Datasheet

LT3599
18
3599fe
TOTAL LED CURRENT (mA)
40
60
EFFICIENCY (%)
65
75
80
85
100
95
120
200
240
70
90
80
160
280
320
3599 TA02b
PV
IN
= 24V
PV
IN
= 12V
TYPICAL APPLICATIONS
12W LED Driver
1MHz Boost, 80mA per String, 10 LEDs per String
Effi ciency
PWM Dimming Range 1000:1
(10ms Period)
10μs/DIV
PWM
5V/DIV
I
LED
TOTAL
200mA/DIV
3599 TA02c
R
C
10k
C1
3.3μF
25V
C4
47nF
C1: MURATA GRM21BR71E335K
C2: MURATA GRM31CR71H475K
D1: DIODES INC. DFLS240
D2, D3, D4, D5: DIODES INC. 1N4148WS
(SEE SHORTLED FLAG IN APPLICATIONS
INFORMATION SECTION)
L1: VISHAY IHLP2020BZER100M01
L1
10μH
C2
4.7μF
50V
s2
100pF
D2
D3
D4
D5
C
C
2.2nF
3599 TA02a
LT3599
V
O_SW
FB
OPENLED
SHORTLED
PWM
SHDN/UVLO
RT
SYNC
PWM
80mA PER STRING
CTRL
V
REF
T
SET
LED1
LED2
LED3
LED4
V
OUT
SW
D1
V
IN
V
C
SS GND
I
SET
R10
1M
R11
31.6k
V
IN
V
IN
3.1V TO 5.5V
V
IN
R9
16.5k
R6
53.6k
R5
100k
DISABLE4
R4
100k
R2
31.6k
R3
33.2k
R7
53.6k
R8
80.6k
R1
200k
PV
IN
8V TO 24V
C3
1μF
6.3V