QUICK START GUIDE FOR DEMONSTRATION CIRCUIT
1268A-A, 1268A-B
HIGH VOLTAGE LED CONTROLLER
6
80%
82%
84%
86%
88%
90%
92%
94%
96%
98%
100%
5
10
15
20
25
30
35
40
INPUT VOLTAGE (V)
E
F
F
IC
IE
N
C
Y
(
%
)
Figure 3. DC1268A-A/B Efficiency with 50V LEDs at 1A
0.0
0.2
0.4
0.6
0.8
1.0
1.2
5
10
15
20
25
30
35
40
INPUT VOLTAGE (V)
L
E
D
C
U
R
R
E
N
T
(
A
)
Figure 4. DC1268A-A/B LED Current Drops at Low VIN (CTRL) and Turns Off at Lower VIN (UVLO)
