參數(shù)資料
型號(hào)： TPS2205DAP
廠商： Texas Instruments, Inc.
英文描述： DUAL-SLOT PC CARD POWER-INTERFACE SWITCH FOR PARALLEL PCMCIA CONTROLLERS
中文描述： 雙插槽PC卡電源接口開(kāi)關(guān)并聯(lián)的PCMCIA控制器
文件頁(yè)數(shù)： 20/28頁(yè)
文件大?。?/td> 463K
代理商： TPS2205DAP
TPS2205
DUAL-SLOT PC CARD POWER-INTERFACE SWITCH
FOR PARALLEL PCMCIA CONTROLLERS
SLVS128D OCTOBER 1995 – REVISED JUNE 1998
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
overcurrent and thermal protection (continued)
Thermal limiting prevents destruction of the IC from overheating if the package power-dissipation ratings are
exceeded. Thermal limiting disables all power outputs (both A and B slots) until the device has cooled.
calculating junction temperature
The switch resistance, r
DS(on)
, is dependent on the junction temperature, T
J
, of the die. The junction temperature
is dependent on both r
DS(on)
and the current through the switch. To calculate T
J
, first find r
DS(on)
from Figures
20, 21, 22, and 23 using an initial temperature estimate about 50
°
C above ambient. Then calculate the power
dissipation for each switch, using the formula:
I2
PD
rDS(on)
Next, sum the power dissipation and calculate the junction temperature:
TJ
PD
RJA
TA, RJA
108 C W
Compare the calculated junction temperature with the initial temperature estimate. If the temperatures are not
within a few degrees of each other, recalculate using the calculated temperature as the initial estimate.
logic input and outputs
The TPS2205 was designed to be compatible with most popular PCMCIA controllers and current PCMCIA and
JEIDA standards. However, some controllers require slightly counterintuitive connections to achieve desired
output states. The TPS2205 control logic inputs A_VCC3, A_VCC5, B_VCC3 and B_VCC5 are defined active
low (see Figure 31 and control-logic table). As such, they are directly compatible with the logic outputs of the
Cirrus Logic CL-PD6720 controller.
The shutdown input (SHDN) of the TPS2205, when held at a logic low, places all V
CC
and V
pp
outputs in a
high-impedance state and reduces chip quiescent current to 1
μ
A to conserve battery power.
An overcurrent output (OC) is provided to indicate an overcurrent condition in any of the V
CC
or V
pp
supplies
(see discussion above).
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2205IDAP 功能描述:熱插拔功率分布 1A Dual-Slot PC Card Power Switch RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2205IDAP 制造商:Texas Instruments 功能描述:IC PCMCIA PWR I/F SW 32-TSSOP 制造商:Texas Instruments 功能描述:IC, PCMCIA PWR I/F SW 32-TSSOP
TPS2205IDAPG4 功能描述:熱插拔功率分布 1A Dual-Slot PC Card Pwr Sw RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2205IDAPR 功能描述:熱插拔功率分布 1A Dual-Slot PC Card Power Switch RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2205IDAPRG4 功能描述:熱插拔功率分布 1A Dual-Slot PC Card Power Switch RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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