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)計應(yīng)用指南
文件頁數(shù): 28/64頁
文件大?。?/td> 1056K
代理商: 21103
18
Decoupling and Layout Recommendations
AMD-K6
Processor Power Supply Design
21103G/0—February 1999
Figure 9. Bulk Decoupling versus Output Voltage Response for 2.4 V @15 A
Output Voltage Response Measurement Techniques
To measure output voltage response, run a program such as DOS
EDIT and toggle STPCLK# every 40
μ
sec or slower. (AMD has
developed the Maxpwr99.exe utility
. See “Output Voltage
Response Measurement Utility” on page 19 for more
information.) Measure the voltage at the back of the board right
under the processor. Use a scope probe with a ground
connection next to the tip. The 3 inch to 6 inch ground leads
that come off the side of a scope probe have too much
inductance for this type of measurement. The scope bandwidth
can be limited to 20MHz, giving a clear indication of the power
supplied. While limiting the scope bandwidth for bulk
decoupling verification gives a clear indication of the
low-frequency issues, AMD recommends rechecking with at
least a 250MHz bandwidth for verifying the high-frequency
decoupling.
Output Voltage vs Capacitance
1.7
1.75
1.8
1.85
1.9
1.95
2
2.05
2.1
2.15
2.2
2.25
2.3
2.35
2.4
470
940 1410 1880 2350 2820 3290 3760 4230 4700 5170 5640 6110
Capacitance in micro Farads
V
Voltage
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