CN211406368U - Controllable startup time setting circuit for LED driving power supply - Google Patents
Controllable startup time setting circuit for LED driving power supply Download PDFInfo
- Publication number
- CN211406368U CN211406368U CN201922364743.8U CN201922364743U CN211406368U CN 211406368 U CN211406368 U CN 211406368U CN 201922364743 U CN201922364743 U CN 201922364743U CN 211406368 U CN211406368 U CN 211406368U
- Authority
- CN
- China
- Prior art keywords
- circuit
- driving
- capacitor
- charging
- time setting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a controllable start time setting circuit for LED drive power supply, include: the LED lamp comprises a driving circuit for driving the LED to emit light, a control circuit for controlling the driving circuit to start and a charging circuit; one end of the driving circuit is connected with the alternating current output circuit, the control circuit is connected with the driving circuit through the first driving field effect transistor, and the charging circuit comprises a capacitor charging link and a self-powered link. The lighting control circuit can automatically control the lighting starting time of the lamp, reduce the static loss of the circuit while controlling the lighting starting time, and increase the efficiency of the circuit.
Description
Technical Field
The utility model relates to a circuit, concretely relates to controllable start time setting circuit for LED drive power supply.
Background
With the continuous expansion of LED lighting applications, more and more LED lighting occasions need to flexibly set the LED startup time. For example, in large-scale factory workshop lighting, all lamps are controlled by a knife switch, and if all lamps are set to be started at the same time, a great current transient impact is generated on a power grid or a knife, which generally causes the power supply quality of other electric appliances in the same power grid branch to be reduced, such as instantaneous interruption, surge and the like. Therefore, the lighting starting time of the lamp needs to be automatically controlled through circuit design, so that the transient impact of current is reduced, the interference to a power grid is reduced, and the service lives of the switch knife and the lighting lamp can be prolonged.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a controllable start time setting circuit for LED drive power supply, its illumination time of opening that equally can automatic control lamps and lanterns reduces the static loss of circuit in the time of control opening moreover, increases the work efficiency of circuit, low cost, and the practicality is stronger.
In order to solve the technical problem, the utility model provides a controllable start time setting circuit for LED drive power supply, include: the LED lamp comprises a driving circuit for driving the LED to emit light, a control circuit for controlling the driving circuit to start and a charging circuit; one end of the driving circuit is connected with the alternating current output circuit, and the control circuit is connected with the driving circuit through the first driving field effect transistor;
the charging circuit comprises a capacitor charging link and a self-powered link;
the capacitor charging link comprises a second driving field effect transistor with a drain electrode connected to the alternating current output circuit, the source electrode of the second driving field effect transistor is connected with the collector electrode of the first transistor, and the emitter electrode of the first transistor is connected with the first charging capacitor through a second resistor; the self-powered link comprises a second charging capacitor, and the second charging capacitor is sequentially connected in series with the cathode of the Schottky diode, the fourth resistor and the base of the second transistor; the first charging capacitor is connected with the second charging capacitor in series through the cathode of a second unidirectional diode, the collector of the second transistor is connected with the base of the first transistor, and the second charging capacitor is connected with the driving circuit through the cathode of the first unidirectional diode;
the control circuit is connected between the first charge capacitor and the cathode of the second unidirectional diode.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that a gate and a drain of the second driving fet are connected to the first resistor, and the gate of the second driving fet is located between the first resistor and the first schottky diode, which are connected in series with each other.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that the driving circuit includes a transformer primary winding number, a transformer secondary winding number and an auxiliary winding transformer, one end of the transformer secondary winding number is connected to the alternating current output circuit, and the auxiliary winding transformer is connected to the second charging capacitor via an anode of the first unidirectional diode.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that two ends of the primary turn number of the transformer are respectively connected to a capacitor and a forward direction of a unidirectional diode, the capacitor and the unidirectional diode are connected in series, the forward direction of the unidirectional diode is connected to a drain electrode of the first driving field effect transistor, and the capacitor is connected in parallel to a load.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that the number of turns of the secondary winding of the transformer is connected in parallel with an electrolytic capacitor, and the electrolytic capacitor is connected in parallel with the LEDnAnd n is not less than 1, the number of secondary turns of the transformer is connected with the anode of the one-way diode, and the electrolytic capacitor is connected with the cathode of the one-way diode.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that the control circuit includes a control IC, a GATE terminal of the control IC is connected to a GATE of the first driving fet, a FB terminal of the control IC is connected to a position between the auxiliary winding transformer and an anode of the first unidirectional diode after being connected to a load, and a VDD terminal of the control IC is connected to a position between the first charging capacitor and an anode of the second unidirectional diode.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that the alternating current output circuit includes two groups of four voltage stabilizing diodes connected in parallel, the voltage stabilizing diodes are connected in parallel with a capacitor, the capacitor is connected in parallel with an alternating current output port, and a reverse direction of the voltage stabilizing diode is connected with a drain electrode of the second driving field effect transistor.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that a collector and a base of the first transistor are connected to a third resistor.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that the first driving field effect transistor and the second driving field effect transistor are both N-channel insulated gate field effect transistors.
Preferably, the controllable turn-on time setting circuit for the LED driving power supply is characterized in that the first transistor and the second transistor are NPN type or PNP type.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses set up the electric capacity link of charging, after the circuit inserts the alternating current, the electric capacity link of charging is opened, charge to first charging capacitor according to the resistance value of second resistance, after the voltage at first charging capacitor both ends reaches control IC's starting voltage, open by control IC control drive circuit, the resistance of second resistance is the smaller then LED's start-up time is shorter more, start self-power link after self-drive circuit opens, then can puncture the second schottky diode, then the second transistor switches on, first transistor is closed, isolated second resistance, the accessible changes the resistance of second resistance and adjusts the time that LED opened, and can not bring loss and efficiency problem.
2. The utility model discloses a set up first transistor and second transistor, when one is the on-state, another is the high resistance state by its anti-inclined to one side, and electric capacity charging link blocks when realizing switching on of switch-on circuit, and vice versa, realization mode is simple, low cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
Examples
Referring to fig. 1, the utility model discloses a controllable start time setting circuit for LED drive power supply, include:
the LED lamp comprises a driving circuit 2 for driving an LED to emit light, a control circuit 3 for controlling the driving circuit to start and a charging circuit 1; one end of the drive circuit 2 is connected to an ac output circuit, and the control circuit 3 is connected to the drive circuit 2 via a first drive fet M1.
The charging circuit 1 comprises a capacitor charging link and a self-powered link;
the capacitor charging link is used for charging a first charging capacitor C8, and includes a second driving fet M2 having a drain connected to an ac output circuit, a source of the second driving fet M2 is connected to a collector of a first transistor Q1, and an emitter of the first transistor Q1 is connected to a first charging capacitor C8 through a second resistor R2.
The drain of the second driving fet M2 is connected to an ac output circuit, which includes two sets of four zener diodes connected in parallel to each other, the zener diodes being connected in parallel to a capacitor, the capacitor being connected in parallel to an ac output port, the zener diodes being connected in reverse to the drain of the second driving fet M2. The voltage stabilizing diodes are used for stabilizing the voltage in the circuit, and the capacitor can improve the voltage quality in the circuit, cut off direct current and reduce the circuit loss.
When the ac power enters the capacitor charging link, the second mosfet M2 and the first transistor Q1 are turned on, and the first charging capacitor C8 is charged according to the resistance of the second resistor R2. The output loss of the first transistor Q1 is small, and the voltage is applied to the second resistor R2, so that the circuit loss can be reduced.
The self-power supply link comprises a second charging capacitor C3, and the second charging capacitor C3 is connected in series with the cathode of a second schottky diode ZD2, a fourth resistor R4 and the base of a second transistor Q2 in sequence; the first charging capacitor C8 is connected in series to the second charging capacitor C3 through the negative electrode of a second unidirectional diode D2, the collector of the second transistor Q2 is connected to the base of the first transistor Q1, and the second charging capacitor C3 is connected to the driving circuit 2 through the negative electrode of a first unidirectional diode D2.
The second unidirectional diode D2 is used to prevent the potential of the first charging capacitor C8 from being transferred to the second charging capacitor C3.
When the self-power supply link is formed, the second charging capacitor C3 breaks down the second schottky diode ZD2, the second transistor Q2 is turned on, and the first transistor Q1 is turned off, so that the capacitor charging link is turned off, and the path of the second resistor R2 is blocked.
The gate and the drain of the second driving fet M2 are connected to a first resistor R1, and the gate of the second driving fet M2 is located between the first resistor R1 and the first schottky diode ZD1, which are connected in series. The second driving fet M2, the first resistor R1, and the first schottky diode ZD1 may form a low-loss voltage regulator, that is, when the drain of the second driving fet M2 is connected to the power grid, a stable dc voltage source identical to the first schottky diode ZD1 is generated at the source of the second driving fet M2, the output voltage is fixed, and the resistance of the second resistor R2 affects the output current.
The driving circuit 2 includes a transformer primary winding Np, a transformer secondary winding Ns, and an auxiliary winding transformer Naux, one end of the transformer secondary winding Np is connected to an alternating current output circuit, and the auxiliary winding transformer Naux is connected to the second charging capacitor C3 via an anode of a first unidirectional diode D1.
The two ends of the primary turn number Np of the transformer are respectively connected with a capacitor and the forward direction of a one-way diode, the capacitor and the one-way diode are connected in series, the forward direction of the one-way diode is connected with the drain electrode of the first driving field effect transistor M1, and the capacitor is connected with a load in parallel.
The number of secondary turns Np of the transformer is connected with an electrolytic capacitor in parallel, and the electrolytic capacitor is connected with an LED in paralleln(n ≧ 1), the secondary winding number Np of the transformer is connected to a positive electrode of a one-way diode, and the electrolytic capacitor is connected to a negative electrode of the one-way diode.
The electrolytic capacitor is used for reducing alternating current ripple coefficient so as to improve high-efficiency smooth direct current output.
The control circuit 1 includes a control IC, in which a GATE terminal of the control IC is connected to a GATE of the first driving fet M1, a FB terminal is connected to a load and then connected between the auxiliary winding transformer Naux and an anode of the first unidirectional diode D1, and a VDD terminal is connected between the first charging capacitor C8 and an anode of the second unidirectional diode D2.
The design is such that when the voltage across the first charging capacitor C8 reaches the start voltage of the control IC, the control IC directly issues a command to start the self-power supply link.
When the voltage of the first charging capacitor C8 reaches the start voltage of the control IC, the GATE controls the first driving fet M1 to turn on, so as to start the driving circuit 2, and the LED lamp is turned on, and at the same time, the self-power supply link is started, and the path of the second resistance R2 is closed.
The working principle of the circuit is as follows: when the circuit is connected with alternating current, the capacitor charging link is started, the first charging capacitor C8 is charged according to the resistance value of the second resistor R2, when the voltage of the first charging capacitor C8 reaches the starting voltage of the control IC, the control IC controls the driving circuit 2 to be started, the smaller the resistance value of the second resistor R2 is, the shorter the starting time of the LED is, the second Schottky diode ZD2 can be broken down after the self-power supply link is started, the second transistor Q2 is conducted, the first transistor Q1 is closed, the second resistor R2 is isolated, the starting time of the LED can be adjusted by changing the resistance value of the second resistor R2, and the problems of loss and efficiency can not be caused. Put one against the three, the accessible the utility model discloses a circuit decides in proper order and opens the time of LED, solves all lamps and lanterns and all set up and start at the same time and produce the problem that very big electric current transient state was strikeed to electric wire netting or plug-in strip, and simple and practical has spreading value.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A controllable on-time setting circuit for an LED driving power supply, comprising:
the LED lamp comprises a driving circuit for driving the LED to emit light, a control circuit for controlling the driving circuit to start and a charging circuit; one end of the driving circuit is connected with the alternating current output circuit, and the control circuit is connected with the driving circuit through the first driving field effect transistor;
the charging circuit comprises a capacitor charging link and a self-powered link;
the capacitor charging link comprises a second driving field effect transistor with a drain electrode connected to the alternating current output circuit, the source electrode of the second driving field effect transistor is connected with the collector electrode of the first transistor, and the emitter electrode of the first transistor is connected with the first charging capacitor through a second resistor; the self-powered link comprises a second charging capacitor, and the second charging capacitor is sequentially connected in series with the cathode of the Schottky diode, the fourth resistor and the base of the second transistor; the first charging capacitor is connected with the second charging capacitor in series through the cathode of a second unidirectional diode, the collector of the second transistor is connected with the base of the first transistor, and the second charging capacitor is connected with the driving circuit through the cathode of the first unidirectional diode;
the control circuit is connected between the first charge capacitor and the cathode of the second unidirectional diode.
2. The controllable on-time setting circuit for LED driving power of claim 1, wherein said second driving fet has its gate and drain connected to a first resistor, and said second driving fet has its gate between said first resistor and a first schottky diode connected in series.
3. The controllable on-time setting circuit for an LED driving power supply according to claim 1, wherein said driving circuit comprises a transformer primary number of turns, a transformer secondary number of turns, and an auxiliary winding transformer, one end of said transformer secondary number of turns being connected to an alternating current output circuit, said auxiliary winding transformer being connected to said second charging capacitor via an anode of a first unidirectional diode.
4. The controllable on-time setting circuit for the LED driving power supply according to claim 3, wherein two ends of the primary winding of the transformer are respectively connected to a capacitor and a forward direction of a unidirectional diode, the capacitor and the unidirectional diode are connected in series, the forward direction of the unidirectional diode is connected to the drain of the first driving fet, and the capacitor is connected in parallel to the load.
5. The controllable on-time setting circuit for LED driving power of claim 3, wherein said transformer secondary turns are connected in parallel with an electrolytic capacitor, said electrolytic capacitor is connected in parallel with LEDnAnd n is not less than 1, the number of secondary turns of the transformer is connected with the anode of the one-way diode, and the electrolytic capacitor is connected with the cathode of the one-way diode.
6. A controllable on-time setting circuit for LED driving power supply as claimed in claim 3, wherein said control circuit comprises a control IC, a GATE terminal of said control IC is connected to the GATE of the first driving fet, a FB terminal is connected to the load and then connected between said auxiliary winding transformer and the anode of the first unidirectional diode, and a VDD terminal is connected to the first charging capacitor and the anode of the second unidirectional diode.
7. The controllable on-time setting circuit for an LED driving power supply according to claim 1, wherein said ac output circuit comprises two sets of four zener diodes connected in parallel with each other, said zener diodes being connected in parallel with a capacitor, said capacitor being connected in parallel with an ac output port, and a reverse direction of said zener diode being connected to a drain of said second driving fet.
8. The controllable on-time setting circuit for an LED driving power supply according to claim 1, wherein a collector and a base of said first transistor are connected to a third resistor.
9. The controllable on-time setting circuit for an LED driving power supply according to claim 1, wherein said first and second driving fets are N-channel insulated gate fets.
10. The controllable on-time setting circuit for an LED driving power supply according to claim 1, wherein the first transistor and the second transistor are NPN type or PNP type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922364743.8U CN211406368U (en) | 2019-12-25 | 2019-12-25 | Controllable startup time setting circuit for LED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922364743.8U CN211406368U (en) | 2019-12-25 | 2019-12-25 | Controllable startup time setting circuit for LED driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211406368U true CN211406368U (en) | 2020-09-01 |
Family
ID=72208945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922364743.8U Active CN211406368U (en) | 2019-12-25 | 2019-12-25 | Controllable startup time setting circuit for LED driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211406368U (en) |
-
2019
- 2019-12-25 CN CN201922364743.8U patent/CN211406368U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1868284B1 (en) | Driver arrangement for LED lamps | |
| US9860958B2 (en) | Dimming drive circuit of alternating current directly-driven LED module | |
| US20100295478A1 (en) | Led driving circuit | |
| CN109769321B (en) | LED lamp circuit with delayed light-off function | |
| US11528791B2 (en) | Driving circuit | |
| CN204031553U (en) | A kind of LED drive circuit and soft starting circuit thereof | |
| CN104883799A (en) | Control method, control circuit, and system for LED driving and LED lamp | |
| CN205071365U (en) | Emitting diode lighting drive circuit and lamps and lanterns | |
| CN204392656U (en) | LED drive circuit and LED switch driving power | |
| CN214101867U (en) | Overvoltage protection circuit | |
| CN114143933A (en) | Circuit structure for realizing no afterglow after LED lamp is turned off | |
| CN211406368U (en) | Controllable startup time setting circuit for LED driving power supply | |
| CN102823329A (en) | Photosensor circuits including a current amplifier | |
| CN104869686A (en) | Driving circuit and illuminating device comprising same | |
| CN216353865U (en) | WIFI wall switch circuit based on magnetic latching relay and thyristor | |
| CN114678830A (en) | Low-power-consumption dimming circuit and power supply method thereof | |
| CN215222552U (en) | Power-taking circuit of intelligent control box | |
| KR101289326B1 (en) | Power supply device for light sources, such as halogen lamps, and related method | |
| CN112437521B (en) | Intelligent back-edge dimming device based on MOSFET | |
| CN109287032B (en) | Christmas lamp based on power grid frequency timing control | |
| CN202551464U (en) | Wide-voltage LED lamp control circuit | |
| CN104955225A (en) | Combined protective logic amplification type blue light LED lamp protection system | |
| CN214413083U (en) | Discharge time prolonging circuit for emergency lighting of floating type LED lamp tube | |
| JP7444009B2 (en) | Lighting devices and luminaires | |
| CN213938392U (en) | Single live wire power-taking circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |