參數(shù)資料
型號(hào): TPS2033P
廠商: Texas Instruments, Inc.
英文描述: POWER-DISTRIBUTION SWITCHES
中文描述: 配電開(kāi)關(guān)
文件頁(yè)數(shù): 20/25頁(yè)
文件大?。?/td> 470K
代理商: TPS2033P
SLVS190B DECEMBER 1998 REVISED MARCH 2004
20
TI.COM
APPLICATION INFORMATION
generic hot-plug applications (see Figure 40)
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 TPS203x 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 TPS203x 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
TPS2034
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 40. Typical Hot-Plug Implementation
By placing the TPS203x 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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