TPS61196
SLVSBG1C –OCTOBER 2012–REVISED FEBRUARY 2013
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LED OPEN PROTECTION (1% DIMMING)
LED OPEN PROTECTION (100% DIMMING)
Fault
Fault
5 V/div
5 V/div
IFB1
IFB1
10 V/div
10 V/div
V
V
OUT
OUT
20 V/div
20 V/div
ILED
ILED
100 mA/div
100 mA/div
10 ms/div
10 ms/div
G014
G015
Figure 16.
Figure 17.
LED SHORT PROTECTION (1% DIMMING)
LED SHORT PROTECTION (100% DIMMING)
Fault
5 V/div
Fault
5 V/div
IFB1
10 V/div
IFB1
10 V/div
V
V
OUT
OUT
20 V/div
20 V/div
ILED
100 mA/div
ILED
100 mA/div
100 µs/div
2 ms/div
G017
G016
Figure 18.
Figure 19.
IFB SHORT TO GROUND PROTECTION (1% DIMMING)
Fault
IFB SHORT TO GROUND PROTECTION (100% DIMMING)
Fault
5 V/div
5 V/div
IFB1
IFB1
500 mV/div
10 V/div
V
V
OUT
OUT
20 V/div
20 V/div
ILED
ILED
100 mA/div
100 mA/div
20 ms/div
20 ms/div
G018
G019
Figure 20.
Figure 21.
10
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