Datasheet

1 3 4 5 6 2 7
EP
LED+ LED+
DIM
GND
VREF
IADJ
LED-
V
IN
High Power LED String
I
LED
I
IN
TPS92551
C
IN
25 30 35 40 45 50 55 60
75
80
85
90
95
100
EFFICIENCY (%)
V
IN
(V)
6LED
10LED
14LED
16LED
4 s/DIV
V
DIM
(2V/DIV)
I
LED
(200mA/DIV)
TPS92551, TPS92551EVM
SNVS805C –MAY 2012–REVISED MAY 2013 www.ti.com
System Performance
Figure 2. Efficiency vs V
IN
, I
LED
= Figure 3. Radiated Emissions (EN Figure 4. LED Current with PWM
350mA 55015) Dimming
16µs dimming pulse
TYPICAL APPLICATION CIRCUIT
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