這個是舊款的 AT 開關式電源器 SPS（Switching Power Supply），新的 PC 電源輸出的插頭已經改了為 Molex MiniFit 20Pin，所以已經沒有使用，但拆解後，發現它的用料很好，日本電容，而且生產工藝都很仔細，台灣的生產廠商 FORTREX，專業生產電源供應器（Power Supply）。
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| COS AT 開關式電源器的 PCB板 |
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| COS AT 開關式電源器 PCB板的正面 |
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| COS AT 開關式電源器 PCB板的背面 |
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| COS AT 開關式電源器 PCB板的側面 |
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| COS AT 開關式電源器 PCB板 |
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| IC1 Motorola TL494CN |
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| IC2 BA10339 |
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| COS AT 開關式電源器的輸出插頭 |
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| AT 標準 P8和 P9插頭 |
P8 AT
Power Supply Connector：
Pin
|
Name
|
Color
|
Description
|
|
1
|
PG
|
Orange
|
Power
Good, +5 VDC when all voltages have stabilized.
|
|
2
|
+5V
|
Red
|
+5
VDC (or n/c)
|
|
3
|
+12V
|
Yellow
|
+12
VDC
|
|
4
|
-12V
|
Blue
|
-12
VDC
|
|
5
|
GND
|
Black
|
Ground
|
|
6
|
GND
|
Black
|
Ground
|
P9 AT
Power Supply Connector：
Pin
|
Name
|
Color
|
Description
|
|
1
|
GND
|
Black
|
Ground
|
|
2
|
GND
|
Black
|
Ground
|
|
3
|
-5V
|
White
or Yellow
|
-5
VDC
|
|
4
|
+5V
|
Red
|
+5
VDC
|
|
5
|
+5V
|
Red
|
+5
VDC
|
|
6
|
+5V
|
Red
|
+5
VDC
|
產品 PCB 板主要零件（BOM）：
Type
|
Brand
|
P/N
|
Packaging
|
IC1 - Switchmode Pulse Width Modulation Control
Circuits
|
Motorola
|
TL494CN
|
DIP-16
|
IC2 - Quad Comparator
|
Rohm
|
BA10339
|
DIP-14
|
IC3 - 3-Terminal Voltage Regulators
|
Motorola
|
7905CT
|
TO-220
|
Q1 - High Voltage Fast-Switching NPN Power Transistor
|
?
|
C4242
|
TO-220
|
Q2 - High Voltage Fast-Switching NPN Power Transistor
|
?
|
C4242
|
TO-220
|
D13 – Schottky Barrier Rectifiers (15A,70-100V)
|
MOSPEC
|
S15D40C
|
TO-247
|
D14 – Fast Recovery Rectifiers (6.0A,50-200V)
|
MOSPEC
|
F06C20C
|
TO-220
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Connector 連接器：
Type
|
Brand
|
Description
|
Qty
|
AT Power (P8/P9)
|
Molex
|
WTB Molex 90331 6Pin
|
2
|
3.5”Floppy Disk
|
?
|
WTB 4P
|
3
|
2.5”Floppy Disk
|
?
|
WTB 4P
|
1
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