LT3477IUF-TR Просмотр технического описания (PDF) - Linear Technology
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LT3477IUF-TR Datasheet PDF : 20 Pages
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LT3477
TYPICAL APPLICATIO
Buck Mode High Current LED Driver
PVIN
32V
R1
0.1Ω
C1
2.2µF
LED1
1A
•••
LED4
LED
STRING C2
1µF
L1
33µH D1
VIN
3.3V
C3
3.3µF
ISP1
ISN1
VIN
IADJ1
IADJ2
SW
FBN
SHDN SHDN LT3477
ISP2
R3
280k
R4
10k
VC
ISN2
RC
VREF
RT
1k
FBP GND SS
CC
4.7nF
C4
R2
33nF 22k
C1: NIPPON UNITED CHEMICON NTS40X5R1H225M
C2: TAIYO YUDEN GMK316BJ105ML
C3: TAIYO YUDEN LMK316BJ475
L1: TOKO A814AY-330M
D1: DIODES INC DFLS140
3477 TA07
100
90
80
70
60
50
40
30
20
0
Efficiency
0.2
0.4 0.6
0.8
1
LED CURRENT (A)
3477 TA05b
RELATED PARTS
PART NUMBER
LT1618
LT3436
LTC®3453
LT3466
LT3479
LTC3490
DESCRIPTION
Constant Current, Constant Voltage 1.4MHz,
High Efficiency Boost Regulator
3A (ISW), 800kHz, 34V Step-Up DC/DC Converter
Synchronous Buck-Boost High Power White
LED Driver
Dual Constant Current, 2MHz, High Efficiency
White LED Boost Regulator with Integrated
Schottky Diode
3A, 42V Full Featured Boost/Inverter Converter
with Soft-Start
Single Cell 350mA, 1.3MHz LED Driver
COMMENTS
VIN: 1.6V to 18V, VOUT(MAX) = 5.5V, IQ = 2.5mA, ISD < 1µA, QFN16 Package
VIN: 3V to 25V, VOUT(MAX) = 34V, IQ = 0.9mA, ISD < 6µA, TSSOP16E Package
VIN: 2.7V to 5.5V, VOUT(MAX) = 5.5V, IQ = 2.5mA, ISD < 1µA, QFN16 Package
VIN: 2.7V to 24V, VOUT(MAX) = 40V, IQ = 5mA, ISD < 16µA, DFN Package
VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 5mA, ISD < 1µA, DFN/TSSOP Packages
VIN: 1V to 3.2V, VOUT(MAX) = 4.7V, ISD < 1µA, DFN/SO8 Packages
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
3477fb
LT 0207 REV B • PRINTED IN THE USA
© LINEAR TECHNOLOGY CORPORATION 2005
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