LT3491EDC#PBF Linear Technology, LT3491EDC#PBF Datasheet - Page 12

• Manufacturer Part Number: LT3491EDC#PBF
• Description: IC, LED DRVR, DFN6
• Manufacturer: Linear Technology

Specifications of LT3491EDC#PBF

• Led Driver Application: Mobile Phone Display Lighting, General LED Lighting
• No. Of Outputs: 1
• Output Current: 200mA
• Output Voltage: 32V
• Input Voltage: 2.5V To 12V
• Dimming Control Type: PWM
• Topology: Boost (Step Up)
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

680mV
LT3491
TYPICAL APPLICATIO S
V
12
CTRL
2-Cell Li-Ion Driver for Torch and Flash Mode LED Control
TORCH MODE
I
LED
3V TO 5V
3V TO 5V
= 100mA
I
FLASH MODE
V
LED
V
IN
IN
= 200mA
C1: TAIYO YUDEN LMK212BJ105MD
C2: TAIYO YUDEN GMK316BJ105ML
L1: MURATA LQH32CN100
Li-Ion Driver for Two White LEDs
C1: TAIYO YUDEN LMK212BJ105MD
C2: TAIYO YUDEN GMK316BJ105ML
L1: MURATA LQH32CN100
Li-Ion Driver for One White LED
6V TO 9V
C1
1µF
C1
1µF
10µH
10µH
V
V
1.5V
IN
CTRL
L1
L1
V
SW
V
SW
IN
IN
C1: TAIYO YUDEN LMK212BJ105MD
C2: TAIYO YUDEN LMK212BJ475MG
D1: AOT-2015 HPW1751B
L1: MURATA LQH32CN100
1µF
C2
1µF
LT3491
C2
LT3491
LED
GND
C1
1µF
LED
GND
U
R
CTRL
V
CTRL
3491 TA07a
R
CTRL
3491 TA08a
SENSE
10Ω
CAP
IN
SENSE
10Ω
CAP
CAP
R
LT3491
SENSE
GND
1Ω
SHUTDOWN
AND
DIMMING
CONTROL
4.7µF
SHUTDOWN
AND
DIMMING
CONTROL
LED
C2
3491 TA09a
SW
D1
L1
10µH
40
10
80
75
70
65
60
55
50
60
55
50
45
35
30
25
20
15
60
55
45
40
25
70
65
50
35
30
6
0
0
I
V
V
LED
IN
IN
= 3.6V
= 3.6V
= 100mA
6.5
5
5
LED CURRENT (mA)
LED CURRENT (mA)
7
Efficiency
Efficiency
Efficiency
V
IN
7.5
10
10
(V)
8
15
15
8.5
3491 TA08b
3491 TA09b
3491 TA07b
20
20
9
3491fa