about power dissipation of per switch

for this CAB650M17HM3 mosfet module -
1) power loss is given per switch or module ……..?
2) is this module qualified for automotive grade …..?
3) what is the diode and switch current rating at 100deg case temp……?
4) is thermal pad of module isolated with switch terminal …..?
5) in the datasheet did't mention for thermal interface material like aluminium nitrite or aluminium oxide,so what is the material ….?
6) what is the material of thermal pad …. is that copper plate…?
Comments
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Thank you for your post, it has been approved and we will respond as soon as possible.
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please provide the information for material availability. is that active and preferred for new design ……..?
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Hi Suraj,
Here are some quick answers to your questions:
1) Unless specified otherwise, all specifications will be for a single switch position of the module
2) The HM modules are not automotive qualified
3) Overall this question will depend on your system (TIM, switching frequency, bus voltage, Rg). Figures 20 - 22 in the datasheet can be helpful here. In general you should be able to use the plots in the datasheet (conduction losses, Rth, etc.) to answer this question. If you have any specific questions or additional details I can help you with this.
4) The baseplate is electrically isolated from the substrate/terminals and can be directly attached to a heatsink. The isolation voltage is well above the voltage rating of the device.
5) No TIM is specified in the datasheet. The Rth and Zth parameters are from the junction to the case/baseplate. The thermal resistance of the TIM will depend on your designed system. See PRD-07933 for more details. We recommend Honeywell PTM6000HV paste.
6) The baseplate material is aluminum silicon carbide (AlSiC)
For your final question - the CAB650M17HM3 is an active and recommended product.
Please let me know if you have any further questions or need any assistance with your design.
Thanks,
Brian
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Thanks for your response
1) Hm module CAB650M17HM3 is automotive grade….?
2) For my last 3rd question -
oparating condition
TIM - Aluminum
Current throw the switch - 220Amp rms
Switching frequency - 50kHz
DC bus voltage - 860 Volt
Rg value according to datasheet - 1.5 ohm
3) for example in operating condition
RMS current is 220 Amp and operating voltage is 900 volt across the switch
So RMS is 220Amp means maximum will around 290 Amp
3.1- Should we consider Maximum rating (290 amp) with DC Continuous Drain Current(Id) for mosfet from data sheet or RMS current 220 Amp for safe operating condition. …?
3.2 - is 1200volt device right choice to use for 860 volt at 50kHz switching frequency……..?0 -
Hi Suraj,
- The module is not automotive qualified as previously replied. This means that the module is not subject to regular automotive qualification standards like AQG324.
- CAB650M17HM3 PLECS model is loaded in SpeedFit. You can define your system parameters there and run simulations on the web to see if the product meets your specifications. If there is any requirement for detailed simulations support, please contact us through your local sales representative.
3.1. DC continuous drain current is the max DC current that the module can support without violating the case temperature. You should always use maximum ratings to define SOA. However, depending on your system design strategy, it may not be a bad idea to design in some extra margins.
3.2. With 860V bus, you have an overhead margin of 340V for a 1200V device. If 340V is good enough or not is dependent on the bussing stray inductance in your system. This requires physical evaluation in a double pulse test set up. You can use
LTSPICE models from Wolfspeed to run LTSPICE simulations of double pulse testing to gain a preliminary understanding of your system. .Thanks and Regards,
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Please can we have a meeting for technical and commercial things…..?
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Hi Suraj,
We would request you to contact us through a sales representative or channel partner. In case you don't have a point of contact, I can forward your details to the regional sales team.
Regards,
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yes please share . that would be helpful for me
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