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參數資料
| 型號： | ISP1521 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Hi-Speed Universal Serial Bus hub controller |
| 中文描述： | 高速通用串行總線控制器樞紐 |
| 文件頁數： | 15/53頁 |
| 文件大小： | 270K |
| 代理商： | ISP1521 |
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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
15 of 53
9397 750 13702
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
For 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 6
.
The PCB resistance may cause a drop of 25 mV, which leaves 75 mV for the power
switch and overcurrent sense device.
PSWn_N pins have integrated weak pull-up resistors inside the chip.
9.1.3
Overcurrent protection mode
The ISP1521 supports all overcurrent protection modes: none, global and individual.
No overcurrent protection mode reporting is selected when pin NOOC = HIGH.
Global and individual overcurrent protection modes are selected using pins PSWn_N,
following the power switching modes selection scheme; see
Table 6
.
For the global overcurrent protection mode, only PSW1_N and OC1_N are active;
that is, in this mode, the remaining overcurrent indicator pins are disabled. To inhibit
the analog overcurrent detection, the OC_N pins must be connected to V
REF(5V0)
.
(1) Includes PCB traces, ferrite beads, and so on.
Fig 5.
Typical voltage drop components in the self-powered mode using individual overcurrent detection.
5 V
POWER SUPPLY
±
3 % regulated
+
4.85 V (min)
004aaa264
low-ohmic
PMOS switch
ISP1521
power switch
(PSWn_N)
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, and so on.
Fig 6.
Typical voltage drop components in the self-powered mode using global overcurrent detection.
5.1 V KICK-UP
POWER SUPPLY
±
3 % regulated
+
4.95 V(min)
004aaa265
low-ohmic
PMOS 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)
ISP1521 power
switch
(PSWn_N)
Table 5:
Power switching mode
None
Ganged
Power switching mode: pin configuration
PSW1_N
ground
internal
pull-up
internal
pull-up
PSW2_N
ground
ground
PSW3_N
ground
ground
PSW4_N
ground
ground
PSW5_N
ground
ground
PSW6_N
ground
ground
PSW7_N
ground
ground
Individual
internal
pull-up
internal
pull-up
internal
pull-up
internal
pull-up
internal
pull-up
internal
pull-up
相關PDF資料 |
PDF描述 |
|---|---|
| ISP1521BE | Hi-Speed Universal Serial Bus hub controller |
| ISP1561 | ISP1561BM |
| ISP1561BM | ISP1561BM |
| ISP1562 | Hi-Speed Universal Serial Bus PCI Host Controller |
| ISP1562BE | Hi-Speed Universal Serial Bus PCI Host Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1521BE | 功能描述:IC USB HUB CONTROLLER HS 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| ISP1521BE,518 | 功能描述:USB 接口集成電路 USB2 7-PORT HUB CTRLR RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1521BE,551 | 功能描述:USB 接口集成電路 USB2 7 PORT HUB RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1521BE,557 | 功能描述:USB 接口集成電路 DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1521BE518 | 制造商:ST-Ericsson 功能描述:IC CONTROLLER USB HUB 80LQFP |
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