LT3954IUHE Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT3954IUHE Datasheet PDF : 26 Pages
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LT3954
TYPICAL APPLICATION
10W SEPIC LED Driver
VIN
5V TO 15V
4.7µF 499k
25V
147k 1M
L1, 22µH
1:1
2.2µF
25V
D1
VIN
SW
EN/UVLO
VREF
• 10µF
25V
×2
182k 0.5Ω 500mA
INTVCC
100k
CTRL LT3954 PGND
165k
FB
VMODE
ISP
ISN
10.7k
10W
LED
STRING
PWM
DIM/SS
PWMOUT
SYNC
INTVCC
VC GND GNDK RT
INTVCC
1µF
M1
10nF
M1: VISHAY Si2306BD
L1: COILTRONICS DRQ127-220-R
D1: DIODES PDS3100
15k
10nF
28.7k
350kHz
3954 TA03a
NOTE: GND, GNDK AND SIGNAL LEVEL COMPONENTS MUST BE CONNECTED EXTERNALLY AS SHOWN.
AN INTERNAL CONNECTION BETWEEN GNDK AND PGND PINS PROVIDES GROUNDING TO THE SUPPLY
Efficiency vs VIN
100
3000:1 PWM Dimming at 120Hz
95
PWM
5V/DIV
90
85
80
5
7
9
11
VIN (V)
13
15
3954 TA03b
ILED
0.2A/DIV
VIN = 15V
VLED = 20V
1µs/DIV
3754 TA03c
RELATED PARTS
PART NUMBER DESCRIPTION
LT3955
High Side 80V, 3.5A, 1MHz LED Driver with 3,000:1 PWM
Dimming and Internal PWM Generator
LT3956
High Side 80V, 3.5A, 1MHz LED Driver with 3,000:1 PWM
Dimming
LT3761
High Side 100V, 1MHz LED Controller with 3,000:1 PWM
Dimming and Internal PWM Generator
LT3791/LT3791-1 60V, Synchronous Buck-Boost 1MHz LED Controller
LT3755/LT3755-1 High Side 60V, 1MHz LED Controller with True Color 3,000:1
LT3755-2
PWM Dimming
LT3756/LT3756-1 High Side 100V, 1MHz LED Controller with 3,000:1 PWM
LT3756-2
Dimming, Input/Output Current Limit
LT3743
Synchronous Step-Down 20A LED Driver with Three-State
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LT3796/LT3796-1 High Side 100V, 1MHz LED Controller with True Color 3,000:1
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COMMENTS
VIN: 4.5V to 60V, VOUT(MAX) = 80V, 3000:1 True Color PWM, Analog,
ISD < 1µA, 5mm × 6mm QFN-36
VIN: 6V to 80V, VOUT(MAX) = 80V, 3000:1 True Color PWM, Analog, ISD
< 1µA, 5mm × 6mm QFN-36
VIN: 4.5V to 60V, VOUT(MAX) = 80V, 3000:1 True Color PWM, Analog,
ISD < 1µA, MSOP-16E
VIN: 4.7V to 60V, VOUT: 0V to 60V, 100:1 True Color PWM, Analog,
ISD < 1µA, TSSOP-38E
VIN: 4.5V to 40V, VOUT: 5V to 60V, 3,000:1 True Color PWM, Analog,
ISD < 1µA, 3mm × 3mm QFN-16, MSOP-16E
VIN: 6V to 100V, VOUT: 5V to 100V, 3,000:1 True Color PWM, Analog,
ISD < 1µA, 3mm × 3mm QFN-16, MSOP-16E
VIN: 5.5V to 36V, VOUT: 5.5V to 35V, 3,000:1 True Color PWM, Analog,
ISD < 1µA, 4mm × 5mm QFN-28, TSSOP-28E
VIN: 6V to 100V, VOUT(MAX) = 100V, 3000:1 True Color PWM, Analog,
ISD < 1µA, TSSOP-28E
3954fa
26 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 9503F5or-7m4o1r7e information www.linear.com/3954
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/3954
LT 0615 REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2013
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