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參數(shù)資料
| 型號(hào)： | Intel Celeron Processor |
| 廠商： | Intel Corp. |
| 英文描述： | Intel Celeron Processor Mobile Module MMC-2 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(dòng)模塊和連接器2處理器) |
| 中文描述： | 英特爾賽揚(yáng)處理器的移動(dòng)模塊絲裂霉素在400兆赫，366兆赫，333兆赫和300兆赫2（工作頻率400366333300和266兆赫茲帶移動(dòng)模塊和連接器2處理器） |
| 文件頁(yè)數(shù)： | 37/47頁(yè) |
| 文件大小： | 414K |
| 代理商： | INTEL CELERON PROCESSOR |
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Intel
a
Celeron
Processor Mobile Module MMC-2
at 400 MHz, 366 MHz, 333 MHz, and 300 MHz
37
Figure 8 shows a SPICE simulation of the circuit in Figure 7.
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 18.0 volts, use a 35.0-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 processor module connector. Finally, the slew-rate
control circuit should be applied to every input power source
to the system V_DC to provide the most protection. A
potential problem still exists if all power sources are “l(fā)ogically
OR’ed” together at the PWR node. For example, the system
will immediately source current to the PWR node and V_DC
if a 3X3 Li-Ion battery pack is powering the system (12.0
volts at PWR) and the AC Adaptor (18.0 volts) is plugged
into the system. 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 the Celeron
processor mobile module MMC-2 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 volt
4.7.4.3
Overvoltage Lockout: Circuit Description
(V_ov_lockout)
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