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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 6/29頁 |
| 文件大?。?/td> | 578K |
| 代理商： | TPS2340APFPRG4 |
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TPS2340A
SLUS528A MARCH 2002 REVISED AUGUST 2002
14
www.ti.com
APPLICATION INFORMATION
thermal shutdown
Under normal operating conditions, the power dissipation in the TPS2340A is low enough that junction
temperature (TJ) is not more than 15°C above air temperature. However, in the case of a load that exceeds PCI
specifications but remains under the TPS2340A current-limit threshold, power dissipation can be higher. To
prevent any damage from an out-of-specification load or severe rise in ambient temperature, the TPS2340A
contains two independent thermal shutdown circuits, one for each slot’s main supplies.
The highest power dissipation in the TPS2340A is from the 12-V power FET so the TPS2340A temperature
sense elements are integrated closely with these FETs. These sensors indicate when the temperature at these
transistors exceeds approximately 150
°C, either due to average TPS2340A power dissipation, 12-V power FET
power dissipation, or a combination of both.
When excessive junction temperature is detected on one slot, that slot fault latch is set and remains set until
junction temperature drops by approximately 10
°C and the slot is turned off, then on again through the serial
interface. The other slot is not affected by this event. Also, 3.3-Vaux is not affected by thermal events.
digital circuits
The TPS2340A implements two independent slots of hot-plug power management. In addition, the TPS2340A
contains digital circuits to allow communication between these two slots and the system’s hot-plug controller.
Also, the TPS2340A contains inputs for connection to mechanical switches and outputs for driving indicator
LEDs to directly communicate with users and service.
This digital logic implements a serial-to-parallel converter that accepts data from the serial interface and
presents that data to each slot. Data from the serial interface drives the Pwrenx internal main power control
signal. Additional data from the serial interface includes BUSENx and CLKENx outputs to activate bus switches,
RESETx outputs to allow reset to each slot, and ATTLEDx and PWRLEDx outputs to indicate slot status to
users.
The serial-to-parallel converter also accepts data from the slot and sends that data back on the serial interface.
Data to the serial interface includes SWx and BUTTONx switch state, PRSNTnx bits, M66ENx and PCIXCAPx
bits to indicate board type, and internal fault signals Auxfltx and Faultx.
When the digital circuits are operating in normal mode, the serial interface is enabled and controls the slots. The
TPS2340A also operates in various test modes, allowing board testing and system development.
Each TPS2340A controls two PCI/PCIX slots. For systems requiring more than two slots, additional
TPS2340A devices can be cascaded without requiring an additional hot-plug controller. To maintain system
reliability and data integrity at full speed, bus length is often limited to six PCI slots. When higher speed PCIX
protocols are active, bus length may be limited to even fewer active slots. However, the TPS2340A is not limited
in cascade capability or bus length.
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相關(guān)代理商/技術(shù)參數(shù) |
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| TPS2341PHP | 功能描述:IC DUAL SLT PCI PWR CTLR 48HTQFP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| 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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