Datasheet

LT3761
28
3761f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2012
LT 0812 • PRINTED IN USA
V
IN
(V)
10
80
EFFICIENCY (%)
84
88
92
96
100
0.6
0.6
LED CURRENT (A)
0.2
0.4
0.8
1.0
20 30
37551 TA03b
605040
LED CURRENT
PWM TIED TO INTV
CC
EFFICIENCY
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LT3755/LT3755-1/
LT3755-2
High Side 40V, 1MHz LED Controller with True Color 3000:1
PWM Dimming
V
IN
: 4.5V to 40V, V
OUT(MAX)
= 75V, 3000:1 True Color PWM Dimming
I
SD
< 1μA, 3mm × 3mm QFN-16 and MSOP-16E Packages
LT3756/LT3756-1/
LT3756-2
High Side 100V, 1MHz LED Controller with True Color 3000:1
PWM Dimming
V
IN
: 6V to 100V, V
OUT(MAX)
= 100V, 3000:1 True Color PWM Dimming
I
SD
< 1μA, 3mm × 3mm QFN-16 and MSOP-16E Packages
LT3796 High Side 100V, 1MHz LED Controller with True Color 3000:1
PWM Dimming, PMOS Disconnect FET Driver, Input Current
Limit and Input/Output Current Reporting
V
IN
: 6V to 100V, V
OUT(MAX)
= 100V, 3000:1 True Color PWM Dimming
I
SD
< 1μA, TSSOP-28E Packages
LT3956 High Side 80V, 3.5A, 1MHz LED Driver with True Color 3,000:1
PWM Dimming
V
IN
: 6V to 80V, V
OUT(MAX)
= 80V, True Color PWM Dimming = 3000:1,
I
SD
< 1μA, 5mm × 6mm QFN-36 Package
LT3754 60V, 1MHz Boost 16-Channel 40mA LED Driver with True
Color 3000:1 PWM Dimming and 2% Current Matching
V
IN
: 4.5V to 40V, V
OUT(MAX)
= 60V, True Color PWM Dimming = 3000:1,
I
SD
< 1μA, 5mm × 5mm QFN-32 Package
LT3518 2.3A, 2.5MHz High Current LED Driver with 3000:1 Dimming
with PMOS Disconnect FET Driver
V
IN
: 3V to 30V, V
OUT(MAX)
= 45V, 3000:1 True Color PWM Dimming,
I
SD
< 1μA, 4mm × 4mm QFN-16 and TSSOP-16E Packages
LT3478/LT3478-1 4.5A, 2MHz High Current LED Driver with 3000:1 Dimming V
IN
: 2.8V to 36V, V
OUT(MAX)
= 40V, 3000:1 True Color PWM Dimming,
I
SD
< 1μA, TSSOP-16E Package
LT3791/LT3791-1 60V, Synchronous Buck-Boost 700kHz LED Controller V
IN
: 4.7V to 60V, V
OUT
Range: 0V to 60V, True Color PWM,
Analog = 100:1, I
SD
< 1µA, TSSOP-38E Package
80W High Voltage Boost LED Driver with 25:1 Internally Generated PWM Dimming
HV Boost Efficiency and
LED Current vs V
IN
Dimming Waveform
V
IN
LT3761
RTV
C
INTV
CC
EN/UVLO
FB
V
REF
SENSE
590k
100k
INTV
CC
INTV
CC
187k
2.2µF
×2
100V
4.7nF
0.1µF
10nF
1.4kHz
C
OUT
0.22µF
×8
250V
V
IN
12V TO
60V
124k
21k
2k
39.2k
250kHz
1µF
20k
CTRL
12mΩ
1M
0805
8.66k
80W
LED
STRING
135V MAX
3761 TA03a
OPENLED
DIM/SS
DIM
0V TO
8V
PWM
GND
ISP
ISN
GATE
PWMOUT
0.39Ω
650mA
M1, M2: INFINEON BSC520N15
D1: DIODES PDS4150
L1: COILTRONICS HC9-220-R
C
OUT
: TDK C3225X7R2E224K
CURRENT DERATED
FOR V
IN
< 35V
L1
22µH
M1
D1
M2
PWM
(1V/DIV)
I
LED
(0.2A/DIV)
200µs/DIV
3761 TA03c
DIM = 4V
V
IN
= 36V
V
LED
= 134V