- 您现在的位置：买卖IC网 > PDF目录69504 > TPS2420RSAR (TEXAS INSTRUMENTS INC) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 PDF资料下载
参数资料
| 型号： | TPS2420RSAR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封装： | 4 X 4 MM, PLASTIC, QFN-16 |
| 文件页数： | 8/29页 |
| 文件大小： | 1368K |
| 代理商： | TPS2420RSAR |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
( )
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
相关PDF资料 |
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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2420RSAT | 功能描述:热插拔功率分布 Int FET 0-5A Dual Fault Threshold RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2420RSAT | 制造商:Texas Instruments 功能描述:Hot Swap Contoller IC |
| TPS2421-1DDA | 功能描述:热插拔功率分布 3-20V Integ FET 0-5A Hot Swap RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2421-1DDAR | 功能描述:热插拔功率分布 3-20V Integ FET 0-5A Hot Swap RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2421-1EVM-02 | 功能描述:电源管理IC开发工具 TPS2421-1 Hot Swap Controller Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。