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參數(shù)資料
| 型號： | SMM665BFR7 |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| 中文描述： | 六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> | 872K |
| 代理商： | SMM665BFR7 |
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SMM665B
Preliminary Information
Summit Microelectronics, Inc
2089 1.1 10/20/04
18
RESTART
SEQUENCING
OF
POWER-ON
CASCADE
Once a Force Shutdown or Power-off operation has
completed, the SMM665B 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
SMM665B 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
SMM665B 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
SMM665B internal UVLO (UnderVoltage LockOut)
circuit resets all internal logic. Once power has
recovered above 2.6V the SMM665B will restart
assuming the PWR_ON/OFF pin is in the asserted
state or an I
2
C power command is issued. The
SMM665B 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)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SMM665BFR8 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SMM665BFR9 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
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| SMM665C_11 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer |
| SM-M7-00-UF | 功能描述:射頻模塊 M7 UHF MODULE RoHS:否 制造商:Linx Technologies 產(chǎn)品:Transceiver Modules 頻帶:902 MHz to 928 MHz 輸出功率:- 15.5 dBm to + 12.5 dBm 接口類型:UART 工作電源電壓:- 0.3 VDC to + 5.5 VDC 傳輸供電電流:38.1 mA 接收供電電流:22.7 mA 天線連接器類型:U.FL 最大工作溫度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm |
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