lt3741 Linear Technology Corporation, lt3741 Datasheet - Page 19

• Manufacturer Part Number: lt3741
• Description: High Power, Constant Current, Constant Voltage, Step-down Controller
• Manufacturer: Linear Technology Corporation

Typical applicaTions
100
95
90
85
80
75
70
0
Efficiency and Power Loss
5
POWER LOSS
vs Load Current
LOAD CURRENT (A)
45.3k
2.2µF
R
10
HOT
EFFICIENCY
50k
R
470k
15
NTC
82.5k
EN/UVLO
20A Super Capacitor Charger with 5V Regulated Output
10nF
V
V
20
IN
OUT
= 20V
3741 TA02b
= 5V
25
EN/UVLO
RT
SYNC
V
CTRL1
CTRL2
SS
REF
30
25
20
15
10
5
0
LT3741
VC
47.5k
V
SENSE
SENSE
CBOOT
CC_INT
4.7nF
GND
SW
V
HG
LG
FB
IN
+
–
100nF
L1: IHLP4040DZER1R0M01
M1: RJK0365DPA
M2: RJK0346DPA
R1: VISHAY WSL25122L500FEA
22µF
33nF
1µF
M1
M2
1.0µH
L1
6
5
4
2
1
0
3
0 2 4 6 8 10 12 14 16 18 20 22 24
100µF
V
V
I
10
LIMIT
2.5m
IN
OUT
R1
= 20V
= 5V
= 20A
V
10V TO 36V
IN
20A MAXIMUM
10
3741 TA02
V
OUT
V
OUT
I
OUT
vs I
38.3k
12.1k
(A)
OUT
150µF
2
3741 TA02c
26
LT3741

3741f