LT3755 LINER [Linear Technology], LT3755 Datasheet - Page 20

• Manufacturer Part Number: LT3755
• Description: 40VIN, 75VOUT LED Controller
• Manufacturer: LINER [Linear Technology]

LT3755/LT3755-1
TYPICAL APPLICATIONS
20
500mA/DIV
PWM
I
LED
1500:1 PWM Dimming at 100Hz
10V TO
M1: VISHAY SILICONIX SI7850DP
M2: VISHAY SILICONIX SI1471DH
Q1: MMBT2222A NPN
Q2: FMMT558 PNP
D1: VISHAY 30BQ060
L1: SUMIDA CDRH8D43-100
36V
V
IN
INTV
CC
100k
10μs/DIV
10k
1M
267k
0.1μF
28.7k
400kHz
Buck Mode 1.5A LED Driver with PWM Dimming
37551 TA06b
SHDN/UVLO
V
CTRL
PWM
OPENLED
SS
RT
INTV
C1
1μF
REF
CC
4.7μF
LT3755
V
V
C
IN
15k
2200pF
GND
PWMOUT
SENSE
GATE
ISP
ISN
FB
510k
Q1
1k
100
95
90
85
80
75
70
Buck Mode Effi ciency vs Input Voltage
0
5
M1
0.033Ω
0.068Ω
L1
10μH
10
1.5A
8.5V MAX
INPUT VOLTAGE (V)
16V
22μF
D1
15
37551 TA06a
20
100k
25
30
Q2
249k
22.1k
37551 TA06c
35
40
37551fa