參數(shù)資料
型號(hào)： TPS2042DR
英文描述： Dual Peripheral Driver
中文描述： 雙外圍驅(qū)動(dòng)器
文件頁(yè)數(shù)： 19/22頁(yè)
文件大小： 356K
代理商： TPS2042DR
TPS2010A, TPS2011A, TPS2012A, TPS2013A
POWER-DISTRIBUTION SWITCHES
SLVS189A – DECEMBER 1998 – REVISED NOVEMBER 1999
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
undervoltage lockout (UVLO)
An undervoltage lockout ensures that the power switch is in the off state at power up. Whenever the input voltage
falls below approximately 2 V, the power switch will be quickly turned off. This facilitates the design of
hot-insertion systems where it is not possible to turn off the power switch before input power is removed. The
UVLO will also keep the switch from being turned on until the power supply has reached at least 2 V, even if
the switch is enabled. Upon reinsertion, the power switch will be turned on, with a controlled rise time to reduce
EMI and voltage overshoots.
generic hot-plug applications (see Figure 36)
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. Because of the controlled rise times and fall times of the TPS201xA series, 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 TPS201xA also ensures the switch will be off after the card has been removed, and the switch will be off
during the next insertion. The UVLO feature guarantees a soft start with a controlled rise time for every insertion
of the card or module.
Power
Supply
Block of
Circuitry
TPS2013A
GND
IN
IN
EN
OUT
OUT
OUT
OUT
0.1
μ
F
1000
μ
F
Optimum
2.7 V to 5.5 V
PC Board
Figure 36. Typical Hot-Plug Implementation
By placing the TPS201xA between the V
CC
input and the rest of the circuitry, the input power will reach this
device first after insertion. The typical rise time of the switch is approximately 9 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.
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TPS2042P 功能描述:電源開(kāi)關(guān) IC - USB Dual 1in 2out .7A 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
TPS2042PE4 功能描述:電源開(kāi)關(guān) IC - USB 0.7A 2.7-5.5V Dual Hi-Side MOSFET 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
TPS2043 制造商:TI 制造商全稱:Texas Instruments 功能描述:POWER DISTRIBUTION SWITCHES
TPS2043A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:0.7A. 2.7-5.5V Triple (2In/3Out) Hi-Side MOSFET. Fault Report. Act-Low Enable
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