LTC3803-3 LINER [Linear Technology], LTC3803-3 Datasheet - Page 14

• Manufacturer Part Number: LTC3803-3
• Description: Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIO S
LTC3803-3
18 V TO 72V
14
V
V
IN
IN
+
–
2.2μF
1
2
3
PDZ6.8B
V
GND
I
TH
FB
220k
/RUN
LTC3803-3
SENSE
GATE
MMBTA42
V
IN
V
CC
6
5
4
4:1 Input Range 3.3V Output Isolated Flyback DC/DC Converter
U
0.1μF
4.7k
100k
FDC2512
0.040Ω
84
82
80
78
76
74
72
70
680Ω
BAS516
0
Efficiency vs Load Current
68Ω
150pF
0.1μF
22Ω
1
V
CC
BAS516
6.8k
I
OUT
PS2801-1
2
PA1277NL
•
•
(A)
T1
BAS516
•
3
V
V
1
2
IN
IN
= 48V
= 24V
38033 TA05a
10Ω
BAS516
270Ω
PDS1040
4
V
0.33μF
0.1μF
OUT
+
BAT760
1
2
3
100μF
6.3V
× 3
V
GND
OC
IN
LT4430
COMP
OPTO
FB
38033 TA05
6
5
4
V
3.3V
3A
GND
OUT
22.1k
2.2nF
+
56k
47pF
100k
38033fa
V
OUT
+