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© 2022 ROHM Co., Ltd.

 

No. 65UG002E Rev.001

 

Apr.  2022

 

User’s  Guide 

High Voltage Safety Precautions

 

 

 Read all safety precautions before use 

 

    Please note that this document covers only the SCT4036KW7 evaluation board and its functions. For additional information, please 

refer to the datasheet.   

 

 
To ensure safe operation, please carefully read all precautions before handling 
the evaluation board 

 

 

 
Depending on the configuration of the board and voltages used,

   

 

Potentially lethal voltages may be generated. 

 

Therefore, please make sure to read and observe all safety precautions described in the red box 

below.

 

 

Before Use

 

[1]  Verify that the parts/components are not damaged or missing (i.e. due to the drops).

 

 

[2]  Check that there are no conductive foreign objects on the board.   
[3]  Be careful when performing soldering on the module and/or evaluation board to ensure that 

solder splash does not occur. 

[4]  Check that there is no condensation or water droplets on the circuit board.   

   
  During Use 

[5]  Be careful to not allow conductive objects to come into contact with the board.   

[6] 

Brief accidental contact or even bringing 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 mentioned above please exercise extreme caution when using conductive tools 

such as tweezers and screwdrivers. 

[7]  If used under conditions beyond its rated voltage, it may cause defects such as short-circuit or, 

depending on the circumstances, explosion or other permanent damages. 

[8]  Be sure to wear insulated gloves when handling is required during operation. 

   
  After Use 

[9]  The ROHM Evaluation Board contains the circuits which store the high voltage. Since it stores 

the charges even after the connected power circuits are cut, please discharge the electricity 
after using it, and please deal with it after confirming such electric discharge. 

[10] Protect against electric shocks by wearing insulated gloves when handling. 

 

This evaluation board is intended for use only in research and development facilities and should by handled 

only by qualified personnel 

familiar with all safety and operating procedures.

 We recommend carrying out operation in a safe environment that includes the use 

of signs such as “high voltage test underway”, using a cover with safety interlocks and wearing protective goggles. 

 

 

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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