- 您现在的位置：买卖IC网 > PDF目录98278 > TPS2042DG4 (TEXAS INSTRUMENTS INC) SPECIALTY ANALOG CIRCUIT, PDSO8 PDF资料下载
参数资料
| 型号： | TPS2042DG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封装： | GREEN, PLASTIC, SOIC-8 |
| 文件页数： | 9/26页 |
| 文件大小： | 583K |
| 代理商： | TPS2042DG4 |
TPS2042, TPS2052
DUAL POWER-DISTRIBUTION SWITCHES
SLVS173A – AUGUST 1998 – REVISED APRIL 1999
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
universal serial bus (USB) applications
The universal serial bus (USB) interface is a 12-Mb/s, or 1.5-Mb/s, multiplexed serial bus designed for
low-to-medium bandwidth PC peripherals (e.g., keyboards, printers, scanners, and mice). The four-wire USB
interface is conceived for dynamic attach-detach (hot plug-unplug) of peripherals. Two lines are provided for
differential data, and two lines are provided for 5-V power distribution.
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:
D Hosts/self-powered hubs (SPH)
D Bus-powered hubs (BPH)
D Low-power, bus-powered functions
D High-power, bus-powered functions
D Self-powered functions
Self-powered and bus-powered hubs distribute data and power to downstream functions. The TPS2042 and
TPS2052 can provide power-distribution solutions for many of these classes of devices.
host/self-powered and bus-powered hubs
Hosts and self-powered hubs have a local power supply that powers the embedded functions and the
downstream ports (see Figure 31). 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
F
2
8
3
5
4
7
6
0.1
F
68
F
0.1
F
68
F
GND
1
OUT1
OUT2
TPS2042
Power Supply
D+
D–
VBUS
GND
D+
D–
VBUS
Downstream
USB Ports
USB
Control
3.3 V
5 V
May need RC filter (see Figure 36)
Figure 31. Typical Two-Port USB Host/Self-Powered Hub
相关PDF资料 |
PDF描述 |
|---|---|
| TPS2052DG4 | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| TPS2042DRG4 | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| TPS2052DRG4 | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| TPS2049DRG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| TPS2062QDGNRQ1 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2042DR | 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 |
| TPS2042DRG4 | 功能描述:电源开关 IC - USB 0.7A 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 |
| TPS2042P | 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 |
| TPS2042PE4 | 功能描述:电源开关 IC - USB 0.7A 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 |
| TPS2043 | 制造商:TI 制造商全称:Texas Instruments 功能描述:POWER DISTRIBUTION SWITCHES |
发布紧急采购，3分钟左右您将得到回复。