Datasheet

   
     

SLUS168D – APRIL 1999 – REVISED AUGUST 2002
7
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APPLICATION INFORMATION
UDG-00142
UCC3808D-1
RC
4.99 k
Ω
4.99 k
Ω
432
Ω
0.1
µ
F10
µ
F
20 k
Ω
330 pF
86.6 k
Ω
0.01
µ
F
1 kV
N
S1
N
S2
N
P1
N
P2
680
µ
F 0.01
µ
F
470 pF
4700 pF
20 k
Ω
19.1 k
Ω
COMP
19.1 k
Ω
200
Ω
LOOP B
LOOP A
2.2
Ω
0.2
Ω
2 k
Ω
330 pF
1000 pF
62
Ω
62
Ω
1000 pF
2.2
Ω
51 k
Ω
1/4 W
0.47
µ
F4700
µ
F
V
IN
36 V TO 72 V
+
–
BYV
28–200
BYV
28–200
32CTQ030ER28
8:2
+
V
O
5 V 50 W
5678
4321
H11A1
4
5
6
3
2
1
U3
CURRENT
SENSE
PRIMARY
GROUND
–
IRF640
IRF640
20 k
Ω
2N2907
0.1
µ
F
240
Ω
0.1
µ
F
3
1
TL431
2
10
Ω
12
EF25 7
µ
H
1mH
DF02SGICT
2.80 k
Ω
VDD OUTA OUTB GND
RCCSFBCOMP
Figure 2. Typical Application Diagram: 48-V In, 5-V, 50-W Output