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參數(shù)資料
| 型號： | TPS2492PW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| 封裝： | GREEN, PLASTIC, TSSOP-14 |
| 文件頁數(shù)： | 10/33頁 |
| 文件大小： | 1096K |
| 代理商： | TPS2492PW |
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SLUSA65A – JULY 2010 – REVISED AUGUST 2010
www.ti.com
The TPS2492/93 responds rapidly to a short circuit as seen in Figure 17. The falling OUT voltage is the result of
the external FET and CO currents through the short circuit impedance. The internal GATE clamp causes the
GATE voltage to follow the output voltage down and subsequently limits the negative VGS. The IIN waveform
includes current into an input 47 F capacitor. M1 drain current has a peak value in excess of the waveform, and
terminates when VGATE approaches VOUT. The rapidly rising fault current overdrives the GATE amplifier causing it
to overshoot and rapidly turn the external FET off by sinking current to ground. At a time beyond the extent of
Figure 17, but within the scope of Figure 15, the FET will be slowly turned back on as the GATE amplifier
recovers. The operating point will settle to the current or power limit, and finally the TIMER will expire and the
FET will turn off.
Limited input voltage overshoot appears in Figure 17 because a local 47-mF bypass capacitor and 1000 mF
distribution capacitor were used. The input voltage overshoots as the input current abruptly drops due to the
stored energy in the input wiring inductance. The exact waveforms seen in an application depend upon many
factors including parasitics of the voltage distribution, circuit layout, and the short itself.
Figure 17. Current Limit Onset
18
Copyright 2010, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2492PW | 制造商:Texas Instruments 功能描述:HOT SWAP CONTROLLER IC 80V TSSOP-14 |
| TPS2492PWR | 功能描述:熱插拔功率分布 Pos Hi-Vltg Pwr-Ltd Hotswap 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 |
| TPS2493EVM-002 | 功能描述:電源管理IC開發(fā)工具 TPS2493 Hot Swap ontroller 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 |
| TPS2493EVM-004 | 功能描述:電源管理IC開發(fā)工具 TPS2493 Hot Swap ontroller 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 |
| TPS2493PW | 功能描述:熱插拔功率分布 Pos Hi-Vltg Pwr-Ltd Hotswap 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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