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參數(shù)資料
| 型號： | TPS2458RHBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| 封裝： | PLASTIC, QFP-32 |
| 文件頁數(shù)： | 8/28頁 |
| 文件大?。?/td> | 966K |
| 代理商： | TPS2458RHBT |
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3.3-V Current Limiting
3.3-V Fast Trip Function
3.3-V Current Limit Function
LIMIT
SUM3
650 V
I
R
=
(1)
3.3-V Over-Temperature Shutdown
SLUS916 – FEBRUARY 2009 ............................................................................................................................................................................................ www.ti.com
The 3.3-V management power channel includes an internal pass FET and current sense resistor. The
on-resistance of the management channel — including pass FET, sense resistor, metallization resistance, and
bond wires — typically equals 290 m
and never exceeds 500 m. The AdvancedMC specification allows a
total of 1
between the power source and the load. The TPS2458 never consumes more than half of this
budget.
The 3.3-V fast trip function protects the channel against short-circuit events. If the current through the channel
exceeds a nominal value of 300 mA, then the TPS2458 immediately disables the internal pass transistor and
then allows it to slowly turn back on into current limiting.
The 3.3-V current limit function internally limits the current to comply with the AdvancedMC and MicroTCA
specifications. External resistor RSUM3 allows the user to adjust the current limit threshold. The nominal current
A 3320-
resistor gives a nominal current limit of ILIMIT = 195 mA which complies with AdvancedMC and
MicroTCA specifications. This resistance corresponds to an EIA 1% value. Alternatively, a 3.3-k
resistor also
suffices. Whenever the 3.3-V channel enters current limit, its fault timer begins to operate (see Fault Timer
Programming section).
The 3.3-V over-temperature shutdown trips if the 3.3-V channel remains in current limit so long that the die
temperature exceeds approximately 140 °C. When this occurs, the chip turns off until the it cools by
approximately 10 °C. This feature prevents a prolonged fault on one 3.3-V channel from disabling the other 3.3-V
channel, or disabling the 12-V channel.
16
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS2458
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2458RHBT | 制造商:Texas Instruments 功能描述:Hot Swap Controllers TI |
| TPS2459EVM | 功能描述:電源管理IC開發(fā)工具 Full-Ftd AdvMC Slot Controller Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS2459RHBR | 功能描述:熱插拔功率分布 3V/12V Hot Swap & ORing 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 |
| TPS2459RHBT | 功能描述:熱插拔功率分布 3V/12V Hot Swap & ORing 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 |
| TPS2459RHBT | 制造商:Texas Instruments 功能描述:Hot Swap Controllers TI 制造商:Texas Instruments 功能描述:IC, HOT SWAP & O-RING CTRL, 23V, QFN-32 |
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