IR2177 International Rectifier Corp., IR2177 Datasheet - Page 19

• Manufacturer Part Number: IR2177
• Description: Phase Current Sensor Ic For Ac Motor Control
• Manufacturer: International Rectifier Corp.

3
3.1 Distance from H to L voltage
The
maximizes the distance between floating (from DC-
to DC+) and low voltage pins (V
recommended to place components tied to floating
voltage in the respective high voltage portions of the
device (V
3.2 Ground plane
Ground plane must NOT be placed under or nearby
the high voltage floating side to minimize noise
coupling.
19
Vin+
Vin-
VB
VS
IR2277S/IR2177S
PCB LAYOUT TIPS
B
, V
Figure 21: antenna loops
S
) side.
package
Antenna
Loop
SS
). It is strongly
(wide
body)
3.3 Antenna loops and inputs
connection
Current loops behave like antennas able to receive
EM noise. In order to reduce EM coupling loops
must be reduced as much as possible. Figure 21
shows the high side shunt loops.
Moreover it is strongly suggested to use Kelvin
connections for V
connect V
explained in Fig. 22.
3.4 Supply capacitors
The supply capacitors must be placed as close as
possible to the device pins (V
ground tied supply, V
supply) in order to minimize parasitic traces
inductance/resistance
Figure 22: Recommended shunt connection
V in +
V in -
V B
V S
S
to V
in+
in-
IR2277S/IR2177S(PbF)
and V
close to the shunt resistor as
B
in-
and V
to shunt paths and star-
CC
S
and V
for the floating
www.irf.com
SS
for the