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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)： | 17/56頁 |
| 文件大?。?/td> | 1381K |
| 代理商： | TPS2480PW |
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=
O
VCC
ON
CHARGE
C
V
t
I
GATE
ON
G
ISS
VCC
I
t
C
V
=
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SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
www.ti.com
Alternative Inrush Designs
Gate Capacitor (dV/dt) Control
The TPS2480/81 can be configured to provide a linear dV/dt turn on characteristic. The load capacitor charging
current ICHARGE, is controlled by a single capacitor from the GATE terminal to ground. M1 operates as a source
follower (following the gate voltage) in this implementation. Choose a charge time, tON, based on the load
capacitor, CO input voltage VI, and desired charge current. When power limiting is used (VPROG < VREF) choose
ICHARGE to be less than PLIM /VVCC to prevent the fault timer from starting. The fault timer starts only if power or
current limit is invoked.
(26)
Use the following equation to select the gate capacitance, CG. CISS is the gate capacitance of M1, and IGATE is
the TPS2480/81 nominal gate charge current. As shown in Figure 17, a series resistor of about 1 k
should be
used in series with CG.
(27)
If neither power nor current limit faults are invoked during turn on, CT can be chosen for fast transient turn off
response using the M1 SOA curve. Choose the single pulse time conservatively from the M1 SOA curve using
maximum operating voltage and maximum trip current.
PROG Inrush Control
A capacitor can be connected from the PROG pin to ground to reduce the initial current step seen in Figure 12.
This method maintains a relatively fast turn-on time without the drawbacks of a gate-to-ground capacitor that
include increased short circuit response time and less predictable gate clamping.
24
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 |
|---|---|
| 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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