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10.6.2
Table of States of a Full-bridge
The following table shows an overview of the possible switching states of the
four MOSFET switches of a Full-bridge depending on the control signals of the
half-bridge channel group described above and the Half-bridges (see Fig. 10-1
on page 59).
Enable
PS n/n+1 PS n
0
1
1
1
1
10.7
Electrical Isolation
The separate operating voltage of the Half-bridges (power stages) is internally
electrically isolated from the operating voltage of the module.
The six Half-bridges "PS 1" to "PS 6" are not electrically isolated against each
other. The digital input channels are electrically isolated together as channel
group to the supply voltage of the module and as channel group to the housing
of the module.
10.8
Protection of the Assembly
10.8.1
Protection of the Half-bridges
Each of the six Half-bridges is protected against overcurrent or short-circuit.
10.8.2
Safeguarding the "PS" total Assembly
The PS total assembly ("PS 1" to "PS 6"), but not the Individual power stages or
power stage groups, is protected against the (external) supply voltage and
against ground with an electronic assembly in the module in each case. Defec-
tive electronic protection assemblies cannot be replaced by the user. Please
return defective modules to ETAS.
Notes about the procedure are available from the local ETAS sales and service
locations. The contact information is located in the chapter 16 on page 133.
10.8.3
Protection in the CBAV422.1 Cable
The external operating voltage for the power stages total assembly ("PS 1" to
"PS 6") is equipped with a replaceable fuse in the CBAV422.1 cable (see chapter
14.2.3 on page 118).
ES930.1 - User Guide
Control
Control
Power stage n
PS n+1
Low-side
switch
x
x
Off
0
0
Off
1
0
On
0
1
Off
1
1
On
Half-bridges ("PS" Connection)
Power stage n+1
High-side
Low-side
switch
switch
Off
Off
On
Off
Off
Off
On
On
Off
On
High-side
switch
Off
On
On
Off
Off
65
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