CN112399672A - Dimming lamp tube compatible with electronic ballast - Google Patents
Dimming lamp tube compatible with electronic ballast Download PDFInfo
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- H—ELECTRICITY
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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Abstract
The invention relates to a dimming lamp tube compatible with an electronic ballast, which comprises a full-wave rectification unit, a low-frequency filtering unit, a driving unit, a control unit, a constant-voltage output unit and an LED lamp group. The full-wave rectification unit comprises a capacitor C0, a first power interface end and a second power interface end, wherein a zero line interface N2 of the second power interface end and a live line interface L1 of the first power interface end are respectively connected with two ends of the capacitor C0. When the invention is installed on a lamp holder with an electronic ballast, the electronic ballast forms LC resonance with a capacitor C0, and the invention can work normally when a proper resonance point is reached. When the switch is pressed to switch on or off the power supply, the dimming is realized by memorizing the state before power failure through the control unit, the dimming range is large, and the operation is convenient and fast. The invention saves the cost of the original lamp holder for modification or replacement, greatly expands the application places of the lamp holder, and has more advantages particularly in the places where a large number of lamp tubes are used.
Description
Technical Field
The invention relates to the technical field of LED lamp tubes, in particular to a dimming lamp tube compatible with an electronic ballast.
Background
At present, the lamp tubes widely used in the market are mainly silicon controlled dimming, 2.4G remote control dimming and the like, and the dimming modes of the types cannot be directly used on a base with an electronic ballast, so that the existing old products cannot be directly replaced, and the compatibility is poor. In addition, for the occasions with large lamp tube usage, such as warehouses, large manufacturing workshops and the like, if the silicon controlled rectifier is used for dimming, only less than 10 lamps can be controlled by one dimmer, and a plurality of dimmers need to be additionally arranged; if remote control dimming is selected, the dimming is limited by the remote control distance of the remote controller, and the dimming is inconvenient.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a dimming lamp compatible with an electronic ballast, which can directly replace an old product and is convenient and fast for dimming.
In order to achieve the aim, the invention discloses a dimming lamp tube compatible with an electronic ballast, which comprises a full-wave rectification unit, a low-frequency filtering unit, a driving unit, a control unit, a constant-voltage output unit and an LED lamp group, wherein the full-wave rectification unit is connected with the low-frequency filtering unit; the full-wave rectification unit is connected with the low-frequency filtering unit and the control unit, the low-frequency filtering unit is connected with the constant-voltage output unit and the driving unit, the driving unit is connected with the LED lamp set, and the control unit is connected with the constant-voltage output unit and the driving unit;
the full-wave rectification unit comprises a capacitor C0, a first power interface end and a second power interface end, the first power interface end comprises a zero line interface N1 and a live line interface L1, and the second power interface end comprises a zero line interface N2; the zero line interface N2 and the live line interface L1 are respectively connected with two ends of the capacitor C0; the electronic ballast forms LC resonance with the capacitor C0 when being started, so that compatibility is realized;
when the full-wave rectification unit is connected with a power supply, the control unit is triggered to work, meanwhile, the constant voltage output unit provides constant voltage input for the control unit, and the control unit outputs a gradually changed analog control signal to the driving unit; when the power supply connected to the full-wave rectification unit is switched on-off-on, the control unit memorizes the state of the analog control signal when the power supply is switched off, and outputs the analog control signal with the constant memorized state to the driving unit when the power supply is switched on again, so that the dimming is realized.
Preferably, the full-wave rectification unit further comprises a diode D1, a diode D2 and a rectifier bridge stack BD, the neutral line interface N1 is connected with the cathode of the diode D1 and the anode of the diode D2, the cathode of the diode D2 is connected with the anode output end of the rectifier bridge stack BD and the low-frequency filtering unit, and the anode of the diode D1 and the cathode output end of the rectifier bridge stack BD are connected with an SGND; the live wire interface L1 and the zero wire interface N2 are respectively connected with the alternating current end of the rectifier bridge stack BD.
Preferably, in the low-frequency filter unit, the full-wave rectification unit is connected to an anode of a diode D6, a cathode of a diode D6 is connected to one end of an inductor L1, one end of a resistor RL1, and one end of a capacitor C1, the other end of a capacitor C1 is connected to GND, the other end of an inductor L1 is connected to the other end of a resistor RL1, one end of a capacitor C2, the driving unit, and the constant-voltage output unit, and the other end of a capacitor C2 is connected to GND.
Preferably, the driving unit comprises a constant current LED power switch chip IC2, which includes an HVDD pin, a GND pin, a DIM pin, an ROVP pin, a DRAIN pin, and a CS pin; in the driving unit, one end of a resistor R1 is connected with the low-frequency filtering unit, one end of a resistor R3B, the cathode of a diode D5, the anode of a capacitor EC1, one end of a resistor R3 and the anode input of the LED lamp group, the other end of a resistor R1 is connected with the HVDD pin, the other end of a resistor R3B is connected with one end of a capacitor C3, the other end of a capacitor C3 is connected with the anode of a diode D5, the DRAIN pin and one end of an inductor L3, and the other end of an inductor L3 is connected with the cathode of the capacitor EC1, the other end of a resistor R3 and the cathode input of the LED lamp group; the CS pin is connected with one end of a resistor RS, and the other end of the resistor RS is connected with GND; the ROVP pin is connected with one end of a resistor R4, and the other end of the resistor R4 and the GND pin are connected with GND; the DIM pin is connected with the control unit, one end of the resistor R5 and one end of the capacitor C4, and the other end of the resistor R5 and the other end of the capacitor C4 are connected with GND.
Preferably, the model of the constant current LED power switch chip IC2 is KP 142X.
Preferably, the constant voltage output unit includes a PWM control chip IC3 including a FB pin, a VDD pin, a GND pin, and a DRAIN pin; in the constant voltage output unit, the anode of a diode D4 is connected with the low frequency filter unit, the cathode of a diode D4 is connected with the DRAIN pin and the anode of a capacitor EC2, and the cathode of a capacitor EC2 is connected with GND; the FB pin is connected with one end of a resistor R6 and one end of a resistor R10, the VDD pin is connected with one end of a capacitor C5, the other end of the capacitor C5 is connected with the GND pin, the cathode of a diode D5A, the other end of a resistor R6 and one end of an inductor L2, the other end of the resistor R10 is connected with the other end of the inductor L2, the anode of a capacitor EC3, one end of the resistor R7 and the control unit, and the anode of a diode D5A is connected with the cathode of the capacitor EC3 and the other end of the resistor R7 is connected with GND.
Preferably, the PWM control chip IC3 is model KP 15012.
Preferably, the control unit comprises a single chip microcomputer MCU which comprises a trigger pin, a constant voltage input pin, an output pin and a grounding pin; in the control unit, one end of a resistor RX is connected to the full-wave rectification unit, the other end of the resistor RX is connected to a cathode of a diode D8, one end of a capacitor C6, one end of a resistor R8 and the trigger pin, an anode of a diode D8 is connected to the other end of a capacitor C6, the other end of a resistor R8 and a cathode of a capacitor EC4, an anode of a capacitor EC4 is connected to a cathode of a diode D7 and the constant voltage input pin, and an anode of a diode D7 is connected to the constant voltage output unit; the output pin is connected with one end of a resistor R9, and the other end of the resistor R9 is connected with the driving unit; the grounding pin is connected with GND.
Preferably, the leakage detection unit further comprises a detection chip IC1, which includes an RST pin, a CT pin, a VS pin, a CS pin, a VCC pin, a GND pin, and a DRN pin; in the leakage detection unit, the neutral line interface N2 is connected with a cathode of a diode D4A, an anode of the diode D4A is connected with one end of a resistor R7A, one end of a resistor R8A, one end of a resistor RX1A, one end of a capacitor C2A and an anode of a diode D2A, the other end of the resistor RX1A is connected with GND, a cathode of a diode D4A is connected with the RST pin, the other end of the resistor R8A is connected with the CT pin and one end of a capacitor C3A, and the other end of the resistor R7A is connected with the other end of the capacitor C2A and the other end of the capacitor C3A is connected with SGND; the live wire interface L1 is connected with the anode of a diode D1A after being connected with a resistor RX2A in series, the cathode of the diode D1A is connected with the VCC pin and one end of a capacitor C1A, and the other end of the capacitor C1A and the GND pin are connected with the SGND; the VS pin is connected with one end of a resistor R9A, the other end of the resistor R9A is connected with the anode of a diode D3A and one end of a resistor RX3A, and the cathode of the diode D3A and the other end of the resistor RX3A are connected with an SGND; and the DRN pin is connected with GND.
Preferably, the detection chip IC1 is model LT 2200.
The invention has the following beneficial effects:
when the invention is arranged on the lamp holder with the electronic ballast, the electronic ballast and the capacitor C0 form LC resonance, and when the proper resonance point is reached, the invention can normally work, and the effect of being compatible with the electronic ballast is achieved. Realize adjusting luminance through the on-off power of push switch, the range of adjusting luminance is big, convenient and fast. The invention saves the cost of the original lamp holder for modification or replacement, greatly expands the application places of the lamp holder, and has more advantages particularly in the places where a large number of lamp tubes are used.
Drawings
Fig. 1 is a schematic block diagram of a first embodiment.
Fig. 2 is a schematic diagram of a full-wave rectification unit according to an embodiment.
FIG. 3 is a diagram illustrating a low frequency filtering unit according to an embodiment.
FIG. 4 is a schematic diagram of a driving unit according to an embodiment.
FIG. 5 is a diagram of a constant voltage output unit according to an embodiment.
FIG. 6 is a diagram illustrating a control unit according to an embodiment.
Fig. 7 is a schematic circuit diagram of the first embodiment.
Fig. 8 is a schematic block diagram of the second embodiment.
Fig. 9 is a schematic diagram of a second leakage detecting unit according to an embodiment.
Fig. 10 is a schematic circuit diagram of the second embodiment.
Description of the main part symbols:
1: full-wave rectification unit, 2: low-frequency filtering unit, 3: drive unit, 4: constant voltage output unit, 5: control unit, 6: and a leakage detection unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
The first embodiment is as follows:
as shown in fig. 1 to 7, the invention discloses a dimming lamp tube compatible with an electronic ballast, which comprises a full-wave rectification unit 1, a low-frequency filtering unit 2, a driving unit 3, a control unit 5, a constant-voltage output unit 4 and an LED lamp set. The full-wave rectification unit 1 is connected with the low-frequency filtering unit 2 and the control unit 5, the low-frequency filtering unit 2 is connected with the constant-voltage output unit 4 and the driving unit 3, the driving unit 3 is connected with the LED lamp set, and the control unit 5 is connected with the constant-voltage output unit 4 and the driving unit 3.
Full wave rectification unit 1 includes film capacitor C0, first power interface end, second power interface end, diode D1, diode D2 and rectifier bridge pile BD, first power interface end includes zero line interface N1 and live wire interface L1, second power interface end all includes zero line interface N2 and live wire interface L2, live wire interface L2 is unsettled, this live wire interface L2 sets up the purpose and is the lamp stand for matching two electricity advances, avoid unused live wire joint interference installation on the lamp stand. The zero line interface N2 and the live line interface L1 are respectively connected with two ends of the film capacitor C0. The zero line interface N1 is connected with the cathode of the diode D1 and the anode of the diode D2, the cathode of the diode D2 is connected with the anode output end of the rectifier bridge stack BD and the low-frequency filtering unit 2, and the anode of the diode D1 and the cathode output end of the rectifier bridge stack BD are connected with the SGND; and the live wire interface L1 and the zero wire interface N2 are respectively connected with the alternating current end of the rectifier bridge stack BD. The full-wave rectification unit 1 converts alternating current into pulsating direct current through a bridge rectifier stack BD, a diode D1 and a diode D2.
In the low-frequency filter unit 2, the anode of the diode D6 is connected to the cathode of the diode D2 of the full-wave rectification unit 1, the cathode of the diode D6 is connected to one end of the inductor L1, one end of the resistor RL1 and one end of the capacitor C1, the other end of the capacitor C1 is connected to GND, the other end of the inductor L1 is connected to the other end of the resistor RL1, one end of the capacitor C2, the driving unit 3 and the constant-voltage output unit 4, and the other end of the capacitor C2 is connected to GND. The low-frequency filtering unit 2 allows a signal lower than the cutoff frequency to pass but does not allow a signal higher than the cutoff frequency to pass, and introduces a signal higher than the cutoff frequency to the ground.
The driving unit 3 comprises a constant current LED power switch chip IC2, and a KP142X chip which is necessary in technology is selected in the invention. The chip IC2 includes an HVDD pin (chip high voltage supply), a GND pin (chip ground reference), a DIM pin (output current regulation, which can accept pulse signal or analog dc signal input), an ROVP pin (output OVP regulation, which can continuously adjust OVP point by external resistance to GND), a DRAIN pin (internal power MOSFET DRAIN input), and a CS pin (current sampling input). In the driving unit 3, one end of a resistor R1 is connected with the low-frequency filter unit 2, one end of a resistor R3B, the cathode of a diode D5, the anode of a capacitor EC1, one end of a resistor R3 and the anode input of an LED lamp group, the other end of a resistor R1 is connected with an HVDD pin, the other end of a resistor R3B is connected with one end of a capacitor C3, the other end of a capacitor C3 is connected with the anode of a diode D5, a DRAIN pin and one end of an inductor L3, and the other end of an inductor L3 is connected with the cathode of the capacitor EC1, the other end of a resistor R3 and the cathode input of the LED lamp group. The CS pin is connected with one end of a resistor RS (in the case, the resistor RS1 and the resistor RS2 are connected in parallel), and the other end of the resistor RS is connected with GND. The ROVP pin is connected with one end of the resistor R4, and the other end of the resistor R4 and the GND pin are connected with GND. The DIM pin is connected with the control unit 5, one end of the resistor R5 and one end of the capacitor C4, and the other end of the resistor R5 and the other end of the capacitor C4 are connected with GND. The driving unit 3 is a BUCK circuit, and the driving unit steps down the input high voltage through the BUCK and outputs a load voltage for constant current control, thereby stably supplying power to the LED lamp set.
The constant voltage output unit 4 comprises a PWM control chip IC3, and a KP15012 chip which is necessary to be easy to be used in the invention. The chip IC3 includes an FB pin (feedback input), a VDD pin (supply), a GND pin (ground reference), and a DRAIN pin (internal high voltage power switch input). In the constant voltage output unit 4, the anode of the diode D4 is connected to the low frequency filter unit 2, the cathode of the diode D4 is connected to the DRAIN pin and the anode of the capacitor EC2, and the cathode of the capacitor EC2 is connected to GND. The FB pin is connected with one end of a resistor R6 and one end of a resistor R10, the VDD pin is connected with one end of a capacitor C5, the other end of the capacitor C5 is connected with the GND pin, the cathode of a diode D5A, the other end of a resistor R6 and one end of an inductor L2, the other end of the resistor R10 is connected with the other end of the inductor L2, the anode of a capacitor EC3, one end of the resistor R7 and the control unit 5, and the anode of a diode D5A is connected with the cathode of the capacitor EC3 and the other end of the resistor R7 is connected with GND. The constant voltage output unit 4 is a BUCK constant voltage circuit, supplies power to the chip IC3 with the input voltage behind the bridge, and the chip IC3 outputs a constant 5V voltage to supply power to the MCU of the control unit 5 through voltage reduction.
The control unit 5 includes a single chip microcomputer MCU of the type DP703, and the pins used include a trigger pin, a constant voltage input pin, an output pin, and a ground pin. In the control unit 5, one end of a resistor RX (in this case, the resistor RX3 and the resistor RX4 are connected in series) is connected to the full-wave rectification unit 1, the other end of the resistor RX is connected to a cathode of a diode D8, one end of a capacitor C6, one end of a resistor R8 and a trigger pin, an anode of a diode D8 is connected to the other end of a capacitor C6, the other end of a resistor R8 and a cathode of a capacitor EC4, an anode of a capacitor EC4 is connected to a cathode of a diode D7 and a constant voltage input pin, and an anode of a diode D7 is connected to the constant voltage output unit 4. The output pin is connected to one end of a resistor R9, and the other end of the resistor R9 is connected to the driving unit 3. The grounding pin is connected with GND. When the MCU has a 5V constant voltage circuit, a PWM signal is given to the chip IC2 to control dimming and memory.
In this embodiment, SGND and GND are the same ground points.
When the invention is arranged on a lamp holder provided with an electronic ballast and is electrified, the electronic ballast and the film capacitor C0 form LC resonance, and when a proper resonance point is reached, the invention can normally work, thereby realizing the compatible effect. When the full-wave rectification unit 1 is connected with a power supply, the control unit 5 is triggered to work, meanwhile, the constant voltage output unit 4 works to provide constant voltage input for the control unit 5, the control unit 5 outputs a gradually changed analog control signal to the driving unit 3, and the driving unit 3 adjusts the light of the LED lamp group according to the analog control signal.
The specific dimming process and principle are as follows:
1. when the switch is pressed for the first time to turn on the lamp, the MCU defaults to a command and gives a PWM signal from small to large, at this time, the brightness of the lamp tube gradually becomes bright from five percent to hundred percent and stops for about 6 seconds (the time can be adjusted by setting the MCU).
2. When the lamp tube needs to have the required brightness in the process of brightening, the power supply is quickly cut off and then the lamp tube is electrified, and the brightness at the time is the current brightness. For example, when the brightness reaches fifty percent during the light-on process, the lamp is quickly switched on and off, and the brightness of the lamp is fixed at fifty percent.
3. When the lamp is turned off for more than 6 seconds, the MCU is reset, and when the lamp is turned on again, the lamp tube is a gradual change process.
Example two:
as shown in fig. 8 to 10, the present embodiment is different from the first embodiment in that a leakage detecting unit 6 is additionally provided, the leakage detecting unit 6 includes a detecting chip IC1, and the present invention selects a tombstone LT2200 chip. The chip IC1 includes an RST pin (reset), a CT pin (CT capacitor), a VS pin (voltage sense), a CS pin (current sense), a VCC pin (power supply), a GND pin (ground reference), and a DRN pin (built-in MOSFET drain). In the leakage detection unit 6, the neutral line interface N2 is connected to the cathode of the diode D4A, the anode of the diode D4A is connected to one end of the resistor R7A, one end of the resistor R8A, one end of the resistor RX1A (in this case, the resistor R1A, the resistor R2A, and the resistor R3A are connected in series), one end of the capacitor C2A, and the anode of the diode D2A, the other end of the resistor RX1A is connected to GND, the cathode of the diode D4A is connected to the RST pin, the other end of the resistor R8A is connected to the CT pin and one end of the capacitor C3A, and the other end of the resistor R7A is connected to the other end of the capacitor C2A, and the other end of the capacitor C3A is. The live wire interface L1 is connected in series with a resistor RX2A (in the present case, the resistor RX2A is formed by connecting a resistor R4A, a resistor R5A and a resistor R6A in series) and then connected with the anode of a diode D1A, the cathode of the diode D1A is connected with the VCC pin and one end of a capacitor C1A, and the other end of the capacitor C1A and the GND pin are connected with SGND. The VS pin is connected to one end of a resistor R9A, the other end of the resistor R9A is connected to the anode of the diode D3A and one end of a resistor RX3A (in this case, the resistor R10A and the resistor R11A are connected in parallel), and the cathode of the diode D3A and the other end of the resistor RX3A are connected to the SGND. The DRN pin is connected with GND.
The detection chip IC1 is a chip capable of monitoring the impedance of the power grid, the SGND and the GND are connected through the detection chip IC1, and the detection chip IC1 connects the two ground through the MOS during normal operation. When the detection chip IC1 judges that the capacitive reactance of the circuit is abnormal, the grid of the MOS is cut off, so that the whole circuit is controlled to be on or off, the anti-electric-shock LED lamp has an anti-electric-shock function, and the safety of the LED lamp group and each chip is protected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A dimming lamp tube compatible with an electronic ballast is characterized in that: the LED constant-voltage LED lamp comprises a full-wave rectification unit, a low-frequency filtering unit, a driving unit, a control unit, a constant-voltage output unit and an LED lamp group; the full-wave rectification unit is connected with the low-frequency filtering unit and the control unit, the low-frequency filtering unit is connected with the constant-voltage output unit and the driving unit, the driving unit is connected with the LED lamp set, and the control unit is connected with the constant-voltage output unit and the driving unit;
the full-wave rectification unit comprises a capacitor C0, a first power interface end and a second power interface end, the first power interface end comprises a zero line interface N1 and a live line interface L1, and the second power interface end comprises a zero line interface N2; the zero line interface N2 and the live line interface L1 are respectively connected with two ends of the capacitor C0; the electronic ballast forms LC resonance with the capacitor C0 when being started, so that compatibility is realized;
when the full-wave rectification unit is connected with a power supply, the control unit is triggered to work, meanwhile, the constant voltage output unit provides constant voltage input for the control unit, and the control unit outputs a gradually changed analog control signal to the driving unit; when the power supply connected to the full-wave rectification unit is switched on-off-on, the control unit memorizes the state of the analog control signal when the power supply is switched off, and outputs the analog control signal with the constant memorized state to the driving unit when the power supply is switched on again, so that the dimming is realized.
2. The electronic ballast compatible dimming lamp of claim 1, wherein: the full-wave rectification unit further comprises a diode D1, a diode D2 and a rectifier bridge stack BD, the zero line interface N1 is connected with the cathode of the diode D1 and the anode of the diode D2, the cathode of the diode D2 is connected with the anode output end of the rectifier bridge stack BD and the low-frequency filtering unit, and the anode of the diode D1 and the cathode output end of the rectifier bridge stack BD are connected with an SGND; the live wire interface L1 and the zero wire interface N2 are respectively connected with the alternating current end of the rectifier bridge stack BD.
3. A dimming lamp compatible with an electronic ballast as claimed in claim 1 or 2, wherein: in the low-frequency filtering unit, the full-wave rectifying unit is connected with an anode of a diode D6, a cathode of a diode D6 is connected with one end of an inductor L1, one end of a resistor RL1 and one end of a capacitor C1, the other end of a capacitor C1 is connected with GND, the other end of an inductor L1 is connected with the other end of a resistor RL1, one end of a capacitor C2, the driving unit and the constant-voltage output unit, and the other end of a capacitor C2 is connected with GND.
4. A dimming lamp compatible with an electronic ballast as claimed in claim 1 or 2, wherein: the driving unit comprises a constant current LED power switch chip IC2 which comprises an HVDD pin, a GND pin, a DIM pin, an ROVP pin, a DRAIN pin and a CS pin; in the driving unit, one end of a resistor R1 is connected with the low-frequency filtering unit, one end of a resistor R3B, the cathode of a diode D5, the anode of a capacitor EC1, one end of a resistor R3 and the anode input of the LED lamp group, the other end of a resistor R1 is connected with the HVDD pin, the other end of a resistor R3B is connected with one end of a capacitor C3, the other end of a capacitor C3 is connected with the anode of a diode D5, the DRAIN pin and one end of an inductor L3, and the other end of an inductor L3 is connected with the cathode of the capacitor EC1, the other end of a resistor R3 and the cathode input of the LED lamp group; the CS pin is connected with one end of a resistor RS, and the other end of the resistor RS is connected with GND; the ROVP pin is connected with one end of a resistor R4, and the other end of the resistor R4 and the GND pin are connected with GND; the DIM pin is connected with the control unit, one end of the resistor R5 and one end of the capacitor C4, and the other end of the resistor R5 and the other end of the capacitor C4 are connected with GND.
5. The electronic ballast compatible dimming lamp of claim 4, wherein: the model of the constant current LED power switch chip IC2 is KP 142X.
6. A dimming lamp compatible with an electronic ballast as claimed in claim 1 or 2, wherein: the constant voltage output unit comprises a PWM control chip IC3 which comprises an FB pin, a VDD pin, a GND pin and a DRAIN pin; in the constant voltage output unit, the anode of a diode D4 is connected with the low frequency filter unit, the cathode of a diode D4 is connected with the DRAIN pin and the anode of a capacitor EC2, and the cathode of a capacitor EC2 is connected with GND; the FB pin is connected with one end of a resistor R6 and one end of a resistor R10, the VDD pin is connected with one end of a capacitor C5, the other end of the capacitor C5 is connected with the GND pin, the cathode of a diode D5A, the other end of a resistor R6 and one end of an inductor L2, the other end of the resistor R10 is connected with the other end of the inductor L2, the anode of a capacitor EC3, one end of the resistor R7 and the control unit, and the anode of a diode D5A is connected with the cathode of the capacitor EC3 and the other end of the resistor R7 is connected with GND.
7. The electronic ballast compatible dimming lamp of claim 6, wherein: the PWM control chip IC3 is of a model KP 15012.
8. A dimming lamp compatible with an electronic ballast as claimed in claim 1 or 2, wherein: the control unit comprises a single chip microcomputer MCU which comprises a trigger pin, a constant voltage input pin, an output pin and a grounding pin; in the control unit, one end of a resistor RX is connected to the full-wave rectification unit, the other end of the resistor RX is connected to a cathode of a diode D8, one end of a capacitor C6, one end of a resistor R8 and the trigger pin, an anode of a diode D8 is connected to the other end of a capacitor C6, the other end of a resistor R8 and a cathode of a capacitor EC4, an anode of a capacitor EC4 is connected to a cathode of a diode D7 and the constant voltage input pin, and an anode of a diode D7 is connected to the constant voltage output unit; the output pin is connected with one end of a resistor R9, and the other end of the resistor R9 is connected with the driving unit; the grounding pin is connected with GND.
9. A dimming lamp compatible with an electronic ballast as claimed in claim 1 or 2, wherein: the leakage detection device also comprises a leakage detection unit, wherein the leakage detection unit comprises a detection chip IC1, and the detection chip IC1 comprises an RST pin, a CT pin, a VS pin, a CS pin, a VCC pin, a GND pin and a DRN pin; in the leakage detection unit, the neutral line interface N2 is connected with a cathode of a diode D4A, an anode of the diode D4A is connected with one end of a resistor R7A, one end of a resistor R8A, one end of a resistor RX1A, one end of a capacitor C2A and an anode of a diode D2A, the other end of the resistor RX1A is connected with GND, a cathode of a diode D4A is connected with the RST pin, the other end of the resistor R8A is connected with the CT pin and one end of a capacitor C3A, and the other end of the resistor R7A is connected with the other end of the capacitor C2A and the other end of the capacitor C3A is connected with SGND; the live wire interface L1 is connected with the anode of a diode D1A after being connected with a resistor RX2A in series, the cathode of the diode D1A is connected with the VCC pin and one end of a capacitor C1A, and the other end of the capacitor C1A and the GND pin are connected with the SGND; the VS pin is connected with one end of a resistor R9A, the other end of the resistor R9A is connected with the anode of a diode D3A and one end of a resistor RX3A, and the cathode of the diode D3A and the other end of the resistor RX3A are connected with an SGND; and the DRN pin is connected with GND.
10. The electronic ballast compatible dimming lamp of claim 9, wherein: the detection chip IC1 is model LT 2200.
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| CN202011205276.5A CN112399672A (en) | 2020-11-02 | 2020-11-02 | Dimming lamp tube compatible with electronic ballast |
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| CN202011205276.5A CN112399672A (en) | 2020-11-02 | 2020-11-02 | Dimming lamp tube compatible with electronic ballast |
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