Broadcom ACPL-337J, Справочное руководство

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Broadcom ACPL-337J-EB600-RM100
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ACPL-337J Reference Manual Infineon EasyPIM™ 1B IGBT Module EB600-337J Evaluation Board
4.3 DC Bus and Discharge Resistors
The DC bus capacitor bank on the EB600-337J consists of 2 × 470-µF, 450V electrolytic capacitors 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 a
high-quality DC bus for full inverter utilization. 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: Disposition of the Gate Resistors
4.4 IGBT Current Measurement
To enable users to obtain a semiconductor current waveform during switching instances, the board is designed with two
dedicated holes mechanically positioned to cover the traces connecting the low-side emitters and the negative potential of
the DC bus capacitors, as shown in
Figure 14 . Holes with ɸ = 5 mm enable using a Rogowski current probe for current
measurement purposes.
Figure 14: Dedicated Holes Enable Users to Measure the Current of the Single IGBT