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© 2022 ROHM Co., Ltd.

 

No. 65UG002E Rev.001

 

Apr.  2022

 

User’s  Guide 

Evaluation board for SiC MOSFET SCT4036KW7 

HB2637L-EVK-301 

This manual explains how to use the evaluation board HB2637L-EVK-301 with ROHM’s 4

th

 generation SiC MOSFETs with TO-263-7L package.   

 

The evaluation board is configured in a half bridge set up and thus allows evaluations in different operations modes such as buck, boost, syn-

chronous  buck/boost  and  inverter  operations.  The  board  is  equipped  with  two  SiC  MOSFETs  (SCT4036KW7),  isolated  gate  driver 

BM61S41RFV-C, isolated power supply required for the gate driver, LDO for 5V supply and easy to interface connectors for PWM signals.   

This user guide contains a schematic of the evaluation board, a Bill of Material list (BOM) and also description on the overall functioning of the 

evaluation board. Additionally, the user guide contains important notices and warnings that need to be carefully reviewed prior to use of the board.   

 

 

 

 
 
Important Notice 

This evaluation board is intended for 

product evaluation in a research and development context only

 and is not intended for 

resale to end consumers and it is not authorized for end customer or household use. This board may not comply with CE or similar 

standards (including, but not limited to the EMC directive 2004/EC/108) and may not fulfil other requirements of the country it will 

be operated in by the user. The user shall ensure that the evaluation board will be handled in a way that is compliant with all the 

standards and regulations in the country it will be operated in. 

 

The evaluation board provided here has only been subjected to functional testing under typical load conditions. The design of this 

evaluation board is tested by ROHM only as described in the user guide for this board. The design is not qualified in terms of 

safety requirements, manufacturing and operation over the entire operating temperature range or lifetime. 

 

This evaluation board may only be used by authorized personnel that is properly trained in recognizing and dealing with 

the dangers of testing high voltage equipment and generally experimenting with high voltage circuits.

 Ensure you review 

this user guide as it contains important safety warnings. At all times, follow the applicable safety rules for dealing with high voltages. 

Do not connect or disconnect any wires or probes to the evaluation board, while it is connected to a power supply. Take care that 

capacitors on the board have discharged fully before touching any part of  the board. Always place the evaluation board under 

appropriate covers, such as in a Perspex box, to protect against accidental touching of high voltage parts BEFORE applying a 

voltage supply to the board.     

 

This evaluation board does not have a short circuit protection function for the evaluation device. 
Therefore, even with the normal evaluation method, if the usage deviates from the electrical specifica-
tions (maximum current, etc.) of the evaluation device selected by the customer, the device may be 
severely damaged with a popping sound. Therefore, never use the evaluation board in a way that de-
viates from the specifications of the evaluation device. Also, take precautions to prevent fragments 
from scattering and use protective equipment in case severe damage occurs. 

Summary of Contents for TO-263-7L

Page 1: ...4th Generation SiC MOSFET TO 263 7L Half Bridge Evaluation Board User s Guide...

Page 2: ...nging your hand close to the board may result in discharge and lead to severe injury or death Therefore DO NOT touch the board with your bare hands or bring them too close to the board In addition as...

Page 3: ...in The evaluation board provided here has only been subjected to functional testing under typical load conditions The design of this evaluation board is tested by ROHM only as described in the user gu...

Page 4: ...nnector Assignments 5 3 2 LED Indications 6 3 3 Isolated Power Supply and setting the gate drive voltage 8 3 4 Setting the gate resistors 10 3 5 Test point locations 10 3 6 Device current measurement...

Page 5: ...e discharged to a safe level Warning Ensure that you use only appropriate measurement equipment for the voltage levels pre sent on the board Ensure not to ground live parts through unsuitable measurem...

Page 6: ...e used with this board will be introduced in a later section of this manual Figure 1 Evaluation board without heatsink left and with heatsink right With this board the following tests are possible 1 D...

Page 7: ...rivers The other two are the isolated power supplies required to supply the HV side of the isolated gate drivers The isolated power supply is realized with a simple half bridge converter that outputs...

Page 8: ...DC and switch node respectively Figure 4 Top view of the board with all connectors marked 3 2 LED Indications A total of three power supplies are generated on the board The board has a LDO for generat...

Page 9: ...ive voltage the input supply on the CO1 has to be adjusted accordingly The recommended gate source voltage of ROHM SiC MOSFET SCT4036KW is 15 18V However driving with 18V proves to be more efficient F...

Page 10: ...egative gate turn off is chosen jumpers J3 and J4 can be used to select between 1 5V or 3V for high side device and low side device respectively In Figure 6 various configurations are shown on how to...

Page 11: ...C which is 100V ns Users can adjust the gate resistor value to their wish as per the application requirements Additional gate source capacitance C27 C28 has been provided to control the di dt of the...

Page 12: ...headers that act as receptacles can be soldered on test points TP3 TP4 TP5 and TP6 Figure 9 shows the locations of the test points on the board Figure 9 Top view of the board with the test point loca...

Page 13: ...device current measurements As shown in Figure 10 on jumper J1 co axial shunt can be soldered It must be noted that a low inductive co axial shunt must be used for measure ments otherwise unnecessary...

Page 14: ...with exposed copper and filled capped vias The recommended thermal interface sheets are SIL pad 2000 from Henkel adhesives or dual side stickable WL 404 11 from Fischer Elektronik The heatsink LAM 5 1...

Page 15: ...d For double pulse tests heatsink need not be mounted but for continuous operation heatsink might be needed 6 Supply 15 18V at the connector CO1 and check for correct polarity 7 Three LEDs 5V Supply H...

Page 16: ...however depending on the test current level an external bulk capacitor will be required to minimize the DC link voltage drop Set the required HVDC voltage and do not exceed above 900V For performing...

Page 17: ...Connect accordingly at the connector CO2 or use the BNC connector Choose the input capacitor output capacitor and inductor as per requirement Check the connections of input output capacitors inductor...

Page 18: ...18 23 User s Guide HB2637L EVK 301 2022 ROHM Co Ltd No 65UG002E Rev 001 Apr 2022 5 Schematic and BOM Figure 18 Schematic of the Power Supply Circuit...

Page 19: ...19 23 User s Guide HB2637L EVK 301 2022 ROHM Co Ltd No 65UG002E Rev 001 Apr 2022 Figure 19 Schematic of the Power Stage...

Page 20: ...AT54S 13 D7 D8 Zener diode 1000mW 5mA ROHM KDZVTF2 7B 14 D17 D18 Zener diode 1000mW 5mA ROHM KDZVTF2 0B 15 LED1 LED2 LED3 Green LED ROHM SML D13M8W ICs 16 IC1 LDO 3 42V 200mA ROHM BD540M2WEFJ 17 IC2 1...

Page 21: ...21 23 User s Guide HB2637L EVK 301 2022 ROHM Co Ltd No 65UG002E Rev 001 Apr 2022 6 PCB Layout Figure 20 Top Layer Figure 21 Inner Layer1...

Page 22: ...22 23 User s Guide HB2637L EVK 301 2022 ROHM Co Ltd No 65UG002E Rev 001 Apr 2022 Figure 22 Inner Layer2 Figure 23 Bottom Layer...

Page 23: ...23 23 User s Guide HB2637L EVK 301 2022 ROHM Co Ltd No 65UG002E Rev 001 Apr 2022 Figure 24 Silkscreen Top Figure 25 Silkscreen Bottom...

Page 24: ...ch technical information The Products specified in this document are not designed to be radiation tolerant For use of our Products in applications requiring a high degree of reliability as exemplified...

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