參數(shù)資料
型號(hào)： TPS2041BDGNR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： GREEN, PLASTIC, MSOP-8
文件頁(yè)數(shù)： 20/51頁(yè)
文件大?。?/td> 1451K
代理商： TPS2041BDGNR
Power
Supply
0.1
F
1000
F
Optimum
2.7 V to 5.5 V
PC Board
Overcurrent Response
TPS2042B
OC1
GND
EN1
IN
EN2
OUT1
OUT2
OC2
Block of
Circuitry
Block of
Circuitry
www.ti.com
SLVS514K – JUNE 2010 – REVISED DECEMBER 2008
GENERIC HOT-PLUG APPLICATIONS
In many applications it may be necessary to remove modules or pc boards while the main unit is still operating.
These are considered hot-plug applications. Such implementations require the control of current surges seen by
the main power supply and the card being inserted. The most effective way to control these surges is to limit and
slowly ramp the current and voltage being applied to the card, similar to the way in which a power supply
normally turns on. Due to the controlled rise times and fall times of the TPS204xB/TPS205xB, these devices can
be used to provide a softer start-up to devices being hot-plugged into a powered system. The UVLO feature of
the TPS204xB/TPS205xB also ensures that the switch is off after the card has been removed, and that the
switch is off during the next insertion. The UVLO feature insures a soft start with a controlled rise time for every
insertion of the card or module.
Figure 37. Typical Hot-Plug Implementation (Example, TPS2042B)
By placing the TPS204xB/TPS205xB between the VCC input and the rest of the circuitry, the input power reaches
these devices first after insertion. The typical rise time of the switch is approximately 1 ms, providing a slow
voltage ramp at the output of the device. This implementation controls system surge currents and provides a
hot-plugging mechanism for any device.
DETAILED DESCRIPTION
Power Switch
The power switch is an N-channel MOSFET with a low on-state resistance. Configured as a high-side switch, the
power switch prevents current flow from OUT to IN and IN to OUT when disabled. The power switch supplies a
minimum current of 500 mA.
Charge Pump
An internal charge pump supplies power to the driver circuit and provides the necessary voltage to pull the gate
of the MOSFET above the source. The charge pump operates from input voltages as low as 2.7 V and requires
little supply current.
Driver
The driver controls the gate voltage of the power switch. To limit large current surges and reduce the associated
electromagnetic interference (EMI) produced, the driver incorporates circuitry that controls the rise times and fall
times of the output voltage.
Enable (ENx)
The logic enable pin disables the power switch and the bias for the charge pump, driver, and other circuitry to
reduce the supply current. The supply current is reduced to less than 1 mA or 2 mA when a logic high is present
on EN. A logic zero input on EN restores bias to the drive and control circuits and turns the switch on. The
enable input is compatible with both TTL and CMOS logic levels.
Copyright 2010–2008, Texas Instruments Incorporated
27
相關(guān)PDF資料
PDF描述
TPS2041BDR 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2052BDG4 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2042BDRBT 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2042BDG4 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2041BDBVR 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2041BDGNRG4 功能描述:電源開(kāi)關(guān) IC - USB Single-Channel Current-Limited RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
TPS2041BDR 功能描述:電源開(kāi)關(guān) IC - USB Single-Channel Current-Limited RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
TPS2041BDRG4 功能描述:電源開(kāi)關(guān) IC - USB Single-Channel Current-Limited RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
TPS2041B-EP 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-LIMITED POWER-DISTRIBUTION SWITCH
TPS2041BEVM 功能描述:交換機(jī) IC 開(kāi)發(fā)工具 TPS2041B Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:USB Power Switches 工具用于評(píng)估:MAX4984E 工作電源電壓:2.8 V to 5.5 V
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*