OSRAM OPTOTRONIC Constant current LED power supplies with 3DIM - Manual (Page 40)

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3.3.2.4. Application solution 4 –
LEDset and current set combination: direct NTC connection
As described in chapter 3.2.2.3. General notes on local dimming: LEDset,
“current set” combination, there are ECGs which can combine the LEDset inter-
face characteristic with the optional current set confi guration. ECGs with this kind
of combination offer another very simple and economical application: the direct
connection of an NTC. Additional resistors named Rs and Rp can be used to fi ne-
tune the Tset
TH
and the linearization of the characteristic above the Tset
TH
.
LEDset APPLICATIONS
Figure 39: Thermal derating – direct NTC connection. Figure 40: Direct NTC connection – output characteristic.