Datasheet

17
LT1619
1619fa
Figure 18a. Isolated Local SLIC Power Supply (Flyback) 20W Total Output Power (65V/0.3A or 32.5V/0.6A)
T1
W1
W4
W3
W2
•
•
•
•
10µF
IRLR024N
55V, 0.065Ω
Q
G
= 15nC
330pF
50V
1µF
0.1µF
150µF
20V
SANYO
20SV150M
(OS-CON)
43Ω
MBRS1100T3
1619 F18a
43Ω
1/4W
100Ω
82k
20k
8.1V
10k
S/S
FB
V
C
GND
8
7
6
5
1
2
3
4
V
IN
DRV
GATE
SENSE
1k
1W
1µF
50V
330pF
100V
2.2µF
40V
470pF
2.2µF
40V
–32.5V
–65V
0.22µF
50V
MBRS1100T3
MBRS1100T3
V
IN
10.5V TO
13.7V
0.008Ω
62k
100Ω
6.2V
10k
470Ω
CNY17-3
121Ω
220pF
2.49k
T1
PHILIPS EFD20-3F3-A100-S
CORE SET (0.013" GAP, AI = 100nH/T
2
W4 6T TRIFILAR 28AWG
W1 6T TRIFILAR 28AWG
W3 24T 28AWG
W2 24T 28AWG
2mil
POLYESTER
FILM
LT1619
LT1431
1
2
3
4
8
7
6
5
COLL
NC
V+
NC
REF
NC
FGND
SGND
LOAD CURRENT (mA)
10
50
EFFICIENCY (%)
60
70
90
100 1000
1619 F18b
80
55
65
85
75
V
IN
= 13.7V
V
IN
= 12V
V
IN
= 10.5V
Figure 18b. Efficiency of the Isolated Local SLIC (Flyback)
TYPICAL APPLICATIO S
U