Rohm TO-247N Скачать руководство пользователя страница 2

1/27

TO-247N(-4L) Half-Bridge Evaluation Board 

User’s Guide 

© 2022 ROHM Co., Ltd.

 

No. 63UG0

60E

 

Rev.001

 

2022.2

 

<High Voltage Precautions> 

Before you start operation!

This  document  describes  only  how  to  handle  evaluation  boards  for 

SiC  MOSFETs 

(

P04SCT4018KE-EVK-001, P05SCT4018KR-EVK-001

). 

  Please refer to the product specifications for detailed information on schematics, BOM, 

layout, etc. 

In order to ensure safe operation, please read this document thoroughly 

before using the evaluation board! 

Also, depending on the voltage used and the structure of the board,

life-threatening voltages may be generated. 

Be sure to strictly observe the precautions in the box below. 

<Before Use> 

Make sure that no parts are damaged or missing, for example because the board has been dropped.

Make sure that no conductive objects have fallen on the board.

When soldering the module to the evaluation board, be careful of solder splattering.

Make sure that there is no condensation or water droplets on the board.

<During Energization>

Make sure that no conductive objects come into contact with the board.

During  operation,  even  a  brief  accidental  contact  or  discharge  due  to  bringing  your
hand near the board may result in serious or 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 

described above. 

If  a  higher  voltage  than  the  rated  voltage  is  applied,  the  parts  may  explode  depending  on  the
specification conditions such as short circuit. Also consider the danger of parts scattering.

During  operation,  be  careful  of  discoloration  of  the  board  and  components  due  to  heat,  liquid
leakage, etc., and condensation when evaluating at low temperature.

<After Use>

 

The evaluation board may contain a circuit that stores high voltage. Even if the connected power
supply circuit is disconnected, it still stores electric charge, so be sure to discharge it after use and
confirm that it is discharged before handling.

Be careful of burns, etc. caused by contact with overheated components.

This evaluation board is to be used in research and development facilities and

 can only be 

used by persons who are authorized to handle high voltage in  each facility.

 When 

working with high voltages, it is recommended to install signage such as “high voltage work 
underway,” to use a cover with interlocks, etc., and to wear protective goggles to ensure a 
safe working environment. Please read the cautionary note on 

short circuit protection 

for 

this board at the beginning of this document. 

Содержание TO-247N

Страница 1: ...4th Generation SiC MOSFET Half Bridge Evaluation Board User s Manual...

Страница 2: ...in serious or 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 screwdriver...

Страница 3: ...kage and TO 247 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 vol...

Страница 4: ...SCT4018KR as 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 characteris...

Страница 5: ...equipped with 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...

Страница 6: ...ng connector Figure 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 powe...

Страница 7: ...at H level When 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...

Страница 8: ...e adjusted by 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...

Страница 9: ...8 27 TO 247N 4L Half Bridge Evaluation Board User s Guide 2022 ROHM Co Ltd No 63UG060E Rev 001 2022 2 Figure 5 Gate drive power supply circuit HS side VCC2 SOURCE VEE GND2...

Страница 10: ...he output signal 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...

Страница 11: ...mounted in reverse 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 us...

Страница 12: ...easure the current 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 p...

Страница 13: ...6 shows a comparison 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 co...

Страница 14: ...consumption of 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...

Страница 15: ...User s Guide 2022 ROHM Co Ltd No 63UG060E 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 Si...

Страница 16: ...lied voltage V 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...

Страница 17: ...r and connecting 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...

Страница 18: ...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 approximately as f...

Страница 19: ...high voltage 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 vo...

Страница 20: ...e pulse generator 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 voltag...

Страница 21: ...circuit diagram 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 3...

Страница 22: ...SFET On the other 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 V...

Страница 23: ...Negative surge 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 maxim...

Страница 24: ...g the pattern 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 prot...

Страница 25: ...s VGS on the L 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 dur...

Страница 26: ...up When voltage 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...

Страница 27: ...cuit Design Methods 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 Improve...

Страница 28: ...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...

Отзывы: