CN110099476B - High-integration-level high-PF intelligent dimming circuit structure - Google Patents
High-integration-level high-PF intelligent dimming circuit structure Download PDFInfo
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- CN110099476B CN110099476B CN201810094823.3A CN201810094823A CN110099476B CN 110099476 B CN110099476 B CN 110099476B CN 201810094823 A CN201810094823 A CN 201810094823A CN 110099476 B CN110099476 B CN 110099476B
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- 239000003990 capacitor Substances 0.000 claims abstract description 42
- 238000004804 winding Methods 0.000 claims abstract description 10
- 101100464779 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CNA1 gene Proteins 0.000 claims description 12
- 101100464782 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CMP2 gene Proteins 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
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- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
Abstract
The invention discloses a high-integration-level high-PF intelligent dimming circuit structure which comprises an input end L, an input end N, a rectifier bridge BRG, a constant current chip U1, a signal generating chip U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, an inductor L1, a diode D2, a diode D3, a power switch tube M1, a power switch tube M2, an auxiliary winding AUX, an output end anode and an output end cathode. The beneficial effects are that: the PWM signal is realized by receiving a control signal of Bluetooth equipment such as a mobile phone and the like by U2 and converting the control signal into a pulse signal with constant high, constant low or 0-100% duty ratio, thereby achieving the purpose of intelligent dimming.
Description
Technical Field
The invention relates to the technical field of dimming circuits, in particular to a high-integration-level high-PF intelligent dimming circuit structure.
Background
The traditional fluorescent tube has high energy consumption and short service life, uses a plurality of heavy metal elements polluting the environment, is contrary to the great trend of environmental protection, gradually becomes a new green illumination alternative along with the high-speed development of the LED technology, gradually replaces the traditional fluorescent tube, and is far superior to the traditional illumination product in the aspects of light emitting principle, energy conservation and environmental protection. In order to adapt to the illumination brightness of different occasions, the dimming mode adopted by various manufacturers is layered endlessly, and the most used is to use the traditional silicon controlled rectifier dimmer and the remote controller to dim the LED lamp, so that not only the commercial power line is required to be reinstalled, but also a lot of cost is increased. In daily life, along with the change of the ambient brightness, the brightness of the lamp can be adjusted to meet the lighting requirement which must be achieved when people read by eyes. The traditional lamp dimming method is characterized in that the average power of a bulb is changed by manually adjusting a resistor and increasing and decreasing the current of a trigger electrode of a silicon controlled rectifier to control the output voltage, so that different brightness is obtained, the manual dimming is troublesome, and the dimming completely depends on the subjective perceptibility of a user, so that the brightness of the lamp cannot be adjusted to reasonable brightness to adapt to the change of the ambient brightness.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a high-integration-level high-PF intelligent dimming circuit structure to overcome the technical problems existing in the prior related art.
The technical scheme of the invention is realized as follows:
a high-integration high-PF intelligent dimming circuit structure comprises an input end L, an input end N, a rectifier bridge BRG, a constant current chip U1, a signal generating chip U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C6, an inductor L1, a diode D2, a diode D3, a power switch M1, a power switch tube M2, an auxiliary winding AUX, an output end positive electrode and an output end negative electrode, wherein the input end L is respectively connected with a first end of the rectifier bridge BRG and a positive electrode of the diode D2, the input end N is respectively connected with a third end of the rectifier bridge BRG and a positive electrode of the diode D3, a second end of the rectifier bridge BRG is grounded, a fourth end of the rectifier bridge BRG is respectively connected with a negative electrode of the diode D1, one end of the resistor R4, one end of the capacitor C4 and one end of the output end of the diode C4 are respectively connected with a positive electrode of the diode D1 and one end of the drain electrode of the diode D1, one end of the drain electrode of the diode D1 is respectively connected with the drain electrode of the diode D1 and the drain electrode of the diode D1, the other end of the diode D1 is respectively connected with the drain electrode of the resistor D1, the drain electrode of the diode D1 and the diode D1 respectively, the drain electrode of the resistor D1 is connected with the drain electrode of the drain electrode 1 respectively, the drain electrode of the resistor D1 respectively, the drain electrode 1 is connected with the drain electrode of the drain electrode 1, the drain electrode of the resistor D1 respectively, the drain electrode and the drain electrode of the drain electrode 1 respectively drain electrode 1 and the drain electrode of the drain electrode 1 respectively 1. The source of the power switch tube M1 is respectively connected with a pin CS on the constant current chip U1 and one end of a resistor R3, the other end of the resistor R3 is grounded, a pin COMP on the constant current chip U1 is grounded through a capacitor C3, a pin GND on the constant current chip U1 is grounded, a pin DIM on the constant current chip U1 is connected with a first end of a signal generating chip U2, the signal generating chip U2 is respectively connected with one end of a capacitor C6 and a pin LDO on the constant current chip U1, the other end of the capacitor C6 is respectively connected with a third end of the signal generating chip U2, one end of an auxiliary winding AUX, one end of the resistor R2 and one end of a capacitor C5 are grounded, the other end of the auxiliary winding is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the other end of the resistor R2, the other end of the capacitor C5 and the pin FB on the constant current chip U1, the constant current chip U1 receives the pulse width modulation signal, and the pulse width modulation signal is generated by the constant current chip U2, and the pulse width modulation device can constantly output the pulse width modulation signal is in a constant proportion to the pulse width modulation device of the LED lamp to the LED signal with the constant duty ratio of 100.
Further, the constant current chip U1 comprises a GM module, a CMP1 module, a CMP2 module, an S & H module, a VREF module, an LDO1 module, a PWM-LOGIC module, a VDD-DETECT module, a DRIVER module, a FB-DET module and a REGULATOR & UVLO module, wherein the pin LDO is respectively connected with the pin DRV, the pin HV and the LDO1 module, the pin DRV is respectively connected with the pin COMP and the third end of the DRIVER module, the second end of the DRIVER module is respectively connected with the LDO1 module, the VDD-DETECT module, the REGULATOR & LO module and the pin FB, the pin HV is respectively connected with the pin VDD and the VDD-DETECT module, the pin FB is respectively connected with the first end of the PWM-GIC module through the FB-DET module, the second end of the PWM-LOGIC module is connected with the first end of the CMP1 module, the third end of the PWM-LOGIC module is connected with the third end of the CMP1 module, the fourth end of the PWM-LOGIC module is connected with the third end of the CMP2 module, the fifth end of the PWM-LOGIC module is connected with the first end of the DRIVER module, the second end of the CMP1 module is respectively connected with the third end of the GM module and the pin COMP, the first end of the GM module is grounded through the VREF module, the VREF module is connected with the pin DIM, the pin DIM is respectively connected with the pin FB and the pin CS, the pin CS is respectively connected with one end of the S & H module, the second end of the GM module, the first end of the CMP2 module and the pin GND, the pin GND is connected with the pin COMP, and the second end of the S & H module is connected with the second end of the GM module.
Further, the input end L and the input end N input alternating current with the frequency of 50-60Hz and the voltage of 85-265V.
Further, the allowable voltage range of the constant current chip U1 is 12V-25V.
Further, a linear voltage stabilizing circuit is arranged on the constant current chip U1, and the linear voltage stabilizing circuit provides 3.3V voltage for the signal generating chip U2.
Further, the capacitor C4 is an electrolytic capacitor.
The English used in the invention is described as follows:
PF (: a power factor.
CMP: and a comparator.
DRAIN: and a drain electrode of the MOS tube.
DRVER: and a driving module.
PWM-LOGIC: and the pulse width modulation logic control module.
Relator & UVLO: a power supply voltage regulator and an under-voltage protection circuit.
FB-DET: and a feedback detection module.
And (B): and a feedback port.
SAW: and the sawtooth wave generating module.
GM: transconductance operational amplifier.
CS: a current detection port.
COMP: compensating for the port.
The beneficial effects of the invention are as follows: the basic function of the high-integration high-PF intelligent dimming circuit structure provided by the invention is that under the condition that the amplitude of input alternating current, the voltage at two ends of an output LED, the ambient temperature and the characteristics of various components are degraded within a certain range, a system can still ensure constant current supply set by the system, and the LED lamp group is driven to emit light, and the function is completed by the constant current chip U1. The intelligent dimming function is characterized in that the intelligent dimming function is achieved by receiving a pulse width modulation signal PWM generated by U2 through a U1 chip, the output current can be linearly regulated according to the duty ratio of the PWM signal, the PWM signal is achieved by receiving a control signal of Bluetooth equipment such as a mobile phone and the like through the U2 and converting the control signal into a pulse signal with constant height, constant low or 0-100% duty ratio, the constant height corresponds to the maximum brightness, the constant low is closed, and the brightness of the corresponding LED lamp is in direct proportion to the duty ratio of the pulse signal when the pulse exists, so that the intelligent dimming purpose is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high integration high PF intelligent dimmer circuit architecture according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a chip U1 of a high-integration high-PF intelligent dimming circuit structure according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
According to the embodiment of the invention, a high-integration high-PF intelligent dimming circuit structure is provided.
As shown in fig. 1-2, the high-integration high-PF intelligent dimming circuit structure according to an embodiment of the present invention includes an input terminal L, an input terminal N, a rectifier bridge BRG, a constant current chip U1, a signal generating chip U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, an inductor L1, a diode D2, a diode D3, a power switch tube M1, a power switch tube M2, an auxiliary winding AUX, an output terminal positive electrode and an output terminal negative electrode, wherein the input terminal L is respectively connected with a first end of the rectifier bridge BRG and a positive electrode of the diode D2, the input terminal N is respectively connected with a third end of the rectifier bridge BRG and a positive electrode of the diode D3, a second end of the rectifier bridge BRG is grounded, the fourth end of the rectifier bridge BRG is respectively connected with the cathode of the diode D1, one end of the resistor R4, one end of the capacitor C4 and the anode of the output end, the cathode of the diode D2 is respectively connected with the cathode of the diode D3, one end of the resistor R5 and the drain of the power switch tube M2, the grid of the power switch tube M2 is respectively connected with the other end of the resistor R5 and the pin HV on the constant current chip U1, the source of the power switch tube M2 is respectively connected with the capacitor C1 and the pin VDD on the constant current chip U1, the pin DRV on the constant current chip U1 is connected with the grid of the power switch tube M1, the drain of the power switch tube M1 is respectively connected with the anode of the diode D1 and one end of the inductor L1, the other end of the inductor L1 is respectively connected with the other end of the resistor R4, the other end of the capacitor C4 and the anode of the output end, an LED lamp set is arranged between the positive electrode of the output end and the negative electrode of the output end, the source electrode of the power switch tube M1 is respectively connected with a pin CS on the constant current chip U1 and one end of a resistor R3, the other end of the resistor R3 is grounded, a pin COMP on the constant current chip U1 is grounded through a capacitor C3, a pin GND on the constant current chip U1 is grounded, a pin DIM on the constant current chip U1 is connected with the first end of the signal generating chip U2, the signal generating chip U2 is respectively connected with one end of a capacitor C6 and a pin LDO on the constant current chip U1, the other end of the capacitor C6 is respectively connected with a third end of the signal generating chip U2, one end of an auxiliary winding AUX, one end of the resistor R2 and one end of a capacitor C5 and is grounded, the other end of the auxiliary winding AUX is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the other end of the resistor R2, the other end of the capacitor C5 and a pin FB on the constant current chip U1, the constant current chip U1 receives a pulse width modulation signal PWM generated by the signal generating chip U2, the duty ratio of the pulse width modulation signal PWM can linearly regulate the output current, the signal generating chip U2 receives a control signal of a mobile phone Bluetooth device and converts the control signal into a pulse width modulation signal PWM with constant height, constant low or 0-100% duty ratio, the constant height corresponds to the maximum brightness, the constant low is closed, and the brightness of the corresponding LED lamp is in direct proportion to the duty ratio of the pulse signal.
In one embodiment, the constant current chip U1 comprises a GM module, a CMP1 module, a CMP2 module, an S & H module, a VREF module, an LDO1 module, a PWM-LOGIC module, a VDD-DETECT module, a DRIVER module, a FB-DET module and a REGULATOR & UVLO module, wherein the pin LDO is respectively connected with the pin DRV, the pin HV and the LDO1 module, the pin DRV is respectively connected with the pin COMP and the third end of the DRIVER module, the second end of the DRIVER module is respectively connected with the LDO1 module, the VDD-DETECT module, the REGULATOR module and the pin VDD, the pin HV is respectively connected with the pin VDD and the VDD-DETECT module, the pin FB is respectively connected with the first end of the PWM-GIC module through the FB-DET module, the second end of the PWM-LOGIC module is connected with the first end of the CMP1 module, the third end of the PWM-LOGIC module is connected with the third end of the CMP1 module, the fourth end of the PWM-LOGIC module is connected with the third end of the CMP2 module, the fifth end of the PWM-LOGIC module is connected with the first end of the DRIVER module, the second end of the CMP1 module is respectively connected with the third end of the GM module and the pin COMP, the first end of the GM module is grounded through the VREF module, the VREF module is connected with the pin DIM, the pin DIM is respectively connected with the pin FB and the pin CS, the pin CS is respectively connected with one end of the S & H module, the second end of the GM module, the first end of the CMP2 module and the pin GND, the pin GND is connected with the pin COMP, and the second end of the S & H module is connected with the second end of the GM module.
In one embodiment, the input end L and the input end N input alternating current with the frequency of 50-60Hz and the voltage of 85-265V.
In one embodiment, the voltage allowable range of the constant current chip U1 is 12V-25V.
In one embodiment, the constant current chip U1 is provided with a linear voltage stabilizing circuit, and the linear voltage stabilizing circuit provides 3.3V voltage for the signal generating chip U2.
In one embodiment, the capacitor C4 is an electrolytic capacitor.
When the intelligent LED is used for driving, a control signal is needed to be obtained from Bluetooth equipment such as a mobile phone and the like, and the control signal is used for adjusting the output current, so that the aim of adjusting the brightness of the LED is fulfilled, in the process, when the equipment is controlled to be turned off, the system needs to enter a standby mode to wait for the next starting or dimming signal, namely the VDD and LDO of U1 need to keep working voltage, the function is generally to be reduced to a range of 10V to 20V through a standby switching power supply circuit, and then the LDO chip is used for converting the low ripple voltage to 5V or 3.3V to be sent to a wireless chip. In the circuit architecture, a standby power supply chip and peripheral components of the standby power supply are omitted, LDO is integrated into a main control chip, so that a peripheral circuit of a system is simpler and easier to design, under the framework of the system, tasks of the standby power supply are completed by D2, D3, M2, R5 and C1, the chip U1 is detected through a VDD pin, and the amplitude of the VDD is controlled through the HV pin, so that the VDD is stabilized at a preset voltage value.
In summary, by means of the above technical scheme of the present invention, the basic function of the high-integration high-PF intelligent dimming circuit structure provided by the present invention is that the system can still ensure the constant current supply set by the system to drive the LED lamp set to emit light under the condition that the amplitude of the input alternating current, the voltage at both ends of the output LED, the ambient temperature and the characteristics of each component are degraded within a certain range, and the function is completed by the constant current chip U1. The intelligent dimming function is characterized in that the intelligent dimming function is achieved by receiving a pulse width modulation signal PWM generated by U2 through a U1 chip, the output current can be linearly regulated according to the duty ratio of the PWM signal, the PWM signal is achieved by receiving a control signal of Bluetooth equipment such as a mobile phone and the like through the U2 and converting the control signal into a pulse signal with constant height, constant low or 0-100% duty ratio, the constant height corresponds to the maximum brightness, the constant low is closed, and the brightness of the corresponding LED lamp is in direct proportion to the duty ratio of the pulse signal when the pulse exists, so that the intelligent dimming purpose is achieved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The utility model provides a high integrated level high PF intelligent light modulation circuit structure, which is characterized in that, including input L, input N, rectifier bridge BRG, constant current chip U1, signal generation chip U2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, inductance L1, diode D2, diode D3, power switch tube M1, power switch tube M2, auxiliary winding AUX, output positive pole and output negative pole, wherein, input L respectively with rectifier bridge BRG's first end and the positive pole of diode D2, input N respectively with rectifier bridge BRG's third end and the positive pole of diode D3 are connected, rectifier bridge BRG's second termination ground, rectifier bridge BRG's fourth end respectively with diode D1's negative pole, resistance R4's one end, one end and the positive pole of capacitor C4 is connected, the cathode of the diode D2 is respectively connected with the cathode of the diode D3, one end of the resistor R5 and the drain electrode of the power switch tube M2, the grid electrode of the power switch tube M2 is respectively connected with the other end of the resistor R5 and the pin HV on the constant current chip U1, the source electrode of the power switch tube M2 is respectively connected with the capacitor C1 and the pin VDD on the constant current chip U1, the pin DRV on the constant current chip U1 is connected with the grid electrode of the power switch tube M1, the drain electrode of the power switch tube M1 is respectively connected with the anode of the diode D1 and one end of the inductor L1, the other end of the inductor L1 is respectively connected with the other end of the resistor R4, the other end of the capacitor C4 and the cathode of the output end, an LED lamp group is arranged between the anode of the output end and the cathode of the output end, the source of the power switch tube M1 is respectively connected with a pin CS on the constant current chip U1 and one end of a resistor R3, the other end of the resistor R3 is grounded, a pin COMP on the constant current chip U1 is grounded through a capacitor C3, a pin GND on the constant current chip U1 is grounded, a pin DIM on the constant current chip U1 is connected with a first end of a signal generating chip U2, the signal generating chip U2 is respectively connected with one end of a capacitor C6 and a pin LDO on the constant current chip U1, the other end of the capacitor C6 is respectively connected with a third end of the signal generating chip U2, one end of an auxiliary winding AUX, one end of the resistor R2 and one end of a capacitor C5 are grounded, the other end of the auxiliary winding is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the other end of the resistor R2, the other end of the capacitor C5 and the pin FB on the constant current chip U1, the constant current chip U1 receives the pulse width modulation signal, and the pulse width modulation signal is generated by the constant current chip U2, and the pulse width modulation device can constantly output the pulse width modulation signal is in a constant proportion to the pulse width modulation device of the LED lamp to the LED signal with the constant duty ratio of 100.
2. The high-integration high-PF intelligent dimming circuit structure according to claim 1, wherein the constant current chip U1 comprises a GM module, a CMP1 module, a CMP2 module, an S & H module, a VREF module, an LDO1 module, a PWM-LOGIC module, a VDD-DETECT module, a DRIVER module, a FB-DET module, and a REGULATOR & UVLO module, wherein the pin LDO is connected with the pin DRV, the pin HV, and the LDO1 module, the pin DRV is connected with the third terminals of the pin COMP and the DRIVER module, the second terminal of the DRIVER module is connected with the LDO1 module, the VDD-DETECT module, the REGULATOR & LO module, and the pin VDD, the pin HV is connected with the pin VDD-DETECT module, the pin FB is connected with the pin FB through the FB-DET module, the pin FB is connected with the first terminal of the PWM-LOC module, the second end of the PWM-LOGIC module is connected with the first end of the CMP1 module, the third end of the PWM-LOGIC module is connected with the third end of the CMP1 module, the fourth end of the PWM-LOGIC module is connected with the third end of the CMP2 module, the fifth end of the PWM-LOGIC module is connected with the first end of the DRIVER module, the second end of the CMP1 module is respectively connected with the third end of the GM module and the pin COMP, the first end of the GM module is grounded through the VREF module, the VREF module is connected with the pin DIM, the pin DIM is respectively connected with the pin FB and the pin CS, the pin CS is respectively connected with one end of the S & H module, the second end of the GM module, the first end of the CMP2 module and the pin GND, the pin GND is connected with the pin COMP, and the second end of the S & H module is connected with the second end of the GM module.
3. The intelligent dimming circuit structure with high integration and high PF according to claim 1, wherein the input end L and the input end N input alternating current with frequency of 50-60Hz and voltage of 85-265V.
4. The high-integration high-PF intelligent dimming circuit structure according to claim 1, wherein the voltage allowable range of the constant current chip U1 is 12V-25V.
5. The high-integration high-PF intelligent dimming circuit structure according to claim 1, wherein a linear voltage stabilizing circuit is arranged on the constant current chip U1, and the linear voltage stabilizing circuit provides 3.3V voltage for the signal generating chip U2.
6. The high-integration high-PF intelligent dimming circuit structure according to claim 1, wherein the capacitor C4 is an electrolytic capacitor.
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| CN201810094823.3A CN110099476B (en) | 2018-01-31 | 2018-01-31 | High-integration-level high-PF intelligent dimming circuit structure |
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| CN201810094823.3A CN110099476B (en) | 2018-01-31 | 2018-01-31 | High-integration-level high-PF intelligent dimming circuit structure |
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| CN110099476B true CN110099476B (en) | 2024-03-15 |
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| CN101420802A (en) * | 2008-12-02 | 2009-04-29 | 深圳市亮百佳电子科技有限公司 | The LED constant-current source that is used for the AC controllable silicon light modulation mode of illuminator |
| CN104661408A (en) * | 2015-02-10 | 2015-05-27 | 深圳市佳比泰电子科技有限公司 | LED dimming circuit and LED lamp |
| CN105323512A (en) * | 2015-11-23 | 2016-02-10 | 深圳创维－Rgb电子有限公司 | A PFC power supply secondary control device |
| CN208210363U (en) * | 2018-01-31 | 2018-12-07 | 长沙泰科阳微电子有限公司 | A kind of high PF Intelligent dimming circuit structure of high integration |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420802A (en) * | 2008-12-02 | 2009-04-29 | 深圳市亮百佳电子科技有限公司 | The LED constant-current source that is used for the AC controllable silicon light modulation mode of illuminator |
| CN104661408A (en) * | 2015-02-10 | 2015-05-27 | 深圳市佳比泰电子科技有限公司 | LED dimming circuit and LED lamp |
| CN105323512A (en) * | 2015-11-23 | 2016-02-10 | 深圳创维－Rgb电子有限公司 | A PFC power supply secondary control device |
| CN208210363U (en) * | 2018-01-31 | 2018-12-07 | 长沙泰科阳微电子有限公司 | A kind of high PF Intelligent dimming circuit structure of high integration |
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