Datasheet

20 25 30 35 40 45 50 55 60
-3
-2
-1
0
1
2
3
FREQUENCY DEVIATION (%)
V
IN
(V)
T
J
=25°C
T
J
=-40°C
T
J
=125°C
-50 -25 0 25 50 75 100 125
-3
-2
-1
0
1
2
3
I
LED
REGULATION (%)
TEMPERATURE (°C)
V
IN
=36V(6LED)
V
IN
=48V(8LED)
V
IN
=60V(11LED)
0 10 20 30 40 50 60 70 80 90 100
0
10
20
30
40
50
60
70
80
90
100
I
LED
(%)
DIM DUTY RATIO (%)
V
IN
=36V(6LED)
V
IN
=48V(8LED)
V
IN
=60V(11LED)
0.0 0.2 0.4 0.6 0.8 1.0
0.0
0.2
0.4
0.6
0.8
1.0
I
LED
(%)
DIM DUTY RATIO (%)
V
IN
=36V(6LED)
V
IN
=48V(8LED)
V
IN
=60V(11LED)
0 10 20 30 40 50 60
0
200
400
600
800
1000
I
LED
(mA)
V
IN
(V)
T
J
=-40°C
T
J
=125°C
T
J
=25°C
0 10 20 30 40 50 60
0
20
40
60
80
100
I
IN
(mA)
V
IN
(V)
T
J
=25°C
T
J
=-40°C
T
J
=125°C
TPS92551, TPS92551EVM
www.ti.com SNVS805C –MAY 2012–REVISED MAY 2013
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
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.
I
LED
vs V
IN
I
IN
vs V
IN
V
LED
= 0V, DIM = open V
LED
= 0V, DIM = open
Figure 24. Figure 25.
I
LED
vs Dimming Duty Ratio I
LED
vs Dimming Duty Ratio
Figure 26. Figure 27.
Frequency Deviation vs V
IN
(800kHz) I
LED
Regulation vs Temperature
Figure 28. Figure 29.
Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Links: TPS92551 TPS92551EVM