CN104754803A - Efficient LED fluorescent lamp power supply - Google Patents
Efficient LED fluorescent lamp power supply Download PDFInfo
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- CN104754803A CN104754803A CN201310744027.7A CN201310744027A CN104754803A CN 104754803 A CN104754803 A CN 104754803A CN 201310744027 A CN201310744027 A CN 201310744027A CN 104754803 A CN104754803 A CN 104754803A
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Abstract
The invention is applicable to the field of LED power supplies and provides an LED driving power supply and an LED light source. The LED driving power supply comprises a rectification filter circuit, a dimming mode detection circuit, a remote control receiving module, a dummy load circuit, a main power converter, a secondary rectification filter circuit and a master control integrated circuit. The efficient LED fluorescent lamp power supply can automatically detect different types of dimmers so as to automatically select corresponding dimming modes and achieve the multiple-purpose effect through one lamp. The LED driving power supply can be suitable for phase cut type dimmers, key switch dimming and remote control dimming, and wire arrangement and installation of other LED driving power supplies are not needed.
Description
Technical field
The invention belongs to LED power field, particularly relate to a kind of LED drive power and LED light source.
Background technology
At present, cut type dimmer can only adapt to the incandescent lamp bulb of purely resistive, and use LED drive power can make the defective semiconductor devices of cut type dimmer, LED also there will be scintillation.Utilize key switch, control within the time in 3 seconds from being closed to again to open at every turn, the electricity-saving lamp being designed with this dimming function can enter brightness regulation pattern, but uses during LED and then can not carry out brightness adjustment control, only about with bright state.And remote control light modulating is applied to the control of outdoor city lighting lamp at present, general power and volume are all larger, can not be applied in the LED light source of room lighting smaller size smaller at all.
So when LED is applied in different dimming modes, need to redesign LED drive power, people also need when practical application to buy dissimilar LED light source respectively., all can change because of different dimmers or dimming mode in lamp installation and wiring meanwhile, bring very inconvenience and the wasting of resources to application.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of LED drive power, is intended to solve the problem of demand of remote control light modulating that existing LED drive power can not meet cut type dimmer, key switch light modulation and miniaturization indoor application simultaneously.
The embodiment of the present invention is achieved in that a kind of LED drive power, and described LED drive power comprises:
Current rectifying and wave filtering circuit, for carrying out rectifying and wave-filtering to input voltage, output dc voltage;
Light-modulating mode testing circuit, for detecting described direct voltage, exports light-modulating mode control signal;
Remote control reception module, for receiving remote control coding dim signal, output pulse width modulation signal;
Dummy load circuit, for providing dummy load when adopting cut type dimmer, exports dimmer voltage volt value;
Main power inverter, for the power of the duty ratio conversion direct voltage according to change;
Secondary commutation filter circuit, for carrying out rectifying and wave-filtering output to the voltage after described main power converters; And
Master control integrated circuit, for entering different light-modulating modes according to described light-modulating mode control signal or pulse width modulating signal, controlling described dummy load circuit and carrying out switching, adjust the duty ratio of described main power inverter.
Another object of the embodiment of the present invention is a kind of LED light source comprising above-mentioned LED drive power.
The embodiment of the present invention can detect different types of dimmer automatically, thus automatically select to enter corresponding light-modulating mode, reach the effect that a lamp is multiplex, use this LED drive power, go for cut type dimmer, connect key switch light modulation and remote control light modulating, wiring need not be changed and other LED drive power is installed.
Accompanying drawing explanation
Fig. 1 is the structure chart of the LED drive power that first embodiment of the invention provides;
Fig. 2 is that in the embodiment of the present invention, after the rectification of cut type dimmer, direct voltage output waveform and master control integrated circuit drive the output waveform schematic diagram of dummy load;
Fig. 3 is that in the embodiment of the present invention, key switch is opened and the waveform schematic diagram of closing institute's interval time;
Fig. 4 exports the waveform schematic diagram of 50% duty ratio to master control integrated circuit in the embodiment of the present invention;
Fig. 5 shows the structure chart of the LED drive power that second embodiment of the invention provides;
Fig. 6 shows the circuit diagram of the LED drive power that second embodiment of the invention provides.
Embodiment
In order to make object of the present invention, technological invention embodiment and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The embodiment of the present invention arranges light-modulating mode testing circuit and differentiates dimmer kind, remote control reception module is set and realizes remote control light modulating, master control integrated circuit enters different light-modulating modes according to the signal of light-modulating mode testing circuit or remote control reception module, control dummy load circuit, adjust the duty ratio of main power inverter, thus reach the effect of adjustment LED light source electric current and brightness.
Fig. 1 shows the structure of the LED drive power that first embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.
This LED drive power can be widely used in various LED light source, especially can be built in the LED light source of room lighting smaller size smaller, comprise rectifier filter 1, main power inverter 3, secondary commutation filter circuit 4, dummy load circuit 5, light-modulating mode testing circuit 6, remote control reception module 7 and master control integrated circuit 8.Wherein, thick line represents main circuit signal annexation, and the fine rule of band arrow represents detection control signal and direction thereof.
Be input between LED light source from power supply, be serially connected with rectifier filter 1, main power inverter 3 and secondary commutation filter circuit 4 successively.
The output of rectifier filter 1 is also connected to dummy load circuit 5 and light-modulating mode testing circuit 6.
The input of main power inverter 3 also connects master control integrated circuit 8.
The detection output signal of light-modulating mode testing circuit 6 and the control command signal of remote control reception module 7 are all connected to master control integrated circuit 8, and the output signal of master control integrated circuit 8 controls main power inverter 3 and dummy load circuit 5 respectively.
Power supply input comes from cut type dimmer or key switch, input voltage is through rectifier filter 1 rectification, output dc voltage, the direct voltage of light-modulating mode testing circuit 6 to input detects, obtain different waveforms, be input to master control integrated circuit 8, master control integrated circuit 8 judges to enter cut type light-modulating mode or key switch light-modulating mode with this.If remote control reception module 7 has control signal to export, then master control integrated circuit 8 enters remote control light modulating pattern.
Master control integrated circuit 8, according to the difference of light-modulating mode, controls dummy load circuit 5 in different ways and carries out switching, adjust the duty ratio of main power inverter 3, thus reaches the effect of adjustment LED light source electric current and brightness.
Main power inverter 3 is operated in switching mode, accepts the Duty ratio control of master control integrated circuit 8, carries out power conversion, export after secondary commutation filter circuit 4 carries out rectifying and wave-filtering the direct voltage of input.
The switch control rule that dummy load circuit 5 accepts master control integrated circuit 8 carries out switching, provides dummy load when adopting cut type dimmer, exports the reference of dimmer voltage volt value supply master control integrated circuit 8.
When adopting cut type dimmer, voltage after cut is input to current rectifying and wave filtering circuit 1, be rectified into direct voltage, the signal that light-modulating mode testing circuit 6 detects is one and has been cut the waveform signal of phase conduction angle, as shown in Fig. 2 waveform 1, this signal is input to master control integrated circuit 8, and master control integrated circuit 8 enters the cut type light-modulating mode of setting, and whole LED drive power system is activated work.Master control integrated circuit 8 generates drive singal according to the signal of input, as shown in the waveform 2 in Fig. 2, drives dummy load circuit 5 to work.When cut type dimmer has output, drive singal is low level, and dummy load accesses, and ensures that cut type dimmer normally works.Simultaneously, master control integrated circuit 8 is according to detected dimmer voltage volt value, and the duty ratio of the main power inverter 3 of corresponding adjustment, outputs to LED light source through secondary commutation filter circuit 4, regulate LED current and brightness, reach the effect of adjustment LED light source electric current and brightness.
When adopting key switch light modulation, civil power is rectified into direct voltage through current rectifying and wave filtering circuit 1, the signal that light-modulating mode testing circuit 6 detects is a sine wave signal, is input to master control integrated circuit 8, and master control integrated circuit 8 enters the sinusoidal wave mode circuit working of setting.Master control integrated circuit 8 exports maximum duty ratio to main power inverter 3, after secondary commutation filter circuit 4 rectification, output to LED light source, and now the electric current of LED light source and brightness are the brightest.Meanwhile, master control integrated circuit 8 is closed and is driven dummy load circuit 5.
When key switch is closed, LED light source extinguishes, if again by when opening key switch within 3 seconds, its signal waveform as shown in Figure 3, the duty ratio that master control integrated circuit 8 outputs to main power inverter 3 can adjust to 50%, LED light source electric current can decline 50%, and brightness also can be dimmed accordingly, as shown in Figure 4.When again repeating above being closed to and opening operation, the duty ratio that master control integrated circuit 8 outputs to main power inverter 3 can adjust to 30%, LED light source brightness also can be dimmed accordingly, according to 100% → 50% → 30% → 0% → 100% → ... circulation law carry out light modulation.
When adopting remote control light modulating, civil power is rectified into direct voltage through current rectifying and wave filtering circuit 1, and the signal that light-modulating mode testing circuit 6 detects is the sine wave signal of a mains frequency, input master control integrated circuit 8.Master control integrated circuit 8 enters the sinusoidal wave mode circuit working of setting, exports maximum duty ratio to main power inverter, outputs to LED light source through secondary commutation filter circuit 4, and now the electric current of LED light source and brightness are the brightest.Meanwhile, master control integrated circuit 8 is closed and is driven dummy load circuit 5.
When controlling LED drive power with remote control transmitter, often by a remote control transmitter, remote control reception module 7 can receive dim signal of encoding accordingly, export a pulse width modulation (Pulse Width Modulation, PWM) signal is to master control integrated circuit 8, master control integrated circuit 8 according to input pwm signal, the duty ratio of the main power inverter 3 of corresponding adjustment, the electric current of LED light source and brightness are changed with remote pilot, reaches the effect of light modulation.
Fig. 5 shows the structure of the LED drive power that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.
In the present embodiment, between rectifier filter 1 and main power inverter 3, increase circuit of power factor correction 2, by master control integrated circuit 8, it is controlled simultaneously.Circuit of power factor correction 2 receives the fixed frequency of master control integrated circuit 8 output, the signal of change in duty cycle, and make the conduction phase of electric current consistent with voltage, ON time is also corresponding to broaden, thus improves power factor, effectively realizes energy-conserving and environment-protective.
Fig. 6 shows the circuit structure of the LED drive power that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.
Rectifier filter 1 is made up of rectifier bridge 1 and electric capacity 2.
Power supply input output dc voltage after rectifier bridge 1 rectification, electric capacity 2 carries out filtering to this direct voltage.
Circuit of power factor correction 2 is made up of inductance 13, MOSFET 14, diode 15 and electrochemical capacitor 16.
Direct voltage anode is the input of circuit of power factor correction 2, and inductance 13 1 termination direct voltage anode, the anode of another terminating diode 15, the negative electrode of diode 15 is the output of circuit of power factor correction 2.
The source electrode of MOSFET 14 connects the anode of diode 15, and drain electrode connects direct current ground, and grid acceptor control integration circuit 8 controls.The negative electrode of the positive terminating diode 15 of electrochemical capacitor 16, negative terminal connects direct current ground.
Main power inverter 3 is made up of resistance 20, electric capacity 21, diode 22, MOSFET 23, resistance 24 and transformer winding 25-1.
Resistance 20 is in parallel with electric capacity 21, the output of a termination circuit of power factor correction 2, the negative electrode of a terminating diode 22.
The output of a transformer winding 25-1 mono-termination circuit of power factor correction 2, the anode of a terminating diode 22.
The source electrode of MOSFET 23 is connected with the anode of diode 22, drains through resistance 24 ground connection, and grid acceptor control integration circuit 8 controls.
Secondary commutation filter circuit 4 is made up of transformer secondary winding 25-2, diode 33 and electrochemical capacitor 34.
The anode of one terminating diode 33 of secondary winding 25-2, forms out-put supply positive pole through diode 33; The secondary winding 25-2 other end is out-put supply negative pole.
Electrochemical capacitor 34 is attempted by between out-put supply both positive and negative polarity, plays filtering voltage regulation effect.
Dummy load circuit 5 is made up of resistance 10, resistance 11 and MOSFET 12.
Dummy load circuit 5 is connected across between direct voltage anode and ground, resistance 10, resistance 11 and MOSFET 12 one-tenth series relationship, and the grid acceptor control integration circuit 8 of MOSFET 12 controls.
Light-modulating mode testing circuit 6 is made up of resistance 3, resistance 4, resistance 5, electric capacity 6, resistance 7, resistance 8, electrochemical capacitor 9.
Resistance 3, resistance 4, resistance 5 is in series with successively between direct voltage anode and ground.Electric capacity 6 is in parallel with resistance 5, and ungrounded end provides a signal to master control integrated circuit 8.
Resistance 7, resistance 8 is in series with successively between the common port and direct current ground of resistance 3, resistance 4.Electrochemical capacitor 9 is in parallel with resistance 8, negativing ending grounding, and anode provides a signal to master control integrated circuit 8.
Remote control reception module 7 is made up of remote control reception decoding chip 31 and diode 32.Can according to the remote-transmitter signal received by remote control reception decoding chip 31, the duty ratio of automatic regulation output pulsewidth, after receiving remote signal, delivers to master control integrated circuit 8 through diode.
Master control integrated circuit 8 is made up of power drives chip 17, resistance 18, resistance 19, Transformer Winding 25-3, electrochemical capacitor 26, diode 27, resistance 28, resistance 29, resistance 30.
Power drives chip 17 has dimmer species detection function; can according to different dimmer kinds being detected, the duty ratio of automatic regulation output pulsewidth, and there is overvoltage, overload, overpower and defencive function; external dimmer can be controlled by control, realize stepless and incremental dimming.
The pin 1 of power drives chip 17 outputs a control signal to the grid of MOSFET 12 in dummy load circuit 5.
The pin 2 of power drives chip 17 is connected to the ungrounded end of resistance 5 and electric capacity 6 in light-modulating mode testing circuit 6.
The pin 3 of power drives chip 17 is connected to the ungrounded end of resistance 8 and electric capacity 9 in light-modulating mode testing circuit 6.
The pin 4 of power drives chip 17 is through resistance 30 ground connection.
The pin 5 of power drives chip 17, through resistance 29 ground connection, is connected to pin 10 through resistance 28, diode 27 simultaneously.The anode connecting resistance 28 of diode 27, simultaneously through Transformer Winding 25-3 ground connection.The negative electrode of diode 27 is connected to pin 10, connects the positive pole of electrochemical capacitor 26 simultaneously.The minus earth of electrochemical capacitor 26.
The pin 6 of power drives chip 17 is connected to the common point of MOSFET 23 and resistance 24 in main power inverter 3.Pin 7 ground connection of power drives chip 17.
The pin 8 of power drives chip 17 outputs a control signal to the grid of MOSFET 23 in main power inverter 3.
The pin 9 of power drives chip 17 outputs a control signal to the grid of MOSFET 14 in circuit of power factor correction 2.
The pin 10 of power drives chip 17 receives the output of circuit of power factor correction 2 through resistance 19, resistance 18, connects the positive pole of electrochemical capacitor 26 simultaneously.
The positive pole of electrochemical capacitor 26 is connected to remote control reception module 7, for it provides power supply.
The embodiment of the present invention can detect different types of dimmer automatically, thus automatically select to enter corresponding light-modulating mode, reach the effect that a lamp is multiplex, use this LED drive power, go for cut type dimmer, key switch light modulation and remote control light modulating, wiring need not be changed and other LED drive power is installed.In addition, this LED drive power have also been devised circuit of power factor correction, makes power factor reach more than 0.85.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a LED drive power, is characterized in that, described LED drive power comprises: current rectifying and wave filtering circuit, for carrying out rectifying and wave-filtering to input voltage, output dc voltage; Light-modulating mode testing circuit, for detecting described direct voltage, exports light-modulating mode control signal; Remote control reception module, for receiving remote control coding dim signal, output pulse width modulation signal; Dummy load circuit, for providing dummy load when adopting cut type dimmer, exports dimmer voltage volt value; Main power inverter, for the power of the duty ratio conversion direct voltage according to change; Secondary commutation filter circuit, for carrying out rectifying and wave-filtering output to the voltage after described main power converters; And master control integrated circuit, for entering different light-modulating modes according to described light-modulating mode control signal or pulse width modulating signal, controlling described dummy load circuit and carrying out switching, adjust the duty ratio of described main power inverter.
2. LED drive power as claimed in claim 1, it is characterized in that, described LED drive power also comprises: circuit of power factor correction, for receiving the fixed frequency of described master control integrated circuit output, the signal of change in duty cycle, makes the conduction phase of electric current consistent with voltage.
3. LED drive power as claimed in claim 2, it is characterized in that, described circuit of power factor correction comprises inductance 13, MOSFET 14, diode 15 and electrochemical capacitor 16; One termination direct voltage anode of described inductance 13, the anode of diode 15 described in another termination, the negative electrode of described diode 15 is the output of described circuit of power factor correction; The source electrode of described MOSFET 14 connects the anode of described diode 15, and drain electrode connects direct current ground, and grid controls by described master control integrated circuit; The negative electrode of the positive terminating diode 15 of described electrochemical capacitor 16, negative terminal connects direct current ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310744027.7A CN104754803A (en) | 2013-12-30 | 2013-12-30 | Efficient LED fluorescent lamp power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310744027.7A CN104754803A (en) | 2013-12-30 | 2013-12-30 | Efficient LED fluorescent lamp power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105792416A (en) * | 2016-03-16 | 2016-07-20 | 浙江双宇电子科技有限公司 | Control circuit of switch light-dimming type LED lamp |
| CN112804797A (en) * | 2019-10-28 | 2021-05-14 | 松下知识产权经营株式会社 | Lighting device and lighting system with same |
| CN114567956A (en) * | 2022-03-09 | 2022-05-31 | 北京中瑞方兴科技有限公司 | Method and system for coping with light-load direct-current carrier signal distortion in direct-current lighting power supply |
-
2013
- 2013-12-30 CN CN201310744027.7A patent/CN104754803A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105792416A (en) * | 2016-03-16 | 2016-07-20 | 浙江双宇电子科技有限公司 | Control circuit of switch light-dimming type LED lamp |
| CN112804797A (en) * | 2019-10-28 | 2021-05-14 | 松下知识产权经营株式会社 | Lighting device and lighting system with same |
| CN112804797B (en) * | 2019-10-28 | 2024-02-09 | 松下知识产权经营株式会社 | Lighting device and lighting system with same |
| CN114567956A (en) * | 2022-03-09 | 2022-05-31 | 北京中瑞方兴科技有限公司 | Method and system for coping with light-load direct-current carrier signal distortion in direct-current lighting power supply |
| CN114567956B (en) * | 2022-03-09 | 2024-02-20 | 北京中瑞方兴科技有限公司 | Method and system for coping with light-load direct-current carrier signal distortion in direct-current illumination power supply |
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Application publication date: 20150701 |