參數(shù)資料
型號(hào)： TPS2492PW
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 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)： 5/33頁(yè)
文件大?。?/td> 1096K
代理商： TPS2492PW
www.ti.com
SLUSA65A – JULY 2010 – REVISED AUGUST 2010
APPLICATION INFORMATION
Basic Operation
The TPS2492/93 features include:
1. Adjustable under-voltage and over-voltage lockout;
2. Turn-on inrush limit;
3. High-side gate drive for an external N-channel FET;
4. FET protection (power limit and current limit);
5. Adjustable overload timeout;
6. Output current monitor;
7. Status output;
8. Charge-complete indicator for downstream converter sequencing; and
9. Optional automatic restart mode.
The TPS2492/93 features power-limiting FET protection that allows independent control of current limit (to set
maximum full-load current), power limit (to keep FET in its safe operating area), and overload time (to control
temperature rise). The power limiting feature controls the V and I across the FET to protect it, and does not
control load power. This protection is a specialized form of foldback output limiting. Given a constant power
dissipation, computation of peak junction temperature is straight forward. The TPS2393 provides a small
operating duty cycle into a short, reducing the average temperature rise of the FET to levels similar to normal
operation in many systems. This prevents overheating and failure with prolonged exposure to an output short.
The typical application circuit, and oscilloscope plots of Figure 13 and Figure 17 demonstrate many of the
functions described above.
Board Plug-In (Figure 13)
Only the bypass capacitor charge current and small bias currents are evident when a board is first plugged in as
seen in Figure 13. The TPS2492/93 is held inactive with GATE, PROG, and TIMER held low, and with PG and
FLT open drain, for less than 1 ms while internal voltages stabilize. Then GATE, PROG, TIMER, FLT and PG are
released and the part begins sourcing current to the GATE pin because UVEN is high and OV is low. The
external FET begins to turn on while the voltage across it, V(SENSE-OUT), and current through it,
V(VCC-SENSE)/RSENSE, are monitored. Current initially rises to the value which satisfies the power limit engine (PLIM/
VVCC) since the output capacitor was discharged. The shape of the input current waveform shows the operation
of the FET power limit. In this case, the 5-A current limit is never reached as the output reaches full charge. This
is likely due to the limited gate slew rate.
Copyright 2010, Texas Instruments Incorporated
13
Product Folder Link(s): TPS2492 TPS2493
相關(guān)PDF資料
PDF描述
TPS2540RTER 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16
TPS2540RTET 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16
TPS2541RTET 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16
TPS2550DBV 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6
TPS2551DRVR 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6
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(kāi)發(fā)工具 TPS2493 Hot Swap ontroller 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
TPS2493EVM-004 功能描述:電源管理IC開(kāi)發(fā)工具 TPS2493 Hot Swap ontroller 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
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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