CN211090042U - L ED silicon controlled rectifier light-adjusting power supply - Google Patents
L ED silicon controlled rectifier light-adjusting power supply Download PDFInfo
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- CN211090042U CN211090042U CN201922274188.XU CN201922274188U CN211090042U CN 211090042 U CN211090042 U CN 211090042U CN 201922274188 U CN201922274188 U CN 201922274188U CN 211090042 U CN211090042 U CN 211090042U
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Abstract
The utility model provides an L ED silicon controlled rectifier power of adjusting luminance, including input rectification filter circuit, the PWM controller, the control circuit of adjusting luminance, a transformer, and output rectification filter circuit, the positive pole of input rectification filter circuit's output is connected with the multiplier input pin of the PWM controller, the positive pole loops through first electric capacity, first MOS pipe is connected with the drive control signal pin of PWM controller, the positive pole is connected with the one end of the primary coil of transformer, the other end of primary coil passes through the second MOS pipe and is connected with the MOS pipe source signal pin of PWM controller, the secondary coil and the output rectification filter circuit of transformer are connected, the coupling has auxiliary winding on the secondary coil, auxiliary winding is connected with the power supply pin of PWM controller in order to supply power to the PWM controller, the utility model discloses utilize the PWM controller can adjust the luminance and the regulation of light, in order to improve the light and make it accord with the requirement of scene illumination, have more comfortable, the colour temperature, the characteristics of safety, energy-conservation, health and suitable luminous environment.
Description
Technical Field
The utility model relates to an L ED power field, in particular to L ED silicon controlled rectifier power of adjusting luminance.
Background
In recent years, with the rise of L ED commercial lighting market worldwide, numerous L ED manufacturers including China put L ED commercial lighting products at an important position for market development, and since requirements on aspects of high efficiency, long service life, high power factor, flexible expansion, dimmable performance and the like are provided for L ED lighting products by major markets such as Europe and America and the like, L ED driving ICs and power supply industries face a new revolution, and therefore, the application proportion of intelligent dimming of silicon controlled dimming power supplies, particularly in commercial lighting, is expected to be rapidly improved in two years in the future.
The MPS4056 brand is adopted in the design, a controller can realize single-stage active Power Factor Correction (PFC) to be used as a main circuit of a control chip, the control is simple, a peripheral circuit is mature, the conduction loss is reduced (so that the efficiency is improved) and the EMI characteristic is reduced, a smaller input EMI filter can meet the EMI standard after the EMI characteristic is reduced, the external high-voltage power MOSFET switching frequency jitter function can further reduce the filtering requirement, the reduction of the size of the input EMI filter means that the resistive impedance of a driving circuit is reduced along with the reduction of the resistive impedance, the important benefit is that the input current oscillation can be greatly reduced, the stability can be further enhanced, and for the dimmable application, the addition of the active attenuation circuit and the bleeder circuit can ensure that a L ED lamp can stably work in an extremely wide dimming range without any flicker.
Compared with the traditional lighting mode, L ED lighting improves the high quality of light, improves the light source efficiency and prolongs the service life of the lamp, and the function of silicon controlled rectifier dimming can adjust the brightness and the color temperature of the lamp, creates the lighting environment and energy-saving application, so that L ED lighting becomes the mainstream technology in the 21 st century, and a great number of L ED lighting lamp standards and specifications continue to emerge.
SUMMERY OF THE UTILITY MODEL
The utility model provides an L ED silicon controlled rectifier power of adjusting luminance to solve at least one above-mentioned technical problem.
In order to solve the above problem, the utility model provides an aspect of the utility model provides an L ED silicon controlled rectifier light-adjusting power supply, including input rectification filter circuit, PWM controller, dimming control circuit, transformer and output rectification filter circuit, the positive pole of input rectification filter circuit's output is connected with the multiplier input pin of PWM controller, the positive pole loops through first electric capacity, first MOS pipe and is connected with the drive control signal pin of PWM controller, the positive pole is connected with one end of the primary coil of transformer, the other end of primary coil pass through the second MOS pipe with the MOS pipe source signal pin of PWM controller is connected, the secondary coil of transformer with output rectification filter circuit connects, secondary coil goes up the coupling and has auxiliary winding, auxiliary winding with the power supply pin of PWM controller is connected in order to supply power to the PWM controller.
Preferably, the positive electrode is connected with the drain electrode of the first MOS transistor sequentially through the first capacitor, the source electrode of the first MOS transistor is grounded, and the gate electrode of the first MOS transistor is connected with the drive control signal pin of the PWM controller.
Preferably, the positive electrode is connected with a multiplier input pin of the PWM controller through a resistor.
Preferably, the other end of the primary coil is connected to a drain of the second MOS transistor, a source of the second MOS transistor is connected to a signal pin of a source of the MOS transistor of the PWM controller, and the anode is connected to a gate of the second MOS transistor.
Preferably, the first end of the auxiliary winding is connected with a collector of a triode after rectification and filtering, an emitter of the triode is connected with a power supply pin of the PWM controller, and a base of the triode is grounded through a voltage regulator tube.
Preferably, the output rectifying and filtering circuit comprises a diode, a first end of the secondary coil is connected with an L ED positive electrode driving terminal through the diode, a second end of the secondary coil is connected with a L ED negative electrode driving terminal, a first electrolytic capacitor is connected between the L ED positive electrode driving terminal and the L ED negative electrode driving terminal, and the first end of the secondary coil is connected with the positive electrode of the first electrolytic capacitor sequentially through a second capacitor and a first resistor.
Preferably, the PWM controller is of the type MP 4056.
Since the technical scheme is used, the utility model discloses utilize the PWM controller can adjust the luminance and the colour temperature of light to improve the requirement that light made it accord with the scene illumination, have more comfortable, cheap, safe, energy-conserving, healthy and suitable luminous environment's characteristics.
Drawings
Fig. 1 schematically shows a circuit schematic of the invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The utility model discloses an aspect provides a L ED silicon controlled rectifier dimming power supply, including input rectification filter circuit, PWM controller U1, dimming control circuit, transformer T1 and output rectification filter circuit, the positive pole of input rectification filter circuit's output is connected with PWM controller U1's multiplier input pin, the positive pole loops through first electric capacity CBB2, first MOS pipe Q1 and is connected with PWM controller's drive control signal pin, the positive pole is connected with one end of transformer T1's primary coil, the other end of primary coil passes through second MOS pipe Q2 and is connected with PWM controller's MOS pipe source signal pin, transformer T1's secondary coil with output rectification filter circuit is connected, the coupling has auxiliary winding T1_ VCC on the secondary coil, auxiliary winding T1_ VCC with PWM controller U1's power supply pin is connected with to PWM controller U1 power supply, preferably, PWM controller U402's VCC is MP 6851, the first pin is the third power supply pin, the third power supply pin is MP 2, the third power supply pin is the current compensation chip, the third power supply pin is the third power supply pin, the third power supply pin is the third.
Referring to fig. 1, a 180-plus 240V ac power is input into an input rectifying filter circuit, is converted into a dc power by EMC filtering and enters a rectifying bridge, and then enters a dimming control circuit and the primary side of a transformer, the dimming control circuit simultaneously generates a signal to be provided to a multiplier signal input pin (i.e., pin 1) of a PWM controller U1, a 5 th pin (MOS transistor source signal pin) of the PWM controller U1 generates a control signal for controlling the on/off control of a second MOS transistor Q2, the primary coil is connected to the second MOS transistor Q2, so that the output of the secondary coil of the transformer T1 can be controlled, and the output of the secondary coil of the transformer T1 is provided to an L ED light source after being processed by an output rectifying filter circuit.
When the input rectifying and filtering circuit works, alternating current passes through color wheel inductors L1 and L2 from L and N, is rectified by a rectifier bridge BD1 after a capacitor CX1, and is subjected to EMC suppression by an I-shaped inductor L3 and a patch inductor L4.
Since the technical scheme is used, the utility model discloses utilize PWM controller U1 can adjust the luminance and the colour temperature of light to improve the requirement that light made it accord with the scene illumination, have more comfortable, cheap, safe, energy-conserving, healthy and suitable luminous environment's characteristics.
In the dimming control circuit, the positive electrode is connected with the drain of the first MOS transistor Q1 through the first capacitor CBB2 in sequence, the source of the first MOS transistor Q1 is grounded, and the gate of the first MOS transistor Q1 is connected with the 4 th pin (drive control signal pin) of the PWM controller, preferably, the positive electrode is connected with the 1 st pin (multiplier input pin) of the PWM controller U1 through resistors R20 and R21, during operation, after being rectified by an input rectifying and filtering circuit, the alternating current is provided to the 1 st pin (multiplier input pin) of the PWM controller U1 through resistors R20 and R21, thereby providing reference for a current comparator and an inductor current inside the PWM controller U1, the inductor current forms a sine wave in phase with an input line voltage, the PWM controller U1 can realize a single-stage active Power Factor Correction (PFC), the maximum output voltage to the current comparator is 2.3V to limit cycle current, the minimum output voltage is 0.03V, so as to ensure that the dimming signal is supplied to a stable voltage at intervals of the first MOS transistor Q drive resistor p 1, so as to control the first MOS transistor Q19, and to control the dimming transistor Q, so as to reduce the voltage of the first capacitor Q drive signal, and to control the dimming transistor Q3642, and to control the dimming signal output voltage of the dimming transistor Q3642, so as to reduce the voltage of the dimming control circuit, and to control the dimming transistor Q drive transistor Q, so as to increase the dimming control the dimming transistor Q drive signal, and to control the dimming transistor Q drive transistor Q, so as to control circuit.
Preferably, the other end of the primary winding is connected to the drain of the second MOS transistor Q2, the source of the second MOS transistor Q2 is connected to the 5 th pin (MOS transistor source signal pin) of the PWM controller, and the positive electrode is connected to the gate of the second MOS transistor Q2. The power supply of the PWM controller is provided by an auxiliary winding T1_ VCC, preferably, a first end of the auxiliary winding T1_ VCC is connected to a collector of a transistor Q3 after rectification and filtering, an emitter of the transistor Q3 is connected to a 3 rd pin (power supply pin) of the PWM controller U1, and a base of the transistor Q3 is grounded through a voltage regulator ZD 2.
Preferably, the output rectifying and filtering circuit comprises a diode D6, a first end of the secondary coil is connected with L ED positive electrode driving terminal L ED + through the diode D6, a second end of the secondary coil is connected with L ED negative electrode driving terminal L ED-, a first electrolytic capacitor EC2 is connected between the L ED positive electrode driving terminal L ED + and the L ED negative electrode driving terminal L ED-, and a first end of the secondary coil is connected with the positive electrode of the first electrolytic capacitor EC2 through a second capacitor C8 and a first resistor R23 in sequence.
Referring to fig. 1, the power provided by the auxiliary winding T1_ VCC is rectified and filtered by the chip resistor R16, the chip diode D4, and the chip capacitor C6, then forms a linear voltage regulator by the voltage regulator ZD2, the triode Q3, and the chip resistor R14, and supplies power to the 3 rd pin (power supply pin) VCC of the PWM controller U1 after filtering and energy storage by the electrolytic capacitor EC 1. In operation, the signal is stored by the rectified input voltage applied to the transformer T1 during the second MOS transistor Q2 operation time, and linearly increases from zero to a peak value. When the second MOS transistor Q2 is turned off, the diode D6 is turned on and the energy stored in the transformer T1 is transferred to the load. The energy storage inductor current of transformer T1 then begins to drop linearly from peak to zero. The auxiliary winding T1_ VCC is coupled to the secondary of the transformer T1 to supply the 3 rd pin VCC of the PWM controller U1 for start signal detection.
The utility model has the characteristics of it is following: (1) the voltage 180-265V design is compatible with the requirements of power grids in different countries; (2) the long-life Hunan Aihua RS series aluminum electrolytic capacitor with the temperature of 105 ℃ being 10000 hours and the long service life is adopted, the aluminum electrolytic capacitor is used for a long time, is energy-saving and environment-friendly, and achieves the quality guarantee of 3 years (25000 hours); (3) the silicon controlled dimming power supply is designed, the power supply works at 180-265 voltage, the efficiency factor is high, and EMC is exceeded; (4) the high-voltage lightning protection design can achieve 2000V of surge voltage resistance.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An L ED silicon controlled rectifier dimming power supply is characterized by comprising an input rectification filter circuit, a PWM controller (U1), a dimming control circuit, a transformer (T1) and an output rectification filter circuit, wherein the positive electrode of the output end of the input rectification filter circuit is connected with an input pin of a multiplier of the PWM controller (U1), the positive electrode is connected with a drive control signal pin of the PWM controller sequentially through a first capacitor (CBB2) and a first MOS (Q1), the positive electrode is connected with one end of a primary coil of the transformer (T1), the other end of the primary coil is connected with a MOS (MOS) source signal pin of the PWM controller through a second MOS (Q2), a secondary coil of the transformer (T1) is connected with the output rectification filter circuit, an auxiliary winding (T1_ VCC) is coupled to the secondary coil, and the auxiliary winding (T1_ VCC) is connected with a power supply pin of the PWM controller (U1) to supply power to the PWM controller (U1).
2. The L ED SCR dimming power supply of claim 1, wherein the positive electrode is sequentially connected to the drain of the first MOS transistor (Q1) through the first capacitor (CBB2), the source of the first MOS transistor (Q1) is grounded, and the gate of the first MOS transistor (Q1) is connected to the driving control signal pin of the PWM controller.
3. The L ED SCR dimming power supply of claim 1, wherein the positive terminal is connected to a multiplier input pin of the PWM controller (U1) through a resistor.
4. The L ED SCR dimming power supply of claim 1, wherein the other end of the primary winding is connected to the drain of the second MOS transistor (Q2), the source of the second MOS transistor (Q2) is connected to the source signal pin of the PWM controller, and the positive electrode is connected to the gate of the second MOS transistor (Q2).
5. The L ED SCR dimming power supply of claim 1, wherein the first terminal of the auxiliary winding (T1_ VCC) is rectified and filtered, and then connected to the collector of a transistor (Q3), the emitter of the transistor (Q3) is connected to the power supply pin of the PWM controller (U1), and the base of the transistor (Q3) is grounded through a voltage regulator (ZD 2).
6. The L ED SCR dimming power supply of claim 1, wherein the output rectifying-filtering circuit comprises a diode (D6), the first end of the secondary coil is connected to a L ED positive driving terminal (L ED +) through the diode (D6), the second end of the secondary coil is connected to a L ED negative driving terminal (L ED-), a first electrolytic capacitor (EC2) is connected between the L ED positive driving terminal (L ED +) and the L ED negative driving terminal (L ED-), and the first end of the secondary coil is connected to the positive electrode of the first electrolytic capacitor (EC2) through a second capacitor (C8) and a first resistor (R23) in turn.
7. The L ED SCR dimmer power supply of claim 1, wherein the PWM controller (U1) is model MP 4056.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922274188.XU CN211090042U (en) | 2019-12-17 | 2019-12-17 | L ED silicon controlled rectifier light-adjusting power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922274188.XU CN211090042U (en) | 2019-12-17 | 2019-12-17 | L ED silicon controlled rectifier light-adjusting power supply |
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| CN211090042U true CN211090042U (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114040557A (en) * | 2021-11-04 | 2022-02-11 | 中船重工安谱（湖北）仪器有限公司 | Array type dielectric barrier glow discharge device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114040557A (en) * | 2021-11-04 | 2022-02-11 | 中船重工安谱（湖北）仪器有限公司 | Array type dielectric barrier glow discharge device |
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