LT3492 LINER [Linear Technology], LT3492 Datasheet - Page 13

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

TYPICAL APPLICATIONS
0.1A/DIV
0.5A/DIV
5V/DIV
PWM
I
LED
I
L
V
1000:1 PWM Dimming at 100Hz
5V
IN
C5
1μF
PV
12V
IN
2μs/DIV
C1: MURATA GRM31MR71C225KA35
C2-C4: MURATA GRM31CR72A105KA01L
C5: MURATA GRM31MR71H105KA88
D1-D3: DIODES B1100
L1-L3: TDK VLF5014AT-220MR62
M1-M3: ZETEX ZXMP6A13F
ISP1-3
ISN1-3
V
PWM1-3
SHDN
IN
SW1
12 LEDs
TG1
1μF
C2
22μH
L1
3492 TA03b
M1
1Ω
D1
100mA
Triple Boost 100mA × 12 LED Driver
ISP1
ISN1
2.2μF
C1
1M
20k
3
OVP1
SW2
LT3492
GND
12 LEDs
TG2
1μF
C3
22μH
L2
M2
1Ω
D2
100mA
ISP2
ISN2
85
80
75
70
65
60
55
50
1M
20k
0
OVP2
Effi ciency vs PWM Duty Cycle
SW3
20
12 LEDs
TG3
PWM DUTY CYCLE (%)
1μF
CTRL1-3
C4
OVP1-3
TG1-3
V
FADJ
V
22μH
C1-3
3492 TA03a
REF
40
L3
M3
1Ω
D3
100mA
150k
49.9k
60
ISP3
ISN3
18.2k
1.3MHz
1M
20k
80
2.2nF
OVP3
3492 TA03c
100
LT3492
13
3492f