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參數(shù)資料
型號: ISP1130DL
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: Universal Serial Bus compound hub with integrated keyboard controller
中文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PDSO56
封裝: PLASTIC, SSOP-56
文件頁數(shù): 54/68頁
文件大小: 1786K
代理商: ISP1130DL
Philips Semiconductors
ISP1130
USB compound hub with keyboard controller
Objective specification
Rev. 01 — 23 March 2000
54 of 68
9397 750 06895
Philips Electronics N.V. 2000. All rights reserved.
13.4 Reference circuit
A typical example of individual port power switching and individual overcurrent
detection is given in
Figure 11
. The RC circuit (10 k
and 1
μ
F) around the PMOS
switch provides for soft turn-on. Series resistors between pins OCn/DPGLn and the
supply voltage may be used to tune down the overcurrent trip voltage (see
Figure 10
).
I
OC(nom)
= 0.5
μ
A
Hybrid-powered mode.
I
OC(nom)
= 0.5
μ
A
Bus-powered mode.
a.
b.
Fig 10. Tuning the overcurrent trip voltage.
handbook, halfpage
MBL161
VCC
Rtd
low-ohmic
PMOS switch
VCC
ISP1130
OCn/DPGLn
IOC
handbook, halfpage
MBL160
VBUS
Rtd
low-ohmic
PMOS switch
VCC
ISP1130
OCn/DPGLn
IOC
Power switches 1 and 2 are low-ohmic PMOS devices as specified in
Section 13.2
.
Fig 11. Hybrid-powered hub; individual port power switching; individual overcurrent detection.
handbook, full pagewidth
MBL162
PSW1
PSW2
OC1/DPGL1
OC2/DPGL2
5 V
POWER SUPPLY
±
3%
1
+
VBUS
D
+
D
GND
SHIELD
+
4.85 V(min)
+
4.85 V(min)
+
4.75 V
(min)
1
2
VBUS
D
+
D
GND
SHIELD
+
4.75 V
(min)
2
VCC
GND
330 k
(2
×
)
downstream
ports
ISP1130
120
μ
F
ferrite bead
120
μ
F
ferrite bead
low-ohmic
PMOS switch
10 k
0.1
μ
F
low-ohmic
PMOS switch
10 k
0.1
μ
F
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相關代理商/技術參數(shù)
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