參數(shù)資料
型號(hào)： TPS2068IDGNRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源管理
英文描述： POWER SUPPLY SUPPORT CKT, PDSO8
封裝： GREEN, PLASTIC, MSOP-8
文件頁(yè)數(shù)： 7/24頁(yè)
文件大?。?/td> 756K
代理商： TPS2068IDGNRQ1
IN
OC1
OC2
2
8
3
5
4
7
0.1
F
10
F
Internal
Function
OUT1
Power Supply
3.3 V
EN1
6
0.1
F
10
F
OUT2
Internal
Function
0.1
F
10
F
USB
Control
GND
VBUS
D
D+
TPS2060
EN2
GND
1
www.ti.com ................................................................................................................................................................................................ SLVS999 – AUGUST 2009
Low-Power Bus-Powered 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 100mA; 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
μF at power up, the device must implement inrush current limiting (see Figure 22). With TPS2068, the
internal functions could draw more than 500 mA, which fits the needs of some applications such as motor driving
circuits.
Figure 22. High-Power Bus-Powered Function
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/SPHs must:
–
Current-limit downstream ports
–
Report overcurrent conditions on USB VBUS
BPHs must:
–
Enable/disable power to downstream ports
–
Power up at <100 mA
–
Limit inrush current (<44
and 10 μF)
Functions must:
–
Limit inrush currents
–
Power up at <100 mA
The feature set of the TPS2068 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-powered hubs, as well as the input ports for
bus-powered functions (see Figure 23).
Copyright 2009, Texas Instruments Incorporated
15
Product Folder Link(s): TPS2068-Q1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2068-Q1 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-LIMITED POWER-DISTRIBUTION SWITCH
TPS2069 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES
TPS2069C 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Current-Limited, Power-Distribution Switches Deglitched Fault Reporting
TPS2069CDBVR 功能描述:電源開(kāi)關(guān) IC - 配電 Sgl Ch Current-Ltd USB Pwr Disti Switch RoHS:否 制造商:Exar 輸出端數(shù)量:1 開(kāi)啟電阻（最大值）:85 mOhms 開(kāi)啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5
TPS2069CDBVT 功能描述:電源開(kāi)關(guān) IC - 配電 Sgl Ch Current-Ltd USB Pwr Disti Switch RoHS:否 制造商:Exar 輸出端數(shù)量:1 開(kāi)啟電阻（最大值）:85 mOhms 開(kāi)啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5
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