WO2011130770A1 - Ballast pour diodes électroluminescentes - Google Patents

Ballast pour diodes électroluminescentes Download PDF

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Publication number
WO2011130770A1
WO2011130770A1 PCT/AT2011/000204 AT2011000204W WO2011130770A1 WO 2011130770 A1 WO2011130770 A1 WO 2011130770A1 AT 2011000204 W AT2011000204 W AT 2011000204W WO 2011130770 A1 WO2011130770 A1 WO 2011130770A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
led
coil
sensor unit
sensor
Prior art date
Application number
PCT/AT2011/000204
Other languages
German (de)
English (en)
Inventor
Horst Knödgen
Original Assignee
Tridonic Gmbh & Co. Kg
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 Gmbh & Co. Kg filed Critical Tridonic Gmbh & Co. Kg
Priority to DE112011101416T priority Critical patent/DE112011101416A5/de
Publication of WO2011130770A1 publication Critical patent/WO2011130770A1/fr

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]
    • 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
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/385—Switched mode power supply [SMPS] using flyback 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
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/39—Circuits containing inverter bridges

Definitions

  • the invention relates to an operating circuit with
  • Semiconductor light sources such as light emitting diodes have become increasingly interesting for lighting applications in recent years. The reason for this is, among other things, that crucial technical
  • Brightness as well as the light efficiency (light output per watt) of these light sources could be achieved.
  • LEDs have become an attractive alternative to conventional light sources such as incandescent or
  • LED Light Emitting Diode
  • LEDs Light emission from LEDs correlates with the current flow through the LEDs. For brightness control, LEDs are therefore always operated in a mode in which the current flow through the LED is controlled.
  • One or more LEDs preferably switching regulator, such as step-down converter or buck
  • Such a switching regulator is
  • a control unit controls a high-frequency clocked switch (for example, a
  • the LED current shows a
  • 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.
  • the function of the operating device is now to set a desired mean current flow through the LEDs and the temporal fluctuation of the current, due to the high-frequency switching on and off of the switch
  • the LEDs are supplied by the operating device with low-frequency (typically with a frequency in the range of 100-1000 Hz) pulse packets with (in the time average) 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 adjusted by the frequency of the
  • Pulse packets are controlled; the LEDs can
  • 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.
  • 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 the basic circuit.
  • the operating circuit is supplied with a DC voltage or a rectified AC voltage U0.
  • timings 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, in order to achieve the lowest possible ripple, a rapid sequence of inputs and AusHaltVorêtn is necessary. The slope
  • a supply voltage for at least one LED is by means of a coil and a by a
  • Control unit clocked first switch
  • a sensor unit which monitors the current flow through the LED and produces a sensor signal.
  • the sensor signal is supplied to the control unit and processed there, the
  • Control unit the switch according to the
  • the invention also relates to an operating circuit for at least one LED, which is supplied with a supply voltage, comprising at least one coil and at least one clocked by a control / regulating unit switch, wherein the operating circuit is a supply voltage for
  • Sensor unit which monitors the current flow through the LED and generates a sensor signal depending on the current flow through the LED, and that the Se sorsignal the control / regulating unit is supplied and processed there, wherein the control unit drives the switch according to the supplied sensor signal, wherein the
  • the Sensor unit is formed by a Hall sensor.
  • the operating circuit preferably includes a capacitor disposed in parallel with the at least one LED and which maintains the current through the LED during the phase of demagnetization of the coil so that the current through the LEDs is smoothed.
  • the operating circuit has a further sensor unit (referred to as first) which generates a further (first) sensor signal dependent on the current flow through the first switch, and the sensor unit (referred to as second) designed as a Hall sensor, which detects the Current flow through the coil, preferably the achievement of the demagnetization of the coil detected and generates a sensor signal.
  • the sensor signals are supplied to the control unit. and edited.
  • the invention also relates to a method for operating at least one LED by means of a
  • Switching regulator circuit wherein a supply voltage for at least one LED is provided by means of a coil and a switch clocked by a control / regulating unit,
  • the current flow through the LED is monitored by a Hall sensor as a sensor unit, this sensor unit outputs a feedback signal and a control / regulating unit switches the switch depending on the
  • 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.
  • 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 current flow through the LED falls below a minimum reference value.
  • the first sensor unit is a measuring resistor (shunt).
  • Figure la shows a circuit arrangement according to the
  • FIG. 1 b shows a diagram with the time profile of the LED current in the circuit arrangement of FIG. 1 a (prior art)
  • FIG. 2 a shows a first example of an operating circuit (buck) according to the invention for LEDs.
  • FIG. 2 b shows a diagram which is time-dependent
  • FIG. 3 and Figure 4 show special operating circuit (Buck) for LEDs
  • FIG. 5 shows a modification of the circuit of FIG. 2a (Buck Boost).
  • FIG. 6 shows a further specific embodiment of the invention
  • Figure la and Figure lb show the state of the art. If a secondary winding is shown in the figures as a tap on the coil LI, this secondary winding is shown symbolically instead of the Hall sensor (second sensor unit SE2), which can be coupled to the coil LI and monitor the current through the LED.
  • second sensor unit SE2 second sensor unit SE2
  • 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).
  • 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.
  • An advantage of the present invention is that the operating circuit adapts very flexibly to the type and number of serially connected LEDs.
  • the circuit is supplied with a DC voltage U0, which of course can also be a rectified AC voltage.
  • the LEDs are connected in series with a coil LI and a first switch Sl.
  • the circuit arrangement has a diode D1 (the diode D1 is parallel to the LEDs and the coil LI
  • Freewheeling phase discharges the capacitor Cl 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.
  • the first switch Sl is preferably a
  • 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. In the state of
  • Run power must be used for the first switch Sl a high-quality device with a very short switching time to the switching losses in one
  • 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.
  • a control and / or regulating unit SR is further provided, which specifies the timing of the first switch S1 for controlling the LED power.
  • the control unit SR uses to set the exact turn-on and turn-off timing of the first one
  • Switches Sl as input signals from a first sensor unit SEI and / or signals from a second
  • the first sensor unit SEI is in series with the first
  • the first sensor unit SEI may be, for example, a
  • Measuring resistor (shunt or current measuring resistor) act.
  • the sensor unit SE2 can also perform the function of
  • Sensor unit SEI take over by exceeding or reaching a maximum value for the LED current i_LED or the coil current i_L is detected and the
  • Control unit SR is signaled. To monitor the current flow can now the
  • the second sensor unit SE2 is arranged within the current branch, which is traversed by the current during the free-wheeling hare, preferably in the vicinity or on the coil LI. With the aid of the second sensor unit SE2, the control unit / control unit SR a
  • the first switch Sl is set appropriate time for the switch-on of the first switch Sl. According to the invention, the first switch Sl
  • this time is preferably switched on when the current through the coil LI has fallen below a certain value or for the first time is zero (or at least very low). In the latter case, this time is
  • the current through the LEDs shows only slight ripple and does not vary greatly. This can be achieved by virtue of the fact that the LED current can be kept in a predetermined range due to the inventive monitoring of the LED current through a Hall sensor.
  • the control unit SR turns off the first switch when the current through the first switch, a
  • the Hall sensor as the second sensor unit SE2 can also serve to detect a demagnetization of the coil LI.
  • the smoothing effect of a parallel to the LEDs connected capacitor Cl can be used.
  • the capacitor Cl can take over the supply of the LED.
  • the enlarged view shows the current flow
  • the first switch Sl is closed and current begins to flow through the LED and the coil LI.
  • the current i_L shows an increase according to an exponential function, with the one of interest here
  • i_LED Differs from i_L in that part of the current i_L contributes to the charge of the capacitor Cl.
  • the opening of the first switch Sl at time t_l (for example, when a desired maximum
  • 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. In this. Phase are reloaded parasitic capacitances at the diode Dl and other parasitic capacitances in the remaining circuit.
  • Switch Sl and the coil LI change very quickly during this period.
  • the voltage at the node Ux drops to a low value (due to the diode Dl blocking).
  • An advantageous switch-on time t_3 for the first switch Sl is now given when the current i_L reaches the zero crossing, or at least the vicinity of the zero crossing. At this time, the coil LI is 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 LI. A reconnection is also already possible at the time t_2 or shortly before, because the current through the coil LI 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 LI.
  • the current i_L through the coil LI and the LED can be detected, for example, by means of a Hall sensor. Additionally or alternatively, therefore, other / other variables can be used, which are for the detection of an advantageous
  • the capacitor Cl is not present or has only a very small capacitance
  • the current i_L corresponds to the current i_LED through the LED, whereby current is monitored by monitoring the current i_L (which flows through the coil LI)
  • i_LED can be monitored or recorded by the LED.
  • the magnetization state of the coil LI can be detected.
  • the second sensor unit SE2 may be a Hall sensor, which is coupled to the coil LI or integrated in it.
  • Range comparator which can detect the exceeding or falling below a threshold value for the current through the LED i_LED or the coil current i_L.
  • 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.
  • Switch Sl can therefore be triggered below the voltage Ux below a certain threshold.
  • Control unit SR turns on the first switch Sl again at the time when the coil LI
  • the second sensor unit SE2 can consist of a inductively coupled to the coil LI secondary winding L2 or from a voltage divider (Rl, R2) at the node Ux.
  • the control unit SR uses the information from the first sensor unit SEI and / or the second
  • Control / regulation unit SR can take place, for example, in the form of PWM signals.
  • the frequency of the PWM signal is typically on the order of more than 100 Hz up to the MHz range.
  • FIG. 3 and Figure 4 show specific embodiments of the invention.
  • FIG. 3 shows a special 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 located between the coil LI, the diode Dl and the switch Sl.
  • a voltage divider is, for example, a
  • the measuring resistor (shunt) RS is used for current detection by the first switch Sl.
  • Node Ux (in particular of the 'break-in' shortly after the diode Dl is blocked near 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.
  • Switch Sl can therefore be triggered below the voltage Ux below a certain threshold.
  • a second switch S2 is parallel to the LEDs and the
  • Capacitor Cl is arranged.
  • 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 accelerates. 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
  • 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. For example, an even lower dimming level can be achieved by suitable activation of the second switch S2.
  • 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 U0 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 parallel to the LEDs and the capacitor Cl for accelerated discharge of the capacitor Cl or for bridging the LED not only on the specific
  • Embodiment of the circuit arrangement of Figure 3 is limited, but in all embodiments of the r
  • FIG. 4 shows a modification of the circuit in FIG. 3 in that current monitoring takes place on the coil LI.
  • the current at the coil LI can be detected, for example, by means of the Hall sensor, which is coupled to the coil Sl.
  • the Hall sensor is now used as
  • Sensor unit SE2 take place, which is symbolically represented as a secondary winding L2 as already explained.
  • the determination of the time for switching the switch S1 back on may also take place by means of a threshold value monitoring (to the undershooting or exceeding of a threshold value, to monitoring by means of a Hall sensor). It should be noted that the method for detecting an advantageous switch-on time for the first switch Sl by means of Hall sensor, of course, to others
  • flyback converter for example, for a so-called flyback converter or buck-boost converter or a so-called
  • Forward converter or forward converter.
  • FIG. 5 shows a modification of the circuit of FIG. 2a in that the arrangement of the coil LI, the diode D1 and the orientation of the LED path
  • FIG. 6 A development of the invention is shown in FIG. 6
  • Demagnetization of the coil LI by monitoring the Hall sensor can be performed by a standard available control circuit IC.
  • This control circuit IC Integrated Circuit
  • This control circuit IC has one
  • 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 to monitor the reaching of a maximum voltage or also by means of a voltage measurement on a
  • Resistance to monitor the achievement of a maximum current can be used.
  • a third monitoring input can be used to monitor a further voltage or to activate and deactivate the control circuit IC or the control of the control circuit IC
  • control circuit IC monitors the current through the first switch S1 during the first time
  • the required level of voltage may be adjusted by providing a reference value (i.e., a reference voltage) at the input 3 of the control circuit IC.
  • a reference value i.e., a reference voltage
  • a microcontroller For example, from a microcontroller a
  • the microcontroller may output a PWM signal that is then smoothed by a filter 10 (eg, an RC element) and thus as
  • Microcontroller can control the amplitude of the signal at
  • Input 3 of the control circuit IC can be adjusted.
  • the control circuit IC can via the input 5 based on the monitoring of the current at a coupled to the coil LI Hall sensor reaching the
  • 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
  • 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
  • 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, the height of the maximum allowable current through the switch
  • Microcontrollers can together form the control unit SR.
  • the duty cycle of the first switch Sl can also be determined by another voltage measurement within the
  • control circuit IC can also be supplied with a voltage measurement Vsense. About this voltage measurement can over a
  • Voltage divider R40 / R47 for example, a monitoring or measurement of the voltage at the junction between coil LI and LED done. This voltage measurement Vsense can either be another input of the
  • Control circuit IC as an additional variable additively fed to an already occupied input of the control circuit IC or 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
  • the microcontroller can control the dimming of the LED by low-frequency PWM via a signal which is fed to the input 1 of the control circuit IC.
  • microcontroller via a signal which is fed to the input 3 of the control circuit IC, the height of the maximum allowable current through the first switch Sl or the necessary
  • the operating circuit may further include another
  • Switch S2 included 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.
  • Switch Sl only the current through the LED is set and regulated. However, it can be combined to use the control of the two switches Sl and S2 for an optimized dimming control.
  • the second switch S2 can be additionally used only for dimming to a low dimming level.
  • the operating circuit is designed due to the existing topology and the control circuit so that the output voltage of the operating circuit (ie, the voltage across the LED) is limited 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
  • the LEDs can only be dimmed with second plates S2, which should be very low impedance, and the losses are still low.
  • the second switch S2 can be controlled so that the current through an existing
  • 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, that is to say at the end of a PWM
  • control circuits IC and the control units SR of the individual operating circuits are controlled by a common microcontroller.
  • Operating circuits can drive, for example, LED strands of different wavelength or color.
  • the control of the microcontroller can via a
  • the coil LI may also be a transformer, which is a potential separation of the LED relative to the feeding
  • Supply allows.
  • the LED supplying the switching regulator circuit as isolated flyback converter (flyback converter) or
  • Switching regulator circuit proposed, wherein by means of a coil LI and a clocked by a control / regulating unit SR switch Sl, a supply voltage for at least one LED is provided. The current flow through the LED is monitored by a Hall sensor as the second sensor unit SE2. This second
  • Sensor unit SE2 outputs a feedback signal and a control unit SR controls depending on the
  • the duty cycle and / or the drive frequency of the switch Sl depends on the feedback signal of the control unit SR
  • the Hall sensor can be on a semiconductor material
  • the Hall sensor can be arranged on an integrated circuit, wherein preferably also an evaluation circuit in the integrated circuit
  • the evaluation circuit may include, for example, an analog-to-digital converter, a current source and / or a digital signal processing circuit (for example a microcontroller, ASIC or DSP).
  • the evaluation circuit with a power supply
  • the Hall voltage is evaluated.
  • the Hall voltage is typical
  • the sensor unit SE2 (containing the Hall sensor) is coupled to the coil LI.
  • Sensor unit SE2 can be integrated, for example, in the coil LI. In this way, a good coupling of the Hall sensor and thus a reliable current monitoring of the LED current (corresponding to the coil current) can be achieved.- If the Hall sensor is already integrated in the production of the coil LI in this (for example on the Bobbin or attached to a winding), this can be arranged in a defined position, whereby the distance of the Hall sensor set to the coil LI. is. This is advantageous because the distance has influence on the height of the Hall voltage. But it can also be provided that a kind
  • Control unit SR to be detected sensor signals SES2 is used.
  • the control unit SR in a table for different current values (either by the coil LI or the LED, depending on the placement of the sensor unit SE2) assign different values of the sensor signal SES2. It can also be done a zero point adjustment. It can also be compared with the Hall sensor
  • Temperature fluctuations take place. It may, for example, a temperature sensor in the sensor unit SE2
  • the sensor unit SE2 (which contains the Hall sensor) may also contain protection circuits, for example against overvoltage. It can be on a compensation for
  • the sensor unit SE2 can also contain a plurality of Hall sensors. By using at least two
  • the Hall sensors can better compensate for variations due to positioning, temperature, or interference.
  • the sensor unit SE2 may have a common-mode rejection for evaluating the at least one Hall sensor. It may additionally or alternatively in particular at
  • Evaluation circuit as a sensor unit SE2 (containing the Hall sensor) data via radio or other wireless connection (such as via an air coil) to the control / SR SR transmitted. It can therefore be the supply of the sensor signals SES2 to the control / regulation unit SR via radio or another
  • Control / regulation SR done.
  • a connection detection during commissioning or connection of the supply voltage of the operating circuit can take place.
  • connection detection the connection between
  • this connection detection based on a recording of communication between the
  • control / regulating unit SR for example, a
  • Query sends to the sensor unit SE2 and waits for a corresponding response by the sensor unit SE2. Additionally or alternatively, a test measurement can be performed by the sensor unit SE2, wherein for the purpose of a
  • the measurement result is transmitted from the sensor unit SE2 to the control / regulation unit SR.

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

Abstract

L'invention concerne un procédé de fonctionnement d'au moins une DEL à l'aide d'un circuit de régulation grâce auquel, à l'aide d'une bobine (L1) et d'un commutateur (S1) cadencé par une unité de commande/régulation (SR), une tension d'alimentation est fournie pour au moins une DEL, caractérisé en ce que le flux de courant traversant la DEL est surveillé par un capteur à effet Hall servant d'unité de détection (SE2), cette unité de détection (SE2) fournit un signal de réaction et une unité de commande/régulation (SR) pilote le commutateur (S1) en fonction du signal de retour de l'unité de détection (SE2).
PCT/AT2011/000204 2010-04-21 2011-04-21 Ballast pour diodes électroluminescentes WO2011130770A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112011101416T DE112011101416A5 (de) 2010-04-21 2011-04-21 Betriebsschaltung für Leuchtdioden

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM261/2010 2010-04-21
AT2612010 2010-04-21

Publications (1)

Publication Number Publication Date
WO2011130770A1 true WO2011130770A1 (fr) 2011-10-27

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CN107231095A (zh) * 2016-03-23 2017-10-03 江苏美联集团有限公司 一种基于直流母线的反馈系统

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US20050276294A1 (en) * 2004-06-09 2005-12-15 Crawford Ian D Polyphase diode driver
DE102006034371A1 (de) 2006-04-21 2007-10-25 Tridonicatco Schweiz Ag Betriebsschaltung für Leuchtdioden
US20080197786A1 (en) * 2007-02-19 2008-08-21 Marlex Engineering Inc. impedance controlled electronic lamp circuit
WO2010004475A1 (fr) * 2008-07-09 2010-01-14 Nxp B.V. Convertisseur de puissance à découpage et son procédé de fonctionnement
WO2010046065A1 (fr) * 2008-10-20 2010-04-29 Tridonicatco Schweiz Ag Circuit de fonctionnement destiné à des led

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Publication number Priority date Publication date Assignee Title
WO2004057921A1 (fr) * 2002-12-19 2004-07-08 Koninklijke Philips Electronics N.V. Ensemble d'alimentation pour module d'eclairage a diodes electroluminescentes
US20050276294A1 (en) * 2004-06-09 2005-12-15 Crawford Ian D Polyphase diode driver
DE102006034371A1 (de) 2006-04-21 2007-10-25 Tridonicatco Schweiz Ag Betriebsschaltung für Leuchtdioden
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WO2010004475A1 (fr) * 2008-07-09 2010-01-14 Nxp B.V. Convertisseur de puissance à découpage et son procédé de fonctionnement
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CN107231095A (zh) * 2016-03-23 2017-10-03 江苏美联集团有限公司 一种基于直流母线的反馈系统

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