參數(shù)資料
型號(hào)： TPS2340APFPRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP80
封裝： GREEN, PLASTIC, HTQFP-80
文件頁(yè)數(shù)： 5/29頁(yè)
文件大?。?/td> 578K
代理商： TPS2340APFPRG4
TPS2340A
SLUS528A MARCH 2002 REVISED AUGUST 2002
13
www.ti.com
APPLICATION INFORMATION
fault handling
When PGOOD is asserted (main power is valid), the serial interface is available for use. At this time, Auxflt and
Faultx (i.e. Faultx = Pwrfltx
Auxflt) signals are present in the registers and can be read back over the serial
interface.
When PGOOD is deasserted (main power is not valid), the serial interface is inactive, so the TPS2340A provides
an alternate path for observing the Auxfltx signals. In this case, Auxfltx is presented on the ATTLEDx open-drain
output, so 3Vaux faults can be observed. Systems that do not require Auxfltx indications when main power is
off should use main power to supply current to the attention LEDs.
In addition, when TEST is asserted after PGOOD has changed from 0 to 1, the AND of Pwrfltx and Auxfltx is
present on the ATTLEDx open-drain output, so the attention LEDs can be used to report any faults on each
channel.
After PGOOD is asserted with TEST deasserted and the voltage on the SWx pin is greater than VDIGVCC but
less than VV5IN, ATTLEDx follows the fault status of the main power fault (Pwrfltx). If the SWx input is pulled
to VV5IN potential, that slot becomes immediately enabled independent of serial interface status and ATTLEDx
follows the fault status of the main power fault (Pwrfltx).
Table 1. Fault Reporting Using ATTLED
SWx
PGOOD
TEST
ATTLEDx
< VDIGVCC
0
x
Auxfltx
< VDIGVCC
1
Pwrfltx
Auxfltx
> VDIGVCC, < VV5IN
1
0
Pwrfltx
= VV5IN
x
Pwrfltx
PCIXCAP resolution
Add-in cards indicate their PCI-X mode and frequency capabilities by connection of the PCI-XCAP pin. The
TPS2340A utilizes a three-level comparator to resolve the PCI-XCAP input so as to decode operating mode
and generate the PCI-XCAP2 and PCI-XCAP1 internal signals. With PCI-XCAP open, the TPS2340A selects
PCI-X 133-MHz operation. PCI-X 66-MHz operation is selected by a 10-k
pull-down resistor on PCI-XCAP.
With PCI-XCAP grounded, conventional PCI-2.2 operation is selected. This decoding conforms to the standard
PCI-X specification for PCI-XCAP resolution.
Table 2. PCI-XCAP Pin State Resolution
PCI-XCAP
PCI-XCAP2
PCI-XCAP1
DESCRIPTION
GND
0
Conventional PCI 2.2 operation
10-k
Pull-down Resistor
0
1
PCI-X 66-MHz operation
Open Circuit
1
PCI-X 133-MHz operation
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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TPS2341PHPR 制造商:Texas Instruments 功能描述:PCI HOT PLG PWR CNTRLR 48HTQFP - Tape and Reel
TPS2342PFP 功能描述:熱插拔功率分布 Hot Plug Power 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
TPS2342PFPG4 功能描述:熱插拔功率分布 Hot Plug Power 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
TPS2342PFPR 功能描述:熱插拔功率分布 Hot Plug Power 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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