CN110557868A - 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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- 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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Abstract
the invention discloses a lamp tube compatible with high frequency and power frequency, which comprises a safety protection circuit, a rectification circuit, an LED drive circuit, an electronic ballast drive circuit A, a leakage current detection protection circuit B1 and a field IC drive circuit B2, wherein the safety protection circuit is respectively connected with an input end L and an input end N, the safety protection circuit is also respectively connected with the rectification circuit, the leakage current detection protection circuit B1 and the electronic ballast drive circuit A, and the rectification circuit is connected with the field IC drive circuit B2; the invention also discloses a realization method of the lamp tube compatible with high frequency and power frequency, and the safety of the lamp tube in the dismounting process is ensured by arranging the leakage current detection protection circuit B1 because the lamp tube is charged from two ends; the invention filters the unnecessary harmonic component in the current output after rectification by arranging the drive circuit B2 of the field IC, and outputs the constant current through the oscillation of the field IC and the 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 a high-frequency electronic ballast and power frequency alternating current application and an implementation method thereof.
Background
At present, LED lamp tubes on the market have many types, but when in use, the use method is different according to different principles: use with direct replacement compatible ballasts; the ballast is required to be modified and used after being removed from the trimming line; different lamp tubes need to be matched with different lamp holders of the lamp to be normally used, and a customer-end consumer without relevant professional knowledge is difficult to know which lamp holder in the lamp is reached, so that the user does not know how to purchase the lamp tubes to match the existing lamp, and the situation that the lamp is not lightened or damaged due to misuse easily occurs.
disclosure of Invention
The present invention is directed to a lamp tube compatible with high frequency and power frequency, so as to solve the problems mentioned in the background art. The lamp tube compatible with high frequency and power frequency provided by the invention has the characteristic of being compatible with high-frequency electronic ballast and double-end power frequency alternating current application at the same time.
The invention also aims to provide a method for realizing the lamp tube compatible with high frequency and power frequency.
in order to achieve the purpose, the invention provides the following technical scheme: a lamp tube compatible with high frequency and power frequency comprises a safety protection circuit, a rectification circuit, an LED drive circuit, an electronic ballast drive circuit A, a leakage current detection protection circuit B1 and a field IC drive circuit B2, wherein the safety protection circuit is respectively connected with an input end L and an input end N, the safety protection circuit is also respectively connected with the rectification circuit, a leakage current detection protection circuit B1 and the electronic ballast loop circuit A, the rectification circuit is connected with the field IC drive circuit B2, the leakage current detection protection circuit B1 is connected with the field IC drive circuit B2, the leakage current detection protection circuit B1 is connected with the LED drive circuit, the electronic ballast drive circuit A is connected with the LED drive circuit, and the LED drive circuit is also respectively connected with an output end LED + and an output end LED-.
further, the safety protection circuit comprises a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a voltage dependent resistor RV1, wherein 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 respectively connected with the rectifying circuit and the leakage current detection protection circuit B1, and the output end of the temperature fuse F2 is respectively connected with the rectifying circuit and the electronic ballast drive circuit A.
further, the rectifier 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 rectifier module, the input end of the first bridge rectifier 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 solid IC drive circuit B2, and the negative electrode of the output end of the first bridge rectifier module is a loop ground wire GND.
further, 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 ground IC driving circuit B2, and the cathode of the electrolysis CE1 is respectively connected with the output end LED-, the ground IC driving circuit B2 and the electronic ballast circuit A.
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 regulator 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 further respectively connected with the capacitor CS3, the resistor RS12 and the voltage regulator tube Z1 in parallel, a D pole of the MOS tube Q1 is respectively connected with a negative pole of the electrolytic CE1 and the field IC driving circuit B2, an S pole of the MOS tube Q1 is connected with a circuit ground GND, and a G pole of the MOS tube Q1 is connected with one end of the voltage regulator tube Z1.
In the invention, the leakage current detection protection circuit B further comprises a diode DS, a resistor RS, a capacitor CS and a chip U, wherein the anode of the diode DS is connected with the fuse resistor FR, the anode of the diode DS is further connected with the resistor RS, the resistor RS and the resistor RS in series, the cathode of the diode DS is connected with the resistor RS and the resistor RS in series, the other end of the resistor RS is connected with the pin 8 of the chip U, the pin 6 of the chip U is connected with the resistor RS, the resistor RS and the pin 2 of the chip U are connected with the capacitor CS, the pin 1 of the chip U is connected with the resistor RS, one end of the resistor RS and the pin 5 of the chip U are connected with a loop ground, the other end of the resistor RS is connected with the resistor RS, and the pin 4 of the chip U is connected with the field IC driving circuit B.
further, the solid IC driving circuit B includes an inductor L, a capacitor C, a chip U, a resistor RS, a diode DS, a capacitor CS, a resistor RS, and an inductor T, wherein the inductor L, the capacitor C, and the capacitor C form a pi filter, 4 pins of the chip U and one end of the diode DS are connected to the inductor L, 5 pins of the chip U are connected to the other end of the diode DS, the capacitor CS is connected in series with the resistor RS and then connected in parallel with the diode DS, one end of the resistor RS is connected to the inductor T, 3 pins of the chip U are connected to the capacitor C, 1 pin of the chip U is connected to the resistor RS, the other end of the resistor RS is connected to the capacitor C, 7 pins of the chip U are connected to the resistor RS, the resistor RS is connected in parallel with the resistor RS, and one end.
Further, the method for implementing the lamp tube compatible with high frequency and power frequency comprises the following steps:
Through the arrangement of the temperature fuse F1 and the temperature fuse F2, when an arc discharge phenomenon occurs under the application of an electronic ballast, the risk of burning a lamp tube or even fire caused by the arc discharge is avoided, and through the arrangement of the fuse resistor FR1 and the piezoresistor RV1, the abnormal risk caused by the over-current and over-voltage condition of a product can be avoided;
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 by arranging the electrolysis CE1, outputting the filtered current to the LED lamp tube, driving the LED to emit light, and discharging the electric quantity on the electrolysis CE1 after the power of the product is cut off by the arranged resistor RS1 to ensure that the lamp tube is quickly extinguished;
Fourthly, by arranging the detection capacitor CS4, the characteristic of high frequency and low frequency of the capacitor is utilized, and the circuit is switched into a matched loop under different use environments; rectifying the detection 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 not interfered; by arranging the resistor RS12, the electric quantity on the capacitor CS3 is discharged, leakage current in power frequency alternating current input is consumed, and the MOS transistor Q1 is protected from being broken down under the condition of poor contact of the power frequency alternating current input; a voltage regulator tube Z1 is arranged for limiting the detection voltage value and ensuring that the detection signal is normally input to the G pole of the MOS tube Q1; the electronic ballast loop forms a loop by arranging the MOS tube Q1, the D pole of the MOS tube Q1 is connected with the LED driving circuit 3, the S pole of the MOS tube Q1 is connected with the loop ground wire GND, the power frequency alternating current loop is short-circuited, and the electronic ballast loop is ensured to normally work;
by arranging the leakage current detection protection circuit B1, the safety of the lamp tube in the dismounting process is ensured because the lamp tube is charged at two ends;
And (VI) a solid IC drive circuit B2 is arranged to filter out unnecessary harmonic components in the rectified output current and oscillate and output a constant current through the solid IC and peripheral circuits thereof.
Further, in the present invention, the implementation method of the lamp tube compatible with high frequency and power frequency includes that the safety protection circuit includes a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a voltage dependent resistor RV1, wherein an input end of the temperature fuse F1 is connected to an input end L, an input end of the temperature fuse F2 is connected to an input end N, an output end of the temperature fuse F1 is connected to an input end of the fuse resistor FR1, an output end of the fuse resistor FR1 is respectively connected to the rectifier circuit and the leakage current detection protection circuit B1, an output end of the temperature fuse F2 is respectively connected to the rectifier circuit and the electronic ballast driving circuit a, the rectifier circuit includes 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 rectifier module, an input end of the first bridge rectifier module, the anode of the output end of the first bridge rectifier module is connected with the input bus end of a field IC drive circuit B2, the cathode of the output end of the first bridge rectifier module is a loop ground GND, the LED drive 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 an output end LED + and the field IC drive circuit B2, the cathode of the electrolysis CE1 is respectively connected with the output end LED-, the field IC drive circuit B2 and an electronic ballast loop A, the electronic ballast drive circuit A comprises a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage regulator 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 a second bridge rectifier module, and the second bridge rectifier module is also respectively connected with the capacitor CS3, a resistor RS12 and a voltage regulator Z1 in parallel, the D pole of a MOS tube Q1 is respectively connected with the negative pole of an electrolytic CE1 and a solid IC drive circuit B2, the S pole of a MOS tube Q1 is connected with a loop ground line GND, the G pole of a MOS tube Q1 is connected with one end of a voltage stabilizing tube Z1, a leakage current detection protection circuit B1 comprises a diode DS6, a resistor RS6, 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 pole of a diode DS6 is connected with a fuse resistor FR1, the positive pole of a diode DS6 is respectively connected with a resistor RS8, a resistor RS9 and a resistor RS10 in series, the negative pole of the diode DS6 is connected with a resistor RS6 and a resistor RS6 in series, the other end of the resistor RS6 is connected with an 8 pin of the chip U6, the pin 6 of the chip U6 is connected with a resistor RS6, the pin of the chip U6 is connected with a capacitor CS2 of the chip U6, and the other end of the resistor RS6 is connected with the loop ground line GND of the chip RS6, and the resistor RS6 of, the 4 feet of the chip U2 are connected with a solid IC drive circuit B2, the solid IC drive circuit B2 comprises an inductor L1, a capacitor C1, 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 the inductor L1, the capacitor C1 and the capacitor C2 form pi-type filtering, the 4 feet of the chip U1 and one end of the diode DS5 are connected with an inductor L1, the 5 feet of the chip U1 are connected with the other end of the diode DS5, the capacitor CS2 and the resistor RS5 are connected in series and then connected in parallel with the diode DS5, one end of the resistor RS5 is connected with the inductor T5, the 3 feet of the chip U5 are connected with the capacitor C5, the 1 foot of the chip U5 is connected with the resistor RS5, the other end of the resistor RS5 is connected with the capacitor C5, the pin of the resistor RS5 is connected with the resistor RS5, and one end of the resistor RS 36.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, through the arrangement of the temperature fuse F1 and the temperature fuse F2, when an arc discharge phenomenon occurs under the application of the electronic ballast, the risk of burning a lamp tube or even fire caused by the arc discharge is avoided, and through the arrangement of the fuse resistor FR1 and the piezoresistor RV1, the abnormal risk caused by the over-current and over-voltage condition of a product can be avoided;
2. the invention rectifies the input power frequency alternating current or the high-frequency alternating current output by the electronic ballast through the arrangement of the rectifying circuit;
3. according to the invention, the electrolysis CE1 is arranged, the current output by the preceding stage is filtered and output to the LED lamp tube to drive the LED to emit light, and the electric quantity on the electrolysis CE1 after the power of the product is cut off is discharged through the arranged resistor RS1, so that the lamp tube is ensured to be rapidly extinguished;
4. The detection capacitor CS4 is arranged, and the characteristic of high frequency and low frequency of the capacitor is utilized to switch into matched loops under different use environments; rectifying the detection 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 not interfered; by arranging the resistor RS12, the electric quantity on the capacitor CS3 is discharged, leakage current in power frequency alternating current input is consumed, and the MOS transistor Q1 is protected from being broken down under the condition of poor contact of the power frequency alternating current input; a voltage regulator tube Z1 is arranged for limiting the detection voltage value and ensuring that the detection signal is normally input to the G pole of the MOS tube Q1; the electronic ballast loop forms a loop by arranging the MOS tube Q1, the D pole of the MOS tube Q1 is connected with the LED driving circuit 3, the S pole of the MOS tube Q1 is connected with the loop ground wire GND, the power frequency alternating current loop is short-circuited, and the electronic ballast loop is ensured to normally work;
5. according to the invention, the leakage current detection protection circuit B1 is arranged, and the safety of the lamp tube in the dismounting process is ensured because the lamp tube is charged from two ends;
6. The invention filters the unnecessary harmonic component in the current output after rectification by arranging the drive circuit B2 of the field IC, and outputs the constant current through the oscillation of the field IC and the 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 rectifier circuit of 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 the electronic ballast loop circuit of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
referring to fig. 1-6, the present invention provides the following technical solutions: a lamp tube compatible with high frequency and power frequency comprises a safety protection circuit 1, a rectification circuit 2, an LED drive circuit 3, an electronic ballast drive circuit A, a leakage current detection protection circuit B1 and a field IC drive 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 rectification circuit 2, the leakage current detection protection circuit B1 and the electronic ballast loop circuit A, the rectification circuit 2 is connected with the field IC drive circuit B2, the leakage current detection protection circuit B1 is connected with the field IC drive circuit B2, the leakage current detection protection circuit B1 is connected with the LED drive circuit 3, the electronic ballast loop circuit A is connected with the LED drive circuit 3, and the LED drive circuit 3 is also respectively connected with an output end LED + and an output end LED-.
further, the safety protection circuit 1 includes a temperature fuse F1, a temperature fuse F2, a fuse resistor FR1 and a voltage dependent resistor RV1, wherein an input end of the temperature fuse F1 is connected to the input end L, an input end of the temperature fuse F2 is connected to the input end N, an output end of the temperature fuse F1 is connected to an input end of the fuse resistor FR1, an output end of the fuse resistor FR1 is connected to the rectifier circuit 2 and the leakage current detection protection circuit B1, and an output end of the temperature fuse F2 is connected to the rectifier circuit 2 and the electronic ballast circuit a.
By adopting the technical scheme, through the arranged temperature fuse F1 and the temperature fuse F2, when an arc discharge phenomenon occurs under the application of the electronic ballast, the risk of burning the lamp tube or even fire caused by the arc discharge is avoided, and the abnormal risk caused by the over-current and over-voltage condition of the product can be avoided through the arranged fuse resistor FR1 and the piezoresistor RV 1.
further, the rectifier 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 rectifier 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 field IC driving circuit B2, and the negative electrode of the output end of the first bridge rectifier module is a loop ground 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 by the arrangement of the rectifying circuit 2.
Further, the LED driving circuit 3 includes an electrolysis CE1 and a resistor RS1, wherein the electrolysis CE1 is connected in parallel with the resistor RS1, the anode of the electrolysis CE1 is connected to the output terminal LED + and the ground IC driving circuit B2, and the cathode of the electrolysis CE1 is connected to the output terminal LED-, the ground IC driving circuit B2 and the electronic ballast circuit a.
By adopting the technical scheme, the current output by the front stage is filtered by arranging the electrolysis CE1 and is output to the LED lamp tube to drive the LED to emit light, and the electric quantity on the electrolysis CE1 after the power of the product is cut off is discharged through the arranged resistor RS1, so that the lamp tube is ensured to be rapidly extinguished.
Further, the electronic ballast driving circuit a includes a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage regulator tube Z1, and a MOS tube Q1, where the diode DS7 and the diode DS8 constitute a second bridge rectifier module, the detection capacitor CS4 is connected to the temperature fuse F2 and the second bridge rectifier module, the second bridge rectifier module is further connected in parallel to the capacitor CS3, the resistor RS12, and the voltage regulator tube Z1, a D electrode of the MOS tube Q1 is connected to a negative electrode of the electrolytic CE1 and the field IC driving circuit B2, an S electrode of the MOS tube Q1 is connected to a ground GND, and a G electrode of the MOS tube Q1 is connected to one end of the voltage regulator tube Z1.
By adopting the technical scheme, the detection capacitor CS4 is arranged, and the characteristic of high frequency and low frequency of the capacitor is utilized to switch into matched loops under different use environments; rectifying the detection 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 not interfered; by arranging the resistor RS12, the electric quantity on the capacitor CS3 is discharged, leakage current in power frequency alternating current input is consumed, and the MOS transistor Q1 is protected from being broken down under the condition of poor contact of the power frequency alternating current input; a voltage regulator tube Z1 is arranged for limiting the detection voltage value and ensuring that the detection signal is normally input to the G pole of the MOS tube Q1; through setting up MOS pipe Q1 for the electronic ballast return circuit constitutes the return circuit, and MOS pipe Q1 'S D utmost point connects LED drive circuit 3, and MOS pipe Q1' S S utmost point connects return circuit ground wire GND, with the power frequency alternating current return circuit short circuit, guarantees that the electronic ballast return circuit normally works.
Further, the leakage current detection protection circuit B comprises a diode DS, a resistor RS, a capacitor CS and a chip U, wherein the anode of the diode DS is connected with a fuse resistor FR, the anode of the diode DS is further connected with the resistor RS, the resistor RS and the resistor RS in series, the cathode of the diode DS is connected with the resistor RS and the resistor RS in series, the other end of the resistor RS is connected with 8 pins of the chip U, 6 pins of the chip U are connected with the resistor RS, the resistor RS is connected with the capacitor CS on 2 pins of the chip U, 1 pin of the chip U is connected with the resistor RS, one end of the resistor RS and 5 pins of the chip U are connected with a loop ground GND, the other end of the resistor RS is connected with the resistor RS, and 4 pins of the chip U are connected with a field IC driving circuit B.
Through adopting above-mentioned technical scheme, through setting up leakage current detection protection circuit B1, because of the fluorescent tube is that the bi-polar advances the electricity, guaranteed the security of fluorescent tube in the dismouting in-process.
Further, the field IC driving circuit B includes an inductor L, a capacitor C, a chip U, a resistor RS, a diode DS, a capacitor CS, a resistor RS, and an inductor T, wherein the inductor L, the capacitor C, and the capacitor C form a pi filter, 4 pins of the chip U and one end of the diode DS are connected to the inductor L, 5 pins of the chip U are connected to the other end of the diode DS, the capacitor CS is connected in series with the resistor RS and then connected in parallel with the diode DS, one end of the resistor RS is connected to the inductor T, 3 pins of the chip U are connected to the capacitor C, 1 pin of the chip U is connected to the resistor RS, the other end of the resistor RS is connected to the capacitor C, 7 pins of the chip U are connected to the resistor RS, the resistor RS is connected in parallel with the resistor RS, and.
by adopting the technical scheme, the solid IC drive circuit B2 is arranged, unnecessary harmonic components in the rectified output current are filtered, and the constant current is oscillated and output by the solid IC and the peripheral circuit thereof.
Further, the method for implementing the lamp tube compatible with high frequency and power frequency comprises the following steps:
Through the arrangement of the temperature fuse F1 and the temperature fuse F2, when an arc discharge phenomenon occurs under the application of an electronic ballast, the risk of burning a lamp tube or even fire caused by the arc discharge is avoided, and through the arrangement of the fuse resistor FR1 and the piezoresistor RV1, the abnormal risk caused by the over-current and over-voltage condition of a product can be avoided;
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 by arranging the electrolysis CE1, outputting the filtered current to the LED lamp tube, driving the LED to emit light, and discharging the electric quantity on the electrolysis CE1 after the power of the product is cut off by the arranged resistor RS1 to ensure that the lamp tube is quickly extinguished;
Fourthly, by arranging the detection capacitor CS4, the characteristic of high frequency and low frequency of the capacitor is utilized, and the circuit is switched into a matched loop under different use environments; rectifying the detection 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 not interfered; by arranging the resistor RS12, the electric quantity on the capacitor CS3 is discharged, leakage current in power frequency alternating current input is consumed, and the MOS transistor Q1 is protected from being broken down under the condition of poor contact of the power frequency alternating current input; a voltage regulator tube Z1 is arranged for limiting the detection voltage value and ensuring that the detection signal is normally input to the G pole of the MOS tube Q1; the electronic ballast loop forms a loop by arranging the MOS tube Q1, the D pole of the MOS tube Q1 is connected with the LED driving circuit 3, the S pole of the MOS tube Q1 is connected with the loop ground wire GND, the power frequency alternating current loop is short-circuited, and the electronic ballast loop is ensured to normally work;
by arranging the leakage current detection protection circuit B1, the safety of the lamp tube in the dismounting process is ensured because the lamp tube is charged at two ends;
And (VI) a solid IC drive circuit B2 is arranged to filter out unnecessary harmonic components in the rectified output current and oscillate and output a constant current through the solid IC and peripheral circuits thereof.
The leakage current detection protection circuit B1 in this embodiment applies the leakage current protection IC and its peripheral circuits of the patent of cooperative supplier jie walt (the principle is shown in fig. 2, see patent CN201720143424.2 for details).
In summary, the detection capacitor CS4 is provided, the characteristics of high frequency and low frequency are utilized to detect different application environments, the connection points (respectively connected to the negative electrode of the output load and the circuit GND) at the two ends of the post-switch MOS transistor Q1 are skillfully provided, and the field IC is selected as the constant current driver for power frequency ac application, so that the circuit matched with the post-switch MOS transistor Q1 can be accurately selected, and the electronic ballast can be operated safely and efficiently in different application environments, thereby achieving perfect compatibility between the application of the electronic ballast and the power frequency ac application.
although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A lamp tube compatible with high frequency and power frequency is characterized in that: comprises a safety protection circuit (1), a rectification circuit (2), an LED drive circuit (3), an electronic ballast drive circuit (A), a leakage current detection protection circuit (B1) and a field IC drive circuit (B2), the safety protection circuit (1) is respectively connected with the input end L and the input end N, the safety protection circuit (1) is further respectively connected with the rectifying circuit (2), the leakage current detection protection circuit (B1) and the electronic ballast drive circuit (A), the rectifying circuit (2) is connected with the field IC drive circuit (B2), the leakage current detection protection circuit (B1) is connected with the field IC drive circuit (B2), the leakage current detection protection circuit (B1) is connected with the LED drive circuit (3), the electronic ballast drive circuit (A) is connected with the LED drive circuit (3), and the LED drive circuit (3) is further respectively connected with the output end LED + and the output end LED-.
2. A lamp tube compatible with high frequency and power frequency as claimed in claim 1, wherein: 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 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 respectively connected with the rectifying circuit (2) and the leakage current detection protection circuit (B1), and the output end of the temperature fuse F2 is respectively connected with the rectifying circuit (2) and the electronic ballast drive circuit (A).
3. a lamp tube compatible with high frequency and power frequency as claimed in claim 2, wherein: 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 rectifying module is connected with the safety protection circuit (1), the positive electrode of the output end of the first bridge rectifying module is connected with the input bus end of the field IC drive circuit (B2), and the negative electrode of the output end of the first bridge rectifying module is a loop ground wire GND.
4. A lamp tube compatible with high frequency and power frequency as claimed in claim 3, wherein: 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 solid IC driving circuit (B2), and the cathode of the electrolysis CE1 is respectively connected with the output end LED-, the solid IC driving circuit (B2) and an electronic ballast circuit (A).
5. a lamp tube compatible with high frequency and power frequency as claimed in claim 4, characterized in that: 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 regulator 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 also respectively connected with the capacitor CS3, the resistor RS12 and the voltage regulator tube Z1 in parallel, a D pole of the MOS tube Q1 is respectively connected with a negative pole of an electrolytic CE1 and a field IC driving circuit (B2), an S pole of the MOS tube Q1 is connected with a circuit GND, and a G pole of the MOS tube Q1 is connected with one end of a voltage regulator tube Z1.
6. A lamp tube compatible with high frequency and power frequency as claimed in claim 5, wherein: the leakage current detection protection circuit (B1) comprises a diode DS6, a resistor RS6, 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 a fuse resistor FR1, the anode of the diode DS6 is further respectively connected in series with a resistor RS8, a resistor RS9 and a resistor RS10, the cathode of the diode DS6 is connected in series with a resistor RS6 and a resistor RS7, the other end of the resistor RS7 is connected with an 8 pin of a chip U2, a 6 pin of the chip U2 is connected with a resistor RS9, a resistor RS10 is connected with a capacitor CS1 on a 2 pin of the chip U2, a 1 pin of the chip U2 is connected with a resistor RS11, one end of the resistor RS11 and a 5 pin of the chip U2 are both connected with a ground wire, the other end of the resistor RS11 is connected with a ground wire of the chip U10, and a ground of the chip U10 is connected with an.
7. A lamp tube compatible with high frequency and power frequency as claimed in claim 6, characterized in that: the solid IC drive circuit (B2) comprises an inductor L1, a capacitor C1, 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 the inductor L1, the capacitor C1 and the capacitor C2 form pi-type filtering, a pin 4 of the chip U1 and one end of the diode DS5 are connected with the inductor L1, a pin 5 of the chip U1 is connected with the other end of the diode DS5, the capacitor CS2 and the resistor RS5 are connected in series and then connected with the diode DS5 in parallel, one end of the resistor RS5 is connected with the inductor T1, a pin 3 of the chip U1 is connected with the capacitor C2, a pin 1 of the chip U1 is connected with the resistor RS2, the other end of the resistor RS2 is connected with the capacitor C2, a pin 7 of the chip U2 is connected with the resistor RS2 in parallel, and one end of the resistor RS 2.
8. the method for realizing a lamp tube compatible with high frequency and power frequency according to any one of claims 1 to 7, comprising the following steps:
Through the arrangement of the temperature fuse F1 and the temperature fuse F2, when an arc discharge phenomenon occurs under the application of an electronic ballast, the risk of burning a lamp tube or even fire caused by the arc discharge is avoided, and through the arrangement of the fuse resistor FR1 and the piezoresistor RV1, the abnormal risk caused by the over-current and over-voltage condition of a product can be avoided;
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 by arranging the electrolysis CE1, outputting the filtered current to the LED lamp tube, driving the LED to emit light, and discharging the electric quantity on the electrolysis CE1 after the power of the product is cut off by the arranged resistor RS1 to ensure that the lamp tube is quickly extinguished;
Fourthly, by arranging the detection capacitor CS4, the characteristic of high frequency and low frequency of the capacitor is utilized, and the circuit is switched into a matched loop under different use environments; rectifying the detection 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 not interfered; by arranging the resistor RS12, the electric quantity on the capacitor CS3 is discharged, leakage current in power frequency alternating current input is consumed, and the MOS transistor Q1 is protected from being broken down under the condition of poor contact of the power frequency alternating current input; a voltage regulator tube Z1 is arranged for limiting the detection voltage value and ensuring that the detection signal is normally input to the G pole of the MOS tube Q1; the electronic ballast loop forms a loop by arranging the MOS tube Q1, the D pole of the MOS tube Q1 is connected with the LED drive circuit (3), the S pole of the MOS tube Q1 is connected with the loop ground wire GND, the power frequency alternating current loop is short-circuited, and the electronic ballast loop is ensured to normally work;
By arranging the leakage current detection protection circuit (B1), the safety of the lamp tube in the dismounting process is ensured because the lamp tube is charged at two ends;
And (VI) a solid IC drive circuit (B2) is provided to filter out unnecessary harmonic components in the rectified output current and oscillate and output a constant current through the solid IC and its peripheral circuits.
9. the method as claimed in claim 8, wherein the lamp tube is compatible with high frequency and power frequency, and comprises: 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 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 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 drive 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 rectifier module, the input end of the first bridge rectifier module is connected with the safety protection circuit (1), the anode of the output end of the first bridge rectifier module is connected with an input bus end of a field IC drive circuit (B2), the cathode of the output end of the first bridge rectifier module is a loop ground GND, the LED drive 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 connected with an output end LED + and the field IC drive circuit (B2) respectively, the cathode of the electrolysis CE1 is connected with the output end LED-, the field IC drive circuit (B2) and an electronic ballast loop (A) respectively, the electronic ballast drive circuit (A) comprises a detection capacitor CS4, a diode DS7, a diode DS8, a capacitor CS3, a resistor RS12, a voltage regulator 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 connected with a temperature fuse F2 and the second bridge rectifier module respectively, and the second bridge rectifier module are also connected with the capacitor CS3 respectively, The resistor RS12 and the voltage stabilizing tube Z1 are connected in parallel, the D pole of the MOS tube Q1 is respectively connected with the cathode of the electrolytic CE1 and a ground IC drive circuit (B2), the S pole of the MOS tube Q1 is connected with a 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 RS6, 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 a fuse resistor FR1, the anode of the diode DS6 is respectively connected with a resistor RS8, a resistor RS9 and a resistor RS10 in series, the cathode of the diode DS 10 is connected with a resistor RS10, the other end of the resistor RS10 is connected with a pin of the chip U368, the pin of the chip U10 is connected with a resistor RS10, the pin of the chip RS10 is connected with the loop ground wire RS10, the resistor RS10 is connected with the chip RS10, the pin of the chip RS10, the chip RS10, the other end of the resistor RS11 is connected with a resistor RS10, the 4-pin of the chip U2 is connected with a solid IC drive circuit (B2), the solid IC drive circuit (B2) comprises an inductor L1, a capacitor C1, 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 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 DS1, the capacitor CS1 is connected with the resistor RS1 in series and then connected with the diode DS1 in parallel, one end of the resistor RS1 is connected with the inductor T1, the 3-pin of the chip U1 is connected with the capacitor C1, the 1-pin of the chip U1 is connected with the resistor RS1, the other end of the resistor RS1 is connected with the resistor RS1 in parallel, and one end of the resistor RS1 and the resistor RS 36.
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| 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 |
| CN112135379A (en) * | 2020-10-27 | 2020-12-25 | 横店集团得邦照明股份有限公司 | T-shaped LED lamp tube and implementation method thereof |
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