- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69504 > TPS2420RSAR (TEXAS INSTRUMENTS INC) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 PDF資料下載
參數(shù)資料
| 型號： | TPS2420RSAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封裝： | 4 X 4 MM, PLASTIC, QFN-16 |
| 文件頁數(shù)： | 8/29頁 |
| 文件大?。?/td> | 1368K |
| 代理商： | TPS2420RSAR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
( )
IFLT
FAULT
200k
200,000
R
80 k
I
2.5
W
=
=
W
( )
IMAX
201k
201,000
R
57.4 k
I
3.5
W
=
=
W
SLUS903C – JANUARY 2009 – REVISED AUGUST 2010
www.ti.com
Start Up Into a Short
The controller attempts to power on into a short for the duration of the timer. Figure 20 shows a small current
resulting from power limiting the internal MOSFET. This happens only once for the latch off mode. For the retry
Shutdown Modes
Hard Overload - Fast Trip
When a hard overload causes the load current to exceed 1.6 × ILIMIT the TPS2420 immediately shuts off current
to the load without waiting for the fault timer to expire. After such a shutoff the TPS2420 enters into startup mode
and attempts to apply power to the load.
If the hard overload is caused by a current transient, then a normal startup can be expected with a low probability
of disruption to the load, assuming there is sufficient load capacitance to hold up the load during the fractions of
a millisecond that make up the fast trip/restart cycle.
If the hard overload is caused by a real, continuous failure then the TPS2420 goes into current limit during the
attempt at restart. The timer starts and eventually runs out, shutting off current to the load. See the fast trip
figures 22 and 23. When the hard overload occurs the current is turned off, the PG pin becomes false, and the
FLT pin stays false. The FLT pin becomes true only when the fault timer times out.
Overcurrent Shutdown
Overcurrent shutdown occurs when the output current exceeds ILIMIT for the duration of the fault timer.
Overcurrent shutdown is the circuit breaker type protection of equipment. Figure 23 shows the step rise in output
current. The increased current is on for the duration of the timer. At conclusion of the timer, the output is turned
off.
Design Example
The TPS2420 Design shown in Figure 25 supports 12 V to operate a hot plugged disk drive.
The 12 V specification for a disk drive is approximately 1-A operating current and 2-A typical spin-up. Selecting a
2.5 A setting for IFAULT would allow some margin for the operating current and satisfy the start current
requirements.
(10)
(11)
16
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2420
相關PDF資料 |
PDF描述 |
|---|---|
| TPS2458RHBT | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| TPS2458RHBR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| TPS24720RGTT | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| TPS24720RGTR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| TPS2500DRCT | 6 A SWITCHING REGULATOR, 1075 kHz SWITCHING FREQ-MAX, PDSO10 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2420RSAT | 功能描述:熱插拔功率分布 Int FET 0-5A Dual Fault Threshold 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2420RSAT | 制造商:Texas Instruments 功能描述:Hot Swap Contoller IC |
| TPS2421-1DDA | 功能描述:熱插拔功率分布 3-20V Integ FET 0-5A Hot Swap 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2421-1DDAR | 功能描述:熱插拔功率分布 3-20V Integ FET 0-5A Hot Swap 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2421-1EVM-02 | 功能描述:電源管理IC開發(fā)工具 TPS2421-1 Hot Swap Controller Eval Mod 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。