參數(shù)資料
型號(hào)： TPS2341PHPR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源管理
英文描述： 4-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48
封裝： POWERPAD, HTQFP-48
文件頁(yè)數(shù)： 5/31頁(yè)
文件大?。?/td> 649K
代理商： TPS2341PHPR
TPS2341
SLUS513A MAY 2003 REVISED JULY 2004
13
www.ti.com
APPLICATION INFORMATION
The functional block diagram shows the TPS2341 with detailed information on the analog functions. For clarity,
the analog circuits for only one slot are shown in detail.
+12-V Supply Control
The TPS2341 integrates an N-channel power MOSFET for the +12-V supply between pins P12VINA and
P12VOA. The switch has a nominal on resistance of 180 m
and shuts down the slot upon detecting an
overcurrent condition. The in-rush current of the supply is controlled in an open-loop fashion by charging an
external capacitor tied directly to the internal N-channel MOSFET gate with a constant current source. This
results in a linear voltage ramp on the gate and also on the P12VOA output due to the source follower connection
of the switch.
The switch turns on when the logic declares the input supplies are valid, slot is healthy and the enable from the
I2C serial interface is active. The P12VOA output voltage is monitored for an undervoltage fault once the +12-V,
+5-V and +3.3-V switches are fully enhanced. The switch shuts off upon a disable command from the I2C serial
interface or a fault on the slot. An internal resistor connects between the P12VOA and PWRGND1 upon disable
and bleeds off any residual charge on the output.
Slot B functions independently and in the same manner as slot A with the input supply connected to P12VINB
and the load connected to P12VOB.
12-V Supply Control
The TPS2341 integrates an N-channel power MOSFET for the 12-V supply between pins M12VINA and
M12VOA. The switch has a nominal on resistance of 500 m
and shuts down the slot upon detecting an
overcurrent condition. The in-rush current of the supply is controlled in a closed-loop fashion by charging an
external Miller capacitor tied between the N-channel MOSFET gate and drain with a constant current source.
This results in a linear voltage ramp on the drain (M12VOA) pin.
The switch turns on when the logic declares the input supplies are valid, slot is healthy and the enable from the
I2C serial interface is active. The M12VOA output voltage is not monitored for an undervoltage fault. The switch
shuts off upon a disable command from the I2C serial interface or a fault on the slot. An internal resistor connects
between the M12VOA and PWRGND1 upon disable and bleeds off any residual charge on the output.
Slot B functions independently and in the same manner as slot A with the input supply connected to M12VINB
and the load connected to M12VOB.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
TPS2342PFPRG4 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
TPS2343DDP 功能描述:熱插拔功率分布 Dual Slot PCI-X 2.0 Hot-Plug Pwr Cntrlr 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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