Datasheet

28 V
I = 0 mA
IN
Device
EN
OUT
FB
C
OUT
R
SET
GND
Low
100 V
28 V
TPS7A42
www.ti.com SBVS184 –DECEMBER 2011
Whenever the regulator is disabled, no current flows through the LED array. This condition means that the
regulator has the same high voltage applied to the first LED in the array as is applied to the regulator input.
Figure 14 illustrates the solution to this problem with the addition of the TPS7A4201 high-voltage regulator.
Figure 14. LED Array Driver with Regulator Disabled
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