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| 型号： | TPS2491DGSG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封装： | GREEN, PLASTIC, MSOP-10 |
| 文件页数： | 5/24页 |
| 文件大小： | 534K |
| 代理商： | TPS2491DGSG4 |
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
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相关代理商/技术参数 |
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| TPS2491DGSR | 功能描述:热插拔功率分布 Retry Pos Hi-Voltage Pwr-Limiting RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2491DGSRG4 | 功能描述:热插拔功率分布 Retry Pos Hi-Voltage Pwr-Limiting RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2491EVM-002 | 功能描述:电源管理IC开发工具 TPS2491-002 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS2492EVM-001 | 功能描述:电源管理IC开发工具 TPS2492 Hot Swap Controller Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS2492EVM-003 | 功能描述:电源管理IC开发工具 TPS2492 Hot Swap Controller Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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