參數(shù)資料
型號(hào): AN-32
英文描述: TOPSwitch-GX Flyback Design Methodology
中文描述: 的TOPSwitch - GX系列反激式設(shè)計(jì)方法
文件頁(yè)數(shù): 7/16頁(yè)
文件大?。?/td> 134K
代理商: AN-32
AN-32
7
B
12/02
Figure 6. Opto/TL431 Feedback Circuit.
P/N
4 Pin DIP
PC123Y6
PC817X1
SFH615A-2
SFH617A-2
SFH618A-2
ISP817A
LTV817A
LTV816A
LTV123A
K1010A
6 Pin DIP
LTV702FB
LTV703FB
LTV713FA
K2010
PC702V2NSZX 63-125
PC703V2NSZX 63-125
PC713V1NSZX 80-160
PC714V1NSZX 80-160
MOC8102
MOC8103
MOC8105
CNY17F-2
CTR(%) BVCEO
Manufacturer
80-160
80-160
63-125
63-125
63-125
80-160
80-160
80-160
80-160
60-160
70 V
70 V
70 V
70 V
55 V
35 V
35 V
80 V
70 V
60 V
Sharp
Sharp
Vishay, Isocom
Vishay, Isocom
Vishay, Isocom
Vishay, Isocom
Liteon
Liteon
Liteon
Cosmo
63-125
63-125
80-160
60-160
70 V
70 V
35 V
60 V
70 V
70 V
35 V
35 V
30 V
30 V
30 V
70 V
Liteon
Liteon
Liteon
Cosmo
Sharp
Sharp
Sharp
Sharp
Vishay, Isocom
Vishay, Isocom
Vishay, Isocom
Vishay, Isocom,
Liteon
73-117
108-173
63-133
63-125
Table 3. Optocoupler
Step 3. Determine minimum and maximum DC input
voltages V
, V
and input storage capacitance C
IN
based
on AC input voltage and P
O
(Figure 7)
Choose input storage capacitor, C
IN
per Table 4.
Input (VAC)
C
IN
(
μ
F/Watt of P
O
) V
MIN
(V)
Universal
2 ~ 3
90
230 or 115 with doubler
1
240
Table 4
Set bridge rectifier conduction time, t
C
= 3 ms.
Derive minimum DC input voltage V
MIN
where units are volts, watts, Hz, seconds and farads
Calculate maximum DC input voltage V
MAX
:
V
V
MAX
ACMAX
=
×
2
V
V
P
f
t
C
MIN
ACMIN
O
L
C
IN
=
×
×
×
×
×
(
)
2
2
1
2
2
η
PI-3329-112202
D
S
C
TOPSwitch-GX
L
CONTROL
+
-
F
X
V
AC
C
IN
TL431
UTV817A
V
O
470
(
V
O
= 12 V)
100
(
V
O
= 5 V)
1 k
3.3 k
100 nF
10 k
R =
V
O
- 2.5
2.5
X10
k
Feedback Circuit
+
CIRCUIT PERFORMANCE
Circuit Tolerance
±
1%
Load Regulation
±
0.2%
Line Regulation
±
0.2%
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