Trinamic TMC603-EVAL evaluation Board TMC603-EVAL 데이터 시트
제품 코드
TMC603-EVAL
TMC603-EVAL MANUAL (V. 1.01 / April 14th, 2009)
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Copyright © 2009 TRINAMIC Motion Control GmbH & Co. KG
Note:
For the first TMC603 evaluation boards (version 1.00 and 1.10), the current measurement is sub-optimal
due to a PCB layout mistake. This leads to a noise signal on the current measurement signals of the
TMC603. It is fixed by a wire on the first evaluation boards. Some very first boards have been delivered
without the fixing wire. Actual boards will be delivered with this fixing wire.
In the PCB layout the track width between the source connector of the N-Channel MOSFET transistors
(T301, T302, T303) and the shunt resistor R301 is dimensioned too small (Figure 19). This leads to a
very high resistance in the ratio of the drain-source on-state resistance R
For the first TMC603 evaluation boards (version 1.00 and 1.10), the current measurement is sub-optimal
due to a PCB layout mistake. This leads to a noise signal on the current measurement signals of the
TMC603. It is fixed by a wire on the first evaluation boards. Some very first boards have been delivered
without the fixing wire. Actual boards will be delivered with this fixing wire.
In the PCB layout the track width between the source connector of the N-Channel MOSFET transistors
(T301, T302, T303) and the shunt resistor R301 is dimensioned too small (Figure 19). This leads to a
very high resistance in the ratio of the drain-source on-state resistance R
DS(on)
. If the resistance of the
track is higher than 1% of the R
DS(on)
, it will have an effect on the current measurement signals. The shunt
resistor R301 will also have an effect on the current measurement, although the shunt resistor is
bypassed by the jumpers X302 and X303.
If you use one of the first evaluation boards without the fixing wire, please connect on the bottom side the
source connector of the N-Channel MOSFET transistors (T301, T302, T303) to ground as shown in
Figure 20 by using a wide wire. The width should be more than 0.85 mm.
bypassed by the jumpers X302 and X303.
If you use one of the first evaluation boards without the fixing wire, please connect on the bottom side the
source connector of the N-Channel MOSFET transistors (T301, T302, T303) to ground as shown in
Figure 20 by using a wide wire. The width should be more than 0.85 mm.
Figure 19: Layout detail of TMC603-Eval
Figure 20: Detail of layout shows the solution
Layout consideration:
For your own layout, please take into account that the track width is wide enough between the source
connectors of the N-Channel MOSFET transistors and ground. The resistance of this track should be
less than 1% of the drain-source on-state resistance R
DS(on)
of the N-Channel MOSFET transistors. In an
example this shall be explain. If the resistance R
DS(on)
is 50m , the maximum resistance of the track
should be less than 0.5m . The optimum solution is to connect the source of the N-Channel MOSFET
transistors to a ground plain.
transistors to a ground plain.