CN109219187B - LED fluorescent lamp driving circuit compatible with electronic, inductive and commercial power - Google Patents
LED fluorescent lamp driving circuit compatible with electronic, inductive and commercial power Download PDFInfo
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- CN109219187B CN109219187B CN201810954354.8A CN201810954354A CN109219187B CN 109219187 B CN109219187 B CN 109219187B CN 201810954354 A CN201810954354 A CN 201810954354A CN 109219187 B CN109219187 B CN 109219187B
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- 230000001939 inductive effect Effects 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 35
- 238000004088 simulation Methods 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000008094 contradictory effect Effects 0.000 description 3
- 101100496158 Arabidopsis thaliana CLF gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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]
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides an LED fluorescent lamp driving circuit compatible with electronics, inductance and commercial power, wherein a rectified alternating current input end is connected with an alternating current power supply, and the positive electrode of a direct current output end is respectively connected with a filament analog circuit and the positive electrode of an LED light source; the input end of the circuit working mode selection circuit is connected to the live wire end of the alternating current power supply, and the output end of the circuit working mode selection circuit is connected to a chip U1 of the BUCK drive circuit; when the LED fluorescent lamp driving circuit works in an electronic ballast mode, the circuit working mode selecting circuit controls the chip U1 to stop working; when the LED fluorescent lamp driving circuit works in an inductive ballast or a mains supply mode, the circuit working mode selection circuit controls the chip U1 to work normally; the filament resistance analog circuit appears as a filament analog resistance in electronic ballast mode and as a high impedance in inductive ballast or mains mode. The LED fluorescent lamp driving circuit can automatically identify whether the original circuit is an inductive ballast or an electronic ballast and adopts a corresponding working mode.
Description
Technical Field
The invention relates to a driving circuit, in particular to an LED fluorescent lamp driving circuit.
Background
The traditional fluorescent lamps on the market are currently used in the conditions of inductive ballasts and electronic ballasts, the working principles of the two ballasts are quite different, and common consumers can hardly distinguish which type is specific.
Therefore, in order to increase compatibility and reduce selection difficulty of consumers, the driving circuit of the current LED fluorescent lamp needs to be compatible with an inductive ballast and an electronic ballast, so that the LED fluorescent lamp is directly installed under the condition that the original circuit is not replaced. In the prior art, a thermistor is adopted as a filament analog resistor at the mains supply input end, the resistance of the thermistor is selected in a very contradictory way, the compatibility of the electronic ballast is poor due to the fact that the resistance is selected to be large, and the heat productivity of the thermistor is large when the electronic ballast works in an inductive ballast and a mains supply mode.
Disclosure of Invention
The invention aims to solve the main technical problem of providing an LED fluorescent lamp driving circuit which can automatically identify whether an original circuit is an inductive ballast or an electronic ballast and adopts a corresponding working mode.
An LED fluorescent lamp driving circuit compatible with electronics, inductance and mains supply, comprising: the device comprises a rectifying circuit, a filament resistance analog circuit, a circuit working mode selection circuit and a BUCK driving circuit;
The rectified alternating current input end is connected with an alternating current power supply, and the positive electrode of the direct current output end is respectively connected with the filament analog circuit and the positive electrode of the LED light source;
The input end of the circuit working mode selection circuit is connected to the live wire end of the alternating current power supply, and the output end of the circuit working mode selection circuit is connected to a chip U1 of the BUCK drive circuit;
When the LED fluorescent lamp driving circuit works in an electronic ballast mode, the circuit working mode selection circuit controls the chip U1 to stop working; when the LED fluorescent lamp driving circuit works in an inductive ballast or a mains supply mode, the circuit working mode selection circuit controls the chip U1 to work normally;
The filament resistance analog circuit presents a filament analog resistance in the electronic ballast mode and presents a high impedance in the inductive ballast or mains mode.
In a preferred embodiment: the filament resistance simulation circuit comprises a triode Q6, an nMOS tube Q5 and a capacitor C8;
The drain electrode of the nMOS transistor Q5 is connected to the positive electrode of the direct current output end through a resistor R30, the grid electrode and the drain electrode of the nMOS transistor Q5 are connected through a resistor R29, the grid electrode and the source electrode of the nMOS transistor Q5 are connected through a voltage stabilizing tube DZ2, and the source electrode of the nMOS transistor Q5 is connected to the emitter electrode of the triode Q6; the base of the triode Q6 is connected to the positive electrode of the direct current output end through a voltage dropping resistor, the capacitor C8 is connected between the base and the collector of the triode Q6, and the capacitor C8 is connected with the resistor R31 in parallel.
In a preferred embodiment: the circuit working mode selection circuit comprises a capacitor YC2 and a capacitor C6; one end of the capacitor YC2 is connected to the fire wire end of the alternating current power supply, and the other end is connected to the grid electrode of the nMOS tube Q4 through a resistor R16, a diode D12 and a resistor R18; one end of the diode D12 connected with the resistor R18 is connected with GND through the capacitor C6; the source of the nMOS transistor is connected to GND and the GND terminal of the chip U1.
In a preferred embodiment: the COMP end of the chip U1 is connected to GND through a capacitor C5 and a resistor R12; one end of the capacitor C5 connected with the resistor R12 is connected to the positive electrode of the direct current output end through resistors R21 and R20.
In a preferred embodiment: the VIN end of the chip U1 is connected to the positive electrode of the direct current output end through resistors R6, R4 and R2.
In a preferred embodiment: the relay circuit is also included; the relay circuit is connected between the alternating current input end of the fluorescent lamp driving circuit and the other two input pin needles, and when the other two input pin needles are not installed in the lamp holder, the relay circuit is in a normally open state, and the other two input pin needles are disconnected from the alternating current input end.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. According to the LED fluorescent lamp driving circuit compatible with electronic, inductive and commercial power, when the circuit works in an electronic ballast mode, the voltage at two ends of a lamp filament is low, the charging time of a capacitor C8 is long, Q6 is conducted firstly, Q5 is conducted after Q6 is conducted, and a resistor R30 is used as a filament analog resistor. When the circuit works in a mains supply and inductance ballast mode, the capacitor C8 charges quickly to enable the base potential of the Q6 to be higher than the collector potential, the Q6 is cut off, and therefore the Q5 is also cut off. Therefore, the technical scheme that the thermistor is adopted as the filament analog resistor at the mains supply input end in the prior art is overcome, and the problem that the resistance value of the thermistor is very contradictory in selection is solved.
2. When the LED fluorescent lamp driving circuit compatible with electronics, inductance and mains supply works in an electronic ballast mode, the capacitor C6 is charged by YC2 to enable Q4 to be conducted so as to enable ICU1 to stop working; when the circuit works in an inductive ballast and a mains supply, YC2 presents high impedance, Q4 works in a cut-off state, and a BUCK main loop works normally. The corresponding operation mode can be automatically selected according to the different operation modes.
Drawings
Fig. 1 is a circuit diagram of a preferred embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples;
Referring to fig. 1, an electronic, inductive, and mains compatible LED fluorescent lamp driving circuit includes: the device comprises a rectifying circuit, a filament resistance analog circuit, a circuit working mode selection circuit and a BUCK driving circuit;
the rectified alternating current input end is connected with an alternating current power supply, and the positive electrode of the direct current output end is respectively connected with the filament analog circuit and the positive electrode of the LED light source;
The input end of the circuit working mode selection circuit is connected to the live wire end of the alternating current power supply, and the output end of the circuit working mode selection circuit is connected to a chip U1 of the BUCK drive circuit;
the filament resistance simulation circuit comprises a triode Q6, an nMOS tube Q5 and a capacitor C8;
The drain electrode of the nMOS transistor Q5 is connected to the positive electrode of the direct current output end through a resistor R30, the base electrode and the drain electrode of the nMOS transistor Q5 are connected through a resistor R29, the gate electrode and the source electrode of the nMOS transistor Q5 are connected through a voltage stabilizing tube DZ2, and the source electrode of the nMOS transistor Q5 is connected to the emitter electrode of the triode Q6; the base of the triode Q6 is connected to the positive electrode of the direct current output end through a voltage dropping resistor, the capacitor C8 is connected between the base and the collector of the triode Q6, and the capacitor C8 is connected with the resistor R31 in parallel.
The circuit working mode selection circuit comprises a capacitor YC2 and a capacitor C6; one end of the capacitor YC2 is connected to the fire wire end of the alternating current power supply, and the other end is connected to the grid electrode of the nMOS tube Q4 through a resistor R16, a diode D12 and a resistor R18; one end of the diode D12 connecting resistor R18 is connected with GND through the capacitor C6; the source of the nMOS transistor is connected to GND and the GND terminal of the chip U1.
The COMP end of the chip U1 is connected to GND through a capacitor C5 and a resistor R12; one end of the capacitor C5 connecting resistor R12 is connected to the positive electrode of the direct current output end through resistors R21 and R20.
The VIN end of the chip U1 is connected to the positive electrode of the direct current output end through resistors R6, R4 and R2.
When the circuit works in an electronic ballast mode, the voltage at two ends of a filament is lower, the charging time of a capacitor C8 is longer, a triode Q6 is conducted firstly, an nMOS tube Q5 is conducted after the triode Q6 is conducted, and a resistor R30 is used as a filament analog resistor. When the circuit works in a mains supply and inductance ballast mode, the capacitor C8 is charged to enable the base potential of the triode Q6 to be higher than the collector potential quickly, the triode Q6 is cut off, and therefore the nMOS tube Q5 is also cut off. Therefore, the technical scheme that the thermistor is adopted as the filament analog resistor at the mains supply input end in the prior art is overcome, and the problem that the resistance value of the thermistor is very contradictory in selection is solved.
In addition, when the circuit works in the electronic ballast mode, the capacitor YC2 charges the capacitor C6 to enable the nMOS tube Q4 to be conducted so that the chip U1 stops working; when the circuit works in an inductive ballast and a mains supply, the capacitor YC2 presents high impedance, the nMOS tube Q4 works in a cut-off state, and the BUCK main loop works normally. The corresponding operation mode can be automatically selected according to the different operation modes.
Finally, in order to ensure the installation safety, the embodiment also comprises a relay circuit; the relay circuit is connected between the alternating current input end of the fluorescent lamp driving circuit and the other two input pin needles, and when the other two input pin needles are not installed in the lamp holder, the relay circuit is in a normally open state, and the other two input pin needles are disconnected from the alternating current input end.
The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present invention within the scope of the present invention disclosed herein by this concept, which falls within the actions of invading the protection scope of the present invention.
Claims (4)
1. An LED fluorescent lamp driving circuit compatible with electronics, inductance and mains supply, characterized by comprising: the device comprises a rectifying circuit, a filament resistance analog circuit, a circuit working mode selection circuit and a BUCK driving circuit;
The rectified alternating current input end is connected with an alternating current power supply, and the positive electrode of the direct current output end is respectively connected with the filament resistance analog circuit and the positive electrode of the LED light source;
The input end of the circuit working mode selection circuit is connected to the live wire end of the alternating current power supply, and the output end of the circuit working mode selection circuit is connected to a chip U1 of the BUCK drive circuit;
When the LED fluorescent lamp driving circuit works in an electronic ballast mode, the circuit working mode selection circuit controls the chip U1 to stop working; when the LED fluorescent lamp driving circuit works in an inductive ballast or a mains supply mode, the circuit working mode selection circuit controls the chip U1 to work normally;
the filament resistance simulation circuit presents a filament simulation resistance in the electronic ballast mode and presents high impedance in the inductive ballast or the mains supply mode;
the filament resistance simulation circuit comprises a triode Q6, an nMOS tube Q5 and a capacitor C8;
the drain electrode of the nMOS tube Q5 is connected to the positive electrode of the direct current output end through a resistor R30, the grid electrode and the drain electrode of the nMOS tube Q5 are connected through a resistor R29, the grid electrode and the source electrode of the nMOS tube Q5 are connected through a voltage stabilizing tube DZ2, and the source electrode of the nMOS tube Q5 is connected to the emitter electrode of the triode Q6, the base electrode of the triode Q6 is connected to the positive electrode of the direct current output end through a voltage reducing resistor, the capacitor C8 is connected between the base electrode and the collector electrode of the triode Q6, and the capacitor C8 is connected in parallel with the resistor R31;
The circuit working mode selection circuit comprises a capacitor YC2 and a capacitor C6; one end of the capacitor YC2 is connected to the fire wire end of the alternating current power supply, and the other end is connected to the grid electrode of the nMOS tube Q4 through a resistor R16, a diode D12 and a resistor R18; one end of the diode D12 connected with the resistor R18 is connected with GND through the capacitor C6; the source of the nMOS transistor is connected to GND and the GND terminal of the chip U1.
2. The electronic, inductive, and mains compatible LED fluorescent lamp driving circuit of claim 1, wherein: the COMP end of the chip U1 is connected to GND through a capacitor C5 and a resistor R12; one end of the capacitor C5 connected with the resistor R12 is connected to the positive electrode of the direct current output end through resistors R21 and R20.
3. The electronic, inductive, and mains compatible LED fluorescent lamp driving circuit of claim 2, wherein: the VIN end of the chip U1 is connected to the positive electrode of the direct current output end through resistors R6, R4 and R2.
4. A LED fluorescent lamp driving circuit compatible with electronics, inductance and mains according to any one of claims 1-3, characterized in that: the relay circuit is also included; the relay circuit is connected between the alternating current input end of the fluorescent lamp driving circuit and the other two input pin needles, and when the other two input pin needles are not installed in the lamp holder, the relay circuit is in a normally open state, and the other two input pin needles are disconnected from the alternating current input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810954354.8A CN109219187B (en) | 2018-08-21 | 2018-08-21 | LED fluorescent lamp driving circuit compatible with electronic, inductive and commercial power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810954354.8A CN109219187B (en) | 2018-08-21 | 2018-08-21 | LED fluorescent lamp driving circuit compatible with electronic, inductive and commercial power |
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| Publication Number | Publication Date |
|---|---|
| CN109219187A CN109219187A (en) | 2019-01-15 |
| CN109219187B true CN109219187B (en) | 2024-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810954354.8A Active CN109219187B (en) | 2018-08-21 | 2018-08-21 | LED fluorescent lamp driving circuit compatible with electronic, inductive and commercial power |
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| CN (1) | CN109219187B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111278192B (en) * | 2020-03-27 | 2024-08-02 | 浙江阳光美加照明有限公司 | LED drive control circuit compatible with various ballasts of different types |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540265A (en) * | 2014-11-21 | 2015-04-22 | 南京大学 | Low-cost omnidirectional fully-compatible driving device |
| CN105805582A (en) * | 2016-05-28 | 2016-07-27 | 海宁市新光源照明科技股份有限公司 | Straight pipe type double-compatible LED lamp |
| CN105828470A (en) * | 2016-01-15 | 2016-08-03 | 厦门佰明光电股份有限公司 | Wide-voltage, fully-compatible, self-adaptive and single/double-end LED tube |
| CN206136388U (en) * | 2016-10-13 | 2017-04-26 | 厦门阳光恩耐照明有限公司 | LED sunlight lamp driving circuit of compatible electronic type, inductance type and alternating current |
| CN209358807U (en) * | 2018-08-21 | 2019-09-06 | 厦门阳光恩耐照明有限公司 | The LED daylight lamp driving circuit of compatible electronic formula, inductance type and alternating current |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8729811B2 (en) * | 2010-07-30 | 2014-05-20 | Cirrus Logic, Inc. | Dimming multiple lighting devices by alternating energy transfer from a magnetic storage element |
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- 2018-08-21 CN CN201810954354.8A patent/CN109219187B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540265A (en) * | 2014-11-21 | 2015-04-22 | 南京大学 | Low-cost omnidirectional fully-compatible driving device |
| CN105828470A (en) * | 2016-01-15 | 2016-08-03 | 厦门佰明光电股份有限公司 | Wide-voltage, fully-compatible, self-adaptive and single/double-end LED tube |
| CN105805582A (en) * | 2016-05-28 | 2016-07-27 | 海宁市新光源照明科技股份有限公司 | Straight pipe type double-compatible LED lamp |
| CN206136388U (en) * | 2016-10-13 | 2017-04-26 | 厦门阳光恩耐照明有限公司 | LED sunlight lamp driving circuit of compatible electronic type, inductance type and alternating current |
| CN209358807U (en) * | 2018-08-21 | 2019-09-06 | 厦门阳光恩耐照明有限公司 | The LED daylight lamp driving circuit of compatible electronic formula, inductance type and alternating current |
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| CN109219187A (en) | 2019-01-15 |
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