Datasheet

LT3743
21
3743fd
TYPICAL APPLICATIONS
12V, 20A LED Driver
EN/UVLO
PWM
CTRL_SEL
EN/UVLO
PWM
CTRL_SEL
HG
V
IN
CBOOT
V
REF
CTRL_L
CTRL_H
CTRL_T
LT3743
RT
SYNC
SW
LG
GND
V
CH
V
CL
SENSE
+
SENSE
–
PWMGH
PWMGL
V
CC_INT
100nF
L1
1.0µH
22µF
C1
330µF
×3
2.5mΩ
33nF
FB
10nF
34k
4.7nF
34k
D1: LUMINUS PT120
L1: IHLP4040DZER1R0M01
M1: RJK0365DPA
M2: RJK0346DPA
M3, M4: Si7236DP
C1, C2, C3: PTPR330M9L (THREE IN PARALLEL)
4.7nF
82.5k
50k
50k
C3
330µF
×3
D1
60.4k
3743 TA02
10k
1µF
2.2nF
R
NTC
10k
220µF
M1
M2
M3
M4
V
IN
12V
OUTPUT
20A MAXIMUM
1µF
C2
330µF
×3
SS
R
HOT
499Ω
10Ω 10Ω
CTRL_SEL DIMMING DUTY CYCLE (%)
0
90
92
94
80
3743 TA02b
88
86
20 40 60 100
84
82
80
EFFIENCY (%)
V
IN
= 12V
GREEN LED
Efficiency (Stepping from 2A to 20A)