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NCV73810V2GEVB
Component
C VBAT1
C VBAT2
C VCC
C VIO
R WAKE1
R WAKE2
R BUS1
R BUS2
C BUS
CMC
Function
Decoupling Capacitor on Battery Line, Electrolytic
Decoupling Capacitor on Battery Line, Ceramic (XR7)
Decoupling Capacitor on V CC Supply Line, Ceramic (XR7) (Note 1)
Decoupling Capacitor on V IO Supply Line, Ceramic (XR7) (Note 1)
Pull?up Resistor on WAKE Pin
Serial Protection Resistor on WAKE Pin
Bus Termination Resistor (Note 2)
Bus Termination Resistor (Note 2)
Common?mode Stabilizing Capacitor (Note 3)
Common?mode Chokes (Note 4)
Min
Typ
10
100
100
100
33
3.3
47.5
47.5
4.7
100
Max
Units
m F
nF
nF
nF
k W
k W
W
W
nF
m H
1.
2.
3.
4.
To improve EMC performance, 2.2 m F ceramic decoupling capacitor is recommended.
Type 1206 ± 1%
Type 0805 ± 1%
Recommended common-mode chokes: EPCOS B82789C0104N00x, EPCOS B82799C0104N001, TDK ACT45R-101-2P-TLxxx,
TDK ACT45B-101-2P-TLxxx (x= don’t care).
SPECIFICATIONS
Power Supply
The Evaluation board can be power either via DC power supply input socket with plug diameter 2.1 mm and length 14 mm
or by one of the FlexRay bus connectors (See the connector description section). Maximum input voltage (42 V) is limited by
on-board voltage regulators input voltage range.
Split Termination
In order to achieve a better EMC performance, it is recommended to make use of a so-called split termination in all ECUs,
where the Termination resistance R T is split into two equal parts R TA and R TB [2].
ECU
BP
R TA
BD
C1 R1
R TB
BM
Figure 6. ECU with Split Termination [2]
The serial RC combination (R 1 ; C 1 ) at the centre tap of the split termination provides a termination to GND for common
mode signals. R 1 is preferably omitted. Typical values are given in the following table:
Table 5. TERMINATION PARAMETERS
Name
R1
C1
2 x ? R TA ? R TB ? / (R TA + R TB )
Description
Resistor
Capacitor
Matching of Termination Resistors
Typ
< 10
4700
≤ 2
Units
W
pF
%
For R TA and R TB the use of 1% tolerated resistors leads to a matching of 2%.
The better the matching of the split termination resistors R TA and R TB , the lower the electromagnetic emission.
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