CN217643782U - Multi-type dimming LED power supply - Google Patents
Multi-type dimming LED power supply Download PDFInfo
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- CN217643782U CN217643782U CN202221697307.8U CN202221697307U CN217643782U CN 217643782 U CN217643782 U CN 217643782U CN 202221697307 U CN202221697307 U CN 202221697307U CN 217643782 U CN217643782 U CN 217643782U
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Abstract
The utility model relates to the technical field of lamp power supplies, in order to solve the technical problem that the dimming signal of the existing dimming LED power supply is single, the utility model discloses a multi-type dimming LED power supply, which outputs a first direct current through a filter circuit, and a primary control circuit for reducing the voltage of the first direct current and adjusting the power factor, and a dimming circuit for performing PWM control on the primary control circuit; the dimming circuit is trinity dimming circuit, and dimming circuit includes dimming interface controller, and dimming interface controller's output passes through the opto-coupler and is connected with primary control circuit, and dimming interface controller's the light signal input that becomes is connected with external dimming signal through diode D9. Through setting up trinity dimmer circuit, the outside dimming signal of three kinds of different grade types of adaptation can be changed into output PWM signal with it, has realized the dimming signal of a section power adaptation different grade type, has solved the single problem of dimming signal.
Description
Technical Field
The utility model relates to a lamps and lanterns power technical field especially relates to a polymorphic type LED power of adjusting luminance.
Background
People's life and work can not leave the illumination, and wherein LED illumination is as the mainstream, needs different light sources to different demands, has appeared LED power of adjusting luminance from this. The LED dimming power supply is also called as an LED sectional dimming power supply, external dimming signals are multiple, and the dimming signal of the existing LED dimming power supply is single and cannot be compatible with common dimming signals on the market.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a polymorphic type LED power of adjusting luminance to solve the single technical problem of the LED power signal of adjusting luminance of current adjusting luminance.
In order to achieve the above object, the utility model discloses a specific technical scheme of polymorphic type LED power of adjusting luminance as follows:
a multi-type dimming LED power supply comprises a rectifying circuit and a filtering circuit, wherein the rectifying circuit and the filtering circuit are used for rectifying and filtering mains supply, and a first direct current is output through the filtering circuit; a primary control circuit for a first direct current voltage reduction and power factor adjustment; a dimming circuit for performing PWM control on the primary control circuit; the dimming circuit is a three-in-one dimming circuit, the dimming circuit comprises a dimming interface controller, the output end of the dimming interface controller is connected with a primary control circuit through an optical coupler, the emission of the optical coupler is connected to a reference ground, the grounding end of the dimming interface controller is connected to an analog ground, the current setting end of the dimming interface controller is connected to the analog ground through a resistor, the dimming signal input end of the dimming interface controller is connected with the anode of a diode D9, the cathode of the diode D9 is connected with an external dimming signal, and the cathode of the diode D9 is grounded through a capacitor C15.
Through setting up trinity dimmer circuit, the external dimming signal of three kinds of different grade types of can the adaptation to convert it into output PWM signal, the external dimming signal can be 0 to 10V direct current linear dimming, 0 to 100% duty cycle PWM (pulse width modulation) signal or simple resistance potentiometer, has realized the dimming signal of a section power adaptation different grade type, has solved the single problem of dimming signal.
Furthermore, the primary control circuit comprises a voltage reduction PFC controller and a dial control circuit used for adjusting the power output, the dial control circuit comprises a dial switch, one side of the dial switch is connected to a reference ground, and the other side of the dial switch is connected with a current detection end of the voltage reduction PFC controller through a resistor R12 and a resistor R13. By setting the dial switch, the resistance to ground of the current detection end of the buck PFC controller U1 can be changed so as to adjust the output current and thus the output power. Solves the problem that one lamp can only match with the LED power supply with corresponding power due to the non-adjustable current,
further, the primary control circuit comprises a transformer T1 and a switching tube Q4 driven by a buck PFC controller, the driving end of the buck PFC controller is connected with the gate of the switching tube Q4 through a resistor R14, the resistor R14 is connected in parallel with a diode D4, the cathode of the diode D4 is connected with the driving end, the anode of the diode D4 is connected with the gate of the switching tube Q4, the gate of the switching tube Q4 is grounded through a resistor R15, the source of the switching tube Q4 is connected to a reference ground through a current detection resistor, and the drain of the switching tube Q4 is connected with a coil T1B of the transformer T1.
Furthermore, one end of a coil T1A of the transformer T1 is connected to a reference ground, the other end of the coil T1A is connected with a collector of a switch tube Q1 through a diode D6, an emitter of the switch tube Q1 is connected with a power supply end of a voltage reduction PFC controller, a base of the switch tube Q1 is connected with a cathode of a voltage regulator tube Z2, and an anode of the voltage regulator tube Z2 is connected to the reference ground.
Furthermore, one end of a coil T1C of the transformer T1 is connected to an analog ground, the other end of the coil T1C is connected with a collector of a switch tube Q3 through a diode D7, an emitter of the switch tube Q3 is connected with a power supply end of a dimming interface controller U9, a base of the switch tube Q3 is connected with a cathode of a voltage regulator tube Z3, and an anode of the voltage regulator tube Z3 is connected to the analog ground.
The utility model provides a pair of polymorphic type LED power of adjusting luminance has following advantage:
through setting up trinity dimmer circuit, the outside dimming signal of three kinds of different grade types of can the adaptation to convert it into output PWM signal, realized the dimming signal of a section power adaptation different grade type, solved the problem that dimming signal is single, can compatible 0 ~ 10V light modulator, PWM light modulator and resistance light modulator. In addition, by setting the dial switch, the resistance to ground of the current detection end of the buck PFC controller U1 can be changed so as to adjust the output current and thus the output power. The problem that one lamp can only match with the LED power supply with corresponding power due to the fact that current is not adjustable is solved, inventory pressure is reduced, and the situation that lamps with different power can only use a special power supply with corresponding power in the prior art is changed.
Drawings
Fig. 1 is a functional block diagram of a multi-type dimming LED power supply provided by the present invention;
FIG. 2 is a structural diagram of an EMC circuit, a rectifier circuit and a filter circuit provided by the present invention;
FIG. 3 is a diagram of a primary control circuit structure provided by the utility model;
fig. 4 is the utility model provides a trinity dimming circuit structure chart.
In the figure: u1, a voltage reduction PFC controller; u9, a dimming interface controller; q2, an optical coupler; SW, dial switch; DC1, a first direct current; AG. A simulated ground; GND, ground reference.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 to 4, the utility model provides a pair of polymorphic type LED power of adjusting luminance, including being used for rectifier circuit and the filter circuit to mains rectification filtering, there is first direct current DC1 through filter circuit output, a primary control circuit for stepping down and the power factor adjustment to first direct current DC1, a dimming circuit for carrying out PWM control to primary control circuit, dimming circuit is trinity dimming circuit, dimming circuit includes dimming interface controller U9, dimming interface controller U9's output passes through opto-coupler Q2 and is connected with primary control circuit, external dimming signal passes through trinity dimming circuit, primary control circuit adjusts output voltage, realize the control of LED luminance.
The rectifying circuit is a bridge rectifying circuit formed by four diodes, and a filter circuit formed by a filter circuit inductor L1, a capacitor C2, a capacitor C3 and the like outputs a first direct current DC1. The first direct current DC1 is regulated by an output circuit and then outputs a second direct current, the second direct current is used for supplying power to the LED through an output interface CON4, and the output circuit includes a coil T1B of the transformer T1 and a common mode inductor T4.
Specifically, the 1 st end of the dimming interface controller U9 is a power supply end for inputting a power supply voltage; the 2 nd end is a grounding end and is used for being connected to an analog ground AG, and a filter capacitor C17 is arranged between the power end and the grounding end; the 3 rd end is a light-changing output end and is connected with the cathode of a light-emitting diode in the optocoupler Q2; the 4 th end is a current setting end, is connected to an analog ground AG through a resistor R22 and is used for setting the bias current of the 6 th end; the 5 th end is a clamping end; the 6 th end is a dimming input end and is connected with an external dimming signal through a diode D9, the 6 th end is respectively connected with the cathode of a voltage regulator tube Z4, the anode of the voltage regulator tube Z4 is connected to an analog ground AG, and the voltage regulator tube Z4 is connected with a capacitor C18 in parallel; in one embodiment, the 6 th terminal is connected to the anode of the diode D9 through the resistor R20, the cathode of the diode D9 is connected to the external dimming signal, and the anode of the diode D9 is grounded through the capacitor C15.
Dimming interface controller U9 can input three different types of dimming signals and convert them to output PWM signals, including 0 to 10V dc linear dimming, 0 to 100% duty cycle PWM (pulse width modulation) signals, and simple resistance potentiometers.
The positive pole of emitting diode passes through resistance R23 and inserts power VCC1 in the opto-coupler Q2, and the transmission of the phototriode in opto-coupler Q2 inserts ground reference GND, and the collecting electrode of the phototriode in opto-coupler Q2 passes through pull-up resistance R24 and inserts power VCC, and the collecting electrode of the phototriode in opto-coupler Q2 is connected with elementary control circuit.
The primary control circuit comprises a single-stage buck PFC controller used for LED dimming illumination and a switching tube Q4 driven by the single-stage buck PFC controller, wherein the 1 st end of the buck PFC controller is a loop compensation pin and is connected to a reference ground GND through a resistor R1 and a capacitor C6 in sequence to form an RC network so as to stabilize a control loop; and the 2 nd end is an inductive current zero-crossing detection end which receives the voltage of the auxiliary winding through a resistor voltage divider and an inductive current zero-crossing point, is respectively connected to the reference ground GND through a resistor R4 and a capacitor C8, and is connected to the reference ground GND through a resistor R5 and a coil T1A of a transformer T1 in sequence.
The terminal also provides both overvoltage protection and line conditioning modification functions. If the voltage on this pin is higher than Vzsc, ovp, the buck PFC controller U1 will enter an over-voltage protection mode, and good line regulation can be achieved by adjusting the upper resistance of the voltage divider.
The 5 th end is a driving end and is connected with the grid electrode of the switch tube Q4 through a resistor R14, the resistor R14 is connected with a diode D4 in parallel, the cathode of the diode D4 is connected with the 5 th end, the anode of the diode D4 is connected with the grid electrode of the switch tube Q4, and the grid electrode of the switch tube Q4 is grounded through a resistor R15;
the 3 rd terminal is a current detection terminal and is connected with the source of the switching tube Q4, and the source of the switching tube Q4 is connected to the ground GND through a current detection resistor (resistor R7, resistor R8 and resistor R11).
The 3 rd end and the 6 th end are respectively a grounding end and a power end, and the 6 th end is connected to a reference ground GND through a capacitor C5.
The 7 th terminal, the luminance control input terminal, is connected to ground GND through the bypass capacitor C4 so as to be perforated with the internal reference voltage.
And the 8 th end is a PWM dimming input end and is used for detecting a PWM dimming signal, is connected with the 3 rd end of the dimming interface controller U9 through an optocoupler Q2 and is directly connected with a collector of a phototriode in the optocoupler Q2.
Furthermore, in order to realize adjustable output power, the primary control circuit is also connected with a dial control circuit for adjusting power, the dial control circuit comprises a dial switch SW, one side of the dial switch SW is connected with the 3 rd end of the buck PFC controller U1 through a resistor R12 and a capacitor R13, and the other side of the dial switch SW is connected with a reference ground GND. The resistance to ground of the 3 rd terminal of the buck PFC controller U1 can be changed by the dip switch SW to regulate the output current and thus the output power.
In one embodiment, in the system power supply, the transformer T1 has three coils, including a coil T1A, a coil T1B and a coil T1C, the current flowing through the coil T1B changes, a voltage is induced from the coil T1A and the coil T1C and is output to the 6 th end of the buck PFC controller U1 and the 1 st end of the dimming interface controller U9, and the drain of the switching tube Q4 is connected to the coil T1B. One end of a coil T1A of the transformer is connected to a reference ground, the other end of the coil T1A is connected with a collector of a switch tube Q1 through a diode D6, an emitter of the switch tube Q1 is connected with a power supply end of a buck PFC controller, a base of the switch tube Q1 is connected with a cathode of a voltage regulator tube Z2, and an anode of the voltage regulator tube Z2 is connected to the reference ground. One end of a coil T1C of the transformer T1 is connected to an analog ground, the other end of the coil T1C is connected with a collector of a switch tube Q3 through a diode D7, an emitter of the switch tube Q3 is connected with a power supply end of a dimming interface controller U9, a base of the switch tube Q3 is connected with a cathode of a voltage regulator tube Z3, and an anode of the voltage regulator tube Z3 is connected to the analog ground.
Referring to fig. 2, in the commercial power input circuit, the 1 st end and the 2 nd end of the CON2 are used for connecting the live wire and the zero wire of the commercial power, F1 is a fuse, and F1 is connected in series to the live wire circuit, and when the rear-stage circuit fails to generate a large current, the fuse F1 is fused to provide a protection function. The rear stage of the fuse F1 is provided with a common mode inductor T2 and a common mode inductor T3, an X capacitor C1 for suppressing differential mode interference is arranged between the common mode inductor T2 and the common mode inductor T3, a resistor VR1 is arranged at the front stage of the common mode inductor T2, the VR1 is a piezoresistor and is respectively connected between a live wire and a zero line, the piezoresistor is a voltage limiting type protection device, and by utilizing the nonlinear characteristic of the piezoresistor, when an overvoltage appears between two poles of the piezoresistor, the piezoresistor can clamp the voltage to a relatively fixed voltage value, so that the protection of a rear stage circuit is realized. U2 is a diode bridge rectifier to rectify the ac voltage. The common mode inductor T2, the common mode inductor T3 and the X capacitor C1 form an EMC circuit.
To sum up, the utility model provides a pair of polymorphic type LED power of adjusting luminance through setting up trinity dimmer circuit, can adapt to the outside dimming signal of three kinds of different grade types to convert it into output PWM signal, realized the dimming signal of a section power adaptation different grade type, solved the single problem of dimming signal, can compatible 0 ~ 10V light modulator, PWM light modulator and resistance light modulator.
By setting the dial switch, the resistance to ground of the current detection end of the buck PFC controller U1 can be changed so as to adjust the output current and thus the output power. The problem that one lamp can only match with the LED power supply with corresponding power due to the fact that current is not adjustable is solved, inventory pressure is reduced, and the situation that lamps with different power can only use a special power supply with corresponding power in the prior art is changed.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A multi-type dimming LED power supply, comprising:
the rectifier circuit and the filter circuit are used for rectifying and filtering the commercial power, and a first direct current (DC 1) is output through the filter circuit;
a primary control circuit for step-down and power factor adjustment of a first direct current (DC 1);
a dimming circuit for performing PWM control on the primary control circuit;
its characterized in that, dimming circuit is trinity dimming circuit, dimming circuit is including adjusting luminance interface controller (U9), the output of adjusting luminance interface controller (U9) passes through opto-coupler (Q2) and is connected with primary control circuit, the transmission of opto-coupler (Q2) inserts reference Ground (GND), the earthing terminal of adjusting luminance interface controller (U9) inserts Analog Ground (AG), the electric current setting end of adjusting luminance interface controller (U9) inserts Analog Ground (AG) through resistance, the change light signal input part of adjusting luminance interface controller (U9) is connected with diode D9's positive pole, diode D9's negative pole and external dimming signal connection, and diode D9's negative pole passes through electric capacity C15 ground connection.
2. The multi-type dimming LED power supply according to claim 1, wherein the primary control circuit comprises a buck PFC controller (U1), and a dial control circuit for adjusting the power output is further provided, the dial control circuit comprises a dial Switch (SW), one side of the dial Switch (SW) is connected to a ground reference (GND), and the other side of the dial Switch (SW) is connected to a current detection end of the buck PFC controller (U1) through a resistor R12 and a resistor R13.
3. The multi-type dimming LED power supply according to claim 2, wherein the primary control circuit comprises a transformer T1 and a switch Q4 driven by a buck PFC controller (U1), the driving terminal of the buck PFC controller (U1) is connected to the gate of the switch Q4 through a resistor R14, the resistor R14 is connected in parallel with a diode D4, the cathode of the diode D4 is connected to the driving terminal, the anode of the diode D4 is connected to the gate of the switch Q4, the gate of the switch Q4 is grounded through a resistor R15, the source of the switch Q4 is connected to a ground reference (GND) through a current detection resistor, and the drain of the switch Q4 is connected to a coil T1B of the transformer T1.
4. The multi-type dimming LED power supply according to claim 3, wherein one end of a coil T1A of the transformer T1 is connected to a reference Ground (GND), the other end of the coil T1A is connected to a collector of a switch tube Q1 through a diode D6, an emitter of the switch tube Q1 is connected to a power supply end of a buck PFC controller (U1), a base of the switch tube Q1 is connected to a cathode of a regulator tube Z2, and an anode of the regulator tube Z2 is connected to the reference Ground (GND).
5. The multi-type dimming LED power supply according to claim 4, wherein one end of a coil T1C of the transformer T1 is connected to an Analog Ground (AG), the other end of the coil T1C is connected to a collector of a switch tube Q3 through a diode D7, an emitter of the switch tube Q3 is connected to a power supply end of the dimming interface controller (U9), a base of the switch tube Q3 is connected to a cathode of a regulator tube Z3, and an anode of the regulator tube Z3 is connected to the Analog Ground (AG).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221697307.8U CN217643782U (en) | 2022-06-30 | 2022-06-30 | Multi-type dimming LED power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221697307.8U CN217643782U (en) | 2022-06-30 | 2022-06-30 | Multi-type dimming LED power supply |
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| CN217643782U true CN217643782U (en) | 2022-10-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116546687A (en) * | 2023-07-07 | 2023-08-04 | 广东东菱电源科技有限公司 | Multi-machine parallel three-in-one current regulation anti-interference circuit |
-
2022
- 2022-06-30 CN CN202221697307.8U patent/CN217643782U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116546687A (en) * | 2023-07-07 | 2023-08-04 | 广东东菱电源科技有限公司 | Multi-machine parallel three-in-one current regulation anti-interference circuit |
| CN116546687B (en) * | 2023-07-07 | 2023-09-19 | 广东东菱电源科技有限公司 | Multi-machine parallel three-in-one current regulation anti-interference circuit |
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