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參數資料
| 型號： | Celeron Processor with mobile |
| 廠商： | Intel Corp. |
| 英文描述： | Celeron Processor Mobile Module MMC-1 at 400 MHz, 366 MHz, 333 MHz, and 300 MHz(工作頻率400,366,333,300和266兆赫茲帶移動模塊和連接器1處理器) |
| 中文描述： | 賽揚處理器的移動模塊絲裂霉素在400兆赫，366兆赫，333兆赫和300兆赫1（工作頻率四千〇三億六千六百三十三萬三千三百和266兆赫茲帶移動模塊和連接器1處理器） |
| 文件頁數： | 33/42頁 |
| 文件大小： | 449K |
| 代理商： | CELERON PROCESSOR WITH MOBILE |
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33
Intel
a
Celeron
Processor Mobile Module MMC-1
At 400 MHz, 366 MHz, 333 MHz, and 300 MHz
Figure 9 shows a SPICE simulation of the circuit in Figure 8.
To increase the reliability of the Tantalum capacitors, use a
slew-rate control circuit as described in Figure 8 and voltage
derate the capacitor about 50 percent. For example, for a
maximum input voltage of 18 volts, use a 35-volt, low ESR
capacitor with high ripple current capability. Place five, 22-
microfarad/35-volt capacitors on the baseboard directly at
the V_DC pins of the connector.The slew-rate control circuit
should also be applied to every input power source to the
system V_DC to provide the most protection. If all power is
logically “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 volts at PWR), and the AC
Adaptor (18 volts) 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.
Figure 9. Spice Simulation Using In-rush Protection (Example Only)
4.7.4.2
Undervoltage Lockout: Circuit Description
(V_uv_lockout)
The circuit shown in Figure 8 provides an undervoltage
protection and locks out the applied voltage to module to
prevent an accidental turn-on at low voltage. The output of
this circuit, pin 1 of the LM339 comparator, is an open-
collector output. It is low when the applied voltage at PWR is
less than 4.75 volts. This voltage can be calculated with the
following equation with the voltage across D7 as 2.5 volts
(D7 is a 2.5-volt reference generator).
V_uv_lockout
Vre.
R17
R18.
R18
R25
=
V_uv_lockout
4.757 volts
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