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參數(shù)資料
| 型號： | MIC2341-5YTQ |
| 廠商： | MICREL INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48 |
| 封裝： | LEAD FREE, TQFP-48 |
| 文件頁數(shù)： | 18/32頁 |
| 文件大?。?/td> | 1277K |
| 代理商： | MIC2341-5YTQ |
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Micrel, Inc.
MIC2341/2341R
October 2007
25
M9999-102507-A
(408) 944-0800
ONA
AUX
ENA
/CRS
WA
/FORCE_ONA
12V
OU
T
MA
IN
A
3V
OUT
MAIN
A
VAU
X
A
ONB
AUX
ENB
/CRS
WB
/FORCE_ONB
12V
OU
T
MA
IN
B
3V
OUT
MAIN
B
VAU
X
B
SY
SP
WRG
D
1
X
0
1
UV
X
0
1
X
0
1
X
UV
X
0
X
1
0
1
X
UV
X
0
X
1
X
0
1
UV
X
0
X
1
X
0
1
X
UV
X
0
X
1
0
1
X
UV
0
where “1” = Logic HIGH
“0” = Logic LOW
“X” = Don’t care
Table 1. SYSPWRGD Truth Table
Hardware Interface
Once the input power supply voltages are above their
respective UVLO thresholds, the MIC2341/MIC2341R’s
hardware interface can be enabled for power control by
asserting
the
control
input
pins
(/CRSW[A/B],
AUXEN[A/B], and ON[A/B]) appropriately for each slot.
The MIC2341/MIC2341R’s ON[A/B] and AUXEN[A/B]
signals are asserted active-HIGH, level-sensitive digital
inputs with internal pull-up 45k
resistors to VSTBY[A]
to save pc board area and external component costs. As
such, external hot-plug controllers connecting to these
pins should configure their respective output drivers to
OPEN-DRAIN and configure their firmware to de-assert
these signals to turn OFF either the MAIN[A/B] outputs
or the VAUX[A/B] outputs. As these input control signals
are already asserted after POR, the corresponding
/CRSW[A/B] control signal should be used to enable the
slot’s gate drive circuits to initiate a power-up sequence.
For example, in order for the MIC2341/MIC2341R to
switch
on
the
VAUX
supply for
either
slot,
the
AUXEN[A/B] control can be enabled during or after the
power-on-reset operation (typically, tPOR = 160
s. The
timing response diagram of Figure 9 illustrates the
hardware interface operation where an overcurrent fault
is detected by the MIC2341/MIC2341R controller after
initiating a power-up sequence. The MAIN (+12V &
+3.3V) and VAUX[A/B] supply rails, /FAULT, /PWRGD
and /INT output responses for both AUX and MAIN are
shown in the figure.
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| MIC2341R-2YTQ TR | 功能描述:熱插拔功率分布 Dual -Slot PCI Express Hot-Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2342-2YTQ | 功能描述:熱插拔功率分布 Dual -Slot PCI Express Hot-Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2342-2YTQ TR | 功能描述:熱插拔功率分布 Dual -Slot PCI Express Hot-Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2342R-2YTQ | 功能描述:熱插拔功率分布 Dual -Slot PCI Express Hot-Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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