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LT3755IMSE-2#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LT3755/LT3755-1/LT3755-2
19
37551fd
V
IN
LT3755-2
L1
22µH
D1
GNDV
C
INTV
CC
SHDN/UVLO FB
V
REF
ISP
16.9k
INTV
CC
R1
1M
100k
C
IN
4.7µF
C
C
0.001µF
C
SS
0.01µF
V
IN
8V TO
40V
R2
187k
R
C
10k
R
T
28.7k
375kHz
C
VCC
4.7µF
SEE SUGGESTED LAYOUT, FIGURE 5
100k
NTC
RT1
CTRL
R
SENSE
0.015Ω
R
LED
0.1Ω
R3
1M
R4
23.7k
M1
M2
1A
C
OUT
4.7µF
50W
LED
STRING
37551 TA02a
OPENLED
PWM
SS
RT
ISN
GATE
SENSE
PWMOUT
L1: COILTRONICS DR127-220
M1: VISHAY SILICONIX SI7850DP
D1: DIODES INC. PDS5100
M2: VISHAY SILICONIX SI2308DS
RT1: MURATA NCP18WM1045
50W White LED Headlamp Driver
Efficiency vs Load
LOAD (A)
0.0
80
EFFICIENCY (%)
84
88
92
96
100
0.2
0.4 0.6 0.8
37551 TA02c
1.0
V
IN
= 12V
Waveforms for 50W LED Driver with
PWM Disconnect NFET
I
L1
2A/DIV
I
LED
500mA/DIV
50µs/DIV
V
OUT
= 50V
10V/DIV
PWM
0V TO 5V
37551 TA02b
V
IN
= 12V
TEMPERATURE (°C)
25
0
V
(ISP-ISN)
THRESHOLD (mV)
40
80
45 65 10585
120
20
60
100
125
37551 TA02d
V
(ISP-ISN)
Threshold vs Temperature
for NTC Resistor Divider
Typical applicaTions
LT3755/LT3755-1/LT3755-2
20
37551fd
Typical applicaTions
Buck Mode 1.4A LED Driver
V
IN
LT3755-2
L1
33µH
GND
200k
200k
V
C
INTV
CC
SHDN/UVLO
FB
V
REF
ISP
1M
C1
1µF
0.1µF
V
IN
15V TO
40V
0.001µF
0.068Ω
V
IN
L1: COILTRONICS DR125-330
M1: VISHAY SILICONIX SI7850DP
D1: ON SEMICONDUCTOR MBRS360
M2: ZETEX ZXMN4A06G
M3: ZETEX ZXM62P03E6
Q1: ZETEX FMMT558
107k
28.7k
375kHz
C2
4.7µF
CTRL
0.033Ω
1.5k
1k
110k
M1
Q1
M3
20k
47k
M2
D1
C3
4.7µF
37551 TA03a
OPENLED
PWM
SS
RT
ISN
PWMOUT
SENSE
GATE
1.4A
C4
4.7µF
3 LUXEON K2
- WHITE
100k
INTV
CC
Efficiency vs V
IN
V
IN
(V)
15
80
EFFICIENCY (%)
84
88
92
96
100
20
25 30 35
37551 TA03c
40
I
L1
1A/DIV
I
LED
1A/DIV
PWM
0V TO 5V
2µs/DIV
37551 TA03b
V
IN
= 24V
V
LED
= 10V
1000:1 PWM Dimming at 120Hz
with Buck Mode
LT3755/LT3755-1/LT3755-2
21
37551fd
Typical applicaTions
Buck Mode 500mA LED Driver for 20kHz PWM Dimming
V
IN
LT3755-2
L1
3.3µH
GNDV
C
FB
SHDN/UVLO
V
REF
ISP
1M
1M6V
0.1µF
V
IN
22V TO
36V
470pF
2200pF
0.2Ω
L1: TOKO 962BS_3R3M
M1: VISHAY SILICONIX SI7850DP
M2: VISHAY SILICONIX SI2306DS
D1: DIODES, INC SBM540
68.1k
CTRL
0.033Ω
M1
M2
22k
D1
37551 TA03a
INTV
CC
PWM
SS
ISN
PWMOUT
SENSE
RT
GATE
500mA
16V
2.2µF 2s
50V
4.7µF 2s
25V
0.22µF
OPENLED
13k
800kHz
4.7µF
Efficiency vs V
IN
PWM
I
LED
500mA/DIV
GATE
INDUCTOR
CURRENT
1A/DIV
500ns/DIV
37551 TA06b
Minimum PWM Pulse Switching Waveform
37551 TA06c
EFFICIENCY (%)
V
IN
(V)
15 25 3020 35 40
80
92
88
84
100
96
V
LED
= 16V
I
LED
= 0.5A
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

LT3755IMSE-2#TRPBF

Mfr. #:
Buy LT3755IMSE-2#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LED Lighting Drivers 75V Full-Featured LED Controller
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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