lt3743 Linear Technology Corporation, lt3743 Datasheet - Page 22

• Manufacturer Part Number: lt3743
• Description: High Current Synchronous Step-down Led Driver With Three-state Control
• Manufacturer: Linear Technology Corporation

LT3743
TYPICAL APPLICATIONS
22
45.3k
45.3k
R
R
HOT
HOT
2nF
2nF
R
680k
R
680k
CONTROL
NTC
NTC
INPUT
CTRL_SEL
82.5k
CTRL_SEL
82.5k
CONTROL
6V to 36V, 2A LED Driver With Current Limited Shunted Output
EN/UVLO
EN/UVLO
10nF
10nF
INTV
INTV
INPUT
CC
CC
6V to 36V, 2A LED Driver With Shunted Output
4.7nF
4.7nF
34k
34k
EN/UVLO
PWM
CTRL_SEL
EN/UVLO
PWM
CTRL_SEL
RT
SYNC
V
CTRL_L
CTRL_H
CTRL_T
SS
RT
SYNC
V
CTRL_H
CTRL_L
CTRL_T
SS
REF
REF
VCL
VCL
LT3743
LT3743
PWMGH
PWMGH
PWMGL
PWMGL
SENSE
SENSE
SENSE
SENSE
V
V
CBOOT
CBOOT
VCH
VCH
CC_INT
CC_INT
GND
GND
SW
SW
V
V
HG
HG
34k
34k
LG
LG
FB
FB
IN
IN
+
–
+
–
4.7nF
4.7nF
100nF
100nF
20μF
20μF
1μF
1μF
D1: LUMINUS CBT-40
L1: IHLP4040DZE10R0M01
M1, M2: Si7848BDP
M3: Si2312BDS
D1: LUMINUS CBT-40
L1: MSS1048-103MLB
M1, M2: Si7848BDP
M3: Si2312BDS
M1
M2
M1
M2
10μH
10μH
L1
L1
8μF
8μF
25mΩ
25mΩ
V
6V TO 36V
V
6V TO 36V
IN
IN
2A MAXIMUM
M3
M3
V
OUT
2A MAXIMUM
V
D1
D1
OUT
40.2k
10k
3743 TA04
40.2k
10k
3743 TA03
2.2μF
2.2μF
CTRL_SEL
CTRL_SEL
10V/DIV
5V/DIV
2A/DIV
1A/DIV
5V/DIV
2A/DIV
1A/DIV
2V/DIV
I
LED
SW
I
I
LED
SW
Shunted Output with CTRL_L at GND
L
I
L
Shunted Output with CTRL_H
Equal to CTRL_L
20μs/DIV
20μs/DIV
3743 TA04b
3743 TA03b
3743f