thanks

I just wanted to find out where in the CAB5R0 SiC MOSFET module the NTC thermistor is placed? Does it measure the hotspot temperature of the power module? How far off is the actual junction temperature from the temperature of the measurement point of the NTC?

We previously designed an inverter based on CCB021M12FM3. Now we are planning a new inverter design with CCB016M12GM3T.

For PCB design purpose, we need the 3D CAD model of the module and an Altium footprint with the model embedded. Please share.

I noticed that the Vds-Ids characteristics in LTspice of the CAB760M12HM3 module differs quite a bit from the datasheet values. The first plot shows the module characteristics using the LTspice model. The break in the body diode curve is not in the model, I just did not collect datapoints below 200A. The second plot uses data from the plecs XML file (which is way closer to the datasheet). Especially the fact that the diode temperature curves are swapped (150°C is above the 25°C) is not possible in reality.

Not only the body diode behaves very strange in LTspice, also the Rdson seems a little different. Did anyone else observe this behavior?

Thanks

Since our application involves operation in a vacuum environment, we would like to confirm the electrical feasibility of this module under actual operating conditions.

At our operating condition, the absolute pressure will be around 0.2 nbar for around 200- 400 sec. We would like to understand whether this module can reliably withstand such a vacuum environment.

Additionally, could you please clarify the following points:

1. What material is used over the die (is it silicon gel or any other encapsulant)?
2. Is the module hermetically sealed?

Your clarification on the above will help us evaluate suitability for our application.

I also tried jumping them with a jumper wire, then I got the 5V between J5.1 and 4. Still no response. Pleease advise what could be the issue? Thanks.

Regarding the CRD25DA12N-FMC reference design, I have added CRD25DA12N-FMC-AFE-BOOST and CRD25DA12N-FMC-AFE-EMI, and I intend to use it as a 25kW rectifier with the TMDSCNCD280039C control card. At this point, what modifications do I need to make to the firmware and GUI you provided? If modifications are required, could you provide a detailed explanation on how to proceed? I have little experience in this area and would greatly appreciate your guidance!

Is it possible to purchase a replacement XM3 Controller V1R2 board for the CRD300DA12E-XM3?

Our team already access to an inverter development board, but are having issues communicating with the gate drivers. Our hope was to only purchase a replacement XM3 Controller V1R2 instead of purchasing a brand-new CRD300DA12E-XM3 development kit.

Thanks,

David Subert

Hello!

I am very interested in the 60KWDAB.The official website describes the CRD60DD12N-GMB as follows: Through careful design, sufficient power transfer is achieved using only the leakage inductance of the high-frequency transformer, eliminating the need for bulky additional magnetic components. How is this achieved? Are there any limitations to the switching frequency of this design? Is it suitable for operation below 10kHz?

I am working with CGD1700HB2P-BM-REV01 gate driver evaluation board and I am interested in adding regulate positive LDO. I see that there are unpopolated places UT6 and UT7. The user guide PRD-09753: 62mm Gate Driver User Guide | Wolfspeed doesn't state anything for adding positive LDO, just negative LDO.

If you could please elaborate if TPS7A4901DRBT positive LDO is suitable for regulating to +18 V from MGJ2D122005SC output.

Thank you.

We have previously discussed on the 60kW DAB module.

https://forum.wolfspeed.com/discussion/1129/wolfspeed-039-s-60kw-dab-unit-further-discussion#latest

https://forum.wolfspeed.com/discussion/1108/wolfspeed-039-s-60kw-dab-unit#latest

I am intersted to understand few things on the Transformer. You have already mentioned that it is a custom made one and you are working with magnetic partner to have detailed public release.

Will you please give me the detailed information regarding the transformer used for this module. We are trying to build this from our end taking yours as reference. This will be really helpful for the quick progress to our work and can be a good starting point on the magnetics.

regards,

Vishnu

I am currently using the CRD250DA12E-XM3 inverter to supply a test-rig used to examine short circuit faults.

I have a downstream MCB that is intended to provide protection during abnormal short-circuit current conditions. During one of these abnormal events, the 3A-rated MCB trips as expected. However, the inverter switches also trip and enter a latched-off state; although the short-circuit current shouldn't exceed the inverter’s rated current.

What could be causing the inverter to trip in this situation? And if this occurs relatively frequently, could it result in any permanent damage to the inverter?

Many thanks.

Kind regards,

I've been testing the Current Sensing circuits for Phases U, V, and W and noticed that the ADC voltage (I_MEAS) is incorrectly at 0.761V instead of 1.65V (3.3Vref/2) when the input phase current is 0A. This is throwing off the ADC read on my simulation, resulting in incorrect current sense values. When measuring voltage at the Current Reference Rail (U7), I noticed where there should be a 5V input at pins 3 and 4, there is actually a 3.3V input, decreasing Vref to 3V and Vbias to 1.5V. Going even further, the schematic and board design shows that R154 should be pulled up to the +3.3V_I rail, however, a continuity test shows that it is actually being pulled up to the +1.65V_I rail (actually 1.5V with incorrect input voltage to U7).

The same voltage issue is present at U38 and U48. I have module V1.0, but I checked the schematics for the later versions and there is no change to these nets.

Hello,

I am currently using Wolfspeed LTspice power module SPICE models (PRD-07913) for switching transient and layout-related analysis.

I understand from the documentation that the package-level models include detailed parasitic elements, and that these parameters are intended to represent the internal module parasitics.

However, I could not find a description of the data source for these parasitic inductance values in the official models. At a high level, could you please clarify whether the default parasitic parameters in the LTspice power module models are obtained mainly from:

• 3D electromagnetic simulations of the module package (for example, Q3D or similar tools),
• Experimental measurements using dedicated test fixtures on physical modules.

I am not requesting specific parameter values or proprietary modeling details. Understanding whether the internal parasitic parameters are primarily simulation-based or measurement-based would be very helpful for assessing model applicability and for aligning the model with our system-level parasitics.

Thank you very much for your time and support.

Best regards,

jlayf

I am reviewing your 60 kW Dual Active Bridge reference design and would like to request clarification regarding the thermal interface material used between the power modules and the heatsink/cold plate.

Could you please provide the following details:

1. The specific thermal compound (manufacturer and part number)
2. Thermal Conductivity value
3. Applied thickness or bond line thickness

Any recommended alternatives or approved equivalent as we are evaluating a similar design and would like to ensure proper thermal performance and reliability.

Thanks

Anusha

I would like to inquire whether you provide the Wolfspeed 300 kW inverter controller design PCBs in Altium format.

Best regards,

Gayan Dissanayake

is it possible to change isolated DCDC converter and the gate driver evaluation board CGD1700HB2P-BM2 (PST1 and PST2 from schematics), from MGJ2D122005SC (+20V/-5V) to MGJ2D121509SC (+15V/-8.7V) and what would be required to change in addition to DCDC converter?

Best regards.

This is a request for PLECS thermal models of the these 2 Gen-4 6-pack modules: ECB2R1M12YM4 and ECB1R6M12YM4.

Thank you.

Hello,

I am developing an H-bridge using CAB450M12XM3 half-bridge MOSFET units for a high-current application. Along with this, we are planning to use the CRD300DA12E-XM3 inverter as a traction inverter to drive our dynamometer setup.

I am currently working on the PCB design and would like to know whether Wolfspeed provides the symbol and footprint for the CAB450M12XM3 half-bridge module. Additionally, I plan to use the CGD1200HB2P-XM3 gate driver module directly with the MOSFET module.

In the meantime, could you please provide the CRD300DA12E-XM3 inverter Altium design file? Having this would help me understand how the power modules are mounted and would be very useful in designing the full-bridge layout.

Thank you very much for your support.

Best Regards

Sachith

I'm looking for the Altium designer footprint of wolfpack module CBB011M12GM4T.

Best regards.

Background info. The circuit runs as a simple buck regulator with low side device acting as flywheel diode, now running at 30 kHz. the inductor is 100uH and air cored, just a coil of 35mm2 cable. The whole system is driving a flash lamp in pulse mode, i.e. it is intended to flash the lamp for typically 1 to 10 ms and 1 to 100Hz but with the mark space ratio of never more than 10%. Current 100 to 600A, supply 900v across a substantial capacitor bank.

I have attempted to measure the HS Vds again at the same time as the HS gate pulse. this was precarious! with the scope battery powered and floated to dc link voltage with voltage clamp to protect the standard scope probe used for the Vds and a differential probe for the gate. Not ideal as the diff probe leads are long separate wires. however I judged the Vds should be reasonably accurate and the timing from the beginning of the gate pulse to Vds coming below 2.9v is visible.

The yellow trace in volts, clamped at 5.1v, measuring down from HS drain, Blue is the gate voltage rising.at 5v/div. Gate resistors on the CGD1200HB2P-BM3 are all 1R. The Vds seems to come below 2.9v after about 1.6us even though these conditions did not trip. Obviously the noise and some measurement in accuracy muddies the water a bit but the general theme seems that the Vds stays around 3v and then starts to reduce after about 1.5us.

You mentioned in your answers to my previous post, that power loop inductance is a critical factor in system ringing. At these power levels I am not using a PCB, there are cables coming from the 900v capacitor bank, these run as a parallel pair as far as is practical but the capacitors are big and some inductance is unavoidable. I have a lot of capacitance across bus bars to the Power Mosfet pair, 100uF, a 50uf coupled as closely as possible with a further 2uF directly across the MOSFET terminals. I have looked at voltage here and the overshoot at when the HS switches off is very minimal bump. I have a Rowgowski probe but I cannot physically put it around the HS drain connection because the metalwork bus bars are so closely coupled, I imagine the high frequency ringing is coming from the local capacitors rather then the bigger power loop.

Photo of the layout below, the clamp for measuring the Vds is temporarily attached.

I am temped to increase the over current trip blanking time by increasing the value of value of CB9 and CB21 of the driver, currently 56pF, I have ordered some 100pF 0603 components in case. I note that you don't recommend this but question will the device really be damaged by an over current lasting say 2us?

Thank you in anticipation for any guidance, I can supply more detail if needed.

Ian

My name is Ashraf Siddiquee, and I am a Graduate Assistant at The University of Akron. We recently purchased the CRD300DA12E-XM3 Three-Phase Inverter. At the moment, we have only received the hardware and did not receive any of the related software or source code.

I would like to kindly request the following items:

• The Wolfspeed source code referenced in the XM3 Three Phase Inverter Reference Design User Guide
• The XM3 Inverter CAN Interface executable/software (e.g., XM3 Inverter CAN Interface.zip and any related files)
• Any related documentation or download links for firmware, software, and example projects
• Instructions for rebuilding or modifying the source code using Code Composer Studio

Additionally, we are planning to modify the firmware to integrate a TMR sensor using SPI communication. If you have any reference examples, documentation, or recommended approaches for adding SPI-based sensors to the XM3 controller firmware, we would greatly appreciate your guidance.

Thank you very much for your support.

Best regards,
Ashraf Siddiquee

1.Do you have the Pspice model "W-2-0025-4FC"?
　If you have, please provide it.

2.I would like to know the wiring inductance value of the power line of the KIT-CRD-CIL12N-XM3.

The customer wants to create a circuit model of the active gate circuit and proceed with the study, so they want to match the actual device with the simulation model.
Any help would be much appreciated.

Best Regard
T Kishi