參數(shù)資料
型號(hào)： AN-15
英文描述： TOPSwitch Power Supply Design Techniques for EMI & Safety
中文描述： 的TOPSwitch電源電磁干擾設(shè)計(jì)技術(shù)
文件頁(yè)數(shù)： 26/36頁(yè)
文件大?。?/td> 381K
代理商： AN-15
AN-15
A
6/96
26
Figure 45 shows a typical 2 wire implementation with the
enclosure shield connected to secondary RTN which places the
enclosure at SELV potential. PC board creepage distance
between primary circuits and the SELV shielded enclosure
must meet reinforced insulation requirements. The enclosure is
AC coupled with a small Y1-capacitor (C7) back to primary
circuitry. Another common approach is to use a series
combination of two Y2-safety capacitors which meets electrical
safety requirements because each capacitor will safely limit
fault current to under 250
μ
A (IEC950 limit for two wire, 250
VAC) if the other capacitor fails short.
PI-1656-111695
7.5 V
RTN
C5
47
μ
F
D2
UG8BT
D3
1N4148
R2
68
VR2
1N5995B
6.2 V
C3
120
μ
F
25 V
T1
D1
UF4005
C2
680
μ
F
25 V
VR1
P6KE200
BR1
400 V
C1
33
μ
F
400 V
R1
39
U2
NEC2501-H
U1
TOP202YAI
DRAIN
SOURCE
CONTROL
C4
0.1
μ
F
C7
1.0 nF
Y1
L1
3.3
μ
H
F1
3.15 A
J1
C6
0.1
μ
F
X2
L2
22 mH
L
N
1
V+
V-
8
2
7
3
4
Figure 45. Typical 2-Wire TOPSwitch Power Supply and EMI Filter with SELV Connected Shield.
相關(guān)PDF資料
PDF描述
AN-16 TOPSwitch Flyback Design Methodology
AN-17 Flyback Transformer Design for TOPSwitch Power Supplies
AN-18 TOPSwitch Flyback Transformer Construction Guide
AN-19 TOPSwitch Flyback Power Supply Efficiency
AN-20 Transient Suppression Techniques for TOPSwitch Power Supplies
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