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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： | 49/68页 |
| 文件大小： | 966K |
| 代理商： | MPM22CGA800A |
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Pentium
III Processor Mobile Module MMC-2
Featuring Intel
SpeedStep Technology
243356-006
Datasheet
47
5.3.4.6
Undervoltage Lockout
The circuit below shows the Undervoltage Lockout portion of the V_DC Supply circuit. This
circuit protects and locks out the applied voltage to the mobile module to prevent an accidental
turn-on at low V_DC supply voltages.
Warning:
A low voltage applied to the mobile module could result in destructive current levels.
Figure 12. Undervoltage Lockout
The output of the LM339 comparator is an open-collector and is low when the applied voltage at
V_DC is less than 7.5V, which holds the Gate of M3 low. Consequently, the Slew Rate Controller
a non-inverting input of the comparator exceeds Vref, 2.5V, the comparator trips and allows its
output to go to a High Z state. The gate of M3 can then be pulled up by R4, starting the controlled
Power-up Slew.
The model in Figure 13 will be used to calculate the Undervoltage Lockout trip point.
Undervoltage Lockout
V_DC_A
R4
M3 Gate
Vref
2.5V
V_DC
LM339
R25
R18
R17
Let V_DC_UVlock=7.5V
Let R17=10 k
Let R25=1 m
Let VCEsat= 0.3V
Let Vref=2.5V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MPM-25S | 制造商:MPD 制造商全称:MicroPower Direct, LLC 功能描述:Universal Input, 25W Miniature, PC Mount AC/DC Power Supplies |
| MPM-25S-05 | 制造商:MPD 制造商全称:MicroPower Direct, LLC 功能描述:Universal Input, 25W Miniature, PC Mount AC/DC Power Supplies |
| MPM-25S-12 | 制造商:MPD 制造商全称:MicroPower Direct, LLC 功能描述:Universal Input, 25W Miniature, PC Mount AC/DC Power Supplies |
| MPM-25S-15 | 制造商:MPD 制造商全称:MicroPower Direct, LLC 功能描述:Universal Input, 25W Miniature, PC Mount AC/DC Power Supplies |
| MPM-25S-24 | 制造商:MPD 制造商全称:MicroPower Direct, LLC 功能描述:Universal Input, 25W Miniature, PC Mount AC/DC Power Supplies |
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