EP3064041A1 - Schnittstelle mit verbessertem sendezweig - Google Patents
Schnittstelle mit verbessertem sendezweigInfo
- Publication number
- EP3064041A1 EP3064041A1 EP14783603.5A EP14783603A EP3064041A1 EP 3064041 A1 EP3064041 A1 EP 3064041A1 EP 14783603 A EP14783603 A EP 14783603A EP 3064041 A1 EP3064041 A1 EP 3064041A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- branch
- optocoupler
- interface
- bus
- receiving branch
- 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
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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/18—Controlling the light source by remote control via data-bus transmission
- H05B47/183—Controlling the light source by remote control via data-bus transmission using digital addressable lighting interface [DALI] communication protocols
-
- 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
- H05B44/00—Circuit arrangements for operating electroluminescent light sources
-
- 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]
- H05B45/20—Controlling the colour of the light
- H05B45/22—Controlling the colour of the light using optical feedback
Definitions
- the present invention relates to an interface for bidirectional communication with an electronic operating device for at least one lamp and a ballast with such an interface.
- the known interface is designed for communication according to the DALI standard, in which, with an inactive bus, a predetermined DC voltage is applied to the lines. This predetermined DC voltage is reduced only in the case of a signal transmission, while the constant DC voltage is applied again when no signals are transmitted.
- the capacitor C2 is charged. This makes sense here, since when a signal transmission according to DALI standard takes place, just the voltage applied to the bus voltage drops to (logical) zero or to the voltage that is defined for the low-level voltage. This can be done in the Return channel (transmission branch) of the circuit can be detected immediately.
- Return channel refers to the channel away from the interface as the channel for the transmission mode
- the "send branch” is according to the
- a DSI signal arrives at the connection for the operating device, that is to say on the secondary side, of the known interface, then the voltage rises abruptly from the value for the first logic state, for example ⁇ 6.5 volts, to a predetermined direct voltage, eg 10 - 15 volts (high level, ie the voltage value, which is interpreted as the second logical value, eg 1).
- a predetermined direct voltage eg 10 - 15 volts
- the incoming signal be recognized immediately to ensure reliable detection of the DSI signal.
- the transfer is Manchester encoded, ie a data bit is transmitted by a change from low level to high level (logical 0) or a change from high level to low level (logical 1).
- the capacitor C2 from the known circuit has a disturbing effect, since the falling edge (logic 1) or the first bit of the DSI signal can not be reliably detected by the known interface.
- capacitor C2 is partially charged after accepting the high level (for about 833 ys) due to the 2 mA input power source.
- the capacitor C2 continues to charge.
- the first logical state (for example 1) at the optocoupler output of optocoupler U2 can not immediately be detected after falling below 6.5 volts.
- the capacitor C2 is in fact still partially charged even after falling below the low level and bypasses in non-charged or partially charged state, the Zener diode ZI, which otherwise immediately interrupts the current flow in the optocoupler U2 falls below the Zener voltage (low level).
- Receiving branch has a current source which can be fed from a bus at rest voltage leading, wherein the power source supplies at least the transmitting branch with energy and the transmitting branch has an optocoupler, wherein in the receiving branch an electrical Energy storage, for example, one or more capacitors, is provided, which is charged by the power source, and which is connected via at least one resistor in series with the secondary side of the optocoupler of the transmitting branch
- the resistor can be connected to the energy store and the optocoupler.
- the energy store and the resistor can be dimensioned such that during the transmission period of a digital bit, during which a connectable bus is short-circuited, a discharge current flows.
- the edge time duration of a digital bit shorting a connectable bus may be less than 25mS, preferably less than 15yS.
- the energy store can be charged without charge current control element or via a charging current control transistor, starting from the current source.
- Fig. 1 shows an interface according to the prior art.
- Fig. 2 is a schematic representation of a
- Fig. 3 is a further schematic representation
- FIG. 4 shows a first embodiment according to the invention.
- Fig. 5 shows a second embodiment according to the invention.
- Fig. 2 shows a circuit arrangement.
- a field effect transistor (FET, JFET) J1 and a resistor R7 form a current source J1, R7, which provides a charging current of predetermined height at an energy store, which is referred to below as an example as capacitor C1.
- the optocoupler Q5 is ultimately traversed by a constant current (input current minus charging current).
- a nonlinear component in particular a Zener diode D9
- the term "zener diode” will therefore be used hereinafter to represent the nonlinear component.
- the distribution of the current is selected such that the charging current for the capacitor is lower than the current through the optocoupler, preferably in a range of 30% to 70%.
- the charging current for capacitor C1 is now tapped at the input of the optocoupler Q3 of the receiving branch (see measuring point I between diode D6 and opto-coupler Q3)
- the capacitor is thus part of a path which is connected in parallel to a path which connects the Primary side of the receiving optocoupler Q3 has.
- a falling edge of a DSI signal that is to say in particular the first bit of the DSI command (start bit, logic 1, coded with falling edge)
- start bit logic 1, coded with falling edge
- the capacitor C1 Due to the fact that the capacitor C1 is not first discharged after the high level has been applied, it must be detected directly when the voltage drops to the low level.
- a common power source can be used.
- the interface can also be used for signal reception according to the DALI standard in addition to the signal reception according to the DSI standard. It is essential that the arrangement according to the invention allows, in particular, the very rapid detection of incoming signals, even when the idle state of the bus voltage is close to 0 volts or 0 volts.
- the circuit arrangement shown in FIG. 2 is designed to counteract the negative influence of a current source by the use of a large-sized capacitor (with a capacitance of, for example, 1-6 yF), that of the current source with the FET Jl and the resistor R7 is charged to about 5.5 volts or more.
- a large-sized capacitor with a capacitance of, for example, 1-6 yF
- the current source with the FET Jl and the resistor R7 is charged to about 5.5 volts or more.
- only a parasitic influence of the drain-source capacitance of the FET Jl is present, which however can be reduced by a suitable dimensioning of the capacitance lying on the gate.
- FIG. 2 shows a schematic representation of the interface with a first primary-side control connection and a second primary-side control connection.
- a DALI control unit SDALI and, on the other hand, a power switch (not shown) are coupled to the primary-side control input.
- a resistor Rl is arranged in series with the first primary-side control connection. Between the resistor Rl and the second primary-side control terminal, a rectifier is coupled, which comprises four diodes Dl to D4. Between a first and a second
- Gleiehrichterausgangsanschl is a switch XI coupled, in particular its distance working electrode - reference electrode.
- a current source which comprises two bipolar transistors Q1, Q2 and two ohmic resistors R2, R3, is coupled to the rectifier output terminal. Coupled to the output of the current source is a first optocoupler Q3 which is coupled in series with a zener diode D9. In parallel with the zener diode D9 is a series circuit of a diode D6, the current source Jl, R7 consisting of FET Jl and resistor R7, and a capacitance Cl coupled. A second optocoupler Q5 is supplied via the current source R7, Jl.
- the optocoupler Q3 in the receiving branch can deliver signals via an output of the interface with a first and a second output terminal, while the second optocoupler Q5 is provided in the transmitting branch via a signal input with a first and a second signal terminal for transmitting signals.
- the output of the optocoupler Q5 is connected to the control electrode of the switch XI, in which path a diode D13 and a resistor R9 are connected in series.
- Parallel to the control electrode of the switch XI is a parallel circuit of a capacitor C3 and a resistor RH coupled, which act as noise filters. Between capacitor C3 and resistor RH is coupled another bipolar transistor Q4 whose base is coupled to the higher side of resistor RH.
- R7 to charge the capacitor Cl (this essentially corresponds to the Capacitor C2 of the known circuit) is then given the full functionality also in the transmission of signals according to the DSI standard, since a loading of the capacitor Cl no longer occurs at falling edge, but also according to DALI standard.
- the capacitor Cl is therefore always charged, whereby bridging the Zener diode D9 is omitted by a non-charged or partially charged state with falling edge.
- the capacitor Cl is charged in about 400 milliseconds to about 5.5 volts or more, so sure after 600 milliseconds (this corresponds to the DALI standard) from the
- the charging current is limited by the current source consisting of FET Jl and resistor R7 to, for example, 100 ⁇ . However, this value may be higher or lower depending on the components used.
- the optocoupler Q5 is always driven with a defined current, wherein the current through FET Jl is chosen so that in the case of a transmission of a DSI signal, an influence on the bit time, i. the time in which a bit can be sent from the sender to the receiver is small.
- the circuits shown can be modified as follows. If, for example, the drive voltage for the FET XI, ie the voltage at C1, is to be increased, then an optocoupler Q5 with a drive current of approximately 1 Milliamps instead of eg 5 milliamps (mA) can be used. This can be, for example, a type TLP621 or TLP624 optocoupler from Toshiba. By reducing the optocoupler current to 1 milliampere, more current (eg, 600 microamps) can be allowed to charge the capacitance Cl, causing the voltage at Cl to reach its setpoint more quickly, thus reaching an even higher level at the time of transmission after 600 milliseconds Has.
- diodes D6 and D13 can be replaced by Schottky diodes, whereby the control voltage at the gate of the switch XI, if necessary, can be increased by about 0.5 volts. This then allows use of a smaller sized FET XI.
- the invention relates in particular to the improvement in terms of the signal shape and the signal repetition in the case of digital bits to be transmitted in the transmitting branch.
- edges can be achieved with a duration of less than 25 ms, preferably even less than 15 ms.
- a bus carrying potential at idle state for example the DALI bus
- the two terminals for connecting two bus lines are respectively shown on the left side, for example for a DALI bus.
- DALIin 1 On the right side in each case one with DALIin 1 designated optocoupler is shown.
- a power source the Darlington circuit Q90, Q95
- the bus incoming signals, which are then transmitted isolated from the optocoupler.
- DALIin On the secondary side of the optocoupler DALIin then follows the further evaluation by a control circuit in the operating device for lighting and the control of the light source according to the information received via the bus.
- the digital signals to be transmitted by the control circuit of the operating device for lamps are applied and transferred to the secondary side in an isolated manner.
- the secondary side then has a circuit that can selectively short-circuit the bus.
- the power supply for the area of the circuit between the secondary side of the optocoupler U91 and the bus via the bus voltage and the regulated current source Q90, Q95 Basically, the power supply for the area of the circuit between the secondary side of the optocoupler U91 and the bus via the bus voltage and the regulated current source Q90, Q95.
- the power supply can therefore only take place from, for example, capacitances in the interface circuit itself, which represents an uncontrolled power supply, which thus leads to problems with the exact setting of the edge profile, but also to feedback effects, which in turn can lead to ringing.
- Interface circuit are recorded, which in turn slow down the temporal response. After all, this ultimately leads to a limitation in terms of adjustable edge characteristics and bit repetition rates.
- the current source Q90, Q95 which is supplied from the bus voltage, charges an electrical energy store, in the example shown, the capacitor C94.
- This charging preferably takes place without current regulators present between the current source Q90, Q95 and the capacitor C94.
- the transistor linear regulator previously shown in the exemplary embodiments can also be present here.
- the energy storage capacitor C94 and the discharge current defining resistive resistor R100 are tuned such that the energy storage capacitor C94 is not fully discharged during the transmission period, ie during the short circuiting of the bus voltage and thus safe throughout the duration of the transmission bit (shorting the bus ) flows through a constant discharge current through the resistor R100 and the secondary side of the optocoupler U91.
- a switch Q96 is now provided in the receiving branch, which has the receiving optocoupler U90.
- This switch Q96 may, for example, be a transistor, such as a bipolar transistor, in particular, as shown in the present example, a PNP bipolar transistor.
- the transistor Q96 is connected at its base to a Zener diode Z95.
- the switch (transistor) Q96 is turned on (turned on), thus allowing current flow on the primary side of the receiving optocoupler U90. This current flow is described as already in connection with the preceding embodiments, fed by the current source R90, R91, Q90, Q95.
- an energy storage element in particular a capacitor C95, is furthermore connected in the path in front of the Zener diode Z95. More specifically, this capacitor C95 is connected between the connection point of the base of the transistor Q95 under the cathode of the diode Z95 and the junction point of the emitter of the transistor Q96 and the cathode of the reception optical coupler U90. This capacitor C95 now causes a short delay of the switching of the transistor Q96, if sufficient voltage is applied from the side of the bus.
Landscapes
- Dc Digital Transmission (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013221848.6A DE102013221848B4 (de) | 2013-10-28 | 2013-10-28 | Schnittstelle mit verbessertem Sendezweig, entsprechendes Gebäudetechnik-Bussystem, Vorschaltgerät mit derartiger Schnittstelle sowie Leuchte mit derartigem Vorschaltgerät |
| PCT/EP2014/071674 WO2015062837A1 (de) | 2013-10-28 | 2014-10-09 | Schnittstelle mit verbessertem sendezweig |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3064041A1 true EP3064041A1 (de) | 2016-09-07 |
| EP3064041B1 EP3064041B1 (de) | 2022-11-30 |
Family
ID=51690380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14783603.5A Active EP3064041B1 (de) | 2013-10-28 | 2014-10-09 | Schnittstelle mit verbessertem sendezweig |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9585233B2 (de) |
| EP (1) | EP3064041B1 (de) |
| CN (1) | CN105532075B (de) |
| DE (1) | DE102013221848B4 (de) |
| WO (1) | WO2015062837A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170132050A (ko) * | 2016-05-23 | 2017-12-01 | 엘지이노텍 주식회사 | Dali 인터페이스 및 이를 포함하는 전원장치 |
| CN107820355A (zh) * | 2017-12-01 | 2018-03-20 | 赛尔富电子有限公司 | 一种带有自举功能的dali接口电路 |
| WO2019144373A1 (en) | 2018-01-26 | 2019-08-01 | Tridonic Gmbh & Co Kg | Dali circuit, controlling method and equipment |
| WO2020069980A1 (en) * | 2018-10-02 | 2020-04-09 | Signify Holding B.V. | A digital addressable lighting interface, dali, enabled communication device for transmitting messages over a communication bus, as well as a corresponding method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5146357A (en) * | 1990-05-04 | 1992-09-08 | Buffton Corporation | Data communications system that prevents undesired coupling between data stations |
| DE10113367C1 (de) * | 2001-03-20 | 2003-01-02 | Vossloh Schwabe Elektronik | Interfaceschaltung |
| DE10329876B4 (de) | 2003-07-02 | 2016-06-02 | Tridonic Gmbh & Co Kg | Schnittstelle für ein Lampenbetriebsgerät mit niedrigen Standby-Verlusten und Verfahren zur Ansteuerung eines Lampenbetriebsgeräts über eine derartige Schnittstelle |
| US7764479B2 (en) * | 2007-04-18 | 2010-07-27 | Lutron Electronics Co., Inc. | Communication circuit for a digital electronic dimming ballast |
| DE102009016904B4 (de) | 2009-04-08 | 2012-03-01 | Osram Ag | Schnittstelle zum Ansteuern eines elektronischen Vorschaltgeräts |
| WO2011135098A1 (de) * | 2010-04-30 | 2011-11-03 | Tridonic Gmbh & Co Kg | Spannungsfeste schnittstellenschaltung |
| US9131549B2 (en) | 2012-04-12 | 2015-09-08 | Koninklijke Philips N.V. | Digital communication interface circuit for line-pair with individually adjustable transition edges |
| US9439270B2 (en) * | 2012-10-17 | 2016-09-06 | Koninklijke Philips N.V. | Digital communication receiver interface circuit for line-pair with duty cycle imbalance compensation |
| EP2770637B1 (de) * | 2013-02-22 | 2015-08-19 | Siemens Aktiengesellschaft | Optokoppleranordnung und Ein- und/oder Ausgabebaugruppe |
-
2013
- 2013-10-28 DE DE102013221848.6A patent/DE102013221848B4/de active Active
-
2014
- 2014-10-09 EP EP14783603.5A patent/EP3064041B1/de active Active
- 2014-10-09 WO PCT/EP2014/071674 patent/WO2015062837A1/de not_active Ceased
- 2014-10-09 US US15/024,501 patent/US9585233B2/en active Active
- 2014-10-09 CN CN201480049839.2A patent/CN105532075B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105532075B (zh) | 2018-09-25 |
| EP3064041B1 (de) | 2022-11-30 |
| WO2015062837A1 (de) | 2015-05-07 |
| US20160234918A1 (en) | 2016-08-11 |
| DE102013221848A1 (de) | 2015-04-30 |
| US9585233B2 (en) | 2017-02-28 |
| DE102013221848B4 (de) | 2025-01-16 |
| CN105532075A (zh) | 2016-04-27 |
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