Datasheet

0 4 8 12 16 20 24 28 32 36
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
V
IN
(V)
1LED
2LED
3LED
4LED
0 4 8 12 16 20 24 28 32 36
-3
-2
-1
0
1
2
3
I
LED
REGULATION (%)
V
IN
(V)
1LED
2LED
3LED
4LED
0 4 8 12 16 20 24 28 32 36
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
V
IN
(V)
1LED
2LED
3LED
4LED
20 24 28 32 36
80
85
90
95
100
EFFICIENCY (%)
V
IN
(V)
6LED
8LED
10LED
www.ti.com Typical Performance Characteristics
6 Typical Performance Characteristics
Unless otherwise specified, the following conditions apply: V
IN
= 24V, C
IN
is a 2.2µF 100V X7R ceramic
capacitor for driving 2–7 power LEDs with I
LED
= 350mA. Single LED forward voltage used is 3.2V. T
A
=
25°C for efficiency curves and waveforms.
Figure 5. Efficiency vs. V
IN
, Figure 6. Efficiency vs. V
IN
,
I
LED
= 350mA I
LED
= 350mA
Figure 7. Efficiency vs. V
IN
, Figure 8. I
LED
Regulation vs. V
IN
,
I
LED
= 450mA I
LED
= 350mA
5
SNVA640A–May 2012–Revised May 2013 AN-2208 TPS92550 450mA 36V LED Driver Micro-Module Evaluation Board
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