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參數(shù)資料
| 型號： | TPS2055P |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| 中文描述： | 限流配電開關 |
| 文件頁數(shù)： | 20/23頁 |
| 文件大?。?/td> | 406K |
| 代理商： | TPS2055P |
TPS2045, TPS2055
CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
SLVS182 – APRIL 1999
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
generic hot-plug applications (see Figure 33)
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 TPS2045 and TPS2055, 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 TPS2045 and TPS2055 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
TPS2045
GND
IN
IN
EN
OUT
OUT
OUT
OC
0.1
μ
F
1000
μ
F
Optimum
2.7 V to 5.5 V
PC Board
Overcurrent Response
Figure 33. Typical Hot-Plug Implementation
By placing the TPS2045 and TPS2055 between the V
CC
input and the rest of the circuitry, the input power will
reach these devices first after insertion. The typical rise time of the switch is approximately 2.5 ms, providng
a slow voltage ramp at the output of the device. This implementaion controls system surge currents and provides
a hot-plugging mechanism for any device.
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| TPS2055PE4 | 功能描述:電源開關 IC - USB 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 |
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| TPS2056A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| TPS2056AD | 功能描述:電源開關 IC - USB Dl .345A 2.7-5.5V Hi 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 |
| TPS2056ADG4 | 功能描述:電源開關 IC - USB Dl .345A 2.7-5.5V Hi 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 |
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