Datasheet

LT3486
20
3486fe
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2008
LT 0111 REV E • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LT1618 Constant Current, Constant Voltage 1.24MHz, High Efficiency
Boost Regulator
Up to 16 White LEDs, V
IN
: 1.6V to 18V, V
OUT(MAX)
= 34V,
I
Q
= 1.8mA, I
SD
< 1µA, MS Package
LT1932 Constant Current, 1.2MHz, High Efficiency White LED Boost
Regulator
Up to 8 White LEDs, V
IN
: 1V to 10V, V
OUT(MAX)
= 34V,
I
Q
= 1.2mA, I
SD
< 1µA, ThinSOT
TM
Package
LT1937 Constant Current, 1.2MHz, High Efficiency White LED Boost
Regulator
Up to 4 White LEDs, V
IN
: 2.5V to 10V, V
OUT(MAX)
= 34V,
I
Q
= 1.9mA, I
SD
< 1µA, ThinSOT, SC70 Packages
LTC3200 Low Noise, 2MHz, Regulated Charge Pump White LED Driver
MS Package
Up to 6 White LEDs, V
IN
: 2.7V to 4.5V, I
Q
= 8mA, I
SD
< 1µA,
LTC3200-5 Low Noise, 2MHz, Regulated Charge Pump White LED Driver
ThinSOT Package
Up to 6 White LEDs, V
IN
: 2.7V to 4.5V, I
Q
= 8mA, I
SD
< 1µA,
LTC3201 Low Noise, 1.7MHz, Regulated Charge Pump White LED Driver
MS Package
Up to 6 White LEDs, V
IN
: 2.7V to 4.5V, I
Q
= 6.5mA, I
SD
< 1µA,
LTC3202 Low Noise, 1.5MHz, Regulated Charge Pump White LED Driver
MS Package
Up to 8 White LEDs, V
IN
: 2.7V to 4.5V, I
Q
= 5mA, I
SD
< 1µA,
LTC3205 High Efficiency, Multidisplay LED Controller Up to 4 (Main), 2 (Sub) and RGB, V
IN
: 2.8V to 4.5V,
I
Q
= 50µA, I
SD
< 1µA, QFN-24 Package
LT3465/LT3465A Constant Current, 1.2MHz/2.7MHz, High Efficiency White LED
Boost Regulator with Integrated Schottky Diode
Up to Six White LEDs, V
IN
: 2.7V to 16V, V
OUT(MAX)
= 34V,
I
Q
= 1.9mA, I
SD
< 1µA, ThinSOT Package
LT3466 Dual Full Function White LED Boost Regulator with Integrated
Schottky Diode
Drives Up to 20 LEDs, V
IN
: 2.7V to 24V, V
OUT(MAX)
= 40V,
I
Q
= 5mA, I
SD
< 16µA, DFN Package
12V to 8/8 White LEDs
LED Current and Efficiency
vs PWM Duty Cycle
3486 TA10a
12V (TYP)
9V TO 15V
C
OUT1
2.2µF
C
OUT2
2.2µF
100mA
PWM
FREQ?
1kHz
R
FB1
2Ω
R
FB2
2Ω
100mA
OFF ON
D1
Q1
100k 100k
3.65k
3.65k
21.5k
Q2
5V
D2
C
IN
10µF
C1 1µF
L1
10µH
L2
10µH
V
IN
V
IN
DIMMING
INPUT 1
DIMMING
INPUT 2
2.2nF
22pF
2.2nF
LUXEON
LEDs
LXCL-PWF1
LUXEON
LEDs
LXCL-PWF1
C
OUT1
, C
OUT2
: 35V, X5R OR X7R
C
IN
: 25V, X5R OR X7R
C1: 10V, X5R OR X7R
C
REF
: 6.3V, X5R OR X7R
C
REF
0.1µF
V
C1
V
C2
R
T
SW1 SW2
V
IN
LT3486
OVP2
CTRL2
REF
PWM2
FB2
OVP1
CTRL1
SHDN
PWM1
FB1
PWM
FREQ
1kHz
D1, D2: ZETEX ZLLS1000
L1, L2: TOKO D53LC (TYPE A)
Q1, Q2: FAIRCHILD FDN5630
PWM DUTY CYCLE (%)
0
60
EFFICIENCY (%)
LED CURRENT (mA)
65
70
75
80
85
90
0
20
40
60
80
100
120
20 40 60 80
3486 TA10b
100
EFFICIENCY
LED CURRENT
V
IN
= 12V
8/8 LEDs