欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: ISP1122BD
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Universal Serial Bus stand-alone hub
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP32
封裝: 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-358-1, LQFP-32
文件頁數: 23/48頁
文件大小: 1159K
代理商: ISP1122BD
Philips Semiconductors
ISP1122
USB stand-alone hub
Product specification
Rev. 03 — 29 March 2000
23 of 48
9397 750 07002
Philips Electronics N.V. 2000. All rights reserved.
Assuming a 5 V
±
3% power supply the worst case supply voltage is 4.85 V. This only
allows a voltage drop of 100 mV across the hub printed-circuit board (PCB) to each
downstream connector. This includes a voltage drop across:
Power supply connector
Hub PCB (power and ground traces, ferrite beads)
Power switch (FET on-resistance)
Overcurrent sense device.
PCB resistance and power supply connector resistance may cause a drop of 25 mV,
leaving only 75 mV as the voltage drop allowed across the power switch and
overcurrent sense device. The individual voltage drop components are shown in
Figure 6
.
In case of global overcurrent detection an increased voltage drop is needed for the
overcurrent sense device (in this case a low-ohmic resistor). This can be realized by
using a special power supply of 5.1 V
±
3%, as shown in
Figure 7
.
11.1.2
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.
(1) Includes PCB traces, ferrite beads, etc.
Fig 6.
Typical voltage drop components in self-powered mode using individual overcurrent detection.
handbook, full pagewidth
5 V
POWER SUPPLY
±
3% regulated
+
4.85 V(min)
MGR781
low-ohmic
PMOS switch
ISP1122
power
switch
VBUS
D
+
D
GND
SHIELD
4.75 V(min)
downstream
port
connector
hub board
resistance
voltage drop
25 mV
voltage drop
75 mV
(1)
(1) Includes PCB traces, ferrite beads, etc.
Fig 7.
Typical voltage drop components in self-powered mode using global overcurrent detection.
handbook, full pagewidth
5.1 V KICK-UP
POWER SUPPLY
±
3% regulated
+
4.95 V(min)
MGR782
low-ohmic
PMOS switch
ISP1122
power
switch
VBUS
D
+
D
GND
SHIELD
4.75 V(min)
downstream
port
connector
hub board
resistance
voltage drop
25 mV
voltage drop
75 mV
low-ohmic
sense resistor
for overcurrent
detection
voltage drop
100 mV
(1)
相關PDF資料
PDF描述
ISP1122D Universal Serial Bus stand-alone hub
ISP1122NB Universal Serial Bus stand-alone hub
ISP1123BD CAP .068UF 100V PPS FILM ECH-S
ISP1123 Universal Serial Bus compound hub
ISP1123D Universal Serial Bus compound hub
相關代理商/技術參數
參數描述
ISP1122D 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub
ISP1122NB 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub
ISP1123 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub
ISP1123BD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub
ISP1123D 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub
主站蜘蛛池模板: 南江县| 文安县| 元朗区| 潼南县| 北宁市| 平原县| 武城县| 通化县| 仲巴县| 仁化县| 绥中县| 吐鲁番市| 娱乐| 东阿县| 吴忠市| 新密市| 延吉市| 会宁县| 栾川县| 龙州县| 三原县| 清镇市| 涞源县| 郎溪县| 沙坪坝区| 桦甸市| 黑河市| 宜昌市| 娄底市| 达州市| 泽库县| 英吉沙县| 阳曲县| 榕江县| 钦州市| 德兴市| 新巴尔虎右旗| 都安| 苍溪县| 扎囊县| 安丘市|