EP2345308A1 - Circuit de fonctionnement destiné à des led - Google Patents

Circuit de fonctionnement destiné à des led

Info

Publication number
EP2345308A1
EP2345308A1 EP09752099A EP09752099A EP2345308A1 EP 2345308 A1 EP2345308 A1 EP 2345308A1 EP 09752099 A EP09752099 A EP 09752099A EP 09752099 A EP09752099 A EP 09752099A EP 2345308 A1 EP2345308 A1 EP 2345308A1
Authority
EP
European Patent Office
Prior art keywords
switch
coil
led
voltage
current
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP09752099A
Other languages
German (de)
English (en)
Other versions
EP2345308B1 (fr
Inventor
Michael Zimmermann
Eduardo Pereira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tridonic AG
Original Assignee
Tridonic AG
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 Tridonic AG filed Critical Tridonic AG
Publication of EP2345308A1 publication Critical patent/EP2345308A1/fr
Application granted granted Critical
Publication of EP2345308B1 publication Critical patent/EP2345308B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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
    • 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]

Definitions

  • the invention relates to an operating circuit with light emitting diodes according to the preamble of patent claim 1 and a method for operating light emitting diodes according to the preamble of patent claim 14.
  • Brightness as well as the light efficiency (light output per watt) of these light sources could be achieved. Not least due to the comparatively long service life, LEDs have become an attractive alternative to conventional light sources such as incandescent or gas discharge lamps.
  • LED light-emitting diode
  • LEDs are therefore always operated in a mode in which the current flow through the LED is controlled.
  • switching regulator such as buck converter (step-down or Bück Converter)
  • buck converter step-down or Bück Converter
  • a control unit controls a high-frequency clocked switch (for example, a
  • the current through the LED arrangement shows a zigzag time course: when the switch is on, the LED current shows a rising edge, with the switch off, there is a falling edge.
  • the time average of the LED current represents the RMS current through the LED arrangement and is a measure of the brightness of the LEDs. By appropriate timing of the circuit breaker, the average, effective current can be controlled.
  • the function of the operating device is now to set a desired average current flow through the LEDs and to minimize the temporal fluctuation of the current due to the high frequency switching on and off of the switch (typically in the range above 10 kHz).
  • a large fluctuation range of the current has a disadvantageous effect particularly with LEDs, since the spectrum of the emitted light can change as the current amplitude changes.
  • the LEDs are supplied by the operating device low-frequency (typically with a frequency in the range of 100-1000 Hz) pulse packets with (on average over time) constant current amplitude.
  • the current within a pulse packet is superimposed on the above-mentioned high-frequency ripple.
  • the brightness of the LEDs can now be controlled by the frequency of the pulse packets; For example, the LEDs can be dimmed by increasing the time interval between the pulse packets.
  • a practical requirement of the operating device is that it can be used as flexibly and versatile as possible, for example, regardless of how many LEDs are actually connected as a load and should be operated.
  • the load may also change during operation if, for example, an LED fails.
  • the LEDs are operated in a so-called 'continuous conduction mode' or non-looping operation. This method is explained in more detail with reference to FIG. 1 a and FIG. 1 b (prior art). 4
  • a buck converter for the operation of at least one LED (or a plurality of LEDs connected in series), which has a first switch S1, is shown as a basic circuit.
  • the operating circuit is supplied with a DC voltage or a rectified AC voltage UO.
  • these times may be selected such that the first switch Sl is turned on when the current falls below a certain minimum reference value and the switch is turned off when the current exceeds a maximum reference value.
  • this method has several disadvantages: First, to achieve the lowest possible ripple, a rapid sequence of switching on and Ausschaltvor réellen is necessary. The slope (positive or negative edge) of the current is namely not controlled by the operating device and considered to be given, since it is determined inter alia by the inductance of the coil Ll and by the power consumption of the LEDs. 5
  • the operating circuit is supplied with a DC voltage or rectified AC voltage for at least one LED.
  • a supply voltage for at least one LED is provided by means of a coil and a clocked by a control / control unit first switch, with the first switch in the coil, an energy is temporarily stored, which is switched off with the first switch via a diode and the at least one LED discharges.
  • the operating circuit has a capacitor disposed in parallel with the at least one LED, and maintains the current through the LED during the demagnetization phase of the coil Ll, so that the current through the LEDs is smoothed.
  • control / regulating unit selects the switch-off time of the first switch so that the lowest possible switching losses occur and still the current flow through the at least one LED has the smallest possible ripple.
  • the operating circuit has a first sensor unit, which generates a first sensor signal dependent on the current flow through the first switch, and / or a second sensor unit, which detects the achievement of demagnetization of the coil and generates a sensor signal.
  • the sensor signals are fed to the control unit and processed. 7
  • control unit uses a signal of the first sensor unit or a signal of the second sensor unit or a combination of both signals to determine the on and / or off timing of the first switch.
  • the control unit turns off the first switch when the current through the first switch exceeds a maximum reference value and turns on again at the time when the coil is demagnetized and / or the diode is off.
  • the first sensor unit is a measuring resistor (shunt).
  • the second sensor unit is an inductively coupled to the coil secondary winding or a Hall sensor.
  • the second sensor unit detects the achievement of the demagnetization of the coil by monitoring the voltage above the first switch by means of a (ohmic) voltage divider.
  • Figure Ia shows a circuit arrangement according to the known prior art 8th
  • Figure Ib shows a diagram with the time course of
  • FIG. 2a shows a first example of an operating circuit (Bück) according to the invention for LEDs
  • FIG. 2b shows a diagram which is time-dependent
  • FIG. 5 shows a modification of the circuit of FIG. 2a
  • FIG. 6 shows a further specific embodiment of the invention
  • FIG. 1a and FIG. 1b show the state of the art.
  • the circuit arrangement shown in FIG. 2a serves for the operation of at least one (or a plurality of LEDs connected in series and / or in parallel).
  • at least one or a plurality of LEDs connected in series and / or in parallel.
  • two LEDs are connected in series, it may of course be only one or more LEDs.
  • the LED or the serially and / or parallel-connected LEDs are also referred to below as the LED track.
  • the circuit is supplied with a DC voltage UO, which of course can also be a rectified AC voltage.
  • the LEDs are connected in series with a coil Ll and a first switch Sl. 9
  • the circuit arrangement has a diode D1 (the diode D1 is connected in parallel with the LEDs and the coil L1) and a capacitor C1 connected in parallel with the LEDs.
  • the diode D1 is connected in parallel with the LEDs and the coil L1
  • a capacitor C1 connected in parallel with the LEDs.
  • the capacitor Cl discharges and contributes to the flow of current through the LED track at. With suitable dimensioning of the capacitor Cl, this leads to a smoothing of the current through the LEDs.
  • a field effect transistor or bipolar transistor is preferably used as a first switch Sl.
  • the first switch Sl is switched to high-frequency, typically in a frequency range of about 10 kHz.
  • An advantage of the invention is that the first switch Sl is spared in operation, as it is preferably switched on, as explained later, when the power applied to it is almost zero.
  • a high-quality component with a very short switching time must be used for the first switch Sl, in order to keep the switching losses within a tolerable range. 10
  • An advantage of the circuit according to the invention is that for the first switch Sl and the diode Dl quite a comparatively cheaper device with a comparatively slightly longer switching time or longer Aus Hurmzeit can be used.
  • circuit of Figure 2a further includes a control and / or regulating unit SR is provided, which sets the timing of the first switch Sl to control the LED power.
  • the control / regulating unit SR uses as input variables signals from a first sensor unit SEI and / or signals from a second sensor unit SE2 to determine the exact switch-on and output time of the first switch Sl.
  • the first sensor unit SEI is arranged in series with the first switch S1 and detects the current flow through the first switch S1. This serves to monitor the current flow through the first switch Sl. If the current flow through the first switch Sl exceeds a certain maximum reference value, the first switch S1 is switched off.
  • the first sensor unit SEI can be, for example, a measuring resistor (shunt or current measuring resistor).
  • the voltage drop at the measuring resistor can now be tapped off and, for example, compared with a reference value by means of a comparator.
  • the first switch S1 is switched off.
  • the second sensor unit SE2 is within the
  • control unit / control unit SR can set a suitable time for the switch-on time of the first switch S1.
  • the first switch S1 is preferably switched on when the current through the coil L1 is zero for the first time or at least very low, that is to say preferably in the time range, when the diode D1 blocks at the end of the freewheeling phase.
  • the lowest possible current is applied to the switch S1 at the switch-on time of the first switch S1.
  • the current through the LEDs shows only slight ripple and does not vary greatly. This is due to the smoothing effect of the parallel to the LED capacitor C1. During the phase of a low coil current, the capacitor Cl takes over the supply of the LED.
  • the enlarged illustration shows the current course within a PWM pulse packet: It is the temporal
  • the opening of the first switch Sl at the time t_l has the consequence that the stored energy in the magnetic field of the coil via the diode Dl and the LEDs or the capacitor Cl discharges.
  • the current i_L continues to flow in the same direction, but decreases continuously and can even reach a negative value.
  • a negative current ie a current flow in the opposite direction is present as long as the charge carriers, which were previously enriched in the conductively polarized diode Dl, are eliminated from the barrier layer of the diode Dl. 13
  • the current i_LED decreases only weakly and is maintained, since the capacitor Cl has a smoothing effect.
  • the diode blocks.
  • the current i_L decreases (but is still negative) and goes to zero.
  • parasitic capacitances at the diode Dl and other parasitic capacitances in the rest of the circuit are reloaded.
  • Coil Ll not or hardly magnetized.
  • the first switch Sl can be turned on at this time with very low losses, since hardly any current flows through the coil Ll. A reconnection is also already possible at the time t_2 or shortly before, because the current through the coil Ll is very low in this time range.
  • a second sensor unit SE2 For detecting the advantageous switch-on time for the first switch Sl, a second sensor unit SE2 is now used.
  • the current i_L can be detected by the coil Ll.
  • the current i_L through the coil Ll can be detected for example by means of a Hall sensor. Additionally or alternatively, therefore, other / other variables can be used which are suitable for detecting an advantageous switch-on time. 14
  • the magnetization state of the coil Ll can be detected.
  • the second sensor unit SE2 may be a secondary winding L2 on the coil L1, which taps the voltage across the coil L1.
  • the monitoring of the temporal voltage curve at the coil Ll (in particular the 'break-in' shortly after the diode Dl has been blocked after the instant t_2) makes it possible to say something about the advantageous reclosing time of the first switch S1.
  • a comparator would suffice, which can detect the achievement of demagnetization (and thus the zero crossing) on the basis of exceeding or falling below a threshold value.
  • the voltage at the node Ux above the first switch Sl can be monitored.
  • the voltage at node Ux drops significantly from a high value to a low value when the diode is turned off.
  • the signal for reconnecting the first switch Sl can therefore be triggered below the voltage Ux below a certain threshold.
  • the control unit SR turns on the first switch Sl again at the time when the coil Ll is demagnetized and / or the diode Dl is turned off.
  • the second sensor unit SE2 can consist of a inductively coupled to the coil Ll secondary winding L2 or a voltage divider (Rl, R2) at the node Ux. 15
  • the control unit SR uses the information from the first sensor unit SEI and / or the second sensor unit SE2 to determine the on and off time of the first switch Sl.
  • the regulation of the (time-averaged) LED power by SR can take place, for example, in the form of PWM signals.
  • the frequency of the PWM signal is typically of the order of 100-1000 Hz.
  • FIG. 3 and Figure 4 show specific embodiments of the invention.
  • FIG. 3 shows a specific embodiment of the above-described switching arrangement (a buck converter). The advantageous one
  • Switch-off is detected by detecting the voltage at the node Ux above the first switch Sl. This is done by the ohmic voltage divider Rl and R2. The node Ux is between the coil Ll, the diode Dl and the switch Sl.
  • a voltage divider for example, a capacitive voltage divider or combined voltage divider, which is composed of resistance and capacity, possible.
  • the measuring resistor (shunt) RS is used for current detection by the first switch Sl.
  • the monitoring of the temporal voltage profile at the node Ux (in particular of the 'break-in' shortly after the diode Dl is blocked in the vicinity of the instant t_2) makes it possible to say something about the advantageous one
  • the voltage at the node Ux above the first switch Sl can be monitored.
  • the voltage at node Ux drops significantly from a high value to a low value when the diode is turned off.
  • the signal for reconnecting the first switch Sl can therefore be triggered below the voltage Ux below a certain threshold.
  • a second switch S2 is additionally arranged in parallel with the LEDs and the capacitor C1.
  • the second switch S2 is selectively / independently controllable and may for example be a transistor (MOSFET or bipolar transistor). If the second switch S2 is closed, the discharge process of the capacitor Cl is accelerated. Due to the accelerated discharge of the capacitor Cl is achieved that the current flow through the LED goes to zero as quickly as possible. This is desirable, for example, at the end of a PWM packet where the current flow through the LED should drop as quickly as possible ie the falling edge of the current profile should be as steep as possible (for reasons of color constancy).
  • the second switch S2 can be activated and driven at a low dimming level, where the PWM packets are very short and it is important that the current through the LED rapidly approaches zero at the end of a pulse packet.
  • a low dimming level can be achieved by suitable activation of the second switch S2. 17
  • this second switch S2 bridges the LEDs when switched on. This is required, for example, when the LEDs are to be turned off, i. should not emit light, but the supply voltage UO is still present. Without bridging by the second switch S2, a (smaller) current would flow across the LEDs and resistors R1 and R2, and the LEDs would (slightly) light up.
  • Switch S2 is parallel to the LEDs and the capacitor Cl for accelerated discharge of the capacitor Cl or for bridging the LED is not limited to the specific Ausfat ⁇ ngsform the circuit arrangement of Figure 3, but can be applied to all embodiments of the invention.
  • FIG. 4 shows a modification of the circuit in FIG. 3 in that the voltage is monitored at the coil L1.
  • the voltage at the coil Sl can be detected, for example, by means of a secondary winding L2, which is coupled to the coil S1 (or an additional coil L2, which inductively couples to the coil L1).
  • a secondary winding L2 is now used.
  • the monitoring of the temporal voltage curve at the coil Ll (in particular the 'break-in' in the vicinity of the blocking of the diode Dl after the time t_2) makes it possible to say something about the advantageous reclosing time of the first switch S1. As already mentioned, this monitoring can also take place on the basis of a secondary winding L2.
  • the determination of the time point of the zero crossing or the demagnetization can also take place by means of a threshold value monitoring (on exceeding or exceeding a threshold value, in the case of monitoring by means of a secondary winding L2, the polarity of the voltage depends on the winding sense of the secondary winding L2 to the coil From left).
  • Figure 5 shows a modification of the circuit of Figure 2a in that the arrangement of the inductor Ll, the diode Dl and the orientation of the LED track is modified (forms flyback converter or buck-boost converter).
  • FIG. 6 A development of the invention is shown in Fig. 6.
  • the detection of the achievement of the demagnetization of the coil Ll by monitoring the voltage across the winding L2 can be performed by a standard available control circuit IC.
  • This control circuit IC integrated circuit
  • corresponds to or contains the control unit SR shown in FIG. 2 to 5 has an input for detecting the achievement of the demagnetization of a coil by monitoring the voltage applied to a coil on the secondary winding.
  • the control circuit IC integrated circuit
  • Control circuit IC via an output for controlling a switch and via further monitoring inputs.
  • a first of these monitoring inputs can be used for specifying a reference value, such as a reference voltage.
  • a second monitoring input can be used for monitoring the achievement of a maximum voltage or even using a voltage measurement on a resistor for monitoring the achievement of a maximum current.
  • a third monitoring input can be used for the monitoring of another voltage or also for the activation and deactivation of the control circuit IC or the control of the control circuit IC controlled switch.
  • the control circuit IC monitors the current through the first switch S1 during the switch-on phase of the first switch S1 via the measuring resistor (shunt) Rs and the input 4 on the control circuit IC. As soon as the voltage which is tapped across the measuring resistor (shunt) Rs reaches a certain maximum value, the first switch S1 is opened.
  • the specification of the voltage required to open the first switch S1 amount of voltage can be adjusted by specifying a reference value (ie, a reference voltage) at the input 3 of the control circuit IC. For example, can be specified by a microcontroller, a reference voltage, which specifies the height of the maximum across the measuring resistor (shunt) Rs permissible voltage and thus the maximum permissible by the first switch Sl current. 20
  • the microcontroller can output a PWM signal, which is then smoothed by a filter 10 (for example an RC element) and thus applied as a DC signal with a specific amplitude to the input 3 of the control circuit IC.
  • a filter 10 for example an RC element
  • the amplitude of the signal at the input 3 of the control circuit IC can be adjusted.
  • the control circuit IC can detect the achievement of the demagnetization of the coil Ll via the input 5 on the basis of monitoring the voltage across a secondary winding L2 applied to the coil L1. This detection can be used as a reclosing signal. Once the demagnetization of the coil Ll has been detected by the control circuit IC, the control circuit IC can turn on the first switch Sl by driving through the output 7.
  • the control circuit IC can be activated and / or deactivated by applying a voltage at the input 1.
  • This voltage for activating at input 1 can also change between a high and a low level, wherein at high level, the control circuit IC is activated and at low level, at least the activation of the first
  • Switch Sl interrupts.
  • This control of the input 1 can be done by a microcontroller. For example, in this way, a low-frequency activation and deactivation of the control circuit IC and thus the control of the first switch Sl can be achieved and thus the low-frequency control of the operating circuit for dimming the LED. 21
  • a further reference voltage for the control circuit IC can also be preset via the amplitude of the signal present at this input. This voltage can, for example, also influence the height of the maximum permissible current through the switch or else the permissible duty cycle of the first switch S1.
  • the control circuit IC and / or the control circuit IC combined with the microcontroller can together form the control unit SR.
  • the duty cycle of the first switch Sl may also be dependent on a further voltage measurement within the operating circuit.
  • the control circuit IC can also be supplied with a voltage measurement Vsense.
  • This voltage measurement can be done via a voltage divider R40 / R47, for example, a monitoring or measurement of the voltage at the node between coil Ll and LED.
  • This voltage measurement Vsense can either be supplied to an additional input of the control circuit IC, as an additional variable additively to an already occupied input of the control circuit IC or else to an input of the microcontroller.
  • a system can be constructed in which on the one hand a simple control for dimming of LED by low-frequency PWM is made possible, on the other hand, a possible low-loss high-frequency operation of the
  • both the frequency and the duty cycle of a PWM signal for dimming LED, next to the height of the maximum allowable current can be specified by the first switch Sl.
  • the microcontroller can via a
  • the operating circuit may further include a further switch S2, which is arranged so that this second switch S2 can bridge the LED.
  • the second switch S2 may further be arranged so that it can take over the current through an existing high-impedance voltage measuring path or a similar existing high-resistance circuit arrangement of the LED or interrupt it.
  • the second switch S2 By connecting the second switch S2 in parallel to the LED, the latter can bridge the LED and thus deactivate it.
  • This method can be used to adjust the brightness (dimming) of the LED.
  • a possible variant would be that the dimming takes place via the second switch S2, while only the current through the LED is set and regulated via the activation of the first switch S1.
  • the second switch S2 can be additionally used only for dimming to a low dimming level.
  • the operating circuit due to the existing topology and control circuitry, is designed to limit the output voltage of the operating circuit (i.e., the voltage across the LED) to a maximum allowable value. If the LED is bridged by closing the second switch S2, then the operating circuit limits the output voltage such that no excessive current can flow, which can lead to possible destruction. This activation of the second switch S2 can be used, for example, only for dimming to a low dimming level.
  • the LEDs may only have second ones
  • Switch S2 which should be very low impedance, are dimmed, and the losses are still low.
  • the second switch S2 can be controlled so that it can take over the current through an existing high-impedance voltage measuring path or a similar existing high-resistance circuit arrangement of the LED.
  • the second switch S2 can be closed, so that the current flow through the LED is interrupted or avoided.
  • the second switch S2 can at least always be triggered following a low-frequency PWM packet in order to bridge or deactivate the LED (during the last discharge edge, ie at the end of a PWM pulse packet).
  • An interruption of the current through the LED can also be done by arranging the second switch S2 in series with the LED.
  • FIG. 6 may be extended to include a plurality of operating circuits according to FIG. 6.
  • the control circuits IC and the control units SR of the individual operating circuits are controlled by a common microcontroller.
  • the individual operating circuits can drive, for example, LED strands of different wavelength or color.
  • the microcontroller can be controlled via an interface (wireless or wired). In this case, control signals for adjusting the brightness or color or status information can be transmitted via the interface.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un circuit de fonctionnement destiné à au moins une LED, qui est alimenté par une tension continue ou une tension alternative redressée et qui fournit une tension d'alimentation à au moins une LED au moyen d'une bobine (L1) et d'un premier commutateur (S1) synchronisé par une unité de commande et de régulation (SR). Lorsque le premier commutateur (S1) est sous tension, une énergie est stockée provisoirement dans la bobine qui se décharge par l'intermédiaire d'une diode (D1) et de la ou des LED lorsque le premier commutateur (S1) est hors tension. Un condensateur (C1) disposé parallèlement à la ou aux LED maintient le courant traversant la LED pendant la phase de démagnétisation de la bobine (L1) ; une première unité de détection (SE1) produit un premier signal de détection (SES1) dépendant du flux de courant traversant le premier commutateur (S1) ; et/ou une deuxième unité de détection (SE2) détecte la démagnétisation complète de la bobine (L1) et produit un signal de détection (SES2). L'unité de commande et de régulation (SR) reçoit et traite les signaux de détection (SES1, SES2) et remet le premier commutateur (S1) sous tension au moment où la bobine (L1) est démagnétisée et/ou la diode (D1) arrêtée.
EP09752099A 2008-10-20 2009-10-16 Circuit de fonctionnement destiné à des led Active EP2345308B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT5992008 2008-10-20
PCT/EP2009/007455 WO2010046065A1 (fr) 2008-10-20 2009-10-16 Circuit de fonctionnement destiné à des led

Publications (2)

Publication Number Publication Date
EP2345308A1 true EP2345308A1 (fr) 2011-07-20
EP2345308B1 EP2345308B1 (fr) 2012-08-29

Family

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Country Status (6)

Country Link
US (1) US8525442B2 (fr)
EP (1) EP2345308B1 (fr)
CN (1) CN102187736B (fr)
DE (1) DE112009002593A5 (fr)
GB (1) GB2476609B (fr)
WO (1) WO2010046065A1 (fr)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8488342B2 (en) 2008-10-21 2013-07-16 On-Bright Electronics (Shanghai) Co., Ltd. Systems and methods for constant voltage mode and constant current mode in flyback power converters with primary-side sensing and regulation
WO2011130770A1 (fr) * 2010-04-21 2011-10-27 Tridonic Gmbh & Co. Kg Ballast pour diodes électroluminescentes
JP5828102B2 (ja) * 2010-12-20 2015-12-02 パナソニックＩｐマネジメント株式会社 Ｌｅｄ点灯装置及びそれを用いた照明器具
JP5821023B2 (ja) * 2011-03-18 2015-11-24 パナソニックＩｐマネジメント株式会社 固体発光素子点灯装置及びそれを用いた照明器具
JP5576819B2 (ja) * 2011-03-23 2014-08-20 パナソニック株式会社 点灯装置及び照明器具
CN102769383B (zh) 2011-05-05 2015-02-04 广州昂宝电子有限公司 用于利用初级侧感测和调整进行恒流控制的系统和方法
US8723425B2 (en) 2011-06-17 2014-05-13 Stevan Pokrajac Light emitting diode driver circuit
ES2708694T3 (es) * 2011-08-08 2019-04-10 Signify Holding Bv Fuente de luz LED de parpadeo reducido
KR20130043023A (ko) * 2011-10-19 2013-04-29 삼성전자주식회사 Ｌｅｄ 구동 장치, ｌｅｄ 구동 방법 및 이를 적용한 디스플레이 장치
JP5884046B2 (ja) * 2011-10-24 2016-03-15 パナソニックＩｐマネジメント株式会社 点灯装置および、これを用いた照明器具
JP5838346B2 (ja) * 2011-10-24 2016-01-06 パナソニックＩｐマネジメント株式会社 点灯装置および、これを用いた照明器具
CN105246194B (zh) 2011-11-15 2018-07-03 昂宝电子（上海）有限公司 用于各种操作模式中的恒流控制的led照明系统和方法
CN102523650B (zh) * 2011-12-02 2014-04-02 蒋晓博 一种led电流检测和控制电路
CN103167665B (zh) 2011-12-08 2014-10-08 昂宝电子（上海）有限公司 用于调整发光二极管电流的系统
JP5828074B2 (ja) * 2012-02-13 2015-12-02 パナソニックＩｐマネジメント株式会社 点灯装置および、これを用いた照明器具
CN103368400B (zh) 2012-03-31 2015-02-18 昂宝电子（上海）有限公司 用于恒压控制和恒流控制的系统和方法
CN102655704A (zh) * 2012-04-18 2012-09-05 芯巧科技股份有限公司 发光二极管驱动电路
CN102790531B (zh) 2012-07-24 2015-05-27 昂宝电子（上海）有限公司 用于电源变换系统的电流控制的系统
AT14041U1 (de) * 2013-04-30 2015-03-15 Tridonic Gmbh & Co Kg Betriebsschaltung für Leuchtdioden mit Filterelement
AT14074U1 (de) * 2013-04-30 2015-04-15 Tridonic Gmbh & Co Kg Betriebsschaltung für LED
AT13857U1 (de) * 2013-04-30 2014-10-15 Tridonic Gmbh & Co Kg Fehlererkennung für Leuchtdioden
AT13981U1 (de) * 2013-04-30 2015-02-15 Tridonic Gmbh & Co Kg Betriebsschaltung für Leuchtdioden
CN103533710B (zh) * 2013-10-12 2015-10-28 辉芒微电子（深圳）有限公司 一种led驱动器
CN103533711A (zh) * 2013-10-18 2014-01-22 深圳市富满电子有限公司 一种非隔离led驱动电路
CN103547042B (zh) * 2013-11-07 2016-03-02 成都启臣微电子有限公司 基于功率因数校正的led恒流驱动电路
DE102014118795A1 (de) * 2013-12-18 2015-06-18 Panasonic Intellectual Property Management Co., Ltd. Beleuchtungsbaugruppe und Leuchte
SG2014010839A (en) * 2014-02-11 2015-09-29 Opulent Electronics Internat Pte Ltd Device and method for providing regulated current to an electrical load
CN103956900B (zh) 2014-04-23 2017-08-11 广州昂宝电子有限公司 用于电源变换系统中的输出电流调节的系统和方法
US9380669B2 (en) * 2014-06-06 2016-06-28 Vastview Technology Inc. Low flicker LED driving circuit with high power factor
DE102014114749A1 (de) * 2014-10-10 2016-04-14 Apa Adelfang & Parbel Gmbh & Co. Kg Hinterleuchtete Werbebande und Verfahren zum Einstellen der Helligkeit der Werbebande
JP6417930B2 (ja) 2014-12-25 2018-11-07 ミツミ電機株式会社 非絶縁型電源装置
CN104918392B (zh) * 2015-07-10 2018-03-16 昂宝电子（上海）有限公司 用于向一个或多个发光二极管提供输出电流的系统
CN107132404B (zh) * 2017-05-15 2019-11-05 矽力杰半导体技术(杭州)有限公司 检测方法、检测电路、控制器及开关电源
JP6533980B2 (ja) * 2018-01-17 2019-06-26 三菱電機株式会社 照明器具
CN110768510B (zh) 2019-09-30 2022-09-20 上海矽力杰微电子技术有限公司 控制电路和方法以及功率变换器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1167471A (ja) * 1997-08-26 1999-03-09 Tec Corp 照明装置
FI104034B (fi) 1998-03-30 1999-10-29 Teknoware Oy Menetelmä ja laite tehon syöttämiseksi valodiodeille
FI106770B (fi) 1999-01-22 2001-03-30 Nokia Mobile Phones Ltd Valaiseva elektroninen laite ja valaisumenetelmä
US7071762B2 (en) 2001-01-31 2006-07-04 Koninklijke Philips Electronics N.V. Supply assembly for a led lighting module
DE10230103B4 (de) * 2002-07-04 2012-10-31 Tridonic Ag Stromversorgung für Lumineszenzdioden
WO2007049198A1 (fr) 2005-10-27 2007-05-03 Koninklijke Philips Electronics N.V. Systeme d'excitation d'une charge de courant constant
US8169185B2 (en) * 2006-01-31 2012-05-01 Mojo Mobility, Inc. System and method for inductive charging of portable devices
DE102006034371B4 (de) 2006-04-21 2019-01-31 Tridonic Ag Betriebsschaltung und Betriebsverfahren für Leuchtdioden
US8067896B2 (en) * 2006-05-22 2011-11-29 Exclara, Inc. Digitally controlled current regulator for high power solid state lighting
US8237372B2 (en) 2006-12-04 2012-08-07 Nxp B.V. Electronic device for driving light emitting diodes
CN102090145B (zh) * 2008-07-09 2013-09-25 Nxp股份有限公司 开关模式功率转换器及其操作方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010046065A1 *

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GB201106312D0 (en) 2011-06-01
WO2010046065A1 (fr) 2010-04-29
US8525442B2 (en) 2013-09-03
GB2476609A (en) 2011-06-29
DE112009002593A5 (de) 2011-09-29
CN102187736B (zh) 2013-06-19
US20110199023A1 (en) 2011-08-18
EP2345308B1 (fr) 2012-08-29
GB2476609B (en) 2014-02-19
CN102187736A (zh) 2011-09-14

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