LT3492 LINER [Linear Technology], LT3492 Datasheet - Page 14

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

LT3492
TYPICAL APPLICATIONS
14
0.2A/DIV
0.5A/DIV
5V/DIV
3V TO 12V
PWM
1000:1 PWM Dimming at 100Hz for 200mA LEDs
I
LED
I
I
L2
L3
V
IN
C5
1μF
C1: MURATA GRM31MR71C225KA35
C2-C4: MURATA GRM31CR72A105KA01L
C5: MURATA GRM31MR71H105KA88
D1-D3: DIODES B1100
L1-L3: TDK VLF5014AT-220MR62
M1, M2: ZETEX ZXMP6A13F
2μs/DIV
ISP1-3
ISN1-3
V
PWM1-3
SHDN
IN
SW1 TG1
PV
12V
IN
12 LEDs
1μF
C2
22μH
L1
3492 TA04b
M1
1Ω
D1
100mA
ISP1
ISN1
Dual Boost LED Driver
1M
20k
2.2μF
OVP1
C1
3
LT3492
SW2
GND
1μF
C3
22μH
L2
Effi ciency vs PWM Duty Cycle for 200mA LEDs
1Ω
D2
ISP2
ISN2
85
80
75
70
65
55
50
60
0
SW3 TG2
20
PWM DUTY CYCLE (%)
12 LEDs
1μF
C4
40
CTRL1-3
OVP1-3
22μH
V
V
FADJ
TG3
C1-3
REF
L3
3492 TA04
60
M2
1Ω
D3
200mA
ISP3
ISN3
OPEN
150k
49.9k
1.3MHz
80
3492 TA04c
18.2k
1M
20k
OVP2-3
100
2.2nF
3492f