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參數(shù)資料
| 型號： | ISP1130 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Universal Serial Bus compound hub with integrated keyboard controller |
| 中文描述： | 通用串行總線控制器與集成鍵盤復(fù)合樞紐 |
| 文件頁數(shù)： | 52/68頁 |
| 文件大?。?/td> | 1786K |
| 代理商： | ISP1130 |
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Philips Semiconductors
ISP1130
USB compound hub with keyboard controller
Objective specification
Rev. 01 — 23 March 2000
52 of 68
9397 750 06895
Philips Electronics N.V. 2000. All rights reserved.
12. Hub power modes
USB hubs can either be self-powered or bus-powered.
Self-powered —
Self-powered hubs have a 5 V local power supply on board which
provide power to the hub and the downstream ports. The USB Specification Rev. 1.1
requires that these hubs limit the current to 500 mA per downstream port and report
overcurrent conditions to the host. The hub may optionally draw 100 mA from the
USB supply (V
BUS
) to power the interface functions (
hybrid-powered
).
Bus-powered —
Bus-powered hubs obtain all power from the host or an upstream
self-powered hub. The maximum current is 100 mA per downstream port. Current
limiting and reporting of overcurrent conditions are both optional.
The ISP1130 has bus-powered downstream ports and supports individual power
switching via pins PSWn.
12.1 Voltage drop requirements
12.1.1
Bus-powered hubs
Bus-powered hubs are guaranteed to receive a supply voltage of 4.5 V at the
upstream port connector and must provide a minimum of 4.4 V to the downstream
port connectors. The voltage drop of 100 mV across bus-powered hubs includes:
Hub PCB (power and ground traces, ferrite beads)
Power switch (FET on-resistance)
Overcurrent sense device.
The PCB resistance may cause a drop of 25 mV, which leaves 75 mV for the power
switch and overcurrent sense device. The voltage drop components are shown in
Figure 9
.
For bus-powered hubs overcurrent protection is optional. It may be implemented for
all downstream ports on a global or individual basis. The ISP1130 has individual
overcurrent protection for its downstream ports.
(1) Includes PCB traces, ferrite beads, etc.
Fig 9.
Typical voltage drop components in bus-powered mode (no overcurrent detection).
handbook, full pagewidth
MGR783
low-ohmic
PMOS switch
ISP1122
power
switch
VBUS
D
+
D
GND
SHIELD
VBUS
D
+
D
GND
SHIELD
4.40 V(min)
4.50 V(min)
downstream
port
connector
upstream
port
connector
hub board
resistance
voltage drop
25 mV
voltage drop
75 mV
(1)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISP1130DL | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130N | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1160 | Embedded Universal Serial Bus Host Controller |
| ISP1160BD | Embedded Universal Serial Bus Host Controller |
| ISP1160BM | Embedded Universal Serial Bus Host Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISP1130DL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1160 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller |
| ISP1160BD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller |
| ISP1160BD,157 | 功能描述:USB 接口集成電路 USB 1.1 HOST CONTROLLER RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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