參數(shù)資料
型號: MPM22CUC450B
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 450 MHz, MICROPROCESSOR, XMA
封裝: MMC-2
文件頁數(shù): 46/64頁
文件大?。?/td> 778K
代理商: MPM22CUC450B
Pentium
III Processor Mobile Module MMC-2
44
Datasheet
245304-004
Figure 12. Undervoltage Lockout Model
VCEsat is the saturation voltage of the comparator output transistor.
The comparator trip point voltage can be calculated with Equation 21.
Equation 21.
If power to the mobile module is to be held off until V_DC exceeds 7.5V, Equation 21 can be
rearranged to solve for R18.
Equation 22.
A value for R18 can be determined by plugging these values into Equation 23.
Equation 23.
R18 = 11.0 k
(4.99 k
is a standard 1% resistor value, which would provide lockout below 7.532V.)
5.3.4.7
Overvoltage Lockout
The mobile module operates with a maximum input voltage of 21.0V. This circuit can be set to lock
out the input voltage if it exceeds the desired input.
Undervoltage Lockout Model
+
VCEsat
2.5V
V_DC
R25
R18
R17
V_DC_UVlock
Vref
R18
Vref
VCEsat
R25
R17
R18
Vref R17
.
R25
.
R25 V_DC_UVlock Vref
()
.
R17 Vref
VCEsat
()
.
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