OSRAM OPTOTRONIC Constant current LED power supplies with 3DIM - Manual (Page 20)

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LEDset APPLICATIONS
3.2.2.3. General notes on local dimming:
LEDset, “current set” combination
For some applications, the turn-off capability provided by
the LEDset characteristic above 11 V might not be an
appro priate feature.
Therefore, some LEDset ECGs can combine the LEDset
interface with the so-called “current set” (CS) feature.
Product examples are the OT 35/220-240/700 LTCS and
OT 45/220-240/700 LTCS (LTCS means “LEDset” (LT)
and “current set” (CS)).
On those devices, it is possible to set the current control
functionality by dip switch to work with a “pure” LEDset
interface as described in chapter 2, or to combine it with a
current set (CS) confi guration: 350, 500 and 700 mA where
the maximum nominal currents (Inom
max
) can be selected.
The Vset signal can still be used to control/set the output
current of the ECG as in a “pure” LEDset control –
with the difference being only in regards to the Vset charac-
teristic above 11 V.
A typical characteristic of this confi guration is shown in
fi gure 11.