Rohm P04SCT4018KE-EVK-001 User Manual Download Page 1 | Manualshive

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4

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Generation SiC MOSFET

Half Bridge Evaluation Board

User’s Manual

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Summary of Contents for P04SCT4018KE-EVK-001

Page 1: ...4th Generation SiC MOSFET Half Bridge Evaluation Board User s Manual Downloaded From Oneyac com...

Page 2: ...r life threatening injury Never touch the board with bare hands or bring it too close to your hand Also be careful when working with conductive instruments such as tweezers or screwdrivers as describe...

Page 3: ...7 4L For detailed information on product specifications please refer to 4th generation SiC MOSFET Evaluation Board Product Specifications 1 Introduction Since this board has multiple voltage and signa...

Page 4: ...a default setting surely other devices in TO 247N or TO 247 4L packages can also be mounted and evaluated In this case change the gate drive circuit constants according to the characteristics of each...

Page 5: ...a number of LEDs to make it easy to monitor the board s operating status The approximate locations of the LEDs are shown in Figure 2 and their details are shown in Table 2 a PCB004P for TO 247N b PCB...

Page 6: ...igure 3 Connector pin assignment Top view Silkscreen notation LED LED lighting Details HV alive Red Lit The LED lights up when there is a voltage of 20 V or more in the high voltage power supply HVdc...

Page 7: ...n open it is pulled down with a 2 2 k resistor 02 SGND Input signal side GND Completely separated from the DUT side GND CN101 01 IN_L_CLK I Signal to turn on off the L side MOSFET Turns on when at H l...

Page 8: ...the variable resistors RV51 and RV151 Rotating the variable resistors clockwise increases the output voltage 4 2 How to adjust the negative bias VEE2 The negative bias VEE2 which is the bias voltage...

Page 9: ...8 27 TO 247N 4L Half Bridge Evaluation Board User s Guide 2022 ROHM Co Ltd No 63UG059J Rev 001 2022 2 Figure 5 Gate drive power supply circuit HS side VCC2 SOURCE VEE GND2 Downloaded From Oneyac com...

Page 10: ...nal of the ROHM MOSFET driver IC BM61M41RFV C directly drives the MOSFET via the gate resistor Since the pattern inductance of the driver circuit affects the surge voltage characteristics of the gate...

Page 11: ...verse If the anode is connected to the OUT pin of the driver IC U2 the turn on speed can be increased so it can be used in different ways depending on the characteristics of the device used Figure 7 G...

Page 12: ...rrent at the drain pin and the L side can measure the current at the power source side Figure 9 shows the appearance of the probe related connections during measurement and the enlarged photo shows th...

Page 13: ...parison of the characteristics of a general Rogowski type current probe and a coaxial type shunt resistor While the Rogowski type has a measurement bandwidth of several tens of MHz the coaxial type su...

Page 14: ...f the device itself reaches several tens of Watts To install a heat sink the device must be mounted on the solder side The DUT is laid out on the same side so that the commutation device can also be i...

Page 15: ...2022 ROHM Co Ltd No 63UG059J Rev 001 2022 2 Figure 14 Measurement view of heat sink installation Figure 15 Efficiency SCT4036KR BUCK Rg 3 3 DUT Mounted on the solder side Inductor Heat Sink Input Bulk...

Page 16: ...L Inductor value H TDP_TTL Total time of double pulse signal s Normally the double pulse signal is a single shot but when it is applied periodically it is necessary to ensure sufficient reset time fo...

Page 17: ...ing the external CLK signal to the IN_L_CLK pin CN101 pin 1 the procedure is the same as for the H side Pulse Generator 5V output PGND HVdc DUT_HS DUT_LS HS GADJ LS GADJ IN_H_CLK IN_L_CLK LDO Vcc1 DCR...

Page 18: ...Turn on the HVdc power supply Adjust the output current with an electronic load device In CCM mode where the inductor current is continuous the output voltage will be approximately as follows Vout Vi...

Page 19: ...HVdc power supply When the AC output is on the side the H side switches and when it is on the side the L side switches and by controlling the duty cycle of the CLK signal a sinusoidal voltage is outpu...

Page 20: ...tor and input the CLK signal Turn on the HVdc power supply Adjust the output current with an electronic load device In CCM mode where the inductor current is continuous the output voltage will be appr...

Page 21: ...m and an example of its mounting a Circuit diagram b Mounting example PCB005P H side Figure 21 RCD non discharge snubber circuit Q51 Q151 PGND SCT4090KRKR 1200V 90m SCT4090KR 1200V 90m 33nF 1000V 5750...

Page 22: ...her hand the capacitance CSNB of the snubber capacitor is calculated from the energy stored in the inductance by the following equation Where VHVdc is the high voltage power supply and VSURGE is the m...

Page 23: ...e suppression D54 C64 D154 C164 During turn off operation of the MOSFET in bridge configuration a negative surge occurs in VGS of the non switching side MOSFET which may exceed the maximum rating Ther...

Page 24: ...line length between the MC pin and the MOSFET II Negative surge clamp circuit I Positive surge clamp circuit IV Additional capacitance between GS CGS Figure 24 shows an example of a protective circui...

Page 25: ...side the third is VDS on the H side and the bottom waveform is ID on the H side The gate source pin surge is positive on the H side during turn on and negative on the HS and L sides during turn off S...

Page 26: ...age is applied to the HVdc PGND pins check that LED301 red is lit If the LED does not light up check the applied voltage source and wiring The LED lights up when the input output voltage is approximat...

Page 27: ...thods Application Note No 62AN0036JRev 001 ROHM Co Ltd June 2019 https fscdn rohm com en products databook applinote discrete sic mosfet sic mos_snubber_circuit_design_an e pdf 4 Improvement of Switch...

Page 28: ...nformation 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 below please...

Page 29: ...ROHM Semiconductor Downloaded From Oneyac com...

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