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EVBD4400
OPERATION:
For performance evaluation and power
system design please note the following:
a) The assembled board can be ran with the
IXDP630/631 removed by applying comple-
mentary 5V square waves with proper "dead
time" to the input pins INL (P1-3) and INH (P1-
2).
For standard IXDP630 operation, R17
and C22 have been loaded with their respec-
tive values represented on the bill of materi-
als. These values are for demonstration and
may not be appropriate for your application.
Change values as needed. For IXDP631
operation, load R17, C22, C23 with the rec-
ommended load components as outlined in
the IXDP630/631 data sheet along with the
crystal at the frequency of choice. R17 and
C22 serve a dual purpose depending on
which dead timer is selected.
The IXDP630 is hardwired for phase
'R' operation, see 630/631 data sheet, with
pins OUTENA, ENAR, and RESET tied high.
PWM drive input signal for ' R' phase is
applied to P1-6.
To add phases 'S' and / or 'T', enable
phases with jumpers at JP1 and/or JP2 and
apply PWM phase drive signals to TP7 and/
or TP8 taking the respective complementary
outputs from TP3 through TP6. Note that
TP1-TP15 are through-hole pads that have
been added to the board to serve as conve-
nient solder and / or test points.
If additional 'slave' boards are to be
used for mutiple phase operation, R17 -
R19, C20 - C23, and Y1 do not need to be
b) Be careful with ground connections.
Avoid ground loops. In general, connect the
grounds as shown in Figure 4 to minimize
ground bounce effects. This is particularly
important when three "High/Low side driver
design kits" are connected together with a
single IXDP630 to form a three phase drive
system, such as that shown in Figure 5.
c) Before using the PCB at full power or at-
tempting a short circuit test, make sure that a
proper high voltage electroytic capacitor is
connected between DC BUS and GND as
shown in Figure 4. The leads to this capacitor
should be as short as possible to minimize any
stray inductance.
d) Figure 4 shows the load terminated at point
A. This point could be connected to a number of
places depending on the application. For ex-
ample: Connection to ground will test the high
side device. Connection to DC BUS will test the
low side device. It could also be connected to
the center point of a capacitive divider (UPS
systems).
e) Figure 5 shows a three phase power system
implementation with a load configured in a Y
(star). It could also be configured in a DELTA
configuration. Please note the grounding
scheme. Cut the connection between "ground
plane 2" and "ground plane 4" on the compo-
nents side of the PCB and solder a 10 Ohm
resistor between these ground planes. The GND
of each board is terminated to a single ground
point.
installed on the addtional slave boards.
5
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