- CN110557868B CN110557868B CN201910886488.5A CN201910886488A CN110557868B CN 110557868 B CN110557868 B CN 110557868B CN 201910886488 A CN201910886488 A CN 201910886488A CN 110557868 B CN110557868 B CN 110557868B
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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
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- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention discloses a lamp tube compatible with high frequency and power frequency, which comprises a safety protection circuit, a rectifying circuit, an LED driving circuit, an electronic ballast driving circuit A, a leakage current detection protection circuit B1 and a field IC driving circuit B2, wherein the safety protection circuit is respectively connected with an input end L and an input end N, and is also respectively connected with the rectifying circuit, the leakage current detection protection circuit B1 and the electronic ballast driving circuit A, and the rectifying circuit is connected with the field IC driving circuit B2; the invention also discloses a realization method of the lamp tube compatible with high frequency and power frequency, and the invention ensures the safety of the lamp tube in the disassembly and assembly process by arranging the leakage current detection and protection circuit B1 because the lamp tube is powered on from two ends; according to the invention, the field IC driving circuit B2 is arranged, so that unnecessary harmonic components in the rectified current are filtered, and the constant current is oscillated and output through the field IC and a peripheral circuit thereof.
Description
Technical Field
The invention belongs to the technical field of LED lamp tubes, and particularly relates to an LED lamp tube compatible with high-frequency electronic ballasts and power frequency alternating current application and an implementation method thereof.
Background
At present, the LED lamp tube in the market has a plurality of types, but when in use, the use method is different according to different principles: has the use of direct replacement of compatible ballasts; the ballast is also required to be used after trimming; and different lamps need to be matched with different lamp holders to be used normally, and a customer without related expertise can hardly find out which lamp holder is in the lamp, so that the lamp can be matched with the existing lamp without knowing how to purchase the lamps, and the situation that the lamps are not lighted or are damaged by misuse easily occurs.
Disclosure of Invention
The invention aims to provide a lamp tube compatible with high frequency and power frequency so as to solve the problems in the background technology. The lamp tube compatible with high frequency and power frequency has the characteristics of being compatible with a high-frequency electronic ballast and double-end power frequency alternating current.
The invention also aims to provide a realization method of the lamp tube compatible with high frequency and power frequency.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a fluorescent tube that can compatible high frequency and power frequency, including the safety protection circuit, rectifier circuit, LED drive circuit, electronic ballast drive circuit A, leakage current detection protection circuit B1 and field IC drive circuit B2, wherein, the safety protection circuit is connected with input L and input N respectively, the safety protection circuit still is connected with rectifier circuit, leakage current detection protection circuit B1 and electronic ballast loop circuit A respectively, rectifier circuit is connected with field IC drive circuit B2, leakage current detection protection circuit B1 is connected with LED drive circuit, electronic ballast drive circuit A is connected with LED drive circuit, LED drive circuit still is connected with output LED+ and output LED respectively.
In the invention, the safety protection circuit comprises a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a piezoresistor RV1, wherein the input end of the temperature fuse F1 is connected with an input end L, the input end of the temperature fuse F2 is connected with an input end N, the output end of the temperature fuse F1 is connected with the input end of the fuse resistor FR1, the output end of the fuse resistor FR1 is respectively connected with a rectifying circuit and a leakage current detection protection circuit B1, and the output end of the temperature fuse F2 is respectively connected with the rectifying circuit and an electronic ballast driving circuit A.
In the invention, the rectifying circuit comprises a diode DS1, a diode DS2, a diode DS3 and a diode DS4, wherein the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are sequentially connected end to form a first bridge rectifying module, the input end of the first bridge rectifying module is connected with the safety protection circuit, the positive electrode of the output end of the first bridge rectifying module is connected with the input bus end of the field IC driving circuit B2, and the negative electrode of the output end of the first bridge rectifying module is a loop ground wire GND.
In the invention, the LED driving circuit comprises an electrolysis CE1 and a resistor RS1, wherein the electrolysis CE1 is connected with the resistor RS1 in parallel, the anode of the electrolysis CE1 is respectively connected with the output end LED+ and the field IC driving circuit B2, and the cathode of the electrolysis CE1 is respectively connected with the output end LED-, the field IC driving circuit B2 and the electronic ballast circuit A.
In the invention, the electronic ballast driving circuit a comprises a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage stabilizing tube Z1 and a MOS tube Q1, wherein the diode DS7 and the diode DS8 form a second bridge rectifier module, the detection capacitor CS4 is respectively connected with a temperature fuse F2 and the second bridge rectifier module, the second bridge rectifier module is respectively connected with the capacitor CS3, the resistor RS12 and the voltage stabilizing tube Z1 in parallel, the D electrode of the MOS tube Q1 is respectively connected with the cathode of the electrolytic CE1 and the field IC driving circuit B2, the S electrode of the MOS tube Q1 is connected with a loop ground wire GND, and the G electrode of the MOS tube Q1 is connected with one end of the voltage stabilizing tube Z1.
In the present invention, the leakage current detection protection circuit B1 includes a diode DS6, a resistor RS7, a resistor RS8, a resistor RS9, a resistor RS10, a resistor RS11, a capacitor CS1, and a chip U2, where the positive electrode of the diode DS6 is connected to the fuse resistor FR1, the positive electrode of the diode DS6 is further connected in series with the resistor RS8, the resistor RS9, and the resistor RS10, the negative electrode of the diode DS6 is connected in series with the resistor RS6 and the resistor RS7, the other end of the resistor RS7 is connected to the 8 pin of the chip U2, the 6 pin of the chip U2 is connected to the resistor RS9, the resistor RS10 is connected to the 2 pin of the chip U2 with the capacitor CS1, the 1 pin of the chip U2 is connected to the resistor RS11, one end of the resistor RS11 and the 5 pin of the chip U2 are connected to the loop ground GND, the other end of the resistor RS11 is connected to the resistor RS10, and the 4 pin of the chip U2 is connected to the field IC driving circuit B2.
In the present invention, the field IC driving circuit B2 includes an inductor L1, a capacitor C2, a chip U1, a resistor RS2, a resistor RS3, a resistor RS4, a diode DS5, a capacitor CS2, a resistor RS5, and an inductor T1, where the inductor L1, the capacitor C1, and the capacitor C2 form pi-shaped filtering, one end of the diode DS5 is connected to the inductor L1, the 5 pin of the chip U1 is connected to the other end of the diode DS5, the capacitor CS2 is connected to the diode DS5 in parallel after being connected to the resistor RS5 in series, one end of the resistor RS5 is connected to the inductor T1, the 3 pin of the chip U1 is connected to the capacitor C2, the 1 pin of the chip U1 is connected to the resistor RS2, the other end of the resistor RS2 is connected to the capacitor C2, the 7 pin of the chip U1 is connected to the resistor RS3, the resistor RS4 is connected to the resistor RS3 in parallel, and one end is grounded.
In the invention, the realization method of the lamp tube compatible with high frequency and power frequency comprises the following steps:
firstly, when an arc discharge phenomenon occurs under the application of an electronic ballast through the arranged temperature fuse F1 and temperature fuse F2, the risk of burning a lamp tube and even fire caused by arc discharge is avoided, and the abnormal risk of a product under the condition of overcurrent and overvoltage can be avoided through the arranged fuse resistor FR1 and the piezoresistor RV 1;
secondly, rectifying the input power frequency alternating current or the high-frequency alternating current output by the electronic ballast through the arrangement of a rectifying circuit;
thirdly, filtering the current output by the front stage through the electrolysis CE1, outputting the filtered current to the LED lamp tube, driving the LED to emit light, discharging the electric quantity on the electrolysis CE1 after the product is powered off through the resistor RS1, and ensuring that the lamp tube is extinguished quickly;
fourthly, by arranging the detection capacitor CS4, the characteristic of passing high frequency and low frequency through the capacitor is utilized to switch into a matched loop under different use environments; rectifying the detected current by arranging a second bridge rectifier module; the capacitor CS3 is arranged to stabilize the detection voltage, so that the detection voltage is stable and is not disturbed; through setting a resistor RS12, discharging the electric quantity on a capacitor CS3, consuming leakage current during power frequency alternating current input, and ensuring that the MOS tube Q1 is protected from breakdown under the condition of poor contact of the power frequency alternating current input; the voltage stabilizing tube Z1 is used for limiting the detection voltage value, so that the detection signal is ensured to be normally input to the G pole of the MOS tube Q1; by arranging the MOS tube Q1, the electronic ballast circuit forms a circuit, the D electrode of the MOS tube Q1 is connected with the LED driving circuit 3, the S electrode of the MOS tube Q1 is connected with the circuit ground GND, the power frequency alternating current circuit is short-circuited, and the electronic ballast circuit is ensured to work normally;
fifthly, by arranging the leakage current detection protection circuit B1, the safety of the lamp tube in the disassembly and assembly process is ensured because the lamp tube is powered on from two ends;
and sixthly, filtering out unnecessary harmonic components in the rectified current by arranging a field IC driving circuit B2, and oscillating and outputting constant current through the field IC and a peripheral circuit thereof.
In the invention, the safety protection circuit comprises a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a piezoresistor RV1, wherein the input end of the temperature fuse F1 is connected with an input end L, the input end of the temperature fuse F2 is connected with an input end N, the output end of the temperature fuse F1 is connected with the input end of the fuse resistor FR1, the output end of the fuse resistor FR1 is respectively connected with a rectifying circuit and a leakage current detection protection circuit B1, the output end of the temperature fuse F2 is respectively connected with the rectifying circuit and an electronic ballast driving circuit A, the rectifying circuit comprises a diode DS1, a diode DS2, a diode DS3 and a diode DS4, the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are sequentially connected in an end-to-end mode to form a first bridge rectifying module, the input end of the first bridge rectifying module is connected with the safety protection circuit, the positive electrode of the output end of the first bridge rectifier module is connected with the input bus end of the field IC driving circuit B2, the negative electrode of the output end of the first bridge rectifier module is a loop ground wire GND, the LED driving circuit comprises an electrolysis CE1 and a resistor RS1, wherein the electrolysis CE1 is connected in parallel with the resistor RS1, the positive electrode of the electrolysis CE1 is respectively connected with the LED+ of the output end and the field IC driving circuit B2, the negative electrode of the electrolysis CE1 is respectively connected with the LED-, the field IC driving circuit B2 and the electronic ballast loop A, the electronic ballast driving circuit A comprises a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage stabilizing tube Z1 and a MOS tube Q1, the diode DS7 and the diode DS8 form a second bridge rectifier module, the detection capacitor CS4 is respectively connected with a temperature fuse F2 and the second bridge rectifier module, and the second bridge rectifier module is respectively connected with a capacitor CS3, the resistor RS12 is connected in parallel with the voltage stabilizing tube Z1, the D pole of the MOS tube Q1 is respectively connected with the cathode of the electrolysis CE1 and the solid IC driving circuit B2, the S pole of the MOS tube Q1 is connected with the loop ground wire GND, the G pole of the MOS tube Q1 is connected with one end of the voltage stabilizing tube Z1, the leakage current detection protection circuit B1 comprises a diode DS6, a resistor RS7, a resistor RS8, a resistor RS9, a resistor RS10, a resistor RS11, a capacitor CS1 and a chip U2, wherein the anode of the diode DS6 is connected with the fuse resistor FR1, the anode of the diode DS6 is also respectively connected with a resistor RS8, a resistor RS9 and a resistor RS10 in series, the cathode of the diode DS6 is connected with the resistor RS7 in series, the other end of the resistor RS7 is connected with the 8 pin of the chip U2, the 6 pin of the chip U2 is connected with the resistor RS9, the resistor RS10 is connected with the 2 pin of the chip U2, the 1 pin of the chip U2 is connected with the resistor RS11, one end of a resistor RS11 and a 5 pin of a chip U2 are connected with a loop ground GND, the other end of the resistor RS11 is connected with a resistor RS10, a 4 pin of the chip U2 is connected with a solid IC driving circuit B2, the solid IC driving circuit B2 comprises an inductor L1, a capacitor C2, the chip U1, a resistor RS2, a resistor RS3, a resistor RS4, a diode DS5, a capacitor CS2, a resistor RS5 and an inductor T1, wherein the inductor L1, the capacitor C1 and the capacitor C2 form pi-type filtering, the 4 pin of the chip U1 and one end of the diode DS5 are connected with the inductor L1, the 5 pin of the chip U1 is connected with the other end of the diode DS5, the capacitor CS2 is connected with the diode DS5 in parallel after being connected with the resistor RS5 in series, one end of the resistor RS5 is connected with the inductor T1, the 3 pin of the chip U1 is connected with the capacitor C2, the 1 pin of the resistor RS2 is connected with the capacitor C2, the 7 pin of the chip U1 is connected with the resistor RS3 in parallel with the resistor RS3, and one end is grounded.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the arranged temperature fuse F1 and temperature fuse F2, when an arc discharge phenomenon occurs under the application of the electronic ballast, the risk of burning a lamp tube and even fire disaster caused by arc discharge is avoided, and through the arranged fuse resistor FR1 and piezoresistor RV1, the abnormal risk of a product under the condition of overcurrent and overvoltage can be avoided;
2. according to the invention, through the arrangement of the rectifying circuit, the input power frequency alternating current or the high-frequency alternating current output by the electronic ballast is rectified;
3. according to the invention, through setting the electrolysis CE1, the current output by the front stage is filtered and output to the LED lamp tube, the LED is driven to emit light, and through setting the resistor RS1, the electric quantity on the electrolysis CE1 is discharged after the product is powered off, so that the lamp tube is ensured to be extinguished rapidly;
4. according to the invention, the detection capacitor CS4 is arranged, and the characteristic of passing high frequency and low frequency through the capacitor is utilized to switch into a matched loop under different use environments; rectifying the detected current by arranging a second bridge rectifier module; the capacitor CS3 is arranged to stabilize the detection voltage, so that the detection voltage is stable and is not disturbed; through setting a resistor RS12, discharging the electric quantity on a capacitor CS3, consuming leakage current during power frequency alternating current input, and ensuring that the MOS tube Q1 is protected from breakdown under the condition of poor contact of the power frequency alternating current input; the voltage stabilizing tube Z1 is used for limiting the detection voltage value, so that the detection signal is ensured to be normally input to the G pole of the MOS tube Q1; by arranging the MOS tube Q1, the electronic ballast circuit forms a circuit, the D electrode of the MOS tube Q1 is connected with the LED driving circuit 3, the S electrode of the MOS tube Q1 is connected with the circuit ground GND, the power frequency alternating current circuit is short-circuited, and the electronic ballast circuit is ensured to work normally;
5. according to the invention, the leakage current detection protection circuit B1 is arranged, so that the safety of the lamp tube in the disassembly and assembly process is ensured because the lamp tube is powered on from two ends;
6. according to the invention, the field IC driving circuit B2 is arranged, so that unnecessary harmonic components in the rectified current are filtered, and the constant current is oscillated and output through the field IC and a peripheral circuit thereof.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of a leakage current detection protection circuit according to the present invention;
FIG. 3 is a schematic diagram of a rectifying circuit according to the present invention;
FIG. 4 is a schematic diagram of a leakage current detection protection circuit according to the present invention;
FIG. 5 is a schematic diagram of a field IC driver circuit according to the present invention;
FIG. 6 is a schematic diagram of an electronic ballast circuit of the present invention;
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-6, the present invention provides the following technical solutions: the utility model provides a fluorescent tube that can compatible high frequency and power frequency, including safety protection circuit 1, rectifier circuit 2, LED drive circuit 3, electronic ballast drive circuit A, leakage current detection protection circuit B1 and field IC drive circuit B2, wherein, safety protection circuit 1 is connected with input L and input N respectively, safety protection circuit 1 still is connected with rectifier circuit 2, leakage current detection protection circuit B1 and electronic ballast circuit A respectively, rectifier circuit 2 is connected with field IC drive circuit B2, leakage current detection protection circuit B1 is connected with LED drive circuit 3, electronic ballast circuit A is connected with LED drive circuit 3, LED drive circuit 3 still is connected with output LED+ and output LED respectively.
Further, the safety protection circuit 1 includes a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a varistor RV1, where the input end of the temperature fuse F1 is connected with the input end L, the input end of the temperature fuse F2 is connected with the input end N, the output end of the temperature fuse F1 is connected with the input end of the fuse resistor FR1, the output end of the fuse resistor FR1 is connected with the rectifying circuit 2 and the leakage current detection protection circuit B1, and the output end of the temperature fuse F2 is connected with the rectifying circuit 2 and the electronic ballast circuit a.
Through adopting above-mentioned technical scheme, through temperature fuse F1 and temperature fuse F2 that set up, when the arc phenomenon appears under electronic ballast uses, avoid the fluorescent tube that arouses because of the arc burns out even the risk of conflagration, through fuse resistance FR1 and piezo-resistor RV1 that sets up, can avoid the unusual risk that the product arouses under the overcurrent and overvoltage condition.
Further, the rectifying circuit 2 includes a diode DS1, a diode DS2, a diode DS3 and a diode DS4, where the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are sequentially connected end to form a first bridge rectifying module, an input end of the first bridge rectifying module is connected with the safety protection circuit 1, an output positive electrode of the first bridge rectifying module is connected with an input bus end of the field IC driving circuit B2, and an output negative electrode of the first bridge rectifying module is a loop ground line GND.
By adopting the technical scheme, the input power frequency alternating current or the high-frequency alternating current output by the electronic ballast is rectified through the arrangement of the rectifying circuit 2.
Further, the LED driving circuit 3 includes an electrolysis CE1 and a resistor RS1, where the electrolysis CE1 is connected in parallel with the resistor RS1, the anode of the electrolysis CE1 is connected with the output end led+ and the field IC driving circuit B2, and the cathode of the electrolysis CE1 is connected with the output end LED-, the field IC driving circuit B2 and the electronic ballast circuit a, respectively.
Through adopting above-mentioned technical scheme, through setting up electrolysis CE1, carry out the filtering with the electric current of preceding stage output, output for the LED fluorescent tube, carry out the LED drive and give out light, through the resistance RS1 that sets up, discharge the electric quantity on the electrolysis CE1 after the product outage, guarantee that the fluorescent tube extinguishes fast.
Further, the electronic ballast driving circuit a comprises a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage stabilizing tube Z1 and a MOS tube Q1, wherein the diode DS7 and the diode DS8 form a second bridge rectifier module, the detection capacitor CS4 is respectively connected with a temperature fuse F2 and the second bridge rectifier module, the second bridge rectifier module is respectively connected with the capacitor CS3, the resistor RS12 and the voltage stabilizing tube Z1 in parallel, the D electrode of the MOS tube Q1 is respectively connected with the cathode of the electrolysis CE1 and the field IC driving circuit B2, the S electrode of the MOS tube Q1 is connected with a loop ground wire GND, and the G electrode of the MOS tube Q1 is connected with one end of the voltage stabilizing tube Z1.
By adopting the technical scheme, the detection capacitor CS4 is arranged, and the characteristics of high frequency resistance and low frequency resistance of the capacitor are utilized to switch into matched loops under different use environments; rectifying the detected current by arranging a second bridge rectifier module; the capacitor CS3 is arranged to stabilize the detection voltage, so that the detection voltage is stable and is not disturbed; through setting a resistor RS12, discharging the electric quantity on a capacitor CS3, consuming leakage current during power frequency alternating current input, and ensuring that the MOS tube Q1 is protected from breakdown under the condition of poor contact of the power frequency alternating current input; the voltage stabilizing tube Z1 is used for limiting the detection voltage value, so that the detection signal is ensured to be normally input to the G pole of the MOS tube Q1; through setting up MOS pipe Q1 for electronic ballast return circuit constitutes the return circuit, and MOS pipe Q1 'S D utmost point connects LED drive circuit 3, MOS pipe Q1' S S utmost point ground wire GND, short circuit power frequency alternating current return circuit, guarantees electronic ballast return circuit normal operating.
Further, the leakage current detection protection circuit B1 includes a diode DS6, a resistor RS7, a resistor RS8, a resistor RS9, a resistor RS10, a resistor RS11, a capacitor CS1 and a chip U2, wherein the positive electrode of the diode DS6 is connected with a fuse resistor FR1, the positive electrode of the diode DS6 is further connected with a resistor RS8, a resistor RS9 and a resistor RS10 in series respectively, the negative electrode of the diode DS6 is connected with a resistor RS6 and a resistor RS7 in series, the other end of the resistor RS7 is connected with the 8 pin of the chip U2, the 6 pin of the chip U2 is connected with the resistor RS9, the resistor RS10 is connected with the capacitor CS1 on the 2 pin of the chip U2, the 1 pin of the chip U2 is connected with the resistor RS11, one end of the resistor RS11 and the 5 pin of the chip U2 are connected with a circuit ground GND, the other end of the resistor RS11 is connected with the resistor RS10, and the 4 pin of the chip U2 is connected with the field IC driving circuit B2.
By adopting the technical scheme, the leakage current detection protection circuit B1 is arranged, and the safety of the lamp tube in the disassembly and assembly process is ensured because the lamp tube is powered on from two ends.
Further, the field IC driving circuit B2 includes an inductor L1, a capacitor C2, a chip U1, a resistor RS2, a resistor RS3, a resistor RS4, a diode DS5, a capacitor CS2, a resistor RS5 and an inductor T1, where the inductor L1, the capacitor C1 and the capacitor C2 form pi-type filtering, one end of the diode DS5 is connected with the inductor L1, the 5 pin of the chip U1 is connected with the other end of the diode DS5, the capacitor CS2 is connected with the diode DS5 in parallel after being connected with the resistor RS5 in series, one end of the resistor RS5 is connected with the inductor T1, the 3 pin of the chip U1 is connected with the capacitor C2, the 1 pin of the chip U1 is connected with the resistor RS2, the other end of the resistor RS2 is connected with the capacitor C2, the 7 pin of the chip U1 is connected with the resistor RS3, the resistor RS4 is connected with the resistor RS3 in parallel, and one end is grounded.
By adopting the technical scheme, the field IC driving circuit B2 is arranged to filter out unnecessary harmonic components in the rectified current, and the field IC and the peripheral circuit thereof oscillate to output constant current.
Further, the implementation method of the lamp tube compatible with high frequency and power frequency comprises the following steps:
firstly, when an arc discharge phenomenon occurs under the application of an electronic ballast through the arranged temperature fuse F1 and temperature fuse F2, the risk of burning a lamp tube and even fire caused by arc discharge is avoided, and the abnormal risk of a product under the condition of overcurrent and overvoltage can be avoided through the arranged fuse resistor FR1 and the piezoresistor RV 1;
secondly, rectifying the input power frequency alternating current or the high-frequency alternating current output by the electronic ballast through the arrangement of the rectifying circuit 2;
thirdly, filtering the current output by the front stage through the electrolysis CE1, outputting the filtered current to the LED lamp tube, driving the LED to emit light, discharging the electric quantity on the electrolysis CE1 after the product is powered off through the resistor RS1, and ensuring that the lamp tube is extinguished quickly;
fourthly, by arranging the detection capacitor CS4, the characteristic of passing high frequency and low frequency through the capacitor is utilized to switch into a matched loop under different use environments; rectifying the detected current by arranging a second bridge rectifier module; the capacitor CS3 is arranged to stabilize the detection voltage, so that the detection voltage is stable and is not disturbed; through setting a resistor RS12, discharging the electric quantity on a capacitor CS3, consuming leakage current during power frequency alternating current input, and ensuring that the MOS tube Q1 is protected from breakdown under the condition of poor contact of the power frequency alternating current input; the voltage stabilizing tube Z1 is used for limiting the detection voltage value, so that the detection signal is ensured to be normally input to the G pole of the MOS tube Q1; by arranging the MOS tube Q1, the electronic ballast circuit forms a circuit, the D electrode of the MOS tube Q1 is connected with the LED driving circuit 3, the S electrode of the MOS tube Q1 is connected with the circuit ground GND, the power frequency alternating current circuit is short-circuited, and the electronic ballast circuit is ensured to work normally;
fifthly, by arranging the leakage current detection protection circuit B1, the safety of the lamp tube in the disassembly and assembly process is ensured because the lamp tube is powered on from two ends;
and sixthly, filtering out unnecessary harmonic components in the rectified current by arranging a field IC driving circuit B2, and oscillating and outputting constant current through the field IC and a peripheral circuit thereof.
The leakage current detection protection circuit B1 in this embodiment applies the patent leakage current protection IC of Shang Jiehua t and its peripheral circuits (the principle is shown in fig. 2, see patent CN201720143424.2 for details).
In summary, by setting the detection capacitor CS4, detecting different application environments by using the characteristics of high-frequency resistance and low-frequency resistance, and by skillfully setting connection points (respectively connecting the output load negative electrode and the loop GND) at two ends of the rear-stage switch MOS transistor Q1 and selecting the field IC as a constant current driver for power frequency alternating current application, the invention can accurately select a matched loop, ensure safe and efficient operation in different application environments, and realize perfect compatibility of application of electronic ballasts and power frequency alternating current application.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The implementation method of the lamp tube compatible with high frequency and power frequency is characterized by comprising the following steps of:
firstly, when an arc discharge phenomenon occurs under the application of an electronic ballast through the arranged temperature fuse F1 and temperature fuse F2, the risk of burning a lamp tube and even fire caused by arc discharge is avoided, and the abnormal risk of a product under the condition of overcurrent and overvoltage can be avoided through the arranged fuse resistor FR1 and the piezoresistor RV 1;
secondly, rectifying the input power frequency alternating current or the high-frequency alternating current output by the electronic ballast through the arrangement of the rectifying circuit (2);
thirdly, filtering the current output by the front stage through the electrolysis CE1, outputting the filtered current to the LED lamp tube, driving the LED to emit light, discharging the electric quantity on the electrolysis CE1 after the product is powered off through the resistor RS1, and ensuring that the lamp tube is extinguished quickly;
fourthly, by arranging the detection capacitor CS4, the characteristic of passing high frequency and low frequency through the capacitor is utilized to switch into a matched loop under different use environments; rectifying the detected current by arranging a second bridge rectifier module; the capacitor CS3 is arranged to stabilize the detection voltage, so that the detection voltage is stable and is not disturbed; through setting a resistor RS12, discharging the electric quantity on a capacitor CS3, consuming leakage current during power frequency alternating current input, and ensuring that the MOS tube Q1 is protected from breakdown under the condition of poor contact of the power frequency alternating current input; the voltage stabilizing tube Z1 is used for limiting the detection voltage value, so that the detection signal is ensured to be normally input to the G pole of the MOS tube Q1; by arranging the MOS tube Q1, the electronic ballast circuit forms a circuit, the D electrode of the MOS tube Q1 is connected with the LED driving circuit (3), the S electrode of the MOS tube Q1 is connected with the circuit ground GND, the power frequency alternating current circuit is short-circuited, and the electronic ballast circuit is ensured to work normally;
fifthly, by arranging the leakage current detection protection circuit (B1), the safety of the lamp tube in the disassembly and assembly process is ensured because the lamp tube is powered on from two ends;
and sixthly, filtering out unnecessary harmonic components in the rectified current by arranging a field IC driving circuit (B2), and oscillating and outputting constant current through the field IC and a peripheral circuit thereof.
2. The method for realizing the lamp tube compatible with high frequency and power frequency according to claim 1, wherein the method comprises the following steps: the safety protection circuit (1) comprises a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a piezoresistor RV1, wherein the input end of the temperature fuse F1 is connected with an input end L, the input end of the temperature fuse F2 is connected with an input end N, the output end of the temperature fuse F1 is connected with the input end of the fuse resistor FR1, the output end of the fuse resistor FR1 is respectively connected with a rectifying circuit (2) and a leakage current detection protection circuit (B1), the output end of the temperature fuse F2 is respectively connected with the rectifying circuit (2) and an electronic ballast driving circuit (A), the rectifying circuit (2) comprises a diode DS1, a diode DS2, a diode DS3 and a diode DS4, wherein the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are sequentially connected end to form a first bridge rectifying module, the input end of the first bridge rectifier module is connected with the safety protection circuit (1), the positive electrode of the output end of the first bridge rectifier module is connected with the input bus end of the solid IC driving circuit (B2), the negative electrode of the output end of the first bridge rectifier module is a loop ground wire GND, the LED driving circuit (3) comprises an electrolysis CE1 and a resistor RS1, wherein the electrolysis CE1 is connected with the resistor RS1 in parallel, the positive electrode of the electrolysis CE1 is respectively connected with an output end LED+ and the solid IC driving circuit (B2), the negative electrode of the electrolysis CE1 is respectively connected with the output end LED-, the solid IC driving circuit (B2) and the electronic ballast driving circuit (A), the electronic ballast driving circuit (A) comprises a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage stabilizing tube Z1 and a MOS tube Q1, wherein the diode DS7 and the diode DS8 form a second bridge rectifier module, the detection capacitor CS4 is respectively connected with the temperature fuse F2 and the second bridge rectifier module, the second bridge rectifier module is respectively connected with the capacitor CS3, the resistor RS12 and the voltage stabilizing tube Z1 in parallel, the D pole of the MOS tube Q1 is respectively connected with the cathode of the electrolysis CE1 and the solid IC driving circuit (B2), the S pole of the MOS tube Q1 is connected with the ground wire GND, the G pole of the MOS tube Q1 is connected with one end of the voltage stabilizing tube Z1, the leakage current detection protection circuit (B1) comprises the diode DS6, the resistor RS7, the resistor RS8, the resistor RS9, the resistor RS10, the resistor RS11, the capacitor CS1 and the chip U2, wherein the anode of the diode DS6 is respectively connected with the fuse resistor FR1, the resistor RS8, the resistor RS9 and the resistor RS10 are respectively connected in series with the anode of the diode DS6, the other end of the resistor RS7 is connected with the 8 pin of the chip U2, the 6 pin of the chip U2 is connected with the resistor RS9, the resistor RS10 is connected with the capacitor CS1 on the 2 pin of the chip U2, the 1 pin of the chip U2 is connected with the resistor RS11, one end of the resistor RS11 and the 5 pin of the chip U2 are both connected with the loop ground wire GND, the other end of the resistor RS11 is connected with the resistor RS10, the 4 pin of the chip U2 is connected with the solid IC driving circuit (B2), the solid IC driving circuit (B2) comprises an inductor L1, a capacitor C2, the chip U1, a resistor RS2, a resistor RS3, a resistor RS4, a diode DS5, a capacitor CS2, a resistor RS5 and an inductor T1, wherein the inductor L1, the capacitor C1 and the capacitor C2 form pi-shaped filter, one end of the chip U1 and one end of the diode DS5 are connected with the inductor L1, the 5 pin of the chip U1 is connected with the other end of the diode DS5, the capacitor CS2 is connected with the diode DS5 in parallel after being connected with the resistor RS5 in series, one end of a resistor RS5 is connected with an inductor T1, a 3 pin of a chip U1 is connected with a capacitor C2, a 1 pin of the chip U1 is connected with a resistor RS2, the other end of the resistor RS2 is connected with the capacitor C2, a 7 pin of the chip U1 is connected with a resistor RS3, a resistor RS4 is connected with the resistor RS3 in parallel, and one end of the resistor RS4 is grounded.
3. The lamp of claim 1, wherein the lamp is compatible with high frequency and power frequency, and the lamp is characterized by: the LED protection circuit comprises a safety protection circuit (1), a rectifying circuit (2), an LED driving circuit (3), an electronic ballast driving circuit (A), a leakage current detection protection circuit (B1) and a solid IC driving circuit (B2), wherein the safety protection circuit (1) is respectively connected with an input end L and an input end N, the safety protection circuit (1) is also respectively connected with the rectifying circuit (2), the leakage current detection protection circuit (B1) and the electronic ballast driving circuit (A), the rectifying circuit (2) is connected with the solid IC driving circuit (B2), the leakage current detection protection circuit (B1) is connected with the LED driving circuit (3), the electronic ballast driving circuit (A) is connected with the LED driving circuit (3), and the LED driving circuit (3) is also respectively connected with an LED+ at an output end and an LED-at an output end;
the safety protection circuit (1) comprises a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a piezoresistor RV1, wherein the input end of the temperature fuse F1 is connected with an input end L, the input end of the temperature fuse F2 is connected with an input end N, the output end of the temperature fuse F1 is connected with the input end of the fuse resistor FR1, the output end of the fuse resistor FR1 is respectively connected with a rectifying circuit (2) and a leakage current detection protection circuit (B1), and the output end of the temperature fuse F2 is respectively connected with the rectifying circuit (2) and an electronic ballast driving circuit (A);
the electronic ballast driving circuit (A) comprises a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage stabilizing tube Z1 and a MOS tube Q1, wherein the diode DS7 and the diode DS8 form a second bridge rectifier module, the detection capacitor CS4 is respectively connected with a temperature fuse F2 and the second bridge rectifier module, the second bridge rectifier module is respectively connected with the capacitor CS3, the resistor RS12 and the voltage stabilizing tube Z1 in parallel, the D electrode of the MOS tube Q1 is respectively connected with the cathode of the electrolysis CE1 and the field IC driving circuit (B2), the S electrode of the MOS tube Q1 is connected with a loop ground wire GND, and the G electrode of the MOS tube Q1 is connected with one end of the voltage stabilizing tube Z1.
4. A lamp as defined in claim 3, wherein the lamp is configured to: the rectification circuit (2) comprises a diode DS1, a diode DS2, a diode DS3 and a diode DS4, wherein the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are sequentially connected end to form a first bridge rectification module, the input end of the first bridge rectification module is connected with the safety protection circuit (1), the positive electrode of the output end of the first bridge rectification module is connected with the input bus end of the field IC driving circuit (B2), and the negative electrode of the output end of the first bridge rectification module is a loop ground wire GND.
5. The lamp of claim 4, wherein the lamp is compatible with high frequency and power frequency, and the lamp comprises: the LED driving circuit (3) comprises an electrolysis CE1 and a resistor RS1, wherein the electrolysis CE1 is connected with the resistor RS1 in parallel, the anode of the electrolysis CE1 is respectively connected with an output end LED+ and a field IC driving circuit (B2), and the cathode of the electrolysis CE1 is respectively connected with the output end LED-, the field IC driving circuit (B2) and an electronic ballast driving circuit (A).
6. The lamp of claim 5, wherein the lamp is compatible with high frequency and power frequency, and the lamp comprises: the leakage current detection protection circuit (B1) comprises a diode DS6, a resistor RS7, a resistor RS8, a resistor RS9, a resistor RS10, a resistor RS11, a capacitor CS1 and a chip U2, wherein the positive electrode of the diode DS6 is connected with a fuse resistor FR1, the positive electrode of the diode DS6 is also respectively connected with the resistor RS8, the resistor RS9 and the resistor RS10 in series, the negative electrode of the diode DS6 is connected with the resistor RS6 and the resistor RS7 in series, the other end of the resistor RS7 is connected with the 8 pin of the chip U2, the 6 pin of the chip U2 is connected with the resistor RS9, the resistor RS10 is connected with the capacitor CS1 on the 2 pin of the chip U2, the 1 pin of the chip U2 is connected with the resistor RS11, one end of the resistor RS11 and the 5 pin of the chip U2 are connected with a circuit ground GND, the other end of the resistor RS11 is connected with the resistor RS10, and the 4 pin of the chip U2 is connected with the solid IC driving circuit (B2).
7. The lamp of claim 6, wherein the lamp is compatible with high frequency and power frequency, and the lamp comprises: the field IC driving circuit (B2) comprises an inductor L1, a capacitor C2, a chip U1, a resistor RS2, a resistor RS3, a resistor RS4, a diode DS5, a capacitor CS2, a resistor RS5 and an inductor T1, wherein pi-shaped filtering is formed by the inductor L1, the capacitor C1 and the capacitor C2, one end of the diode DS5 is connected with the inductor L1, the 5 pin of the chip U1 is connected with the other end of the diode DS5, the capacitor CS2 is connected with the diode DS5 in parallel after being connected with the resistor RS5 in series, one end of the resistor RS5 is connected with the inductor T1, the 3 pin of the chip U1 is connected with the capacitor C2, the 1 pin of the chip U1 is connected with the resistor RS2, the other end of the resistor RS2 is connected with the capacitor C2, the 7 pin of the chip U1 is connected with the resistor RS3 in parallel, and one end of the resistor RS4 is grounded.
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| CN111343759B (en) * | 2020-03-30 | 2022-06-10 | 晨辉光宝科技股份有限公司 | LED drive circuit, lamp tube and lighting device |
| CN111542154B (en) * | 2020-04-23 | 2022-07-26 | 惠州市德萤科技有限公司 | LED drive circuit compatible with ballast |
| CN111542147A (en) * | 2020-06-01 | 2020-08-14 | 厦门普为光电科技有限公司 | Lamp tube with electric shock protection and compatible electronic ballast and power frequency AC power supply |
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