Osram OPTOTRONIC Constant current LED power supplies wit Manuel d'utilisateur

www.osram.com/ledsetApplication guide.The LEDset interface.

10LEDset SPECIFICATIONS2.3.5. Color coding2.3.7. Fault conditions/troubleshooting2.3.6. Cable length2.3.7.1. Incorrect wiring 2.3.7.2. Missing control

11LEDset SPECIFICATIONS2.3.8. Connection of multiple ECGsDepending on the LEDset control gear, the Vset signals can be connected in parallel to set th

12LEDset APPLICATIONS3.1. Current setting3. LEDset applications3.1.1. Setting by external resistorIf the application requires a specifi c fi xed output

13LEDset APPLICATIONSThe following table shows the output current values obtained by applying a 1 % resistor (from E96 series unless otherwise specifi

14Vset Rset IsetLEDset APPLICATIONSNote 1: The E96 series covers a wide range of values. The table contains only some sample values of this

15LEDset APPLICATIONS3.1.2. Step dimming (StepDIM)Based on the previous chapter (3.1.1.), the current settingby resistor can be easily extended by an

16LEDset APPLICATIONS Control lineSupplier230 VACLow voltageOMRONG2R1Z230VACG2R1AP3230VACG5V1 series (one contact pole)G6S series (golden-plated –

17LEDset APPLICATIONS3.2. Local dimming 3.2.1. Potentiometer applicationIf an application requires the dimmability of a luminaire, a sim-ple and econo

183.2.2. Light sensor application3.2.2.1. Using OSRAM DIM MICO/PICODaylight compensation can be easily obtained with theLEDset interface by connecting

193.2.2.2. Using customized sensorsVarious light sensors can be used in place of the previously mentioned OSRAM DIM MICO/PICO. Once the outputsensor i

2CONTENTSGeneral notes:As the specifi cations of the applied components are subject to change, OSRAM does not take liability for the technical accuracy

20LEDset APPLICATIONS3.2.2.3. General notes on local dimming:LEDset, “current set” combinationFor some applications, the turn-off capability provided

21LEDset APPLICATIONSAbove 10 V and higher, the output current is maintained atits maximum nominal value without turning off the ECG. Inthis case, the

22LEDset APPLICATIONSThe LEDset interface allows users to strategically defi ne their module temperature management, thus providing the possi-bility to

Application solutions ComplexitylevelFor detailed information,please see chapters:Low3.3.1. Overtemperature protection3.3.1.1. Application solution 1

243.3.1. Overtemperature protection3.3.1.1. Application solution 1 – TMP300 solutionA possible approach for overtemperature protection is to simply us

25The schematic of the circuit is shown in fi gure 13. Properby-pass capacitors (100 nF 25V X7R SMD type) should be added on the supply line and Rtemp

263.3.1.2. Application solution 2 – LM26 solutionLM26 (National Semiconductor) is a digital output tempera-ture switch IC with a factory-programmed tr

273.3.1.3. Application solution 3 – NPC SM6611 solutionSM6611 (NCP) is a temperature switch IC able to change the state of an output pin (invert) when

283.3.1.4. Application solution 4 – SI S-5841 solutionThe SI S-5841 (SI – Seiko Instruments Inc.) series is a tem-perature switch IC which detects a c

293.3.1.5. Application solution 5 – MM3488 solutionThe MM3488 (MITSuMI) is a temperature switch IC that changes the IC output level from “low” to “hig

3CONTENTS1. Introduction 4 1.1. Features and benefi ts 52. LEDset specifi cations 6 2.1. General overview 6 2.2. LEDset characteristic 7 2.2

303.3.1.6. Application solution 6 – TC620(1) solutionThe TC620 and TC621 (from Microchip) are programmable logic output temperature detectors designed

31LEDset APPLICATIONSFigure 23: TC620 solution – output characteristic. Figure 24: TC620 solution – RTRIP vs. temperature.Example:Conditions:TsetH = 8

32Note: For a precise calculation, the VCEsat of Q2 should also be considered. For aBC847 transistor, the voltage drop is in the range between 40 and

33Figure 26: Two-step solution without switch-off.3.3.1.7. General notes on IC temperature switches: choice and usage• For all the above application s

343.3.2. Overtemperature protection (discrete NTC)3.3.2.1. Application solution 1 –overtemperature protection by comparatorThe application solutions a

35The circuit confi guration allows setting a hysteresis bet ween on and off state, thus avoiding spurious and unwanted light fl ickering/toggling: focu

363.3.2.2. Application solution 2 –overtemperature management by comparator: two-step outputThe following application is basically similar to the one

37Example:Requirements:TsetH = 70 °CTsetL = 55 °CΔTHyst = 5 °CIout = InommaxIoutwarning = 60 % Inommax Ioutfault= 0 mALEDset APPLICATIONSFigure 33: Th

383.3.2.3. Application solution 3 –overtemperature management: continuous derating and switch-offThe following application shows a cost-effi cient solu

39Example:Requirements:TsetH = 75 °CTsetL = 60 °CΔTHyst = 5 °CIout = InommaxIoutwarning = from 100 % to 60 % Inommax in a linear way Ioutfault= 0 mALE

4INTRODUCTIONLED technology is changing the world of general lighting. In luminaire design, however, the various benefi ts of LEDs, e.g. their high lev

403.3.2.4. Application solution 4 –LEDset and current set combination: direct NTC connectionAs described in chapter 3.2.2.3. General notes on local di

41For this kind of application, the choice of the NTC is funda-mental to meet the requirements in terms of the TsetTH(temperature from which to start

423.3.2.5. Application solution 5 – overtemperature management: microcontroller (MCU) approachSince the cost of small 8-bit microcontrollers has dropp

43Note:The DAC interface can be implemented in various ways. The only thing to take into account is that the DAC circuit must be able to sink the Iset

44LEDset APPLICATIONSUsing two lookup tables – one for the temperature and one for the Vset – allows the designer to be very fl exible:• The NTC can be

45LEDset APPLICATIONSThe MCU approach can be a bit more expensive and may require more design development skills (need of HW andSW development) compar

46LEDset APPLICATIONS3.4. +12Vset auxiliary supply3.4.1. Aesthetic useThe LEDset interface provides a +12Vset supply voltage that can be used in diffe

47LEDset APPLICATIONS3.4.2. Active coolingFuture generations of the LEDset interface might have a higher power capability via the +12Vset auxiliary su

48LEDset APPLICATIONS3.5. Constant lumen outputThe application example in chapter 3.3.2.5. Applicationsolution 4 – overtemperature management: microco

49LEDset APPLICATIONS3.6. Combination of featuresWith LEDset, some LED control features can be combined with one single interface. Figure 51 gives an

5INTRODUCTIONLEDset helps you to meet important market requirements:• Future-proof solutions in terms of lumen output• Long-life operation• Customizat

www.osram.com/ledset09/11 OSRAM CRM MK AB OSRAM does not accept liability for errors, changes and omissions.Global presence.OSRAM supplies customers

6LEDset SPECIFICATIONS2.1. General overviewLEDset is a 3-wire analog control interface designed forOPTOTRONIC® constant-current LED power supplies. It

7LEDset SPECIFICATIONS2.2. LEDset characteristic2.2.1. General descriptionWith the LEDset interface, the output current can be defi ned relative to the

8LEDset SPECIFICATIONS2.2.2. Implementation in the OSRAM ECGBased on the general LEDset specifi cation, two different LEDset implementations can curren

9LEDset SPECIFICATIONS2.3. Technical details2.3.4. Insulation2.3.1. Bias current (Iset)2.3.2. +12Vset2.3.3. Fault protectionThis chapter gives a gener