Datasheet

LT3598
18
3598fb
TYPICAL APPLICATIONS
Auto Battery Powered Driver for 20 LEDs with 90mA Each String
Effi ciency
L1
4.7μH
C2
4.7μF
3598 TA04a
LT3598
V
O_SW
FB
OPENLED
RT
LED1
LED2
LED3
LED4
LED5
LED6
V
OUT
SWV
IN
R10
20k
CTRL
V
REF
PWM
SHDN
SYNC
PWM
SHDN
CTRL
CTRL
100k
PV
IN
6V TO 40V
C3
2.2μF
V
IN
5V
D1
R4
1.00M
R5
30.9k
C1
2.2μF
R3
9.76k
C1: NIPPON CHEMI-CON KTS500B225M32NOTOO
C2: MURATA GRM32ER71H475KA88L
C3: TAIYO YUDEN LMK212BJ225MG
D1: VISHAY SS3H9
L1: W
ÜRTH ELEKTRONIK 7447785004
V
C
SS GND
T
SET
I
SET
C4
0.1μF
C5
56pF
R1
51.1k
90mA
R7
100k
R
C
5.11k
C
C
6.8nF
R8
60.4k
Dimming Range 1000:1 PWM,
10ms Period (125°C Junction Temperature)
TOTAL LED CURRENT (mA)
0
EFFICIENCY (%)
80
85
90
140
75
70
40 80
20 180
60 100
160
120
65
60
95
3598 TA04b
5μs/DIV
PWM
5V/DIV
I
LED1
100mA/DIV
3598 TA04c