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LT3478 データシート(PDF) 24 Page - Linear Technology

部品番号 LT3478
部品情報  4.5A Monolithic LED Drivers with True Color PWM Dimming
PDF  24 Pages
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メーカー  LINER [Linear Technology]
ホームページ  http://www.linear.com
Logo LINER - Linear Technology

LT3478 データシート(HTML) 24 Page - Linear Technology

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LT3478/LT3478-1
24
34781f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
LT 0107 • PRINTED IN USA
TYPICAL APPLICATIO
RELATED PARTS
LT3478
SHDN
VREF
OUT
LED
CTRL2
CTRL1
OVPSET
PWM
SS
VC
RT
VIN
VS
LSW
C2
3.3
µF
25V
C3
3.3
µF
10V
R1
8.25k
RSENSE
0.42
Ω
RT
10k
fOSC = 2MHz
100Hz
R2
10k
PWM
DIMMING RATIO = 1000:1
L1: CDRH6D28
D1: ZLLS1000
Q1: Si2318DS
LEDs: LUXEON I (WHITE)
250mA
D1
3478 TA05a
L1
10
µH
VIN
3.3V
3.3V
0V
VS
8V TO 16V
C1
4.7
µF
25V
CC
0.1
µF
CSS
1
µF
R3
10k
Q1
VS (V)
8
100
95
90
85
80
75
70
60
65
3478 TA05b
12
16
14
10
VIN = 3.3V
ILED = 250mA
fOSC = 2MHz
PWM DUTY CYCLE = 100%
6 LEDs = LUXEON I (WHITE)
6W, 6 LEDs at 250mA, Boost LED Driver
Efficiency vs Input VS
PART NUMBER DESCRIPTION
COMMENTS
LT1618
Constant Current, 1.4MHz, 1.5A Boost Converter with Analog/PWM
Dimming
VIN: 5V to 18V, VOUT(MAX) = 36V, ISD <1µA, MS10 Package
LT3003
Three Channel LED Ballaster with 3,000:1 True Color PWM Dimming
VIN: 3V to 48V, ISD <5µA, MSOP10 Package
LT3474
36V, 1A (ILED), 2MHz,Step-Down LED Driver with 400:1 True Color
PWM Dimming
VIN: 4V to 36V, VOUT(MAX) = 13.5V, ISD <1µA, TSSOP16E Package
LT3475
Dual 1.5A(ILED), 36V, 2MHz,Step-Down LED Driver 3,000:1 True
Color PWM Dimming
VIN: 4V to 36V, VOUT(MAX) = 13.5V, ISD <1µA, TSSOP20E Package
LT3476
Quad Output 1.5A, 2MHz High Current LED Driver with 1,000:1 True
Color PWM Dimming
VIN: 2.8V to 16V, VOUT(MAX) = 36V, ISD <10µA, 5mm × 7mm QFN
Package
LT3477
42V, 3A, 3.5MHz Boost, Buck-Boost, Buck LED Driver with Analog/
PWM Dimming
VIN: 2.5V to 25V, VOUT(MAX) = 40V, ISD <1µA, QFN, TSSOP20E
Packages
LT3479
3A, 3.5MHz Full Featured DC/DC Converter with Soft-Start and
Inrush Current Protection and Analog/PWM Dimming
VIN: 2.5V to 24V, VOUT(MAX) = 40V, ISD <1µA, 4mm × 3mm DFN,
TSSOP16E Packages
LT3486
Dual 1.3A , 2MHz High Current LED Driver with 1,000:1 True Color
PWM Dimming
VIN: 2.5V to 24V, VOUT(MAX) = 36V, ISD <1µA, 5mm × 3mm DFN,
TSSOP16E Packages
LTC3783
High Current LED Controller with 3,000:1 True Color PWM Dimming
VIN: 3V to 36V, VOUT(MAX) = Ext FET, ISD <20µA, 5mm × 4mm
DFN, TSSOP16E Packages



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