CN219124395U - Anti-surge and non-afterglow LED driving circuit, luminous component and LED lamp - Google Patents
Anti-surge and non-afterglow LED driving circuit, luminous component and LED lamp Download PDFInfo
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- CN219124395U CN219124395U CN202222984566.5U CN202222984566U CN219124395U CN 219124395 U CN219124395 U CN 219124395U CN 202222984566 U CN202222984566 U CN 202222984566U CN 219124395 U CN219124395 U CN 219124395U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model provides an anti-surge and non-afterglow LED driving circuit, a light emitting component and an LED lamp, comprising: the device comprises a surge absorption circuit, an EMI filter circuit, a rectifying circuit, an anti-surge integrated circuit U1, an output filter circuit and an output ripple removing circuit; the surge absorption circuit and the EMI filter circuit are sequentially connected between the commercial power and the alternating current input end of the rectifying circuit; the direct current output end of the rectifying circuit is connected with the switching power supply and controls the switching-off and switching-on of a switching device in the switching power supply so as to connect or disconnect the LED load with the direct current output end of the rectifying circuit; the high-voltage starting pin of the anti-surge integrated circuit U1 is connected to the direct-current output positive electrode of the rectifying circuit, the two DRAIN pins are connected with the negative electrode of the LED load through the power inductor L3, the Drain pins are internally provided with 600V MOS tubes, and the peak voltage at the two ends of the MOS tubes is controlled below 600V by adjusting the voltage of the output LED load.
Description
Technical Field
The utility model relates to LED illumination, in particular to an LED driving circuit.
Background
The LED lighting products are common lighting equipment in life, various LED lamp models are endless, but the non-isolated LED driving power supply in the market at present has weak luminescence (namely afterglow) phenomenon after the lamp is turned off, still consumes electricity and has lamp bead electricity leakage, thereby influencing energy efficiency, the service life of the LED and product safety.
In addition, the straight tube type LED lamps on the market are classified into two types of over-authentication and no-authentication: the over-authenticated lamp tube has the advantages that more EMI and anti-surge devices are added in the driving power supply, the peripheral circuit is complex, the driving power supply is large in volume, so that a longer space is needed for placing the power supply by the PC end cover, the dark area of the lamp tube is longer, the light emitting effect is poor, and the requirements of optics and appearance design cannot be met; the lamp tube without authentication has the advantages that the driving power supply is small in size and can be placed in a small space, the end cover is small, the light emitting effect is good, but the power supply does not have an anti-surge device, a circuit is not protected in a related manner, and once lightning stroke occurs, the integrated circuit is easily damaged in an unrecoverable manner, so that the lamp product is invalid.
Disclosure of Invention
The utility model aims to solve the main technical problems of providing an anti-surge and non-afterglow LED driving circuit, wherein the LED does not have weak luminescence after being turned off, the miniaturization of the driving circuit can be realized, the peripheral circuit is simple, and the light emitting effect of an LED lamp is improved.
In order to solve the technical problems, the utility model provides an anti-surge and non-afterglow LED driving circuit, which comprises: the device comprises a surge absorption circuit, an EMI filter circuit, a rectifying circuit, an anti-surge integrated circuit U1, an output filter circuit and an output ripple removing circuit;
the surge absorption circuit and the EMI filter circuit are sequentially connected between the commercial power and the alternating current input end of the rectifying circuit; the direct current output end of the rectifying circuit is connected with the switching power supply and controls the switching-off and switching-on of a switching device in the switching power supply so as to connect or disconnect the LED load with the direct current output end of the rectifying circuit;
the output filter circuit comprises an electrolytic capacitor CE1 and a bleeder resistor R2 which are connected in parallel between the anode and the cathode of the LED load; the bleeder resistor R2 is used for providing a bleeder circuit for the electrolytic capacitor CE1 when the switching device is turned off;
the ripple removing circuit is used for reducing ripple voltages at two ends of the led load;
the high-voltage starting pin of the anti-surge integrated circuit U1 is connected to the direct-current output positive electrode of the rectifying circuit, the two DRAIN pins are connected with the negative electrode of the LED load through the power inductor L3, the Drain pins are internally provided with 600V MOS tubes, and the peak voltage at the two ends of the MOS tubes is controlled below 600V by adjusting the voltage of the output LED load.
In a preferred embodiment: and the direct current output end of the rectifying circuit is also connected with a pi-type filter.
In a preferred embodiment: the pi-type filter comprises a filter inductor L2, a capacitor CB1 and a capacitor CB2; the inductor is connected with a direct current output positive electrode of the rectifying circuit; the capacitor CB1 and the capacitor CB2 are respectively connected between two ends of the inductor L2 and the direct current output cathode of the rectifier bridge.
In a preferred embodiment: the ripple removing circuit comprises an electrolytic capacitor CE2, a switching tube MQ1, voltage stabilizing diodes D5, D6 and D7 and resistors R10 and R11;
the control electrode of the switching tube MQ1 is connected to the negative electrode of the LED load through a resistor R11 and an electrolytic capacitor CE2, and the switching tube MQ1 is connected between the direct current output positive electrode of the rectifier bridge and the positive electrode of the LED load; the control electrode of the switching tube MQ1 is also connected to the direct current output positive electrode of the rectifier bridge through the voltage stabilizing diodes D6 and D5, and the resistor R10 is connected with the voltage stabilizing diode D5 in parallel; the control electrode of the switching tube MQ1 is also connected to the anode of the LED load through a voltage stabilizing diode D7.
In a preferred embodiment: the anode of the zener diode D5 is connected with the direct current output anode of the rectifying circuit, the cathode of the zener diode D6 is connected with the cathode of the zener diode D6, and the anode of the zener diode D6 is connected with the cathode of the LED load through the electrolytic capacitor CE 2.
In a preferred embodiment: and the cathode of the voltage stabilizing diode D7 is connected with the control electrode of the switching tube MQ1, and the anode of the voltage stabilizing diode D is connected with the anode of the LED load.
In a preferred embodiment: the switching tube is a MOS tube, the source electrode of the switching tube is connected with the anode of the LED load, and the drain electrode of the switching tube is connected with the direct current output cathode of the rectifying circuit.
The utility model also provides an LED luminous assembly, which uses the driving circuit.
The utility model also provides an LED lamp, which is provided with the light-emitting component.
In a preferred embodiment: the LED lamp is a straight-tube type LED lamp
Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:
1. the utility model provides an anti-surge and non-afterglow LED driving circuit, which can easily pass the requirements of authentication lightning stroke projects through a built-in high-voltage MOS of an integrated circuit, wherein the chip is started and directly provided by bus voltage without starting a resistor, a peripheral circuit is simplified, meanwhile, a Drain pin is directly connected with an output LED through a power inductor, a 600V MOS tube is built in the Drain pin, the peak voltage at two ends of the MOS tube is controlled below 600V by adjusting the voltage of the output LED, in order to further improve the anti-surge capability of a power supply, a surge suppression device is added in front of a rectifier bridge, instant energy can be timely absorbed when lightning stroke occurs, the first time provides protection for the integrated circuit and other electronic devices, the peripheral circuit is designed simply, on one hand, the power supply can realize miniaturized design, the light emitting effect of a T8 lamp tube is greatly improved, the optical design problem is solved, meanwhile, the appearance is more compact, the production process is simplified, and the production cost and the material cost is reduced.
2. The utility model provides an anti-surge and non-afterglow LED driving circuit, which is characterized in that when mains supply is input, an EMI filter circuit is used for removing a power grid noise signal, then a rectifying circuit is used for rectifying alternating current into direct current, a switching device in a switching power supply is turned off and on, energy is transmitted to an LED load end, an electrolytic capacitor in the output filter circuit is used for storing energy and stabilizing the current value of an LED load and the voltage at two ends of the LED load, bleeder resistors are connected in parallel at the two ends of the electrolytic capacitor, a bleeder circuit is provided for energy in the electrolytic capacitor when a lamp is turned off, the voltage at two ends of the LED load is reduced in an extremely short time, a ripple removing circuit is added at the load end, ripple voltage at two ends of the LED load is reduced, and when the output voltage is lower than the LED working voltage, the afterglow phenomenon of the LED cannot occur.
Drawings
Fig. 1 is a circuit diagram of a preferred embodiment of the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.
In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," configured to, "" engaged with, "" connected to, "and the like are to be construed broadly, and may be, for example," connected to, "wall-mounted," connected to, removably connected to, or integrally connected to, mechanically connected to, electrically connected to, directly connected to, or indirectly connected to, through an intermediary, and may be in communication with each other between two elements, as will be apparent to those of ordinary skill in the art, in view of the detailed description of the terms herein.
Referring to fig. 1, the present embodiment provides an anti-surge, non-afterglow LED driving circuit, which is characterized by comprising: the device comprises a surge absorption circuit, an EMI filter circuit, a rectifying circuit, an anti-surge integrated circuit U1, an output filter circuit and an output ripple removing circuit;
the surge absorption circuit and the EMI filter circuit are sequentially connected between the commercial power and the alternating current input end of the rectifying circuit; the direct current output end of the rectifying circuit is connected with the switching power supply and controls the switching-off and switching-on of a switching device in the switching power supply so as to connect or disconnect the LED load with the direct current output end of the rectifying circuit; the output filter circuit comprises an electrolytic capacitor CE1 and a bleeder resistor R2 which are connected in parallel between the anode and the cathode of the LED load; the bleeder resistor R2 is used for providing a bleeder circuit for the electrolytic capacitor CE1 when the switching device is turned off; the ripple removing circuit is used for reducing ripple voltages at two ends of the led load;
the high-voltage starting pin of the anti-surge integrated circuit U1 is connected to the direct-current output positive electrode of the rectifying circuit, the two DRAIN pins are connected with the negative electrode of the LED load through the power inductor L3, the Drain pins are internally provided with 600V MOS tubes, and the peak voltage at the two ends of the MOS tubes is controlled below 600V by adjusting the voltage of the output LED load.
According to the afterglow-free LED driving circuit, the requirements of lightning stroke project can be easily met through the built-in high-voltage MOS of the integrated circuit, the chip is started and directly provided by bus voltage, starting resistance is not needed, a peripheral circuit is simplified, meanwhile, a Drain pin is directly connected with an output LED through a power inductor, a 600VMOS tube is built in the Drain pin, the voltage of the output LED is adjusted, the peak voltage at two ends of the MOS tube is controlled below 600V, in order to further improve the anti-surge capacity of a power supply, a surge suppression device is added in front of a rectifier bridge, instant energy can be absorbed in time when lightning stroke occurs, protection is provided for the integrated circuit and other electronic devices in the first time, the peripheral circuit is designed to be simple, on one hand, the power supply can achieve miniaturization design, the luminous effect of a T8 lamp tube is greatly improved, the optical design problem is solved, on the other hand, the appearance is more compact, the production process is simplified, and the production and material cost is reduced.
When mains supply is input, the circuit of the embodiment passes through the EMI filter circuit, removes power grid noise signals, rectifies alternating current into direct current through the rectification circuit, turns off and turns on a switching device in a switching power supply, transmits energy to an LED load end, and plays roles in storing energy and stabilizing a current value of a LED load and voltages at two ends of the LED load through an electrolytic capacitor in the output filter circuit, and a bleeder resistor is connected in parallel at two ends of the electrolytic capacitor.
The discharge time of the electrolytic capacitor is in direct proportion to the resistance value of the discharge resistor and the discharge capacitance value, so that the discharge time is shortened, the capacitance value and the discharge resistor are as small as possible, the storage energy of the electrolytic capacitor is reduced, and the discharge current is improved. In this embodiment, in the output filter circuit, when 220V is input, the two ends of the electrolytic capacitor CE1 start to charge, after the voltage V0 at the two ends of the electrolytic capacitor CE1 is 67V, that is, the voltage at the two ends of the LED load after the stabilization, when the input is disconnected, the electrolytic capacitor CE1 discharges through the bleeder resistor R2 bleeder resistor, when the voltage Vt at the two ends of the load is reduced to 60V, the LED lamp is turned off, the capacitance value of the electrolytic capacitor CE1 is 150uF, and the bleeder resistor value is 100K, so the CE1 discharging time can be calculated by the following formula:
t=rcln [ V0/Vt ], where Ln () is the base logarithm of e;
after substituting the above parameters, t=100×3x150uf×e-6×ln [67/60] =1.4s can be obtained
From the above, the LED is completely extinguished after 1.4s at the moment of power failure, and no afterglow phenomenon occurs.
In this embodiment, the dc output end of the rectifying circuit is further connected to a pi-type filter. Specifically, the pi-type filter includes a filter inductance L2, a capacitance CB1, and a capacitance CB2; the inductor is connected with a direct current output positive electrode of the rectifying circuit; the capacitor CB1 and the capacitor CB2 are respectively connected between two ends of the inductor L2 and the direct current output cathode of the rectifier bridge.
Because the capacitance value of the electrolytic capacitor CE1 is smaller, the output filtering effect is directly affected, the LED load is easy to generate larger ripple voltage, and the ripple voltage can be absorbed by the ripple removing circuit, so that the ripple voltage is controlled within a reasonable range, the stroboscopic problem is solved, and the service life of the LED product is ensured. In this embodiment, the ripple removing circuit includes an electrolytic capacitor CE2, a switching tube MQ1, voltage stabilizing diodes D5, D6, D7, and resistors R10, R11; the grid electrode of the switching tube MQ1 is connected to the negative electrode of the LED load through a resistor R11 and an electrolytic capacitor CE2, and the drain electrode and the source electrode of the switching tube MQ1 are connected between the direct current output positive electrode of the rectifier bridge and the positive electrode of the LED load; the grid electrode of the switching tube MQ1 is also connected to the direct current output anode of the rectifier bridge through voltage stabilizing diodes D6 and D5, and the resistor R10 is connected with the voltage stabilizing diode D5 in parallel; the control electrode of the switching tube MQ1 is also connected to the anode of the LED load through a voltage stabilizing diode D7. The anode of the zener diode D5 is connected with the direct current output anode of the rectifying circuit, the cathode of the zener diode D6 is connected with the cathode of the zener diode D6, and the anode of the zener diode D6 is connected with the cathode of the LED load through the electrolytic capacitor CE 2. And the cathode of the voltage stabilizing diode D7 is connected with the control electrode of the switching tube MQ1, and the anode of the voltage stabilizing diode D is connected with the anode of the LED load.
In the ripple removing circuit, when the voltage of the front stage is higher than the average value, the electrolytic capacitor CE2 is charged through D5 and D6, when the voltage of the front stage is lower than the average value, at this time, the electrolytic capacitor CE2 discharges through D6 and R10 to maintain Vds, and meanwhile, the Vds is maintained through R11, so that the front stage trough section of Q1 is still kept in the constant current region, D7 is a protection device, and the MOS transistor GS is prevented from being over-voltage, that is, the electrolytic capacitor CE2 is charged in the input current crest section and discharged in the trough section, the complementary maintenance MOS can work in the constant current region in the whole period, and the value of D6 can be reduced under the same stroboscopic effect, thereby reducing loss. Therefore, the CE1 electrolytic capacitor can be smaller in value, ripple voltage is reduced through the ripple eliminating circuit, the problem of power-off afterglow of the LED lamp is solved, and the problem of large output ripple caused by the small value of the CE1 electrolytic capacitor is also solved.
The driving circuit described above can be used to drive various LED chips to light up, and thus can be applied to various LED lamps such as a straight tube type LED lamp and the like.
The foregoing is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present utility model within the scope of the present utility model disclosed herein by this concept, which falls within the actions of invading the protection scope of the present utility model.
Claims (10)
1. An anti-surge and non-afterglow LED drive circuit is characterized by comprising: the device comprises a surge absorption circuit, an EMI filter circuit, a rectifying circuit, an anti-surge integrated circuit U1, an output filter circuit and an output ripple removing circuit;
the surge absorption circuit and the EMI filter circuit are sequentially connected between the commercial power and the alternating current input end of the rectifying circuit; the direct current output end of the rectifying circuit is connected with the switching power supply and controls the switching-off and switching-on of a switching device in the switching power supply so as to connect or disconnect the LED load with the direct current output end of the rectifying circuit;
the output filter circuit comprises an electrolytic capacitor CE1 and a bleeder resistor R2 which are connected in parallel between the anode and the cathode of the LED load; the bleeder resistor R2 is used for providing a bleeder circuit for the electrolytic capacitor CE1 when the switching device is turned off;
the ripple removing circuit is used for reducing ripple voltages at two ends of the led load;
the high-voltage starting pin of the anti-surge integrated circuit U1 is connected to the direct-current output positive electrode of the rectifying circuit, the two DRAIN pins are connected with the negative electrode of the LED load through the power inductor L3, the Drain pins are internally provided with 600V MOS tubes, and the peak voltage at the two ends of the MOS tubes is controlled below 600V by adjusting the voltage of the output LED load.
2. An anti-surge, non-afterglow LED driver circuit as defined in claim 1, wherein: and the direct current output end of the rectifying circuit is also connected with a pi-type filter.
3. An anti-surge, non-afterglow LED driver circuit as defined in claim 2, wherein: the pi-type filter comprises a filter inductor L2, a capacitor CB1 and a capacitor CB2; the inductor is connected with a direct current output positive electrode of the rectifying circuit; the capacitor CB1 and the capacitor CB2 are respectively connected between two ends of the inductor L2 and the direct current output cathode of the rectifier bridge.
4. An anti-surge, non-afterglow LED driver circuit as defined in claim 1, wherein: the ripple removing circuit comprises an electrolytic capacitor CE2, a switching tube MQ1, voltage stabilizing diodes D5, D6 and D7 and resistors R10 and R11;
the control electrode of the switching tube MQ1 is connected to the negative electrode of the LED load through a resistor R11 and an electrolytic capacitor CE2, and the switching tube MQ1 is connected between the direct current output positive electrode of the rectifier bridge and the positive electrode of the LED load; the control electrode of the switching tube MQ1 is also connected to the direct current output positive electrode of the rectifier bridge through the voltage stabilizing diodes D6 and D5, and the resistor R10 is connected with the voltage stabilizing diode D5 in parallel; the control electrode of the switching tube MQ1 is also connected to the anode of the LED load through a voltage stabilizing diode D7.
5. The anti-surge and non-afterglow LED driver circuit of claim 4, wherein: the anode of the zener diode D5 is connected with the direct current output anode of the rectifying circuit, the cathode of the zener diode D6 is connected with the cathode of the zener diode D6, and the anode of the zener diode D6 is connected with the cathode of the LED load through the electrolytic capacitor CE 2.
6. The anti-surge and non-afterglow LED driver circuit of claim 4, wherein: and the cathode of the voltage stabilizing diode D7 is connected with the control electrode of the switching tube MQ1, and the anode of the voltage stabilizing diode D is connected with the anode of the LED load.
7. The anti-surge and non-afterglow LED driver circuit of claim 4, wherein: the switching tube is a MOS tube, the source electrode of the switching tube is connected with the anode of the LED load, and the drain electrode of the switching tube is connected with the direct current output cathode of the rectifying circuit.
8. An LED lighting assembly characterized in that the drive circuit of any one of claims 1-7 is used.
9. An LED luminaire characterized by being equipped with a light emitting assembly as claimed in claim 8.
10. The LED light fixture of claim 9 wherein: the LED lamp is a straight-tube type LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222984566.5U CN219124395U (en) | 2022-11-07 | 2022-11-07 | Anti-surge and non-afterglow LED driving circuit, luminous component and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222984566.5U CN219124395U (en) | 2022-11-07 | 2022-11-07 | Anti-surge and non-afterglow LED driving circuit, luminous component and LED lamp |
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| CN219124395U true CN219124395U (en) | 2023-06-02 |
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| CN202222984566.5U Active CN219124395U (en) | 2022-11-07 | 2022-11-07 | Anti-surge and non-afterglow LED driving circuit, luminous component and LED lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117524795A (en) * | 2024-01-05 | 2024-02-06 | 深圳市华浩德电子有限公司 | Control circuit without current and spark during contact action of non-afterglow BUCK output relay |
-
2022
- 2022-11-07 CN CN202222984566.5U patent/CN219124395U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117524795A (en) * | 2024-01-05 | 2024-02-06 | 深圳市华浩德电子有限公司 | Control circuit without current and spark during contact action of non-afterglow BUCK output relay |
| CN117524795B (en) * | 2024-01-05 | 2024-04-16 | 深圳市华浩德电子有限公司 | Control circuit without current and spark during contact action of non-afterglow BUCK output relay |
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