Datasheet

0 100 200 300 400 500
300
310
320
330
340
350
I
LED
(mA)
R
IADJ
()
0 20 40 60 80 100
350
375
400
425
450
I
LED
(mA)
R
VREF
(k)
TPS92551, TPS92551EVM
SNVS805C –MAY 2012–REVISED MAY 2013 www.ti.com
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 R
IADJ
I
LED
vs R
VREF
R
VREF
= open R
IADJ
=0Ω
Figure 30. Figure 31.
10 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: TPS92551 TPS92551EVM