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參數(shù)資料
| 型號： | Pentium II 266 |
| 廠商： | Intel Corp. |
| 英文描述： | 32-Bit Processor With Low-Power Module(帶低能量模塊的32位處理器) |
| 中文描述： | 32位處理器低功率模塊（帶低能量模塊的32位處理器） |
| 文件頁數(shù)： | 35/50頁 |
| 文件大?。?/td> | 1003K |
| 代理商： | PENTIUM II 266 |
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Pentium
II Processor – Low-Power Module
Datasheet
35
Figure 8 shows a SPICE simulation of the circuit in Figure 10.
To increase the reliability of Tantalum capacitors, use a slew rate control circuit described in
Figure 7 and voltage-derate the capacitor about 50 percent. That is, for a maximum input voltage of
18 V, use a 35 V capacitor with low ESR with high ripple current capability.
On the base board, place five 22 μF/35 V capacitors directly at the V_DC pins of the processor
module connector. An acceptable capacitor for this application would be the component from
AVX: TPSE226K035R0300.
One more issue that must be raised here is that the Slew Rate Control circuit should be applied to
every input power source to the system V_DC to provide the most protection. If all power sources
(i.e., battery or batteries, AC Adaptor, etc.) are OR’ed together at the PWR node, there is still a
potential problem. For example, if a 3X3 Li-Ion battery pack is powering the system (12 V at
PWR), and the AC Adaptor (18 V) is plugged into the system, it will immediately source current to
the PWR node and V_DC rapidly. This is because the Slew Rate Control is already ON. Therefore,
the slew rate control must be applied to every input power source to provide the most protection.
Also shown in Figure 10 are under and over voltage and over-current protection circuits that can be
used to increase the protection level for the module.
Figure 8. Spice Simulation Using In Rush Protection
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