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參數(shù)資料
| 型號(hào)： | SMM465FCR05 |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | 4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| 中文描述： | 4通道有源直流輸出控制器，監(jiān)視器，Marginer和音序器 |
| 文件頁數(shù)： | 18/30頁 |
| 文件大?。?/td> | 957K |
| 代理商： | SMM465FCR05 |
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SMM465
Preliminary Information
Summit Microelectronics, Inc
2085 1.1 05/27/04
18
RESTART OF POWER-ON CASCADE SEQUEN-
CING
Once a Force Shutdown or Power-off operation has
completed, the SMM465 can restart the Power-on
cascade sequencing. The device can be programmed
to automatically restart after a Force Shutdown
provided the PWR_ON/OFF pin remains in the active
state or the I
2
C Power-on command remains in the
command register. If this option is not selected, the
SMM465 requires toggling of the PWR_ON/OFF pin or
toggling of the I
C commands by issuing a Power-off
command and then reissuing the Power-on command
in order to restart Power-on sequencing.
In either case, assertion of the FS pin will prevent the
SMM465 from restarting Power-on sequencing. In
addition, the device can be programmed to check that
VDD and the 12VIN are within their programmed
voltage
thresholds
before
sequencing.
In cases where brownout conditions (Figure 10) or
loss of power are used to cause a sequence off of the
supplies or a Force Shutdown, it is best to toggle the
PWR_ON/OFF pin or use the I
2
C Power commands
restarting
Power-on
after the brownout condition is over or if the supplies
do not fully discharge before initiating a Power-on
sequence.
Recommended Use of the PWR_ON/OFF pin:
The PWR_ON/OFF pin is edge-triggered to lock out
false or nuisance signals during both the power-on
and power-off sequences. If during a system power-
down, whether deliberate or due to a failed power
system, the VDD_CAP voltage falls below 2.5V, the
SMM465 internal UVLO (UnderVoltage LockOut)
circuit resets all internal logic. Once power has
recovered above 2.6V the SMM465 will restart
assuming the PWR_ON/OFF pin is in the asserted
state or an I
2
C power command is issued. The
SMM465 can be used with the PWR_ON/OFF pin
either toggled by a logic level, controlled by a software
command or tied either high or low as described in the
data sheet.
VDD_CAP
2.5V
3.6V, 5.5V
UVLO
(Internal)
2.6V
Figure 10 - Timing Sequence recovering from a VDD_CAP Power ‘Brown-Out’
APPLICATIONS INFORMATION (CONTINUED)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SMM465FR00 | 4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR01 | 4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR02 | 4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR03 | 4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR04 | 4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SMM465FR00 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR01 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR02 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR03 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM465FR04 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
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