Datasheet

18 of 24

V 2.21

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2020-07-07

2ED2181 (4) S06F (J)

650 V high-side and low-side driver with integrated bootstrap diode

5.13

PCB layout tips

Distance between high and low voltage components: It’s strongly recommended to place the components tied

Case Outline information in this datasheet for the details.

Ground Plane: In order to minimize noise coupling, the ground plane should not be placed under or near the high

voltage floating side.

Gate Drive Loops: Current loops behave like antennas and are able to receive and transmit EM noise (see Figure

21). In order to reduce the EM coupling and improve the power switch turn on/off performance, the gate drive

loops must be reduced as much as possible. Moreover, current can be injected inside the gate drive loop via the

IGBT collector-to-gate parasitic capacitance. The parasitic auto-inductance of the gate loop contributes to

developing a voltage across the gate-emitter, thus increasing the possibility of a self turn-on effect.

Figure 21

Avoid antenna loops

1μF ceramic capacitor is suitable for most applications. This component should be placed as close as possible

to the pins in order to reduce parasitic elements.

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 VS spikes remain

excessive, further steps may be taken to reduce the spike. This includes placing a resistor (5 Ω or less) between

the VS pin and the switch node (see Figure 22 - A), and in some cases using a clamping diode between COM and

Figure 22