LT3756-1 LINER [Linear Technology], LT3756-1 Datasheet - Page 23

• Manufacturer Part Number: LT3756-1
• Description: 60VIN LED Controller with Internal PWM Generator
• Manufacturer: LINER [Linear Technology]

Typical applicaTions
PWMOUT
0.5A/DIV
INTERNALLY GENERATED
I
LED
High Side Disconnect Internally Generated
PWM DIMMING
DIM
OPTION FOR
8V TO
V
IN
60V
V
= 24V, V
IN
124k
M1: INFINEON BSC123NO8NS3-G
D1: DIODES INC PDS5100
L1: COILTRONICS HC9-100-R
M2: VISHAY SILICONIX Si7113DN
D2: VISHAY 10BQ100
Q1: CENTRAL CMPT3906
Q2: ZETEX FMMT493
Boost LED Driver with Output Short-Circuit Protection with Internally Generated PWM
PWM Dimming Waveform
LED
640Hz
2.2µF
×2
100V
22nF
= 60V, DIM = 0V
INTV
CC
100k
499k
90.9k
10µs/DIV
10nF
1M
140k
EN/UVLO
V
CTRL
OPENLED
DIM/SS
PWM
V
REF
C
5.1k
4.7nF
OPTIONAL CIRCUIT
FOR ALWAYS-ON
LT3761
1N4148
3761 TA09b
OPERATION
V
RT
IN
28.7k
350kHz
PWMOUT
INTV
SENSE
28k
GATE
GND
10µH
ISP
ISN
FB
L1
CC
1µF
INTV
M1
10m
D1
CC
PWMOUT
DIM = 8V
2A/DIV
V
Mode Operation with Internally Generated PWM
I
Output Short-Circuit Waveform Showing Hiccup
LED
LED
52V
0V
+
+
2.2µF
×4
100V
1M
16.9k
0.25
2.4k
20k
LED
Q2
1k
1k
+
SHORT TO GND
1ms/DIV
CURRENT DERATED
D2
150pF
FOR V
Q1
IN
< 10V
M2
LED
3761 TA09a
I
1A
LED
+
60W
LED
STRING
3761 TA09c
LT3761
23
3761f