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LT3598
TYPICAL APPLICATIONS
LED Driver for 40 White LEDs with Two Channels Unused
L1
PV IN
6V TO 40V
10μH
D1
C1
2.2μF
V IN
5V
C3
2.2μF
R6
100k
V IN
OPENLED
SW
V OUT
V O_SW
R4
1.00M
C2
4.7μF
SHDN
PWM
SYNC
SHDN
PWM
SYNC
RT
LT3598
FB
R5
30.9k
R1
51.1k
V REF
R HOT
10k
CTRL
LED1
LED2
LED3
20mA
47pF
R8
60.4k
R NTC
100k
R7
100k
T SET I SET
C5
R3
14.7k
SS
LED4
LED5
LED6
GND V C
C4
0.1μF
R C
2.61k
C C
15nF
3598 TA02a
C1: TAIYO YUDEN GMK325BJ225ML
C2: MURATA GRM32ER71H475K
C3: TAIYO YUDEN LMK212BJ225MG
D1: DIODES, INC. B240A
L1: WüRTH ELEKTRONIK 744777410
R NTC : MURATA NCP18WF104J03RB
Ef?ciency (PWM Dimming)
95
90
85
80
75
70
65
60
55
50
PV IN = 25V
PV IN = 12V
0
10
20
30
40
50
60
70
80
90
TOTAL LED CURRENT (mA)
3598 TA02b
3598fb
16
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