IRS26310DJPbF
Supply Capacitor:
It is recommended to place a bypass capacitor (C IN ) between the V CC and V SS pins.
This
connection is shown in Figure 35. A ceramic 1 μF ceramic capacitor is suitable for most applications.
component should be placed as close as possible to the pins in order to reduce parasitic elements.
V cc
HIN (x3)
V B (x3)
LIN (x3)
HO (x3)
EN
This
FAULT
V S (x3)
C IN
RCIN
ITRIP
LO (x3)
V SS
COM
Figure 35: Supply capacitor
Routing and Placement: Power stage PCB parasitic elements can contribute to large negative voltage transients at
the switch node; it is recommended to limit the phase voltage negative transients. In order to avoid such conditions, it
is recommended to 1) minimize the high-side emitter to low-side collector distance, and 2) minimize the low-side
emitter to negative bus rail stray inductance. However, where negative V S spikes remain excessive, further steps
may be taken to reduce the spike. This includes placing a resistor (5 or less) between the V S pin and the switch
node (see Figure 36), and in some cases using a clamping diode between V SS and V S (see Figure 37). See DT04-4
at www.irf.com for more detailed information.
www.irf.com
Figure 36: V S resistor
33
Figure 37: V S clamping diode
? 2008 International Rectifier
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