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