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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)： | 16/32頁 |
| 文件大小： | 1277K |
| 代理商： | MIC2341-5YTQ |
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Micrel, Inc.
MIC2341/2341R
October 2007
23
M9999-102507-A
(408) 944-0800
Figure 7. MIC2341R Auto-Retry Timing Diagram and Operation in Current-limit
Thermal Shutdown
The internal VAUX[A/B] MOSFETs are protected against
damage
not
only
by
current
limiting,
but
by
overtemperature
protection
as
well.
Should
an
overcurrent condition on either VAUX[A] or VAUX[B]
raise the junction temperature of the MIC2341 to 140°C,
all of the outputs for that corresponding slot (including
VAUX) will be shut off and that slot’s /FAULT_AUX
output will be asserted. The slot’s /FAULT_MAIN output
will not be asserted. The other slot’s operating condition
will remain unaffected. However, should the MIC2341’s
die
temperature
exceed
160°C
because
of
an
overcurrent fault condition on both VAUX[A] and
VAUX[B], both slots (all outputs, including VAUXA and
VAUXB)
will
be
shut
off.
In
this
case,
both
/FAULT_AUX[A/B] output signals will be asserted; the
/FAULT_MAIN[A/B] output signals will not be asserted.
Plug-in Card Retention Switch Inputs
Two pins on the MIC2341 are available for use as card
retention switch inputs, /CRSW[A/B]. These pins are
internally pulled-up by 45k
resistors to VSTBY and
prevent the enabling of all gate drive circuits on
12GATE[A/B], 3VGATE[A/B], and VAUX[A/B] unless
these input pins are asserted LOW. In addition, each of
these inputs exhibits an internal debounce delay time of
approximately 10ms.
/FORCE_ON[A/B] Inputs
These level sensitive, asserted active-low digital inputs
are internally pulled up to VSTBY through a weak
current source and are intended for diagnostics during
the debug phase of the system design involving the
MIC2341. In asserting /FORCE_ON[A/B] LOW, all three
of the respective slot’s outputs (+12V, +3.3V, and VAUX)
will turn on. However, all protections for those outputs
are disabled. This explicitly includes all overcurrent and
short circuit protections, and on-chip thermal protection
for the VAUX supplies. Additionally, asserting a slot’s
/FORCE_ON[A/B] input will disable all of its input and
output UVLO protections, with the sole exception of that
asserting either or both of the /FORCE_ON[A/B] inputs
will not disable the VSTBY[A/B] input UVLO.
Asserting
/FORCE_ON[A/B]
LOW
will
cause
the
respective slot’s /PWRGD[A/B], and /DLY_PWRGD[A/B]
output
signals
to
be
asserted
LOW
while
the
/FAULT_MAIN[A/B], the /FAULT_AUX[A/B},
the /INT,
and the SYSPWRGD output signals to enter their open-
drain state.
/PWRGD[A/B] and /DLY_PWRGD Digital Outputs
The MIC2341 has two /PWRGD outputs and two
/DLY_PWRGD outputs, one for each slot. These are
open-drain, active-low outputs that are activated after
power-on-reset and are normally connected by an
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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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