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參數(shù)資料
| 型號： | AN-20 |
| 英文描述： | Transient Suppression Techniques for TOPSwitch Power Supplies |
| 中文描述： | 暫態(tài)的TOPSwitch電源抑制技術(shù) |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 112K |
| 代理商： | AN-20 |
A
6/96
AN-20
5
Figure 8. Modified ST202A Power Supply, 3-Wire Input.
Figure 8 shows a typical 3-wire modification to the ST202A
TOPSwitch
power supply. The earth ground wire is threaded
through a ferrite bead or toroid to damp power cord resonances
(see AN-15). Because of the connection to earth ground, C8 no
longer needs to be a Y-capacitor but can be replaced with a
simple, general purpose and low cost ceramic 0.1 uF capacitor.
C7, C8, and C11 must have very short leads and be connected
with short, wide traces.
PI-1708-120495
7.5 V
RTN
C5
47
μ
F
D2
UG8BT
R2
68
R6
270
to 620
VR2
1N5995B
6.2 V
C3
120
μ
F
25 V
T1
D1
UF4005
C2
680
μ
F
25 V
VR1
P6KE150
BR1
400 V
C1
33
μ
F
400 V
C11
2.2 nF
Y2
R1
39
U2
NEC2501-H
U1
TOP202YAI
DRAIN
SOURCE
CONTROL
C4
0.1
μ
F
L1
3.3
μ
H
F1
3.15 A
J1
C6
0.1
μ
F
X2
L2
22 mH
L
N
T1202
1
8
2
7
3
4
C8
0.1
μ
F
C7
2.2 nF
Y2
D3
IN4148
BEAD
OR
TOROID
V+
V-
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