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參數(shù)資料
| 型號(hào)： | TPS2066DG4R |
| 廠(chǎng)商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | PLASTIC, SO-8 |
| 文件頁(yè)數(shù)： | 13/35頁(yè) |
| 文件大小： | 821K |
| 代理商： | TPS2066DG4R |
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www.ti.com
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+
TPS2062
EN2
GND
1
USB POWER-DISTRIBUTION REQUIREMENTS
SLVS490D – DECEMBER 2003 – REVISED FEBRUARY 2007
APPLICATION INFORMATION (continued)
Figure 28. High-Power Bus-Powered Function
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 F)
Functions must:
–
Limit inrush currents
–
Power up at <100 mA
The feature set of the TPS206x 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 29).
20
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