CN218416744U - High-voltage stroboflash-free LED drive circuit - Google Patents
High-voltage stroboflash-free LED drive circuit Download PDFInfo
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- CN218416744U CN218416744U CN202221743492.XU CN202221743492U CN218416744U CN 218416744 U CN218416744 U CN 218416744U CN 202221743492 U CN202221743492 U CN 202221743492U CN 218416744 U CN218416744 U CN 218416744U
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Abstract
The utility model relates to a LED drive technical field, concretely relates to high pressure does not have stroboscopic LED drive circuit, this drive circuit include power module, rectifier module, filter module, drive control module, output inductance and the on-off controller that concatenates in proper order, the on-off controller includes drain electrode pin D, source electrode pin S, feedback input pin FB and bypass pin BP, the output inductance connect in parallel in source electrode pin S with between rectifier circuit' S the burden output. An object of the utility model is to provide a no stroboscopic LED drive circuit of high pressure need not to set up constant current constant voltage protection circuit or set up at primary and secondary limit and adopt the opto-coupler device on keeping apart the output, and simple structure and cost are lower.
Description
Technical Field
The utility model relates to a LED drive technical field, concretely relates to high pressure does not have stroboscopic LED drive circuit.
Background
The LED lamp has the advantages of energy conservation, long service life, high efficiency and the like, is a novel green and environment-friendly light source, is usually suitable for various occasions such as industrial and mining lamps, UFO indoor and outdoor high-power LED lamps and the like, and can be normally used only by being driven by an LED driving circuit.
At present, an applied LED drive circuit generally rectifies mains supply, a power factor calibration circuit is added for reducing EMC and current harmonic, rectified direct-current voltage is boosted, and then isolated and output through a PWM circuit, in order to obtain stable direct current, a constant-current constant-voltage protection circuit is also added on an isolation output end, or in order to achieve higher control precision of current, an optocoupler device is adopted for primary and secondary isolation, use cost is increased, the circuit output current control precision of the optocoupler device circuit is poor without adopting the optocoupler device circuit, detection resistors and more various devices are adopted for output current detection, the circuit is complex, circuit cost is increased, and circuit reliability is low.
Disclosure of Invention
In order to overcome the shortcoming and the deficiency that exist among the prior art, the utility model aims to provide a high pressure does not have stroboscopic LED drive circuit, need not to set up constant current constant voltage protection circuit or set up on primary and secondary limit and adopt the opto-coupler device on keeping apart the output, and simple structure and cost are lower.
The utility model discloses a realize through following technical scheme:
the utility model provides a high pressure does not have stroboscopic LED drive circuit, includes power module, rectifier module, filter module, drive control module, output inductance and the on-off controller that concatenates in proper order, the on-off controller includes drain electrode pin D, source electrode pin S, feedback input pin FB and bypass pin BP, the output inductance connect in parallel between source electrode pin S and rectifier circuit' S negative output terminal.
Wherein, the switch controller is internally provided with an MOST tube.
And a bypass capacitor is connected between the bypass pin BP and the source electrode pin S.
The filtering module is a pi-type filter, and the drain electrode pin D and the source electrode pin S are connected in series on the output end of the pi-type filter.
And a freewheeling diode is connected in series between the output inductor and the output module.
The drive control module comprises a drive IC with the model number of JW1221A or SOT 23-6.
The utility model has the advantages that:
the utility model discloses a high pressure does not have stroboscopic LED drive circuit is connected with switch controller through the electricity in output inductance department, and switch controller passes through the utility model discloses a circuit connection sets up and can realize carrying out work with the mode of open-loop, has ensured to provide constant current for the load, carries out the energy replenishment by every switch cycle to load current output, need not adopt output filter capacitance, and LED invariable is luminous and not have the stroboscopic, just the utility model discloses a circuit structure is simple, and the reliability is high, and the cost is lower.
Drawings
The present invention is further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without inventive work.
Fig. 1 is a schematic circuit diagram of the present invention.
Reference numerals
The power supply module comprises a power supply module-101, a rectification module-102, a filtering module-103, a driving control module-104, an output module-105, an output inductor-106 and a switch controller-107.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.
The LED lamp has the advantages of energy conservation, long service life, high efficiency and the like, is a novel green environment-friendly light source, is often suitable for various occasions such as mining lamps, UFO indoor and outdoor high-power LED lamps and the like, and can be normally used only by being driven by an LED driving circuit.
At present, the applied LED driving circuit generally rectifies the mains supply, a power factor calibration circuit is added for reducing EMC and current harmonics, the rectified dc voltage is boosted, then isolated and output through a PWM circuit, in order to obtain a stable dc current, a constant current and constant voltage protection circuit is added on the isolated output end, or in order to realize higher control precision of the current, an optical coupler device is used for primary and secondary isolation, the use cost is increased, the circuit output current control precision is poorer without adopting the optical coupler device circuit, and a detection resistor and more various devices are used for detecting the output current, the circuit is complex, the circuit cost is increased, and the circuit reliability is low.
In order to solve the above problems, this embodiment discloses a high-voltage non-stroboscopic LED driving circuit, which includes a power supply module 101, a rectification module 102, a filtering module 103, a driving control module 104, an output module 105, an output inductor 106, and a switch controller 107 that are connected in series in sequence, where the switch controller 107 includes a drain pin D, a source pin S, a feedback input pin FB, and a bypass pin BP, the output inductor 106 is connected in parallel between the source pin S and a negative output end of the rectification circuit, and a bypass capacitor is connected between the bypass pin BP and the source pin S.
Specifically, the no stroboscopic LED drive circuit of high pressure of this embodiment is connected with switch controller 107 through being connected electrically in output inductance 106 department, and switch controller 107 passes through the utility model discloses a circuit connection sets up and can realize carrying out work with the mode of open-loop, has ensured to provide constant current for the load, carries out the energy replenishment by every switching cycle to load current output, need not adopt output filter electric capacity, and LED invariable is luminous and not have the stroboscopy, just the utility model discloses a circuit structure is simple, and the reliability is high, and the cost is lower.
Specifically, the switch controller 107 is provided with a MOST tube therein, which can increase the operation stability of the switch controller 107.
Specifically, the filtering module 103 is a pi-type filter, the drain pin D and the source pin S are connected in series to an output terminal of the pi-type filter, and the pi-type filter has a long service life and a good stability.
Specifically, a freewheeling diode is connected in series between the output inductor 106 and the output module 105, and the freewheeling diode can change more gently, thereby avoiding the occurrence of surge voltage and protecting the circuit structure of the present invention.
Specifically, the driving control module 104 includes a driving IC with a model of JW1221A or SOT23-6, and the PFC of JW1221A or SOT23-6 is higher, more suitable for the present invention.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The utility model provides a stroboscopic LED drive circuit is not had to high pressure, includes power module, rectifier module, filtering module, drive control module and the output module who concatenates in proper order, its characterized in that: the rectifier module further comprises an output inductor and a switch controller, wherein the switch controller comprises a drain electrode pin D, a source electrode pin S, a feedback input pin FB and a bypass pin BP, and the output inductor is connected between the source electrode pin S and the negative output end of the rectifier module in parallel.
2. The high-voltage non-strobe LED driving circuit according to claim 1, wherein: an MOST tube is arranged in the switch controller.
3. The high-voltage non-stroboscopic LED driving circuit according to claim 1, characterized in that: and a bypass capacitor is connected between the bypass pin BP and the source electrode pin S.
4. The high-voltage non-strobe LED driving circuit according to claim 1, wherein: the filtering module is a pi-type filter, and the drain electrode pin D and the source electrode pin S are connected to the output end of the pi-type filter in series.
5. The high-voltage non-strobe LED driving circuit according to claim 1, wherein: and a freewheeling diode is connected in series between the output inductor and the output module.
6. The high-voltage non-strobe LED driving circuit according to claim 1, wherein: the driving control module comprises a driving IC with the model number of JW1221A or SOT 23-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221743492.XU CN218416744U (en) | 2022-07-07 | 2022-07-07 | High-voltage stroboflash-free LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221743492.XU CN218416744U (en) | 2022-07-07 | 2022-07-07 | High-voltage stroboflash-free LED drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218416744U true CN218416744U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221743492.XU Active CN218416744U (en) | 2022-07-07 | 2022-07-07 | High-voltage stroboflash-free LED drive circuit |
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| Country | Link |
|---|---|
| CN (1) | CN218416744U (en) |
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2022
- 2022-07-07 CN CN202221743492.XU patent/CN218416744U/en active Active
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