Abstract: A safety flashing detector that suitably detects unintentional flashing of the LED light engine in a traffic lamp is provided. The LED light engine may flash unintentionally when there are failures (hardware or software) inside a traffic lamp. In certain embodiments, unintentional flashing may be detected using a current sensor. If unintentional flashing is detected, the flashing detector may activate and shut down the LED light engine to remove the hazardous failure and eventually triggers the fuse blowout circuit. Hardware circuitry is suitably employed for both reliability and safety purposes, but software may also be employed.

Abstract: An inductive light-source module including a casing, a substrate, light sources, a circuit board, an infrared sensing device, a bi-incident lens and a control unit is provided. The substrate disposed in the casing includes a carrying surface facing a transparent portion of the casing. The light sources connected to the substrate are disposed on the carrying surface. The infrared sensing device is connected to the circuit board. The bi-incident lens disposed on the transparent portion is located on a light path of each light for scattering visible lights to pass through the transparent portion and transmit to the outside, and converging the infrared from the outside to the infrared sensing device. The control unit is coupled to the light sources and the infrared sensing device to drive the light sources to emit the visible lights according to a sensing signal generated by the infrared sensing device when sensing the infrared.

Abstract: A light emitting diode (LED) lighting system includes a switching power converter having an input for coupling to an alternating current (AC) power source, an output, and a switch. The LED lighting system also includes an LED lighting subsystem coupled to receive power from the output of the switching power converter. The LED lighting subsystem includes a current source for one or more LEDs, and the current source has a control node and a sense node. The LED lighting system additionally includes a switch state controller coupled to the switching power converter and coupled to the LED lighting subsystem. The switch state controller controls switching of the switch and varies a control current provided to the control node of the current source based on at least a parameter sensed from the sense node.

Abstract: A light emitting diode (LED) backlight driving circuit of the present disclosure includes a constant current driver chip, a power module, an LED lightbar coupled to the power module, a dimming module coupled to the LED lightbar, and a low-pass filter. The constant current driver chip comprises a multiplier, and the constant current driver chip generates a gate signal and a dimming signal that are sent to an input end of the multiplier. An output end of the multiplier is coupled to the power module, and is coupled to the dimming module through the low-pass filter.

Abstract: The LED lighting device of the present invention includes: a power supply circuit connected between a light source including a light emitting diode and a power source and including a series circuit of a switching device and an inductor; an inductor current detector configured to provide a measurement value indicative of an inductor current flowing through the inductor; a drive circuit configured to turn on the switching device at a predetermined period and turn off the switching device when the measurement value is equal to a first threshold or more; a load current detector configured to measure a load current flowing through the light source; and a protection device configured to, when the load current measured is equal to a second threshold or more, perform a protection operation of changing, to reduce the load current, a circuit constant of a power supply path in which the load current flows.

Abstract: A method of operating a lighting fixture comprising a plurality of discrete illumination sources of distinguishably different color coordinates comprises determining target color coordinates and luminous flux at which to operate the lighting fixture, determining input electrical power values for each of the plurality of discrete illumination sources that substantially produce the target color coordinates and luminous flux by referencing a calibration data lookup table having calibration data based on measurements of the plurality of discrete illumination sources, determining a color mixing zone defined by three distinguishably different color coordinates of the plurality of discrete illumination sources within which the target color coordinates lie according to the calibration data, determining luminous flux ratios for each of the plurality of discrete illumination sources having one of the three distinguishably different color coordinates defining the color mixing zone that substantially produces the target

Abstract: A method for providing a light output from a lighting system (100) capable of emitting light within a lighting system color gamut (202) in an x-y color plane, comprising the steps of: receiving (302) a light output target comprising a target color point (210, 219) and a target flux; comparing (304) the target color point with the lighting system color gamut (202); and if the target color point is outside of the color gamut: determining (310) a first approximation color point (212, 220) inside the color gamut based on a minimization of a distance in the x-y color plane between the target color point and the first approximation color point; determining (312) a highest possible flux achievable by the lighting system at the first approximation color point; if the highest possible flux achievable by the lighting system at the first approximation color point is equal to or larger than the target flux, control (309) the lighting system to provide light defined by the first approximation color point and the target fl

Abstract: The technology described in this document is embodied in a method that includes processing data in a first dataset that represents time-varying information about at least one pulse pressure wave propagating through blood in a subject acquired at a location of the subject. The method also includes providing information related to the data to a remote device.

Abstract: An LED based light comprises at least one LED; and at least one thermoelectric generator having a first side and a second side, wherein the first side is thermally coupled to the at least one LED such that heat generated by the at least one LED is passively conducted to the at least one thermoelectric generator, producing a temperature differential between the first side and second side, wherein the at least one thermoelectric generator is configured to produce electrical energy from the temperature differential.

Abstract: A method for driving an LED lighting device includes receiving an input voltage from a battery unit and converting the input voltage into a driving current to drive the LED lighting device. The method further includes detecting whether the battery unit is in a low battery state. When the low battery state of the battery unit is detected, the driving current is reduced.

Abstract: One embodiment includes a light-emitting diode (LED) control system. The system includes an LED driver system configured to regulate a control voltage based on a substantially constant reference current and a feedback voltage at a feedback node. The system also includes a digital current source system comprising a plurality of unit current sources that are each coupled to an LED. The plurality of unit current sources can be selectively activated to each provide a given unit current through the LED and to each provide the feedback voltage as an interpolative feedback to the feedback node based on the unit current. The system further includes a current magnitude controller configured to selectively activate the plurality of unit current sources in response to a current magnitude signal.

Abstract: An LED (Light Emitting Device) light source (100), a pulse controller or pulse control module (130) for an LED light source, and a method are provided, for controlling relative timing and phase of LED light pulse generation and operation of peripheral devices, relative to a common timing reference. A system is provided comprising a pulse controller (130) for controlling synchronization of multiple LEDs (144) and/or other devices and peripherals (164), relative to a common timing reference. The pulse controller (130) comprises a processor (131) that programmatically executes a time based sequence of digital control signals (141) from received inputs (121) indicative of a pulse generation sequence.

Abstract: One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operation. A keyboard driver IC can detect the presence or absence of a cable to an LED. If the cable is absent, the driver IC will not supply power for the LED. One embodiment of a keyboard and display backlight control system can be configured to allow substantially independent operation.

Abstract: Right and left lighting devices 3-1 and 3-2 each include an abnormal event informing signal output circuit for outputting an abnormal event informing signal in response to an informing output of the control circuits 6-1 and 6-2. Each abnormal event informing signal output circuit has a circuit configuration that enables the abnormal event informing signal to be supplied to onboard equipment via a signal path common to the two devices.

Abstract: An LED driver circuit includes a first driver, a second driver, a switch, a first detection module, a second detection module and a control module. The first driver provides a first driving current according to a supply voltage. The second driver provides a second driving current according to the supply voltage. The switch is selectively coupled to the first or second driver. An LED emits light according to the first or second driving current. When the switch is coupled to the first driver, the first detection module keeps detecting the first driving current and outputting a first sensing signal. When the switch is coupled to the second driver, the second detection module keeps detecting the second driving current and outputting a second sensing signal. The control module outputs a first or second control signal according to the first or second sensing signal for controlling the switch.

Abstract: A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp having electrodes; a storage unit which stores information with respect to the discharge lamp; and a control unit which controls the discharge lamp driving unit, wherein the control unit is configured to execute a stationary lighting driving in which first drive power is supplied to the discharge lamp and a high-power driving in which second drive power that is higher than the first drive power is supplied to the discharge lamp, and the control unit sets first execution information of the high-power driving on the basis of first information with respect to the high-power driving stored in the storage unit, at a predetermining setting timing, and controls the discharge lamp driving unit according to the first execution information.

Abstract: A lighting device may include a light source, a control circuit, and a communication device positioned in communication with the control circuit. The communication device may be configured to receive a transmission from a user device, and the transmission may include a data structure. The data structure may include a show packet and an event packet. The show packet may include an ID string and information regarding a number of event packets associated with the data structure, and the event packet may include information regarding a lighting spectrum, a fade type, a fade duration, and a hold duration. The control circuit may be configured to operate the light source to emit light transitioning from a present light emission having a present spectral power distribution to a light emission having spectral power distribution indicated by the lighting spectrum according to the fade type and fade duration.

Abstract: Apparatuses, methods and systems for controlling a luminaire are disclosed. One embodiment includes a lighting control sub-system. The lighting control sub-system includes a luminaire, a controller coupled to the luminaire, and a sensor coupled to the controller. The sensor generates a sensed input. The lighting control sub-system further includes a communication interface, wherein the communication interface couples the controller to an external device. The controller is operative to control a light output of the luminaire based at least in part on the sensed input, and to communicate at least one of state or sensed information to the external device.

Abstract: A light-emitting diode (LED) lighting fixture is configured to interface a three-way socket and provide three levels of output light intensity. A detection unit determines whether one or both input voltages lines of the three-way socket are active and provides a control signal to an LED controller indicating which input voltage lines are active. The LED controller is configured to provide different output current levels to an LED bank based on whether one or both input voltage lines are active. By adjusting the output current level based on which input lines are active, the LED lighting fixture provides three output lighting intensity levels. LED lighting fixtures according to various embodiments can therefore serve as a direct replacement for three-way incandescent bulbs.

Abstract: An induction heating system includes an induction heating coil operable to inductively heat a load with a magnetic field, a detector for detecting a current feedback signal corresponding to a current flowing through the induction heating coil, and a controller for detecting a switching transient in the current feedback signal and determining a resonant frequency of the system based on a characteristic of the switching transient.

Abstract: A system wherein a control panel is used to set brightness, select an operation sensor (occupancy or light level), and provide a selection of lights off or reduced light for night conditions. A sensor control mode or a manual control mode may be selected. A sensor module comprises an occupancy sensor and light sensor used to monitor the ambient light at predetermined intervals Absent interrupts from the control panel, the sensor module or the control module, the system is idle. Whenever the system is in an on state, light from light fixtures is adjusted to compliment daylight to produce the user set brightness, thus reducing energy consumption. In an active mode, at least some light remains on, instead of powering off, during periods of system “off”. A delay timer provides time until the light is reduced or turned off entirely.

Abstract: Various apparatuses and methods for starting a thyristor are disclosed herein. For example, some embodiments provide an apparatus for controlling power to a load. The apparatus includes a thyristor, a secondary load switchably connected to an output of the thyristor, and a sensor connected to the secondary load. The sensor is adapted to connect the secondary load to the thyristor when the output of the thyristor falls below a predetermined level.

Abstract: A power supply device includes a first load circuit that operates by a first voltage; a second load circuit that operates by a second voltage higher than the first voltage; a boosting circuit that generates the first voltage if the power supply device is in a first driving mode, and generates the second voltage if the power supply device is in a second driving mode; a first feedback circuit that connects the first load circuit and the boosting circuit if the power supply device is in the first driving mode; and a second feedback circuit that connects the first load circuit and the boosting circuit if the power supply device is in the second driving mode. The first load circuit is operated in the first driving mode. The first load circuit and the second load circuit are operated in the second driving mode.

Abstract: A system and method map dimming levels of a lighting dimmer to light source control signals using a predetermined lighting output function. The dimmer generates a dimmer output signal value. At any particular period of time, the dimmer output signal value represents one of multiple dimming levels. In at least one embodiment, the lighting output function maps the dimmer output signal value to a dimming value different than the dimming level represented by the dimmer output signal value. The lighting output function converts a dimmer output signal values corresponding to measured light levels to perception based light levels. A light source driver operates a light source in accordance with the predetermined lighting output function. The system and method can include a filter to modify at least a set of the dimmer output signal values prior to mapping the dimmer output signal values to a new dimming level.

Abstract: A control circuit for light emitting diode (LED) of display includes a central processing unit (CPU), an AND gate, and a driving circuit. The CPU comprises a general purpose input output (GPIO) contact which outputs an instant high level voltage when a battery is installed into a portable electronic device. The AND gate includes a first input contact connected to the GPIO contact, a second input contact connected to a system power supply, and a first output contact. The system power supply outputs a low level voltage when the electronic device is powered off and outputs a high level voltage when the electronic device is powered on. The driving circuit includes a second output contact connected to an anode of the LED, a feedback contact connected to a cathode of the LED and an enable connected to the first output contact.

Abstract: A dimming circuit and method for a LED provide a first driving voltage or a second driving voltage according to a dimming signal provided by a functional IC to enable or disable the LED. The values of the first and second driving voltages are controlled so that overstressing of the LED is avoided while the functional IC is capable of working even when the LED is off. The LED's life time is thus prolonged.

Abstract: A method for mixing light of LEDs includes following steps: Firstly, a substrate with a red light LED, a green light LED and a blue light LED arranged thereon is provided. Secondly, a power source for supplying power to the red light LED, the green light LED and the blue light LED is provided. Thirdly, a temperature variation ?T1 of the red light LED caused by the power source, a temperature variation ?T2 of the green light LED caused by the power source, a temperature variation ?T3 of the blue light LED caused by the power source are calculated. And finally, input currents applied to the red light LED, the green light LED and the blue light LED are adjusted according to the temperature variations ?T1, ?T2 and ?T3. A lighting device using the method is also provided.

Abstract: This straight tube LED illumination lamp includes the following: an LED element; a first plug having an input-output terminal and an empty terminal; a second plug having an input-output terminal and an empty terminal; a first rectifier that is connected to the input-output terminal of the first plug and the empty terminal of the second plug in order to convert alternating current to direct current; a second rectifier that is connected to the input-output terminal of the second plug and the empty terminal of the first plug in order to convert alternating current to direct current; and a bypass circuit through which current is flown back from either the first or second rectifier to the other rectifier. The bypass circuit has a current-limiting resistor to prevent the first and second rectifiers from being damaged.

Abstract: A system including a selection module to select one of a plurality of templates corresponding to a plurality of light emitting diodes, where the selected template includes one or more of temperature, current, and voltage characteristics of the plurality of light emitting diodes. A control module measures a voltage across one of the plurality of light emitting diodes; determines a temperature of the plurality of light emitting diodes based on the voltage measured across the one of the plurality of light emitting diodes and the selected template; and in order to maintain a luminosity of the plurality of light emitting diodes at a predetermined luminosity, adjusts current through the plurality of light emitting diodes based on the temperature, the selected template, and calibration data. The calibration data include current through the plurality of light emitting diodes and corresponding luminosities of the plurality of light emitting diodes.

Abstract: A bleeder circuit for use in a power converter of a lighting system includes a current sense circuit coupled between first and second terminals of an input of a driver circuit to be coupled to drive a load. The current sense circuit is coupled to output a current sense signal in response to an input current through an input of the power converter coupled to the input of the driver circuit. An edge detection circuit is coupled between the first and second terminals to output an edge detection signal in response to an input signal between the first and second terminals. A variable current circuit is coupled between the first and second terminals to conduct a bleeder current between the first and second terminals in response to current sense signal and further in response to the edge detection signal.

Abstract: The present invention discloses a light emitting device power supply circuit, a light emitting device control circuit and an identifiable light emitting device circuit therefor, and an identification method thereof. The light emitting device control circuit includes an operation signal generation circuit and an identification circuit. The operation signal generation circuit determines whether the light emitting device control circuit operates in an identified mode or amiss mode according to an enable signal. In the identified mode, the light emitting device control circuit operates a power stage circuit to supply an output current to an identifiable light emitting device circuit. In the miss mode, an output voltage is maintained at a predetermined level. The identification circuit determines whether the light emitting device control circuit switches from the miss mode to the identified mode according to whether the output voltage meets a condition.

Abstract: It is provided an LED lighting device calibratable to 0 to 100% of wide range about a chromaticity and luminance of a illumination light by a simple configuration, and a driving method for the LED lighting device. The LED lighting device is provided with a first light-emitting unit and a second light-emitting unit differing a color temperature mutually, and a control circuit for executing a cyclic light/quench control of the first light-emitting unit and the second light-emitting unit, and for executing a light control of the first light-emitting unit and the second light-emitting unit by a PNM (Pulse Number Modulation) control in a fixed cycle so as to have a lighting period Ton for lighting/quenching the first light-emitting unit and the second light-emitting unit complementarily, and a quenching period Toff for quenching both the first light-emitting unit and the second light-emitting unit.

Abstract: A grow system is disclosed herein. The grow system can include a grow device that can include a light system including a plurality of light sources, a light position controller, and a processor. The processor can receive information relating to a plant to be grown by the grow system and can, based on that information, identify an operation program that specifies lighting and positioning of the illumination system. Using the operation program, the processor can generate one or several control signals to control the operation of the light system and the light position system.

Abstract: An LED drive circuit comprises a power supply unit, a first LED lamp string, a first voltage control unit, a second LED lamp string and a first power transfer unit. The power supply unit outputs a drive power to drive the first LED lamp string. The first voltage control unit gets the drive power and stabilizes and provides the voltage to the first LED lamp string. The first voltage control unit includes a power switch where the drive power generates a power loss. The second LED lamp string and first power transfer unit are coupled in series with the first voltage control unit so that the power loss is transferred and output to drive the second LED lamp string. Thus loss of the drive power is reduced and lighting efficiency of the LED improves.

Abstract: A circuit serving as a power source for light-emitting diode (LED) lighting applications, the circuit comprising a boost converter comprising a pair of boost field-effect transistors (FETs) and a boost inductor coupled to the pair of boost FETs, wherein an input voltage feeding the boost converter has a sinusoidal waveform, and wherein a half cycle of the input voltage is represented by a plurality of time slices, and a controller coupled to the boost converter and configured to determine a current time slice in the plurality of time slices, generate one or more output signals based at least in part on the current time slice and without a need to compute any multiplier function involving the input voltage, and control states of the boost FETs using the one or more output signals.

Abstract: Techniques for controlled dimming of an illuminant such as, for example, a light-emitting diode (LED), an organic light-emitting diode (OLED) or gas discharge lamp are described herein. In one example, a control difference formed by subtracting actual values from desired values (dimming values) is smaller than actual values fed back by the lamp. Thus, without directly digitizing an analog feedback variable, the example digitizes a control difference (control deviation) determined in the analog domain, in order to process the latter in a digital control algorithm that determines a digital manipulated variable that influences power to the illuminant.

Abstract: Disclosed is a light source control device including a power conversion unit and a control unit. The power conversion unit includes a transfer capacitor provided between a primary side circuit and a secondary side circuit. The primary side circuit is configured such that a first inductor stores energy when a first switching element is ON. The secondary side circuit is configured such that the second inductor limits a changing speed of the driving current. The power conversion unit is configured such that the driving current is raised when the first switching element is ON. The control unit turns OFF when the magnitude of the driving current exceeds the first threshold value, and turns ON the first switching element when the magnitude of the driving current falls below the second threshold value smaller than the first threshold value.

Abstract: For the purpose of power factor correction of an operating device for a lamp, an inductor (7) is supplied with an input voltage (Vin), a controllable switch element (13) coupled with the inductor (7) being opened or closed to optionally charge or discharge the inductor (7). A control unit (14) for controlling the switch element (13) is designed such that it determines, depending on an output voltage (Vout) of the power factor correction circuit, a switch-on time (Ton) for switching the switch element (13) on and controls the switch element (13) optionally according to at least a first operating mode and a second operating mode, the operation in the first operating mode and the operation in the second operating mode being dependent on the duration of the determined switch-on time (Ton).

Abstract: At least one controllable source of visible light is configured to illuminate a space to be utilized by one or more occupants. A controller causes the source(s) to emit light in a manner that varies at least one characteristic of visible light emitted into the space over a period of time at least in part in accordance with a chaotic function.

Abstract: An adaptive lighting system having a detection unit by which one or more extrinsic variables, that is variables occurring outside the adaptive lighting system, can be detected and can be transmitted, preferably in the form of at least one electric signal, to an evaluation and control unit, to the evaluation and control unit by which a control signal can be generated from the transmitted extrinsic variable(s) and can be transmitted to one or more adaptive light source(s) and to the one or more adaptive light source(s) which is/are designed to vary one or more it its/their emission properties on the basis of the transmitted control signal.

Abstract: In various embodiments, ballast for a discharge lamp includes input and output connections; inverter with bridge circuit with electronic switches and control device for controlling electronic switches, wherein switches are connected in series between input connections, wherein one electronic switch is coupled to first input connection and second electronic switch to second input connection, wherein a bridge midpoint is between electronic switches; including a current measuring device for measuring second electronic switch current; lamp choke series-connected between bridge midpoint and first output connection; capacitor parallel-connected with one of electronic switches; and coupling capacitor; wherein control device is coupled to current measuring device and renders an electronic switch conducting, if negative threshold value is exceeded when electronic switch is rendered nonconducting; or if negative threshold value of current through electronic switch is not exceeded after another electronic switch is rend

Abstract: According to one embodiment, a dimming control system includes a luminaire and a host equipment. The luminaire receives dimming data transmitted using data frames based on a specified communication protocol, and performs dimming control of a lighting load. The host equipment uses the data frames to transmit the dimming data, and uses a part of the data frames to transmit a command to request luminaire information of the luminaire.

Abstract: An LED driving device that performs a dimming operation of an LED module, the device includes: a dimming controller that receives the dimming instruction signal and generates a dimming signal; and a driving circuit that supplies an output current to the LED module based on the dimming signal generated by the dimming controller, wherein the driving circuit unit includes: a converter controller that generates a drive signal based on the dimming signal and outputs the drive signal to a first switching element; a first current setting circuit; and a second current setting circuit that is connected in parallel to the first current setting circuit, and wherein the dimming controller controls an operating state of the second current setting circuit to switch an adjustment range of the output current and a change characteristic of the output current in response to the dimming signal.

Abstract: A drive voltage generation circuit for an LED display device capable of increasing the input voltage range thereof is disclosed. The drive voltage generation circuit includes a booster that boosts an input voltage from an external source, to generate a boosted voltage, a protection switching element that controls whether or not the boosted voltage generated from the booster is to be output, in accordance with a switch control signal, a protection circuit that compares a level of the boosted voltage output from the booster via the protection switching element with a predetermined threshold voltage, selects one of a high voltage and a low voltage, based on a result of the comparison, and outputs the selected voltage as the switch control signal, and a discharger that discharges a low voltage node, to which the low voltage is applied.

Abstract: In various embodiments, an illumination system includes multiple light-emitting strings that are selectively activated or deactivated to regulate an overall output of the array.

Abstract: A projector includes: a discharge lamp; a discharge lamp driving unit that drives the discharge lamp by supplying a driving power to the discharge lamp through supply of a driving current thereto; and a control unit that controls the discharge lamp driving unit based on plural operating modes in which maximum values of the driving power are different from one another, wherein the control unit switches the operating mode through a transition period and controls the discharge lamp driving unit so that an average value of a frequency of the driving current in the former half of the transition period becomes larger than an average value of a frequency of the driving current in the latter half of the transition period.

Abstract: A system and method for controlling the dimming of a lighting element, or other electrical load, that uses a timer synchronized to the AC waveform is disclosed. The timer is set up to repeatedly count at a rate equal to twice the frequency of the AC waveform. An output from the timer logic is asserted when the timer value exceeds a predetermined value, stored in a compare register. This output is connected to the gate of a triac, which controls the passage of current from the AC power source to the electrical load. A capture register is used to determine the temporal relationship between the restart of the timer and the AC waveform. This system and method reduces the real time requirements of an associated processing unit, and improves consistency, thereby reducing flicker.

Abstract: A LED driving apparatus includes: an output transistor, having a drain coupled to the LED; a node, coupled to a source of the output transistor; a ground transistor, having a drain coupled to the node, and a source coupled to the ground; an operational amplifier, including: a first input end and a second input end, for respectively receiving a driving signal and a feedback signal; and an output end, for outputting an output signal to a gate of the output transistor; a compensating capacitor, including a first end and a second end; and a switching unit, for switching between a first connection mode and a second connection mode, so as to offset a bias difference to the node for compensating the bias difference of the operational amplifier.

Abstract: A method of driving LED chips of same power but different rated voltages and currents includes the following steps: set a predetermined power; provide a LED chip which has a rated power accordant to the predetermined power; measure the LED chip to obtain a working current thereof while the LED chip is operated; provides a driving current to the LED chip, and maintain the driving current the same as the working current.

Abstract: The invention relates to a detector circuit comprising a connection for a voltage supply (Vbat) and a connection for connecting a lamp (LED), said connection being connected to the connection for a voltage supply (Vbat) and to a first control component (I2C) of a first interface protocol and a second control component (PWM) of a second interface protocol. The detector circuit further comprises a first input node (In1) and a second input node (In2), wherein the first control component (I2C) is connected to the first input node (In1) and the second input node (In2) and the second control component (PWM) is connected to the second input node (In2). A detector (det) for ascertaining an interface standard is coupled to the connection for a voltage supply (Vbat) and the first input node (In1) on one side and to ground (GND) on the other side.