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參數(shù)資料
| 型號： | TPS203X |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | USB POWER DISTRIBUTION |
| 中文描述： | USB電源分布 |
| 文件頁數(shù)： | 11/19頁 |
| 文件大?。?/td> | 116K |
| 代理商： | TPS203X |
Self-Powered Hub Port Protection Topologies
7
TPS202x/3x and TPS204x/5x USB Power Distribution
I(T)
I(1)
L1
+
–
4.75 V
L2
I(2)
L3
+
–
4.75 V
L4
I(3)
L5
+
–
4.75 V
L6
I(4)
L7
+
–
4.75 V
L8
POWER
SUPPLY
R(TRACE) R(SWITCH)
Figure 3. Simplified Ganged Port Protection Topology
The typical voltage droop on a two-, three- and four-ganged port self-powered
hub was measured using different types (e.g. tantalum and aluminum) and values
of output capacitors with the legal USB hot plug load of 10
μ
F and 44
. Tantalum,
aluminum electrolytic, and ceramic capacitors were used for the 10-
μ
F load
capacitors to investigate the effect on the drooping. The 10-
μ
F ceramic capacitor
resulted in the largest output voltage droop and the aluminum electrolytic gave
the smallest droop. Typical USB applications use aluminum electrolytic
capacitors of 10
μ
F or less, and voltage droop results will be shown using a 10-
μ
F,
50-V capacitor. Voltage droop on the hub output varied with the length of cable
and the equivalent series resistance of the load and output capacitors. Figure 4
shows the TPS2024 in a ganged-port protection topology, and Table 2 lists
voltage droop results for a ganged topology. Figure 5 shows scope traces for a
four port ganged hub using 33-
μ
F tantalum capacitors, and Figure 6 shows the
same data using 100-
μ
F aluminum electrolytic capacitors.
相關PDF資料 |
PDF描述 |
|---|---|
| TPS2032P | POWER-DISTRIBUTION SWITCHES |
| TPS2033P | POWER-DISTRIBUTION SWITCHES |
| TPS2052P | DUAL POWER-DISTRIBUTION SWITCHES |
| TPS2100D | VAUX POWER-DISTRIBUTION SWITCHES |
| TPS2100DBV | VAUX POWER-DISTRIBUTION SWITCHES |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2041 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:POWER DISTRIBUTION SWITCHES |
| TPS2041A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| TPS2041AD | 功能描述:電源開關 IC - USB 0.7A 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 |
| TPS2041ADG4 | 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 |
| TPS2041ADR | 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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