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): 47/64頁
文件大?。?/td> 778K
代理商: MPM22CUC450B
Pentium
III Processor Mobile Module MMC-2
245304-004
Datasheet
45
Figure 13. Overvoltage Lockout
The LM339 comparator is an open-collector output and is pulled low when the applied voltage at
V_DC is too high, thus disabling the Slew-rate circuit.
The model in Figure 14 below will be used for component calculations.
Figure 14. Overvoltage Lockout Model
Assume that the desired V_DC Overvoltage Lockout is 21.0V. Using Equation 24, the input to the
non-inverting input of the OV Lockout comparator can be calculated with the following equations.
Overvoltage Lockout
M3 Gate
V_DC_A
R4
2.5V
V_DC
LM339
R27
R23
R24
R26
Vref
Let R4=100K
Let R24=100K
Let R26=1M
Let R27=1K
Overvoltage Lockout Model
Vinv
R23
R24
V_DC
Vref
Vnoninv
V_DC_A
R27
R26
R4
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