參數(shù)資料
型號(hào)： TPS2491DGSR
廠(chǎng)商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10
封裝： GREEN, PLASTIC, MSOP-10
文件頁(yè)數(shù)： 5/24頁(yè)
文件大?。?/td> 534K
代理商： TPS2491DGSR
TIMER
1 V/div
IIN
0.5 A/div
GATE 10 V/div
OUT 10 V/div
t - Time - 2 ms/div
GATE10V/div
VCC10V/div
OUT10V/div
IIN
5A/div
t-Time-500ns/div
SLVS503C
– NOVEMBER 2003 – REVISED SEPTEMBER 2011
Figure 15. Current Limit Overview
The TPS2490/91 responds rapidly to the short circuit as seen in Figure 16. The falling OUT voltage is the result
of M1 and CO currents through the short’s impedance at this time scale. The internal GATE clamp causes the
GATE voltage to follow the output voltage down and subsequently limits the negative VDS to 1–2 V. The rapidly
rising fault current overdrives the GATE amplifier causing it to overshoot and rapidly turn M1 off by sinking
current to ground. M1 slowly turns back on as the GATE amplifier recovers; M1 then settles to an equilibrium
operating point determined by the power limiting circuit.
Figure 16. Current Limit Onset
Minimal input voltage overshoot appears in Figure 16 because a local 100-
μF bypass capacitor and very short
input leads were used. The input voltage would overshoot as the input current abruptly drops in a typical
application due to the stored energy in the input distribution
’s inductance. The exact waveforms seen in an
application depend upon many factors including parasitics of the voltage distribution, circuit layout, and the short
itself.
Copyright
2003–2011, Texas Instruments Incorporated
13
Product Folder Link(s): TPS2490 TPS2491
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2491DGSRG4 功能描述:熱插拔功率分布 Retry Pos Hi-Voltage Pwr-Limiting 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
TPS2491EVM-002 功能描述:電源管理IC開(kāi)發(fā)工具 TPS2491-002 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS2492EVM-001 功能描述:電源管理IC開(kāi)發(fā)工具 TPS2492 Hot Swap Controller Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS2492EVM-003 功能描述:電源管理IC開(kāi)發(fā)工具 TPS2492 Hot Swap Controller Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS2492PW 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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