LT3492 LINER [Linear Technology], LT3492 Datasheet - Page 17

• Manufacturer Part Number: LT3492
• Description: Triple Output LED Driver with 3000:1 PWM Dimming
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
0.5A/DIV
0.5A/DIV
5V/DIV
PWM
I
LED
I
L
V
5V
IN
2000:1 PWM Dimming at 100Hz
OVP1
C7
1μF
M4
80.6k
2k
PV
10 LEDs
48V
TG1
IN
5.6k
C1-C3, C7: MURATA GRM31CR72A105KA01L
C4-C6: MURATA GRM21BR72A474KA73
D1-D3: ROHM RB160M-60
L1-L3: TDK VLF5014AT-220MR62
M1-M3: ZETEX ZXMP6A13F
M4-M6: PHILIPS BC858B
1μs/DIV
ISP1-3
ISN1-3
V
PWM1-3
SHDN
22μH
IN
L1
SW1
M1
330mΩ
0.3A
ISP1
ISN1
Triple Buck Mode LED Driver with Open LED Protection
D1
0.47μF
C4
10 LEDs
0.47μF
3492 TA02b
TG2
C5
D2
SW2
L2
22μH
M2
330mΩ
0.3A
ISP2
ISN2
5.6k
LT3492
GND
M5
80.6k
2k
OVP2
OVP1
Effi ciency vs PWM Duty Cycle for 200mA LEDs
M6
95
90
85
80
75
70
65
60
50
55
0
80.6k
2k
10 LEDs
5.6k
22μH
20
L3
M3
PWM DUTY CYCLE (%)
SW3
330mΩ
0.3A
40
CTRL1-3
ISP3
ISN3
OVP1-3
D3
0.47μF
TG1-3
V
V
FADJ
C6
TG3
C1-3
REF
3492 TA02
60
430k
100k
1MHz
10k
80
C1-C3
1μF
3
3492 TA02c
470pF
100
LT3492
17
3492f