- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384924 > SMM766FCR0 (Summit Microelectronics, Inc.) Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ PDF資料下載
參數(shù)資料
| 型號： | SMM766FCR0 |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| 中文描述： | 六通道有源直流輸出控制器，監(jiān)視器，Marginer和音序器的序列連接⑩ |
| 文件頁數(shù)： | 16/32頁 |
| 文件大?。?/td> | 970K |
| 代理商： | SMM766FCR0 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
SMM766
Preliminary Information
Summit Microelectronics, Inc
2086 2.1 12/13/2005
16
sequence position. Any unused channel should be
assigned to the null sequence position.
ONGOING OPERATIONS-MONITORING MODE
During ongoing operations mode, the part can monitor,
and actively control via ADOC, and use the force-
shutdown operation if necessary.
Once the power-on sequence is complete, depending
on the user programmed settings; the SMM766 will
either enter the ongoing operations mode directly or
wait for ADOC to successfully bring all channels within
their nominal values. The ongoing operations mode
will end when a power-off sequence, or force-
shutdown has been initiated.
Once the ongoing operations mode has begun, the
SMM766 continues to monitor all VM
X
inputs, the VDD
and 12VIN inputs, and two temperature sensor inputs
with a 10-bit ADC. Each of these inputs is sampled
and converted by the ADC every 2ms. The ADC input
has a range of 0V to four times the voltage on VREF
for inputs VM
A-F
and the VDD input. The range is
extended to 12 times VREF for the 12VIN input and is
reduced to two times VREF for the AIN1 and AIN2
inputs.
The SMM766 monitors internal temperature using the
10-bit ADC and the automonitor function. Two under-
temperature and two over-temperature thresholds can
be set, each with its own programmable threshold
options and consecutive conversion, before trigger
counter. Resolution is 0.25 C per bit scaled over the
range of -128 C to 127.75 C. The temperature value
can be acquired over the I
2
C bus as a 10-bit signed
two's complement value.
The
SMM766
compares
conversion with two programmable 10-bit under-
voltage limits (UV1, UV2) and two programmable 10-
bit
over-voltage
limits
corresponding input. A consecutive conversion
counter is used to provide filtering of the ADC inputs.
Each limit can be programmed to require 1, 2, 4 or 6
consecutive out-of-limit conversions before it is said to
be in fault. One in-limit conversion will remove the
fault from the threshold limit. This provides digital
filtering of the monitored inputs. The ADC inputs VM
A-F
can use additional filtering by connecting a capacitor
from the corresponding CAP
X
pins to ground to form
an analog RC filter (R=25k
). The input is considered
to be in a fault condition if any of its limit thresholds
are in fault. Setting an OV threshold limit to full-scale
(3FF
HEX
), or setting a UV threshold limit to 000
HEX
,
ensures that the limit can never be in fault. The status
each
resulting
ADC
(OV1,
OV2)
for
the
registers provide the real-time status of all monitored
inputs.
The voltage threshold limits for inputs VM
A-F
, VDD and
12VIN can be programmed to trigger the RST# and
HEALTHY outputs as well as a Fault-Triggered force-
shutdown and power-off operation when exceeded.
The threshold limits for the internal temperature
sensor and the AIN1 and AIN2 inputs can be
programmed to assert the RST#, HEALTHY, and
FAULT# output pins
The HEALTHY and FAULT# outputs of the SMM766
are active as long as the monitored threshold remains
in violation. The RST# output also remains active as
long as the monitored threshold remains in violation.
However, once the threshold violation goes away, the
RST# will remain active for a programmable reset
timeout period (t
PRTO
).
The SMM766 treats Command-Triggered force-
shutdown and power-off operations, those
caused by
I
2
C commands and assertion of the FS# and
PWR_ON pin, differently than those caused by a
Fault-Triggered
forced-shutdown
conditions, those caused by UV/OV violations or a
sequence termination timer expiration. The mode in
which either a Forced Shutdown or a power-off occurs
effects how or whether the SMM766 will restart, and
the number of allowable retries permited.
TEMPERATURE SENSOR ACCURACY
The internal temperature sensor accuracy is ±5
o
C from
-40 to +85
C. The sensor measures the temperature
of the SMM766 die and the ambient temperature. If
VDD is at 5V, the die temperature is +2
o
C and at 12V,
it is +4
o
C. In order to calculate this difference in
specific applications, measure the VDD or 12VIN
supply current and calculate the power dissipated and
multiply by 80
C/W. For instance, 5V and 5mA is
25mW, which creates a 2
o
C offset.
MARGINING
The SMM766 has two additional ADOC voltage
settings for channels A-F, margin high and margin low.
The margin high and margin low voltage settings can
range from 0.3V to VDD of the converters’ nominal
output voltage, depending on the specified margin
range of the DC-DC converter. These settings are
stored in the configuration registers and are loaded
into the ADOC voltage setting by margin commands
issued via the I
2
C bus. The channel must be enabled
for ADOC in order to enable margining. The margin
command registers contain two bits for each channel
and
power-off
APPLICATIONS INFORMATION (CONTINUED)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SMM766FCR1 | Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR2 | Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR3 | Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR4 | Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR5 | Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SMM766FCR1 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR2 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR3 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR4 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| SMM766FCR5 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。