Datasheet

LTC3530
14
3530fb
LED CURRENT (A)
0.1
EFFICIENCY (%)
0.5
3530 TA04b
80
84
88
92
96
82
86
90
94
98
100
V
IN
= 3.6V
1MHz
High Effi ciency Li-Ion Powered Constant Current Lumiled Driver
SW1
V
IN
SD/SS
R
T
SW2
V
OUT
FB
V
C
BURST
LTC3530
V
IN
2.2V TO
4.2V
LHXL-PW01
C
OUT
4.7μF
C
P1
1nF
3530 TA04a
L1
3.3μH
C
BURST
470pF
C
IN
10μF
OFF ON
R2 = R1/1.5
I
LED
=
C
IN
= TAIYO YUDEN JMK212BJ106MG
C
OUT
= TAIYO YUDEN JMK325BJ475MM
D1 = BAT54
12,810 (R1+R2+R3+R4)
R1 • R3
R3
95.3k
R2
100k
R1
301k
R
T
44.2k
R4
100k
I
LED
= 500mA
GND
D1
Lumiled Driver Effi ciency vs LED Current
TYPICAL APPLICATIONS