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| 型号： | TPS2074DB |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24 |
| 封装： | GREEN, PLASTIC, SSOP-24 |
| 文件页数： | 18/29页 |
| 文件大小： | 732K |
| 代理商： | TPS2074DB |
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USB HYBRID HUB
SLVS287B – SEPTEMBER 2000 – REVISED SEPTEMBER 2007
A USB hybrid hub can be simply implemented using the TPS2071 USB power controller and a TUSB2046 USB
hub controller as shown in Figure 38. The TPS2071 USB power controller provides all the power needs to the
four downstream ports and meets all the USB power specifications for both self-powered hubs and bus-powered
hubs. The integrated 3.3-V LDO of the power controller is used to provide power for the hub controller and any
other local functions (e.g., transient suppressor SN75240 ), which saves board space and cost. The TPS2071
also provides the hub controller with a power-good (PG) signal that connects to the RESET input of the hub
controller to reinitialize the hub automatically when switching between self-powered mode and bus-powered
mode whenever the self-power supply is connected or disconnected. The amount of time in which the hub
controller is kept in a reset state is controlled by a capacitor connected between the PG_DLY pin of the power
controller and ground.
By using an external N-channel MOSFET and the TPS2071 internal voltage-regulator controller, a regulated 5-V
self-powered source can be generated from an input voltage range of 6 V to 9 V (see Figure 38). In this
configuration, the internal voltage regulator controller is enabled by connecting the EN_REG input to the BP
input. Using the internal voltage regulator controller also requires connecting a 0.01-
μF capacitor between CP_P
and CP_M of the TPS2071 power controller. Also, a 0.1-
μF capacitor is needed between VCP of the power
controller and ground.
Copyright 2000–2007, Texas Instruments Incorporated
25
Product Folder Link(s): TPS2070 TPS2071
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| TPS2074 | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2074DBG4 | 功能描述:热插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2075DB | 功能描述:热插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2075DB | 制造商:Texas Instruments 功能描述:IC VDSL2 DVR AMP DUAL 24-HTSSOP 制造商:Texas Instruments 功能描述:IC, VDSL2 DVR AMP DUAL 24-HTSSOP |
| TPS2075DBG4 | 功能描述:热插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2075DBR | 功能描述:热插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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