WO2013078669A1 - Circuit pilote de diode électroluminescente et puce pilote de diode électroluminescente - Google Patents

Circuit pilote de diode électroluminescente et puce pilote de diode électroluminescente Download PDF

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Publication number
WO2013078669A1
WO2013078669A1 PCT/CN2011/083344 CN2011083344W WO2013078669A1 WO 2013078669 A1 WO2013078669 A1 WO 2013078669A1 CN 2011083344 W CN2011083344 W CN 2011083344W WO 2013078669 A1 WO2013078669 A1 WO 2013078669A1
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WIPO (PCT)
Prior art keywords
led
circuit
control module
inductor
pin
Prior art date
Application number
PCT/CN2011/083344
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English (en)
Chinese (zh)
Inventor
叶军
高铭坤
王莉
Original Assignee
Ye Jun
Gao Mingkun
Wang Li
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ye Jun, Gao Mingkun, Wang Li filed Critical Ye Jun
Priority to PCT/CN2011/083344 priority Critical patent/WO2013078669A1/fr
Priority to CN201180036396.XA priority patent/CN103250467B/zh
Publication of WO2013078669A1 publication Critical patent/WO2013078669A1/fr

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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
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology

Definitions

  • the present invention relates to the field of LED technology, and more particularly to an LED driving circuit and an LED driving chip.
  • LED light sources are the hope of the 21st century light source market and will gradually replace traditional light sources in the future. OCO pointed out high-brightness LED It will be one of the greatest inventions after humans invented incandescent lamps. At a time when global energy is scarce, energy conservation is a major problem we face. LED lights as a new type of Energy-saving and environmentally friendly green light source products are bound to be widely used.
  • Fluorescent lamps are currently the most widely used lamps, but most of the phosphors used in fluorescent lamps contain substances that are harmful to the environment, such as tributes. This technology will gradually be Replaced by LED lighting.
  • the LED is installed due to the ballast on the fluorescent lamp holder.
  • lamp modification such as short circuit of the ballast, removal of the starter, and the like.
  • the purpose of this modification is to apply AC power directly to both ends of the LED.
  • the above operation is very inconvenient, the replacement cost is high, and the limitation is greatly limited.
  • the popularity of LED lights is very inconvenient, the replacement cost is high, and the limitation is greatly limited. The popularity of LED lights.
  • U.S. Patent 7,079,922 discloses an LED driver circuit compatible with a ballast. In this solution, simply put the LED The drive circuit is connected to the ballast. There is no control mechanism in the circuit to control the current of the output LED, nor can it be used for the LED. The lamp is protected. Since the operating characteristics of the ballast depend on the impedance of the load, the frequency and amplitude of the output voltage will vary as the load impedance changes. LED of the program The drive circuit will cause different output of the ballast under different working conditions, especially when the LED lamp shows high resistance before the LED lamp is turned on, the ballast will generally output 500V. The above high voltage (equivalent to the ignition process of the fluorescent lamp) makes it easy to damage the LED lamp. In addition, there are many types of ballasts in the market, and the quality is uneven. The drive circuit is connected to different types of ballast circuits and will not guarantee the consistency of the power supply of the output LEDs.
  • the existing LED driver circuit compatible with the ballast cannot be connected to the ballast circuit and cannot output the LED.
  • the current of the lamp is controlled, and the LED lamp cannot be protected.
  • different output of the ballast will be caused, and the LED is easy to be Damage caused by the lamp; and the access to different types of ballast circuits does not guarantee the uniformity of the power supply of the output LEDs.
  • the present invention is directed to the above-mentioned drawbacks of the prior art, and provides an LED driving circuit capable of being compatible with various types of ballasts and capable of ensuring uniform power supply of the output LED lamp and capable of operating in an AC to DC, DC to DC operating state. And LED driver chip.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to provide an LED driving chip, comprising:
  • a negative impedance control module that receives the operating mode control signal and the power supply of the ballast circuit output power terminal to control the internal equivalent impedance variation of the chip
  • the driving chip further includes first to eighth pins; wherein the pattern recognition and control module and the negative impedance control module respectively connect the ballast circuit output power terminal through the first pin; the pattern recognition and control The module is connected to the first load unit of the peripheral driving circuit through the second pin; the drain of the power tube is connected to the main-stage inductor of the peripheral driving circuit through the third pin, and the source thereof passes through the first a four-pin detecting current of an auxiliary inductor of the peripheral driving circuit; the pattern recognition and control module and the constant current /
  • the constant voltage driving control module is connected to the output voltage of the power supply terminal of the stepped ballast circuit through the fifth pin, and is connected to the auxiliary inductor of the peripheral driving circuit through the sixth pin, and passes through the seventh tube.
  • the pin is connected to the voltage of the auxiliary inductor of the peripheral driving circuit after the step-down, and is grounded through the eighth pin.
  • the LED driving chip of the present invention further comprises monitoring the power supply of the ballast circuit output power terminal to achieve the constant current / Protection module for overvoltage and overcurrent protection of constant voltage drive control module.
  • the LED driving circuit comprising a protection circuit and an LED power supply circuit connected to an output power terminal of the ballast circuit
  • the LED power supply circuit includes a main-stage inductor connected to the protection circuit, a secondary inductor that forms a mutual inductance with the main-stage inductor and supplies power to the LED lamp, and an auxiliary inductor that forms a mutual inductance with the secondary inductor;
  • the driving circuit further includes: an LED driving chip, a first load unit controlled by the LED driving chip, and an auxiliary resistor; wherein the first load unit is connected between the output power terminal of the ballast circuit and the ground;
  • the driver chip includes:
  • a power tube having a drain connected to the main inductor and a source grounded via the auxiliary resistor;
  • the LED driving circuit of the present invention further includes:
  • a first resistor and a second resistor connected in parallel to each other across the auxiliary inductor.
  • the LED driving circuit of the present invention comprising:
  • a third inductor, a fifth resistor, and a second diode connected in parallel across the main inductor, wherein the third inductor and the fifth resistor are connected in parallel, and the third inductor and the fifth resistor are connected in parallel with the whole
  • the second diode is connected in series.
  • LED of the invention a driving chip, comprising first to eighth pins; wherein the pattern recognition and control module and the negative impedance control module are respectively connected to the output power terminal of the ballast circuit through the first pin; the pattern recognition and control The module is connected to the first load unit through the second pin; the drain of the power tube is connected to the main inductor through the third pin, and the source thereof is detected by the fourth pin
  • the auxiliary inductor current; the pattern recognition and control module and the constant current / a constant voltage driving control module is connected to the node of the third resistor and the fourth resistor through the fifth pin, connected to the auxiliary inductor through the sixth pin, and connected through the seventh pin through the sixth pin And a node connected to the first resistor and the second resistor, and grounded through the eighth pin.
  • the driving circuit further includes a third diode and a fourth capacitor, wherein the third diode is connected to the auxiliary inductor, the cathode is grounded via the fourth capacitor, and the auxiliary resistor is connected to the fourth Between the pin and the ground.
  • the driving chip further includes: connecting, by the first pin, the power supply end of the ballast circuit, and monitoring the power supply of the power output end of the ballast circuit to implement overvoltage and overcurrent of the constant current/constant voltage driving control module.
  • Protected protection module is
  • the driving chip has the following beneficial effects: the pattern recognition and control module recognizes the power type of the output terminal of the ballast circuit and makes the ballast work normally, so that the LED of the invention
  • the driver chip can operate under DC or AC input and is compatible with various ballasts; and the pattern recognition and control module controls the negative impedance control module to make the LED
  • An effective negative feedback loop is formed between the driver chip and the ballast circuit to ensure the stability of the output voltage of the ballast circuit.
  • the constant current/constant voltage drive control module achieves constant by controlling the switching frequency and duty cycle of the power tube. Current / The voltage output enables the LED driver chip of the present invention to protect the LED lamp by outputting the power of the load LED lamp after accessing different types of ballast circuits.
  • the protection module of the LED driving chip of the invention realizes input overvoltage and overcurrent protection for the LED driving chip, and ensures LED The driver chip operates in a safe voltage and current range.
  • the LED driving circuit of the invention has the following beneficial effects: LED therein
  • the chip can identify the power type of the output terminal of the ballast circuit and operate under the corresponding working state, so that the LED driving chip of the invention can work under DC or AC input;
  • the chip controls the first load unit, so that the LED drive circuit allows different types of ballasts to work normally after accessing different types of ballast circuits, and ensures the stability of the output voltage of the ballast circuit, so that the LED Drive circuit output load
  • the LED lamp has the same power supply and protects the LED lamp.
  • FIG. 1 is a structural view of a first embodiment of an LED driving chip of the present invention
  • FIG. 2 is a structural view showing a second embodiment of the LED driving chip of the present invention.
  • FIG. 3 is a structural view showing a third embodiment of the LED driving chip of the present invention.
  • FIG. 4 is a circuit diagram of a fifth embodiment of the LED driving circuit of the present invention.
  • FIG. 5 is a flow chart showing the operation of the preferred embodiment of the LED driving circuit of the present invention after accessing the ballast circuit;
  • FIG. 6 is a circuit diagram of a driving circuit in the case where the LED driving chip of the present invention is applied to a ballastless device and the input is an alternating current;
  • FIG. 7 is a circuit diagram of a driving circuit of the LED driving chip of the present invention applied to a DC input.
  • the invention discloses an LED driving chip compatible with various ballasts and an LED applying the LED driving chip
  • the driving circuit, and the LED driving chip and the LED driving circuit of the present invention can operate with the input being direct current or alternating current.
  • the LED driving chip includes:
  • a pattern recognition and control module that identifies the power type of the output power of the ballast circuit to generate a corresponding operating mode control signal and outputs the ballast to operate normally 201 ;
  • a power tube 203 whose drain is connected to the main inductor of the peripheral driving circuit, and whose source is grounded via the resistor of the peripheral driving circuit;
  • the gate connection controls the switching frequency and duty cycle of the power transistor 203 to detect the constant current of the constant current/voltage output by detecting the power supply voltage of the output terminal of the ballast circuit after the step-down and the main-stage inductor voltage of the peripheral driving circuit. / Constant voltage drive control module 204.
  • ballasts ballast circuits
  • an inductive ballast passes through a starter, and a passive electronic ballast passes through a self-excited oscillation.
  • Active electronic ballasts (controlled by the chip) control the oscillation frequency and so on.
  • the type of ballast is not limited, but is automatically compatible with the output of different ballasts.
  • the output of the inductive ballast (inductive ballast circuit) is low-frequency alternating current, the output of the electronic ballast (electronic ballast circuit), high-frequency alternating current, due to high frequency, the capacitor-filtered electronic ballast ( The electronic ballast circuit) output is close to DC.
  • the LED chip can accommodate a variety of ballasts (ballast circuits), which requires the LED driver chip to operate both under AC and DC.
  • the pattern recognition and control module 201 A power type of the ballast circuit output power terminal is identified to generate a corresponding operating mode control signal, and the generated operating mode control signal is output to the negative impedance control module 202.
  • Negative impedance control module 202 The negative impedance control module 202 is controlled according to the received operating mode control signal and the power supply of the ballast circuit output power terminal to control the internal equivalent impedance change of the LED driving chip.
  • the output voltage of the ballast circuit increases. Controlling the internal equivalent impedance of the LED driver chip to reduce the further rise of the output voltage of the ballast circuit, thereby reducing the voltage and making the LED
  • An effective negative feedback loop is formed between the driver chip and the ballast to ensure the stability of the output voltage of the ballast circuit.
  • Constant current / constant voltage drive control module 204 and power tube 203 The gate connection controls the switching frequency and duty cycle of the power transistor 203 to achieve a constant current by detecting the power supply voltage at the power supply terminal of the step-down ballast circuit and the main-stage inductor voltage of the peripheral driving circuit. Voltage output.
  • the LED driving chip of the present invention can adapt to different ballast circuit outputs, and the output of different ballast circuits is used as an LED.
  • the input power of the driver chip is driven, and the LED driver chip can work normally if the output of the ballast circuit is DC (after capacitive filtering) or low frequency AC.
  • FIG. 2 is a structural view of a second embodiment of an LED driving chip of the present invention, as shown in FIG. 2, in this embodiment, an LED
  • the driver chip further includes first to eighth pins; wherein the pattern recognition and control module 201 and the negative impedance control module 202 pass through the first pin 205, respectively.
  • the pattern recognition and control module 201 is connected to the first load unit of the peripheral driving circuit through the second pin 206; the drain of the power tube 203 passes through the third pin 207 Connected to the main inductor of the peripheral driving circuit, the source detects the current of the auxiliary inductor of the peripheral driving circuit through the fourth pin 208; the pattern recognition and control module 201 and the constant current/constant voltage driving control module 204
  • the fifth pin 209 is connected to the output voltage of the output terminal of the stepped ballast circuit, and is connected to the auxiliary inductor of the peripheral driving circuit through the sixth pin 210, and passes through the seventh pin 211.
  • the voltage of the auxiliary inductor of the peripheral driving circuit after the step-down is applied, and is grounded through the eighth pin 212.
  • the remaining cases and the LED of the present invention The first embodiment of the driving chip is the same and will not be described herein.
  • the LED driver chip of the present invention can also include other pins for the connection of the chip to an external drive circuit.
  • the pattern recognition and control module 201 simulates the voltage of the fluorescent lamp by controlling the first load unit / The current curve allows the ballast to work properly.
  • the person skilled in the art will be able to understand the voltage of the fluorescent lamp required for the normal starting and working of the ballast / The current characteristics, therefore, the person skilled in the art can, according to the technical solution disclosed by the present invention, combine the voltage/current characteristics of the fluorescent lamp required for the normal starting and working of the ballast to make the ballast work normally.
  • FIG. 3 is a structural view of a third embodiment of the LED driving chip of the present invention, as shown in FIG. 3, in the embodiment, the LED The driving chip further includes a protection module 213 for monitoring the power supply of the ballast circuit output power terminal to implement overvoltage and overcurrent protection for the constant current/constant voltage driving control module 204, and a protection module 213.
  • the ballast circuit output power terminal is connected through the first pin 205. In this embodiment, the rest of the situation is the same as that of the second embodiment, and details are not described herein again.
  • the protection module 213 The output power of the ballast circuit can also be obtained by other pins or other modules.
  • the protection module 213 monitors the power supply of the output power of the ballast circuit and sends a protection signal to the constant current /
  • the constant voltage drive control module 204 ensures that the LED driver chip operates within a safe current/voltage range.
  • the driver chip can also operate without a ballast (ballast circuit) and the power input to it is AC or DC. These two cases will be described in conjunction with a driver circuit external to the chip.
  • the LED The driving circuit includes a protection circuit 100 and an LED power supply circuit 300 connected to the output power terminal of the ballast circuit; wherein the LED power supply circuit 300 includes and the protection circuit 100
  • the LED driver chip 200 includes:
  • a power tube 203 whose drain is connected to the main inductor 301 and whose source is grounded via the auxiliary resistor 700;
  • the constant current/constant voltage drive control module 204 that controls the switching frequency and duty cycle of the power transistor 203 to achieve a constant current/voltage output.
  • the ballast circuit output power terminal refers to an output terminal after passing through the rectifier bridge.
  • the LED driver chip 200 The LED driving chip described in the first embodiment of the LED driving chip of the present invention.
  • LED driving circuit of the invention LED chip 200 thereof Able to identify the type of power supply at the output terminal of the ballast circuit and operate in a corresponding operating state, thereby enabling the LED driver chip to operate under DC or AC input, thereby enabling the LED of the present invention
  • the driving circuit can operate under DC or AC input; the LED chip 200 controls the first load unit 400 to make the LED
  • the LED power supply circuit 300 Also includes:
  • the positive electrode is connected to the secondary inductor 302, and the negative electrode is connected to the first diode 304 of the first capacitor 30;
  • a first resistor 306 and a second resistor 307 are connected in parallel to each other across the auxiliary inductor 305.
  • the protection circuit 100 includes:
  • a second capacitor 103 connected between the output power terminal of the ballast circuit and the ground;
  • a third inductor 104, a fifth resistor 105, and a second diode 106 connected in parallel across the main inductor 301, wherein the third inductor 104 is connected in parallel with the fifth resistor 105, and the third inductor 104 and the fifth resistor 105 are connected in series with the second diode 106 in parallel.
  • the circuit formed by the third capacitor 104, the fifth resistor 105 and the second diode 106 functions to protect the LED
  • the power tube 203 in the driving chip 200 is driven.
  • the LED driving chip 200 further includes first to eighth pins; wherein the pattern recognition and control module 201 and the negative impedance control module 202 pass through the first pin 205, respectively Connected to the output power terminal of the ballast circuit; the pattern recognition and control module 201 is connected to the first load unit 400 through the second pin 206; the drain of the power tube 203 passes through the third pin 207 Connected to the main inductor 301, the source detects the auxiliary inductor 305 current through the fourth pin 208; the pattern recognition and control module 201 and the constant current / constant voltage drive control module 204
  • the fifth resistor 209 is connected to the node of the third resistor 101 and the fourth resistor 102, the sixth pin 210 is connected to the auxiliary inductor 305, and the seventh pin 211 is connected to the first resistor.
  • the node of 306 and the second resistor 307 is grounded through the eighth pin 212.
  • FIG. 4 is a circuit diagram of a fifth embodiment of the LED driving circuit of the present invention, as shown in FIG. 4, in the embodiment, the LED The driving circuit further includes a third diode 500 and a fourth capacitor 600, wherein the third diode 500 is connected to the auxiliary inductor 305, the cathode is grounded via the fourth capacitor 600, and the auxiliary resistor is 700. Connected between the fourth pin 208 and ground. In this embodiment, the rest of the situation is the same as the fourth embodiment of the LED driving circuit of the present invention, and details are not described herein again.
  • the sixth pin 210 is the power input terminal of the LED driving chip 200
  • the third diode 500 is provided.
  • the fourth capacitor 600 is used for voltage regulation.
  • the LED driver chip 200 The method further includes connecting, by the first pin 205, the ballast circuit output power terminal, and monitoring the power supply of the ballast circuit output power terminal to implement the constant current/constant voltage drive control module 204. Protection module for overvoltage and overcurrent protection 213.
  • FIG. 5 is a flow chart showing the operation of the preferred embodiment of the LED driving circuit of the present invention after accessing the ballast circuit.
  • the process begins with a step S501, step S502: the ballast is started and enters the warm-up mode, step S503: the LED driver chip is powered on and starts the protection module, step S504: The pattern recognition and control module controls the first load unit to make the ballast work normally, step S505: the negative impedance control module controls the internal equivalent impedance change of the chip to cause the ballast to output a stable voltage, step S506: constant current / Constant voltage drive control module realizes constant current / voltage output, step S507: The LED power supply circuit outputs a stable power supply to supply the load LED lamp, and the process ends at step S508.
  • the LED driving chip of the present invention can also be used in the case of an AC input without a ballast, and FIG. 6 is an LED of the present invention.
  • the driver circuit is applied to a circuit diagram of a driver circuit without a ballast and the input is an alternating current, as shown in FIG. 6, at this time, the LED of the LED driving chip of the present invention is applied.
  • the first load unit 400 (see FIG. 4) is not required in the driving circuit, and the remaining connections are the same as those in the fifth embodiment of the LED driving circuit of the present invention, and details are not described herein again.
  • the LED driver circuit is powered by an 85V to 265V AC voltage source. See Figure 2,
  • the constant current/constant voltage drive control module 204 of the LED driver chip 200 detects the third resistor 101 and the fourth resistor 102 through the fifth pin 102.
  • the AC power input after the partial pressure is used as an internal reference value.
  • the power transistor 203 of the LED driver chip 200 passes through the third diode 500 from the sixth pin 210.
  • the LED driving chip 200 flows into the power tube 203 and the auxiliary resistor 700, and the constant current/constant voltage driving control module 204 of the LED driving chip 200
  • the voltage value of the fourth pin 208 is monitored.
  • the constant current/constant voltage drive control module 204 will power the tube 203. shut down. At this time, the first diode 304 is turned on, and the secondary inductor 302 supplies power to the first capacitor 303 and the load LED lamp. When the secondary inductor 302 current is released, the LED driver chip The drain of the power transistor 203 of 200 and the auxiliary inductor 305 resonate at the same frequency.
  • the constant current/constant voltage drive control module 204 of the LED driver chip 200 detects the auxiliary inductance 305 When the valley of the resonance wave (the valley of the auxiliary inductor 305 resonance voltage is also the valley of the drain voltage of the power transistor 203), the power transistor 203 is turned on. Wherein, the constant current / constant voltage drive control module 204 The voltage of the auxiliary inductor 305 divided by the first resistor 306 and the second resistor 307 is detected by the seventh pin 211.
  • the LED driving chip of the present invention can also be used for DC input, and FIG. 7 is the LED of the present invention.
  • the driver chip is applied to the circuit diagram of the driver circuit in the case of DC input, as shown in Figure 7.
  • the LED driving circuit includes the LED driving chip in the second or third embodiment of the LED driving chip of the present invention. 200, a first adjusting resistor 702 and a second adjusting resistor 703 connected in series with each other between the output terminals of the DC power source 701, and a positive electrode connected to the third pin 207 of the LED driving chip 200
  • the negative pole is connected to the DC power source 701.
  • the fourth diode 704 of the positive pole is connected to the third pin 207 of the LED driving chip 200 at one end and the fourth inductor 705 of the load LED lamp at the other end.
  • One end is grounded, one end is connected to the third adjusting resistor 706 of the fourth pin 208 of the LED driving chip 200, and one end is grounded, one end is connected to the first adjusting resistor 702 and the second adjusting resistor
  • the fifth capacitor of the 703 node is 707.
  • the sixth pin 210 of the LED driving chip 200 is connected to the node of the first adjusting resistor 702 and the second adjusting resistor 703, and the eighth pin 212 Ground.
  • the load LED is connected to the fourth inductor 705 at one end and to the positive terminal of the DC power supply 701 at the other end.
  • the voltage of the DC power supply 701 is divided by the first adjustment resistor 702 and the second adjustment resistor 703, and then input to the LED driver chip.
  • the sixth pin 210 of 200 inputs the voltage of the LED driver chip 200.
  • LED driver chip 200 constant current / constant voltage drive control module 204 internal clock power tube 203 is turned on and the DC power supply 701 supplies power to the load LED 708.
  • the constant current / constant voltage driving control module 204 puts the power tube 203 closed.
  • the fourth diode 704 is forward conducting, and the fourth inductor 705 supplies power to the load LED, etc. 708.
  • LED drive circuit and LED according to the present invention can be implemented in a specific implementation process
  • the driver chip is appropriately modified to suit the specific requirements of the specific situation. Therefore, it is to be understood that the specific embodiments of the present invention are intended to be illustrative only and not to limit the scope of the invention.

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Abstract

Cette invention concerne une puce pilote de DEL (200), comprenant un module d'identification et de commande de mode, un module de commande d'impédance négative, un tube de puissance et un module de commande d'excitation à courant constant/tension constante. Ladite puce pilote de DEL (200) est compatible avec divers types de ballast pour assurer une puissance constante pour une lampe à DEL chargée. La puce pilote peut en outre fonctionner sans ballast et une entrée en courant alternatif ou constant. L'invention concerne en outre un circuit pilote de DEL qui met en œuvre la puce pilote de DEL et présente donc les mêmes avantages que celle-ci.
PCT/CN2011/083344 2011-12-02 2011-12-02 Circuit pilote de diode électroluminescente et puce pilote de diode électroluminescente WO2013078669A1 (fr)

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PCT/CN2011/083344 WO2013078669A1 (fr) 2011-12-02 2011-12-02 Circuit pilote de diode électroluminescente et puce pilote de diode électroluminescente
CN201180036396.XA CN103250467B (zh) 2011-12-02 2011-12-02 Led驱动电路和led驱动芯片

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Application Number Priority Date Filing Date Title
PCT/CN2011/083344 WO2013078669A1 (fr) 2011-12-02 2011-12-02 Circuit pilote de diode électroluminescente et puce pilote de diode électroluminescente

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CN105682281A (zh) * 2014-12-08 2016-06-15 美格纳半导体有限公司 镇流器类型检测电路以及具有其的发光二极管照明设备
CN105979630A (zh) * 2016-06-08 2016-09-28 杰华特微电子（杭州）有限公司 Led驱动电路
CN107734777A (zh) * 2017-11-09 2018-02-23 深圳市瑞之辰科技有限公司 Led驱动芯片、led驱动电路及led照明装置
CN107834624A (zh) * 2017-10-23 2018-03-23 大同裕隆环保有限责任公司 智能充电架充电信息远程综合管理模组
CN108196184A (zh) * 2018-01-25 2018-06-22 昆明理工大学 一种xl系列升压芯片检测装置及方法
CN108575018A (zh) * 2017-08-24 2018-09-25 常州星宇车灯股份有限公司 一种开关电源单串led短路检测反馈电路
CN110190507A (zh) * 2019-07-05 2019-08-30 苏州全视智能光电有限公司 一种小功率激光器及其驱动电路
CN112492718A (zh) * 2020-12-02 2021-03-12 上海裕芯电子科技有限公司 一种低压过温降流led驱动电路
CN113271697A (zh) * 2021-04-29 2021-08-17 江苏日月照明电器有限公司 一种双端智能型无级调光t8 led灯管

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CN110996457B (zh) * 2019-12-31 2023-05-23 惠州视维新技术有限公司 Led驱动电路、装置、led控制保护方法及存储介质

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