參數(shù)資料
型號(hào)： TPS2058
廠商： Texas Instruments, Inc.
英文描述： "0.345A
中文描述： 0.345A、2.7-5.5V 四路（2 入/4 出）高側(cè) MOSFET、故障報(bào)告、工作態(tài)高電平啟用
文件頁(yè)數(shù)： 17/24頁(yè)
文件大小： 424K
代理商： TPS2058
TPS2048, TPS2058
QUAD CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
SLVS192 – APRIL 1999
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
GND1
IN1
EN1
EN2
OC1
OC2
OUT1
OUT2
TPS2048
GND1
IN1
EN1
EN2
OC1
OC2
OUT1
OUT2
TPS2048
Rpullup
V+
Rfilter
Rpullup
Cfilter
To USB
Controller
V+
OC3
OC4
OUT3
OUT4
GND2
IN2
EN3
EN4
GND2
IN2
EN3
EN4
OC3
OC4
OUT3
OUT4
Figure 30. Typical Circuit for OC Pin and RC Filter for Damping Inrush OC Responses
power dissipation and junction temperature
The low on-resistance on the n-channel MOSFET allows small surface-mount packages, such as SOIC, to pass
large currents. The thermal resistances of these packages are high compared to those of power packages; it
is good design practice to check power dissipation and junction temperature. The first step is to find r
DS(on)
at
the input voltage and operating temperature. As an initial estimate, use the highest operating ambient
temperature of interest and read r
DS(on)
from Figure 21. Next, calculate the power dissipation using:
I2
PD
rDS(on)
Finally, calculate the junction temperature:
TJ
PD
RJA
TA
Where:
T
A
= Ambient Temperature
°
C
R
θ
JA
= Thermal resistance SOIC = 172
°
C/W
Compare the calculated junction temperature with the initial estimate. If they do not agree within a few degrees,
repeat the calculation, using the calculated value as the new estimate. Two or three iterations are generally
sufficient to get a reasonable answer.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2058A 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
TPS2058AD 功能描述:電源開關(guān) IC - USB Qd .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
TPS2058ADG4 功能描述:電源開關(guān) IC - USB 0.345A 2.7-5.5V Quad 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
TPS2058ADR 功能描述:電源開關(guān) IC - USB 0.345A 2.7-5.5V Quad 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
TPS2058ADRG4 功能描述:電源開關(guān) IC - USB 0.345A 2.7-5.5V Quad 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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