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| 型號： | TPS2480PW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封裝： | GREEN, PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 8/56頁 |
| 文件大小： | 1381K |
| 代理商： | TPS2480PW |
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SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
www.ti.com
Action of the Constant Power Engine (Figure 13)
The calculated power dissipated in the external FET, VDS x ID, is computed under the same startup conditions as
Figure 12. The current of the external FET, labeled IIN, initially rises to the value that satisfies the constant power
engine; in this case it is 54 W / 48 V = 1.1 A. The 54-W value is programmed into the engine by setting the
PROG voltage using Equation 1. VDS of the external FET, which is calculated as V(SENSE-OUT) , falls as CO
charges, thus allowing the 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 13, labeled MOSFET POWER, is seen to be flat-topped and 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 and still protects the device.
Figure 13. Computation of the External FET Stress During Startup
16
Copyright 2010, Texas Instruments Incorporated
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| TPS2480PWR | 功能描述:熱插拔功率分布 Pos Vltg,Int Prot Dev/Hotswap Cntrlr 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 |
| TPS2481EVM-001 | 功能描述:電源管理IC開發(fā)工具 Eval Mod for TPS2481 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 |
| TPS2481PW | 功能描述:熱插拔功率分布 Pos VltgInt Prot Dev/Hotswap Cntrlr 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 |
| TPS2481PWR | 功能描述:熱插拔功率分布 Pos VltgInt Prot Dev/Hotswap Cntrlr 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 |
| TPS2482PW | 制造商:Texas Instruments 功能描述:Hot Swap Controller 1-CH 80V 20-Pin TSSOP Tube 制造商:Texas Instruments 功能描述:IC CTRLR HOT SWAP 9-36V 20TSSOP 制造商:Texas Instruments 功能描述:36V Hotswap Cntlr w/ Digital Pwr Monitor |
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