Application Note CAN-1200 Date: 8/6/15 Rev 0 1. Introduction For converting the CREE half bridge evaluation board (P/N CRD8FF1217P-1) found in evaluation kits (P/N KIT8020CRD8FF1217P-1) to use the new 900V Gen3 MOSFET (P/N C3M0065090D). The conversion can be made by only replacing a few components on the board. The change is necessary due to the differences in gate drive requirements between the Gen2 (+20/-5) and Gen3 MOSFETs (+15/-3V). 2. Parts List The following new parts referenced in Table 1 are needed to replace the components on the evaluation board to properly drive the new CREE Gen3 MOSFET. Please reference the schematic for the evaluation board in the Kit user manual or see Figure 5 where the affected components are highlighted in red. Table 1 Components list to make the conversion to use C3M0065090D MOSFET. Ref. No. Q2, Q1 U4, U3 Alt. U4, U3 ZD1, ZD4 ZD3, ZD6 ZD7, ZD8 R1, R2, R6, R7 Mfg. CREE Murata Mornsun Diodes Inc. ON Semi ON Semi Any Mfg. P/N C3M0065090D MEJ2D1209SC G1209S-2W DDZ18C-7 MMSZ3V0T1G MMSZ4706T1G Generic Description 900V, 65 mohm Gen3 MOSFET 12V, +/-9V, 2W iso power supply 12V, +/-9V, 2W iso power supply 18V Zener 3V Zener 19V Zener 4 Ohm, 1%, 1206 pkg. resistor QTY 1 or 2 2 2 2 2 2 4 3. Testing After replacing the components the test board is now ready to be used for evaluating the C3M MOSFET. Please follow the directions and safety notes as stated in the User’s Manual for KIT8020CRD8FF1217P-1. In Figure 1 below is an example test circuit with critical output waveforms shown in Figures 2. Detailed waveforms of turn-on and turn off are shown in Figure 3 and 4 respectively. Figure 1 Double pulse test circuit. © Cree Inc. 2015 / Form Rev0.0 Figure 2 Double pulse test waveform. Page |1 Application Note CAN-1200 Date: 8/6/15 Rev 0 Figure 3 MOSFET Turn-on characteristic. Figure 4 MOSFET Turn-Off Characteristic. 4. Schematic Reference C Figure 5 Evaluation board schematic for board CRD8FF1217P-1. REE reserves the right to make changes without further notice herein to improve reliability, function or design. Information furnished in this document is believed to be accurate and reliable. However, no representation or warranty is given and no liability is assumed with respect to the accuracy or use of such information, including without limitation, warranties of non-infringement of intellectual property rights of any third party. CREE does not assume any liability arising out of the application or use of any product or circuit described herein. Furthermore, this technical information may not be considered as an assurance of component characteristics. This document supersedes and replaces all information previously supplied and may be superseded by updates without further notice. © Cree Inc. 2015 / Form Rev0.0 Page |2