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参数资料
| 型号： | TPS2046BDR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 9/29页 |
| 文件大小： | 901K |
| 代理商： | TPS2046BDR |
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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+
EN2
GND
1
TPS2046B
USB POWER-DISTRIBUTION REQUIREMENTS
SLVS532C – JULY 2004 – REVISED OCTOBER 2007
Figure 25. High-Power Bus-Powered Function (Example, TPS2046B)
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/self-powered hubs must:
–
Current-limit downstream ports
–
Report overcurrent conditions on USB VBUS
Bus-powered hubs 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 TPS204xB/TPS2055B 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
Copyright 2004–2007, Texas Instruments Incorporated
17
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| TPS2046D | 功能描述:电源开关 IC - USB Dual 1in 2out .7A RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS2046DG4 | 功能描述:电源开关 IC - USB 0.345A 2.7-5.5V Dual Hi-Side MOSFET RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS2046DR | 功能描述:电源开关 IC - USB Dual 1in 2out .7A RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
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