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參數(shù)資料
| 型號(hào)： | TPS2047AD |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| 中文描述： | 限流配電開關(guān) |
| 文件頁數(shù)： | 22/31頁 |
| 文件大?。?/td> | 478K |
| 代理商： | TPS2047AD |
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TPS2045A, TPS2046A, TPS2047A, TPS2048A
TPS2055A, TPS2056A, TPS2057A, TPS2058A
CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
SLVS251A
–
SEPTEMBER 2000
–
REVISED FEBRUARY 2001
22
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
low-power bus-powered functions and high-power bus-powered functions
Both low-power and high-power bus-powered functions obtain all power from upstream ports; low-power
functions always draw less than 100 mA (see Figure 26); high-power functions must draw less than 100 mA
at power up and can draw up to 500 mA after enumeration. If the load of the function is more than the parallel
combination of 44
and 10
μ
F at power up, the device must implement inrush current limiting.
IN
OC
EN
GND
1
0.1
μ
F
2,3
5
4
6, 7, 8
0.1
μ
F
10
μ
F
GND
OUT
TPS2045A
Power Supply
3.3 V
D+
D
–
VBUS
USB
Control
10
μ
F
Internal
Function
Figure 26. Low-Power Bus-Powered Function (Example, TPS2045A)
USB power-distribution requirements
USB can be implemented in several ways, and, regardless of the type of USB device being developed, several
power-distribution features must be implemented.
Hosts/self-powered hubs must:
–
Current-limit downstream ports
–
Report overcurrent conditions on USB V
BUS
Bus-powered hubs must:
–
Enable/disable power to downstream ports
–
Power up at <100 mA
–
Limit inrush current (<44
and 10
μ
F)
Functions must:
–
Limit inrush currents
–
Power up at <100 mA
The feature set of the TPS204xA and TPS205xA allows them to meet each of these requirements. The
integrated current-limiting and overcurrent reporting is required by hosts and self-powered hubs. The logic-level
enable and controlled rise times meet the need of both input and output ports on bus-power hubs, as well as
the input ports for bus-power functions.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS2058ADR | CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| TPS2058ADRG4 | CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| TPS2056P | DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| TPS2058 | "0.345A |
| TPS2058D | QUAD CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2047ADG4 | 功能描述:電源開關(guān) IC - USB Tr .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 |
| TPS2047ADR | 功能描述:電源開關(guān) 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 |
| TPS2047ADRG4 | 功能描述:電源開關(guān) 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 |
| TPS2047BD | 功能描述:電源開關(guān) IC - USB Current-Limited 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 |
| TPS2047BDG4 | 功能描述:電源開關(guān) IC - USB Current-Limited 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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