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參數(shù)資料
| 型號： | 21103 |
| 英文描述： | AMD-K6 Processor Family Thermal Solutions Application Note AMD-K6 Processor Power Supply Design Application Note |
| 中文描述： | 的AMD - K6處理器系列散熱解決方案應(yīng)用指南的AMD - K6處理器電源設(shè)計(jì)應(yīng)用指南 |
| 文件頁數(shù)： | 16/64頁 |
| 文件大?。?/td> | 1056K |
| 代理商： | 21103 |
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6
Processor Power Requirement
AMD-K6
Processor Power Supply Design
21103G/0—February 1999
switch in conjunction with the output capacitor (C
O
) to control
the ON/OFF ratio in order to obtain an average output voltage.
Because the switch turns off frequently, only a small amount of
power is lost during conversion.
Figure 2. Linear and Switching Voltage Regulators
As the trend toward smaller process geometries continues
(0.35-micron to 0.25-micron), the processor core voltage will
continue to drop. To provide maximum flexibility for upgrading
a motherboard, regulator controllers with the 5-bit VID code
are preferable. Using this feature, processors that have not yet
been announced can be supported, as long as they do not
exceed the current limit of the design. Designing a point
solution (such as, 2.9V @ 7.5A) eliminates many design
variables, however, this approach limits flexibility and
upgradeability.
There are two strategies for extending the life of a motherboard
while retaining low cost. The first strategy entails designing the
board for the maximum current anticipated. This approach
increases the cost because the components used are more
expensive and may be physically larger, therefore occupying
more room. The second strategy entails the development of two
designs
—one that operates at 10A and one that operates at
15A. The motherboard can be laid out to accept components for
+
–
R
L
Control
V
IN
V
OUT
+
–
Feedback
Efficiency
=
V
OUT
V
IN
+
–
R
L
V
IN
V
OUT
+
–
Switching Regulator
Linear Regulator
C
O
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