参数资料
型号: TPS2065DBVT
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
封装: GREEN, PLASTIC, SOT-23, 5 PIN
文件页数: 13/40页
文件大小: 1325K
代理商: TPS2065DBVT
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
SLVS490I – DECEMBER 2003 – REVISED OCTOBER 2009
www.ti.com
Figure 28. 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 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
Copyright 2003–2009, Texas Instruments Incorporated
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