Datasheet

0 10 20 30 40
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
V
IN
(V)
1LED
2LED
3LED
4LED
0 10 20 30 40
-3
-2
-1
0
1
2
3
I
LED
REGULATION (%)
V
IN
(V)
1LED
2LED
3LED
4LED
25 30 35 40 45 50 55 60
75
80
85
90
95
100
EFFICIENCY (%)
V
IN
(V)
6LED
10LED
14LED
16LED
25 30 35 40 45 50 55 60
-3
-2
-1
0
1
2
3
I
LED
REGULATION (%)
V
IN
(V)
6LED
10LED
14LED
16LED
0 10 20 30 40
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
V
IN
(V)
1LED
2LED
3LED
4LED
0 10 20 30 40
-3
-2
-1
0
1
2
3
I
LED
REGULATION (%)
V
IN
(V)
1LED
2LED
3LED
4LED
TPS92551, TPS92551EVM
SNVS805C –MAY 2012–REVISED MAY 2013 www.ti.com
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified, the following conditions apply: V
IN
= 48V, C
IN
is a 2.2µF 100V X7R ceramic capacitor for driving
5–13 power LEDs with I
LED
= 350mA. Single LED forward voltage used is 3.2V. T
A
= 25°C for efficiency curves and
waveforms.
Efficiency vs V
IN
, I
LED
= 350mA I
LED
Regulation vs V
IN
, I
LED
= 350mA
Figure 6. Figure 7.
Efficiency vs V
IN
, I
LED
= 350mA I
LED
Regulation vs V
IN
, I
LED
= 350mA
Figure 8. Figure 9.
Efficiency vs V
IN
, I
LED
= 450mA I
LED
Regulation vs V
IN
, I
LED
= 450mA
Figure 10. Figure 11.
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