User Guide EVAL-1ED020I12F2-DB
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v1.0
2021-06-21
EVAL-1ED020I12F2-DB user guide
Isolated driver daughter board to evaluate 1200 V CoolSiC™ MOSFET
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2
System and functional desription
2.1
Use of the daughterboard
The daughter board can be used in two different ways.
1.)
Stand-alone board
2.)
Usage together with motherboard
2.1.1
Stand-alone board
In the case of stand-alone usage, the application is structured in such a way that the following must be
developed: circuit board with corresponding plug connectors, galvanically isolated power supplies,
connections for the high-voltage power switches, and the connections for the low voltage side. The technical
parameters in Table 2 have to be considered. Please also note that there is an insulation gap between the low
voltage and the high voltage side, as shown in Figure 5.
2.1.2
Usage together with motherboard
If the motherboard, EVAL-PS-DP-MAIN, is used, commissioning is simple, as the daughterboard was specifically
designed to be used together with it. Figure 3 shows the top view of this motherboard.
Please read the data sheet for the motherboard before starting up.
The motherboard is divided into two sections: the primary supply side on the left and the power (high-voltage)
circuit indicated as secondary side on the right. They are separated by the white marker line. On the primary
side, four connectors are visible: X105, X102, X101 and X100. The 12 V supply voltage on the low-voltage side is
connected (red-colored, positive pole) to X102 and X105. Three other voltages for the two drivers are generated
from this 12 V power supply: VCC1, VCC2 and VEE2.
VCC2 and VEE2 are galvanically separated from each other and also from the other voltages.
The connector X100 connect the primary side of the mainboard and the primary side of the EVAL-1ED020I12F2-
DB which each other. All importand signals from EVAL-1ED020I12F2-DB like IN+, IN-, /Fault and /RDY of both
drivers will be provided via X100 from the motherboard to the EVAL-1ED020I12F2-DB. At the motherboard side
this signals are delivered from connector X101, which is the interface to the outside world, for example a
µController.
The EVAL-1ED020I12F2-DB is supplied with supply voltages VCC1, VCC2 and VEE2 via DC/DC converters. These
connectors are mounted on the motherboard and enable a flexible supply. The decision about which driving
voltages (VCC2 and VEE2) are to be connected to the EVAL-1ED020I12F2-DB via connectors X107 and X110 is
made via jumpers on the pin headers X108 (low-side) and X106 (high-side). VCC1 is provided via connector
X100.
The power supply can be configured with two jumpers on the high-side and two jumpers on the low-side
according to the requirements of the drivers at the EVAL-1ED020I12F2-DB or other daughterboards and the
downstream power switches.
The possible configurations for setting the driving voltages (VCC2 and VEE2) via two jumpers are visualized in
Table 3 and Figure 6.