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TPS2061DBVRG4 数据表(PDF) 23 Page - Texas Instruments

部件名 TPS2061DBVRG4
功能描述  Current-Limited, Power-Distribution Switches
PDF  55 Pages
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制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

TPS2061DBVRG4 数据表(HTML) 23 Page - Texas Instruments

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USB data is a 3.3-V level signal, but power is distributed at 5 V to allow for voltage drops in cases where power
is distributed through more than one hub across long cables. Each function must provide its own regulated 3.3 V
from the 5-V input or its own internal power supply.
The USB specification defines the following five classes of devices, each differentiated by power-consumption
requirements:
• Hosts/self-powered hubs (SPH)
• Bus-powered hubs (BPH)
• Low-power, bus-powered functions
• High-power, bus-powered functions
• Self-powered functions
SPHs and BPHs distribute data and power to downstream functions. The TPS206x has higher current capability
than required by one USB port; so, it can be used on the host side and supplies power to multiple downstream
ports or functions.
9.1.7 Host/Self-Powered and Bus-powered Hubs
Hosts and SPHs have a local power supply that powers the embedded functions and the downstream ports
(see Figure 9-3). This power supply must provide from 5.25 V to 4.75 V to the board side of the downstream
connection under full-load and no-load conditions. Hosts and SPHs are required to have current-limit protection
and must report overcurrent conditions to the USB controller. Typical SPHs are desktop PCs, monitors, printers,
and stand-alone hubs.
IN
OC1
EN1
OC2
EN2
GND
0.1 µF
2
8
3
5
4
7
33 µF
33 µF
GND
1
OUT1
TPS2062
Power Supply
D+
D−
VBUS
GND
D+
D−
VBUS
Downstream
USB Ports
USB
Controller
3.3 V
5 V
33 µF
GND
OUT2
D+
D−
VBUS
33 µF
GND
D+
D−
VBUS
6
0.1 µF
0.1 µF
0.1 µF
0.1 µF
Figure 9-3. Typical Four-Port USB Host / Self-Powered Hub
www.ti.com
TPS2061, TPS2062, TPS2063
TPS2065, TPS2066, TPS2067
SLVS490K – DECEMBER 2003 – REVISED JUNE 2024
Copyright © 2024 Texas Instruments Incorporated
Submit Document Feedback
23
Product Folder Links: TPS2061 TPS2062 TPS2063 TPS2065 TPS2066 TPS2067



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