Datasheet

LT3496
13
3496ff
typical applications
Minimum BOM Buck Mode LED Driver
300:1 PWM Dimming at 120Hz Efficiency
0.3A
C4
0.22µF
C5
0.22µF
C6
0.22µF
LED1
330mΩ 330mΩ
PV
IN
42V
7 LEDs
L1
15µH
L2
15µH
L3
15µH
CAP1
0.3A
LED2
CAP2
0.3A
LED3
C1-C3
1µF
s3
330mΩ
22k
470pF
3496 TA07a
CAP3
SW1
D1 D2 D3
OPEN
SW2
LT3496
GND
SW3
TG1, TG2, TG3
VC1, VC2, VC3
V
REF
CTRL1, CTRL2, CTRL3
f
ADJ
OVP1, OVP2, OVP3
CAP1, CAP2, CAP3
LED1, LED2, LED3
V
IN
PWM1, PWM2, PWM3
SHDN
PWM1, PWM2, PWM3
SHDN
V
IN
3V
C7
1µF
C1-C3, C7: MURATA GRM31MR71H105KA88
C4-C6: MURATA GRM21BR71H224KA01
D1-D3: DIODES DFLS160
L1-L3: TAIYO YUDEN NP04SZB 150M
PWM
5V/DIV
I
L
0.5A/DIV
I
LED
0.5A/DIV
5µs/DIV
3496 TA07b
I
LED
(mA)
0
75
EFFICIENCY (%)
80
85
90
95
100
50
100 150 200
3496 TA07c
250 300
PWM = 3V
CTRL = 0V TO 1.2V