Datasheet

LT8302
21
Rev E
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TYPICAL APPLICATIONS
8V to 32V
IN
/12V
OUT
Isolated Flyback Converter
8V to 32V
IN
/3.3V
OUT
Isolated Flyback Converter
Efficiency vs Load Current Load and Line Regulation
AMBIENT TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
3.30
3.40
150
8302 TA03b
3.20
3.10
0
50
100
–25
25
75
125
3.50
3.25
3.35
3.15
3.45
R
TC
= 105k
R
TC
= OPEN
V
IN
= 12V
I
OUT
= 1A
Output Temperature Variation
LOAD CURRENT (mA)
0
65
EFFICIENCY (%)
70
75
80
85
90
95
200 400 600 800 1000
8302 TA02b
1200
V
IN
= 12V
V
IN
= 24V
LOAD CURRENT (mA)
0
11.2
OUTPUT VOLTAGE (V)
11.4
11.6
11.8
12.0
12.2
12.4
200 400 600 800 1000 1200
8302 TA02c
V
IN
= 12V
V
IN
= 24V
V
IN
LT8302
SW
9µH
V
IN
8V TO 32V
T1
1:1
9µH
R
FB
R
REF
C3
470pF
Z1
D1
D2
C1
10µF
C2
1µF
C4
47µF
V
OUT
+
12V
5mA TO 0.8A (V
IN
= 12V)
5mA TO 1.1A (V
IN
= 24V)
V
OUT
–
R3
39Ω
R4
121k
•
•
R6
OPEN
R2
232k
R1
806k
R5
10k
D1: DIODES DFLS1100
D2: DIODES PDS360
T1: SUMIDA 12387-TO79
Z1: CENTRAL CMZ5934B
8302 TA02a
TC
EN/UVLO
GND
INTV
CC
V
IN
LT8302
SW
9µH
V
IN
8V TO 32V
T1
4:1
0.56µH
R
FB
R
REF
C3
470pF
Z1
D1
D2
C1
10µF
C2
1µF
C4
470µF
V
OUT
+
3.3V
20mA TO 2.7A (V
IN
= 12V)
20mA TO 3.8A (V
IN
= 24V)
V
OUT
–
R3
39Ω
R4
140k
•
•
R6
105k
R2
232k
R1
806k
R5
10k
D1: DIODES DFLS1100
D2: DIODES PDS1040L
T1: WURTH 750311625
Z1: CENTRAL CMZ5934B
8302 TA03
TC
EN/UVLO
GND
INTV
CC
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