Broadcom ACPL-352J, Reference Manual

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Broadcom ACPL-352J-EB1200-RM100
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ACPL-352J Reference Manual Infineon EconoPIM™ 3 IGBT Module EB1200-352J Evaluation Board
To ensure the constraints described previously, the EB1200-352J comes with a 4.7Ω gate resistor for positive gating
connected to VOUTP and with 4.7Ω for negative gating connected to VOUTN as a default assembled variant. In addition,
evaluation board is designed to enable Broadcom customers to evaluate switching characteristics of the semiconductors by
changing or combining turn-on/turn-off resistors (as described in
Section 4.2.2, Gate Driver Circuit: High-Voltage Side ).
Figure 12 shows the disposition of the gate resistors.
Figure 12: Disposition of the Gate Resistors
4.3 DC Bus and Discharge Resistors
The DC bus capacitor bank on the EB1200-352J consists of 4 × 470-µF, 450V electrolytic capacitors, two in series
connection, a 1-µF, 850V film capacitor, and a 68-nF, 1200V ceramic capacitor, as shown in
Figure 13 . These components
are added to the design to simplify the evaluation of the gate driver and the semiconductor switching characteristics and to
provide high quality DC bus for full inverter utilization. In addition, board is designed to support four more electrolytic
capacitors to enable easy estimation of the inverter characteristics on demanding loads. For an appropriate voltage sharing
on series-connected electrolytic capacitors and safety discharging purposes, two ceramic 39-kΩ resistors are connected in
parallel to each electrolytic capacitor (
Figure 13 ).
Figure 13: DC Bus Capacitor Bank with Discharge Resistors. Capacitors C70, C71, C73, and C75 are not populated.