FAN7384 Datasheet, PDF (15/17 Pages) Fairchild Semiconductor – Half-Bridge Gate-Drive IC

2. Layout Considerations
For optimum performance, considerations must be taken
during printed circuit board (PCB) layout.
2.1 Supply Capacitors
If the output stages are able to quickly turn on a switch-
ing device with a high value of current, the supply capac-
itors must be placed as close as possible to the device
pins (V_DD and GND for the ground-tied supply, V_B and
V_S for the floating supply) to minimize parasitic induc-
tance and resistance.
2.2 Gate-Drive Loop
Current loops behave like antennae, able to receive and
transmit noise. To reduce the noise coupling/emission
and improve the power switch turn-on and off perfor-
mance, gate-drive loops must be reduced as much as
possible.
2.3 Ground Plane
To minimize noise coupling, the ground plane should not
be placed under or near the high-voltage floating side.
© 2006 Fairchild Semiconductor Corporation
FAN7384 Rev. 1.0.3
15
www.fairchildsemi.com