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| 型號(hào)： | 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(yè)數(shù)： | 7/33頁(yè) |
| 文件大?。?/td> | 1096K |
| 代理商： | TPS2492PW |
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SLUSA65A – JULY 2010 – REVISED AUGUST 2010
Action of the Constant Power Engine (Figure 14)
The calculated power dissipated in the external FET, VDS x ID, is computed under the same startup conditions as
Figure 13. The current of the external FET, labeled IIN, initially rises to the value that satisfies the constant power
engine; in this case it is 25 W / 48 V = 0.52 A. The 25-W value is programmed into the engine by setting the
PROG voltage using R4 and R5. VDS of the external FET, which is calculated as V(SENSE-OUT), falls as CO
charges, thus allowing the external FET drain current to increase. This is the result of the internal constant power
engine adjusting the current limit reference to the GATE amplifier as CO charges and VDS falls. The calculated
device power in Figure 14, labeled POWER, is seen to be reasonably constant within the limitations of circuit
tolerance and acquisition noise. A fixed current limit is implemented by clamping the constant power engine
output to 50 mV when VDS is low. This protection technique can be viewed as a specialized form of foldback
limiting; the benefit over linear foldback is that it yields the maximum output current from a device over the full
range of VDS while still protecting the device.
Figure 14. Computation of the External FET Stress During Startup
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(píng)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(píng)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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