User Manual

Page 59
ICE Module
USB0+/- through USB4+/- from the COM Express Module are routed through a
common mode choke to reduce radiated cable emissions. The part shown is a AXIS
POWER BCCUB-T4P-2012-900T; this device has a common mode impedance of
approximately 90 Ω at 100MHz. The common-mode choke should be placed close to
the USB connector.
ESD protection diodes D10、D11 and D12 provide over-voltage protection caused by
ESD and electrical fast transients. Low capacitance diodes and transient voltage
suppression diodes should be placed near the USB connector. The example design
uses a RailClamp SRV05-4 low capacitance TVS Diode Array
from Semtech
(
http://www.semtech.com).
USB0+3
CN26
U1
U2
U3
U4
U
5
U6
U7
U8
H3
H
5
H4 H6
V1.01 Modify
+V5_ USB3
U31
MIC 202 6
ENA
1
FLGA
2
FLGB
3
ENB
4
OUTB
5
GND
6
IN
7
OUTA
8
USB1- 3
USB1+ 3
HEADER_2X4_2.54
USB1
1
3 4
2
5 6
87
FB33
GCB1608K-300
USB Port0~6
IO_GND
+V5_US B3
L20
COMCHOKE_8_USB
1
4
2
3
USB3-_R
C182 0.1U _4_Y_16 V
USB3+_R
+V5_USB 01
IO_GND
C181 0.1U _4_Y_16 V
USB3+ 3
USB Power control
L19
COMCHOKE_8_USB
1
4
2
3
+V5_ USB1
USB4-_R
USB4+_R
+V5_USB4
USB3- 3U32
MIC 202 6
ENA
1
FLGA
2
FLGB
3
ENB
4
OUTB
5
GND
6
IN
7
OUTA
8
IO_GND
FB36
GCB1608K-300
+V5_ USB2
U33
MIC 202 6
ENA
1
FLGA
2
FLGB
3
ENB
4
OUTB
5
GND
6
IN
7
OUTA
8
FB37
GCB1608K-300
C183 0.1U _4_Y_16 V
+V5_USB 23
USB2+_R
USB2-_R USB3-_R
D11
PACDN006
1
2
3 4
5
6
USB3+_R
IO_GND
FB6
GCB1608K-300
IO_GND
+
C287
150U_TN C_SMD_6V3
1
2
USB for ESD Protect
+
C288
150U_TN C_SMD_6V3
1
2
IO_GND
USB1+_R
+V5_USB1
L17
COMCHOKE_8_USB
1
4
2
3
USB1-_R
LAN_USB1B
LJ- G40BU 1- 10
VCC1
1
D1-
2
D1+
3
GND1
4
VCC2
5
D2-
6
D2+
7
GND2
8
USB0-_R USB1-_R
D10
PACDN006
1
2
3 4
5
6
USB1+_RUSB0+_R
+V5_ USB4
+V5_USB0
USB0+_R
L16
COMCHOKE_8_USB
1
4
2
3
+
C286
150U_TN C_SMD_6V3
1
2
USB0-_R
IO_GND
+V5_ USB01
C184 0.1U _4_Y_16 V
+V5_USB 23
R249
@0_4
+V5_ USB5
USB5+ 3
USB5- 3
L21
COMCHOKE_8_USB
1
4
2
3
USB5-_R
USB5+_R
USB4+_R
USB4-_R USB5-_R
D12
PACDN006
1
2
3 4
5
6
USB5+_R
IO_GND
+V5_DU AL
C185 0.1U _4_Y_16 V
+V5_USB 45
+
C290
150U_TN C_SMD_6V3
1
2
USB4+3
+V5_ USB23
USB_4_5_OC#3
USB_2_3_OC#3
USB_0_1_OC#3
USB4-3
FB7
GCB1608K-300
R375
0_4
C186 0.1U _4_Y_16 V
+V5_USB 45
USB2-3
FB8
GCB1608K-300
+
C291
150U_TN C_SMD_6V3
1
2
+V5_US B5
IO_GND
USB2+_R
USB2-_R
L18
COMCHOKE_8_USB
1
4
2
3
+V5_ USB0
+V5_USB2
USB2+3
+V5_USB 01
+V5_ USB45
USB0-3
+
C289
150U_TN C_SMD_6V3
1
2
Figure 4-24: USB Reference Design