lt3743 Linear Technology Corporation, lt3743 Datasheet - Page 25

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

TYPICAL APPLICATIONS
2nF
R
45.3k
HOT
R
680k
NTC
82.5k
EN/UVLO
10nF
V
CC_INT
PWM
20k
60.4k
100
EN/UVLO
PWM
CTRL_SEL
RT
SYNC
V
CTRL_H
CTRL_L
CTRL_T
SS
95
90
85
80
75
70
65
60
REF
VCL
0
LT3743
PWMGH
PWMGL
V
SENSE
SENSE
CBOOT
20
24V, 20A 3-LED Driver
VCH
CC_INT
GND
SW
V
HG
LG
24.3k
FB
IN
+
–
4.7nF
DUTY CYCLE (%)
Effi ciency
40
100nF
20μF
1μF
60
V
3 RED LEDs
IN
80
1.2μH
= 24V
3743 TA07b
80μF
100
2.5mΩ
V
24V
IN
500μF
LEDs
RED
20A MAXIMUM
V
OUT
316k
20k
3743 TA07
LT3743
25
3743f