参数资料
型号: MPM22CGA800A
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 800 MHz, MICROPROCESSOR, XMA
封装: MMC-2
文件页数: 51/68页
文件大小: 966K
代理商: MPM22CGA800A
Pentium
III Processor Mobile Module MMC-2
Featuring Intel
SpeedStep Technology
243356-006
Datasheet
49
Figure 14. 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 15 below will be used for component calculations.
Figure 15. 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=100 k
Let R24=100K
Let R26=1 m
Let R27=1 k
Overvoltage Lockout Model
Vinv
R23
R24
V_DC
Vref
Vnoninv
V_DC_A
R27
R26
R4
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