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LT3954IUHE#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LT3954
25
3954fa
For more information www.linear.com/3954
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER
A 6/15 Clarified EN/ULVO Graph
Clarified PWM (Pin 32) Description
Clarified Internal PWM Oscillator Operation
Clarified Short-Circuit Protection for a Boosted Output Section
Clarified Figure 10
4, 7
9
15,16
21
21
LT3954
26
3954fa
For more information www.linear.com/3954
LINEAR TECHNOLOGY CORPORATION 2013
LT 0615 REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/3954
V
IN
(V)
5
80
EFFICIENCY (%)
7 9 11 13
100
95
90
85
15
3954 TA03b
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LT3955 High Side 80V, 3.5A, 1MHz LED Driver with 3,000:1 PWM
Dimming and Internal PWM Generator
V
IN
: 4.5V to 60V, V
OUT(MAX)
= 80V, 3000:1 True Color PWM, Analog,
I
SD
< 1µA, 5mm × 6mm QFN-36
LT3956 High Side 80V, 3.5A, 1MHz LED Driver with 3,000:1 PWM
Dimming
V
IN
: 6V to 80V, V
OUT(MAX)
= 80V, 3000:1 True Color PWM, Analog, I
SD
< 1µA, 5mm × 6mm QFN-36
LT3761 High Side 100V, 1MHz LED Controller with 3,000:1 PWM
Dimming and Internal PWM Generator
V
IN
: 4.5V to 60V, V
OUT(MAX)
= 80V, 3000:1 True Color PWM, Analog,
I
SD
< 1µA, MSOP-16E
LT3791/LT3791-1 60V, Synchronous Buck-Boost 1MHz LED Controller V
IN
: 4.7V to 60V, V
OUT
: 0V to 60V, 100:1 True Color PWM, Analog,
I
SD
< 1µA, TSSOP-38E
LT3755/LT3755-1
LT3755-2
High Side
60V, 1MHz LED Controller with T
rue Color 3,000:1
PWM Dimming
V
IN
: 4.5V to 40V, V
OUT
: 5V to 60V, 3,000:1 True Color PWM, Analog,
I
SD
< 1µA, 3mm × 3mm QFN-16, MSOP-16E
LT3756/LT3756-1
LT3756-2
High Side
100V, 1MHz LED Controller with 3,000:1 P
WM
Dimming, Input/Output Current Limit
V
IN
: 6V to 100V, V
OUT
: 5V to 100V, 3,000:1 True Color PWM, Analog,
I
SD
< 1µA, 3mm × 3mm QFN-16, MSOP-16E
LT3743 Synchronous Step-Down 20A LED Driver with Three-State
LED Current Control
V
IN
: 5.5V to 36V, V
OUT
: 5.5V to 35V, 3,000:1 True Color PWM, Analog,
I
SD
< 1µA, 4mm × 5mm QFN-28, TSSOP-28E
LT3796/LT3796-1 High Side 100V, 1MHz LED Controller with True Color 3,000:1
PWM Dimming
V
IN
: 6V to 100V, V
OUT(MAX)
= 100V, 3000:1 True Color PWM, Analog,
I
SD
< 1µA, TSSOP-28E
10W SEPIC LED Driver
INTV
CC
10µF
25V
×2
2.2µF
25V
1µF
182k
M1
D1
10.7k
10W
LED
STRING
0.5Ω
500mA
•
V
IN
SW
LT3954
GNDK
GND
V
C RT
EN/UVLO
V
REF
1M
100k
INTV
CC
499k
4.7µF
25V
10nF
V
IN
5V TO 15V
10nF
147k
15k
28.7k
350kHz
165k
CTRL
3954 TA03a
VMODE
DIM/SS
PWM
L1, 22µH
1:1
•
INTV
CC
FB
ISP
ISN
PGND
SYNC
PWMOUT
M1: VISHAY Si2306BD
L1: COILTRONICS DRQ127-220-R
D1: DIODES PDS3100
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 V
IN
3000:1 PWM Dimming at 120Hz
1µs/DIV
3754 TA03c
PWM
5V/DIV
I
LED
0.2A/DIV
V
IN
= 15V
V
LED
= 20V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

LT3954IUHE#PBF

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Buy LT3954IUHE#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LED Lighting Drivers 40Vin, 5A LED Driver with Internal PWM Driver
Lifecycle:
New from this manufacturer.
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