LT3492
TYPICAL APPLICATIONS
Minimum BOM Buck Mode LED Driver
PV IN
58V
10 LEDs
I SP1
330mΩ
I SN1
0.3A
C4
C5
I SP2
330mΩ
I SN2
0.3A
ISP3
330mΩ
ISN3
0.3A
C6
C1-C3
1μF
3
0.22μF 0.22μF
0.22μF
L1
L2
L3
33μH
SW1
D1
D2
33μH
SW2
33μH
SW3
D3
TG1-3
ISP1-3
V C1-3
V IN
5V
C7
1μF
ISN1-3
V IN
PWM1-3
SHDN
LT3492
V REF
CTRL1-3
FADJ
150k
10k
49.9k
1.3MHz
470pF
GND
OVP1-3
3492 TA07a
C1-C3, C7: MURATA GRM31CR72A105KA01L
C4-C6: MURATA GRM21BR71H224KA01
D1-D3: DIODES B1100
L1-L3: TDK VLF5014AT-330MR50
PWM
5V/DIV
I LED
300:1 PWM Dimming at 100Hz
95
90
85
80
Ef?ciency
0.5A/DIV
75
I L
0.5A/DIV
70
5μs/DIV
3492 TA07b
65
60
55
50
0
20
40
60
80
100
PWM DUTY CYCLE (%)
3492 TA07c
3492fa
13
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