lt3743 Linear Technology Corporation, lt3743 Datasheet - Page 21

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

TYPICAL APPLICATIONS
45.2k
R
HOT
2nF
40k
R
680k
NTC
CTRL_SEL
82.5k
EN/UVLO
10nF
40k
PWM
4.7nF
34k
EN/UVLO
PWM
CTRL_SEL
RT
SYNC
V
CTRL_L
CTRL_H
CTRL_T
SS
REF
VCL
LT3743
94
92
90
88
86
84
82
80
Effi ciency (Stepping from 2A to 20A)
PWMGH
0
PWMGL
V
SENSE
SENSE
CBOOT
VCH
CC_INT
V
GREEN LED
IN
GND
SW
CTRL_SEL DIMMING DUTY CYCLE (%)
V
HG
LG
34k
FB
= 12V
IN
+
–
4.7nF
20
12V, 20A LED Driver
100nF
20μF
40
1μF
D1: LUMINUS PT120
L1: IHLP4040DZER1R0M01
M1: RJK0365DPA
M2: RJK0346DPA
M3, M4: Si7236DP
M1
M2
60
1.0μH
L1
200μF
80
2.5mΩ
3743 TA02b
V
12V
100
IN
M3
1mF
1mF
20A MAXIMUM
V
M4
OUT
1mF
3743 TA02
40.2k
10k
D1
1μF
LT3743
21
3743f