LT3491EDC#PBF Linear Technology, LT3491EDC#PBF Datasheet - Page 14

• 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

LT3491
TYPICAL APPLICATIO S
14
3V TO 5V
3V TO 5V
V
V
IN
IN
Li-Ion Driver for Three White LEDs
10µH
Li-Ion Driver for Five White LEDs
10µH
C1: TAIYO YUDEN LMK212BJ105MD
C2: TAIYO YUDEN GMK316BJ105ML
L1: MURATA LQH32CN100
C1
1µF
C1: TAIYO YUDEN LMK212BJ105MD
C2: TAIYO YUDEN GMK316BJ105ML
L1: MURATA LQH32CN100
C1
1µF
L1
L1
DIMMING CONTROL
DIMMING CONTROL
V
SW
V
SW
SHUTDOWN AND
IN
SHUTDOWN AND
IN
LT3491
LT3491
CTRL
GND
CTRL
GND
CAP
LED
CAP
LED
U
R
10Ω
SENSE
R
10Ω
3491 TA05a
SENSE
3491 TA04a
C2
1µF
C2
1µF
80
75
70
65
60
55
50
45
40
35
80
75
70
65
60
55
50
45
40
35
0
0
V
3 LEDs
V
5 LEDs
IN
IN
2
2
= 3.6V
= 3.6V
4
4
LED CURRENT (mA)
LED CURRENT (mA)
6
6
Efficiency
Efficiency
8
8
10
10
12 14 16 18
12 14 16 18
3491 TA04b
3491 TA05b
20
20
3491fa