Download design-in guide - Philips

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LED Driver
RC filter for Touch & Dim interfaces
When a Touch & Dim interface is used that works with the mains voltage
(Touch & Dim can work with several voltages) and in combination with long
cable lengths, big voltage peaks might occur. These voltage peaks can have an
unwanted effect on the performance of some of the Xitanium LED drivers.
To prevent this, Philips strongly advises to add a simple RC (using a positive
temperature coefficient thermistor) filter in the system for every Touch & Dim
interface that is used for the selected drivers listed below.
LED Driver
Circuit diagram of a Touch & Dim system with RC
filter
The picture on the left shows the diagram of a Touch & Dim controlled system
with the extra RC-filter. The RC filter consists of following components:
• PTC Resistor: R = 80-150 Ohm Max Voltage Rating>250V
• Capacitor: C = 330 nF Type X2 275V
The following drivers need an RC filter for the Touch & Dim interfaces:
Driver
12nc Code
Xitanium 50W 0.3-1A 62V TD/TE 230V 9290 006 61203
Xitanium 50W SH 0.3-1A 62V TD/TE/I 230V 9290 006 17203
Xitanium 50W LH 0.3-1A 62V TD/TE/I 230V 9290 006 17103
Xitanium 25W 0.3-1A 36V TD/Is 230V 9290 004 85803
Xitanium 25W 0.3-1A 36V TD/I 230V 9290 006 00403
Fortimo LED driver 1100-3000 TD 9290 004 65003
Fortimo LED driver 1100-3000 TD/I 9290 004 65203
Design-in guide Philips Xitanium indoor down and spotlight Fortimo LED drivers
page 18