OPTOTRONIC Intelligent Ultraflat

Product family features
  • Line frequency: 0 Hz | 50 Hz | 60 Hz
  • Versatile DALI window driver up to 75 W due to flexible output characteristic
  • Supply voltage: 220…240 V
  • Available with output current range: up to 700 mA
  • Direct Ultraflat sensor connection via LEDset (LS/PD LT2 LI UF Sensor)
  • Use with Ultraflat DALI sensor (LS/PD DALI LI UF Sensor)
  • Constant Lumen Output (CLO)
  • Non-isolated drivers
  • DALI-2 certified (Part -101,-102 and -207)
Product family benefits
  • Ultra-flat housing (11 mm height) for innovative luminaire designs and applications
  • LEDset interface for direct Ultraflat sensor connection (LS/PD LT2 LI UF sensor)
  • Fully programmable via T4T software (NFC, DALI Interface)
  • Lifetime: up to 100,000 h (temperature at Tc = 65 °C, max. 10 % failure rate)
  • High-quality dimming of 1…100 % by amplitude dimming
  • High quality of light thanks to <1% output ripple current
  • Very high efficiency
  • Fulfill safety requirement due to overload, overtemperature, Hot Plug protection
Versatile scope of application due to OSRAM DALI Technology:
  • Easy to use in corridors and restrooms because of three-level Corridor function
  • Touch DIM application: easy to control via pushbutton or sensor
  • Energy efficient Touch DIM operation due to automatic switch-off at sufficient residual light
  • Suitable for emergency Installations (acc. to EN 60598-2-22 and IEC 61347-2-13, appendix J) thanks to DC detection (0 Hz, pulsating DC), on/off switchable
  • Feedback of power consumption and operating hours (Fit for SMART GRID)
  • Suitable for buildings according to EPBD/BREEAM/LEED due to automatic Constant Lumen Output setting
  • Luminaire information for easy maintenance


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Nominal output voltage
Nominal output current
Data sheet
OTi DALI 35/220…240/400 D LT2 UF L
54…240 V 75…400 mA 360.0 mm 30.0 mm 11.0 mm
OTi DALI 75/220…240/700 D LT2 UF L
54…240 V 150…700 mA 360.0 mm 30.0 mm 11.0 mm



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Information about Family

Now you can have high quality, reliable and versatile lighting wherever you need it. A super slim (11 mm height) profile and flicker-free light make this LED driver ideal for modern, creative and innovative designs. Fast and easy to program in floor-standing, pendant and surface-mounted luminaires and panels, when used as a system solution with other elements from the Ultraflat range it lets you bring your most creative lighting designs to fruition — quickly, easily and without fuss. What is more, you can now create precisely the lighting solution your project needs without having to find a compromise between design and efficiency. The intelligent features of this driver, which include fit for SMART GRID, fit for emergency, corridor and Touch DIM capabilities, make it versatile and easy to manage, while its compatibility with several programming interfaces (DALI lighting, LEDset2, NFC) ensure flexibility. In short, the OPTOTRONIC Intelligent UltraFlat Dimmable DALI may be half the height of a standard OTi DALI, but its optimized performance and functionality, and ease of integration with other elements from the Ultraflat range, means that it can provide just about any feature that modern lighting manufacturers, designers and planners can think of.
Areas of application
  • Linear lighting for office, education, industry, storage areas and retail
  • Installation in emergency lighting systems according to IEC 61347-2-13, appendix J
  • Suitable for luminaires of protection class I