Datasheet

LT3598
17
3598fb
TYPICAL APPLICATIONS
LED Driver for 30 White LEDs with 60mA Each String
L1
10μH
D1
C2
4.7μF
3598 TA03a
LT3598
V
O_SW
FB
OPENLED
PWM
SHDN
SYNC
LED1
LED2
LED3
LED4
LED5
LED6
V
OUT
SWV
IN
R4
1.00M
R5
30.9k
PWM
SHDN
SYNC
CTRL
CTRL
R6
100k
C1
2.2μF
PV
IN
6V TO 40V
C3
2.2μF
V
IN
5V
R3
9.76k
R7
100k
C1: TAIYO YUDEN GMK325BJ225ML
C2: MURATA GRM32ER71H475KA88L
C3: TAIYO YUDEN LMK212BJ225MG
D1: VISHAY SS3H9
L1: W
ÜRTH ELEKTRONIK 744777410
R
NTC
: MURATA NCP18WF104J03RB
R
HOT
10k
RT
CTRL
V
REF
V
C
SS GND
T
SET
I
SET
C4
0.1μF
C5
47pF
R1
51.1k
60mA
R
NTC
100k
R
C
2.61k
C
C
15nF
R8
60.4k
Effi ciency (PWM Dimming)
Dimming Range (1000:1 PWM) at 125°C
Junction Temperature, 10ms Period
TOTAL LED CURRENT (mA)
0
EFFICIENCY (%)
80
85
90
140
75
70
40 80
20 180
60 100
160
120
65
60
100
95
3598 TA03b
PV
IN
= 25V
PV
IN
= 12V
2μs/DIV
PWM
5V/DIV
SW
20V/DIV
I
LED1
100mA/DIV
359
8