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Hello everyone,
I am looking for a gate-driver IC, which need to possess high insulation characteristics. I am trying to build a 3-phase bidirectional inverter (2 Level AFE) with a DC-Link voltage of 1200V. Where a RMS-voltage of 1200V appears across power modules (in my case are SiC-MOSFET power modules). Therefore there should be an Isolation between high- and low voltage sides accordingly. I've checked the Infineon's gate driver ICs but the maximum isolation working voltage (in RMS) is not mentioned in most of the driver data sheets. "Reinforced insulation data according to VDE 0884-11" and "according to time dependent dielectric breakdown voltage TDDB test". There are some IC data sheets, in which this voltage of Viowm = 1000V is given, but it is not enough for my application voltage of 1200V. I've found a IC from texas instruments, and all isolation datas are given in data sheet. I've attached a screenshot of isolation part. But the problem is this IC and many of Infineon ICs are not available.
best regards
ergin
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Hello @ergin
Infineon has a maximum rating of 2300V class. Those are filtered on the product page .please click here.
I just want to know your product application and voltage class.
looks the link which was provided will help with your application.
Note: The relation for Viowm and Viorm is given below
Viowm=Viorm/1.414
Note: Unfortunately, Infineon doesn't have Viowm>1k
Thanks
Guru
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Hello @ergin
Thanks for posting your question in the Infineon community.
Please let me know what is your Viowm?
Thanks
Guru
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Hello Guru,
Thanks for responding my question,
Viowm is maximum isolation working voltage defined in RMS, which is determined by AC Voltage (sine wave) time dependent dielectric breakdown (TDDB) test. This value is defined in insulation specifications according to VDE 0884-11. And VDE 0884-11 is active certification standard for evaluating the intrinsic insulation characteristics and high-voltage capabilities of magnetic and capacitive galvanic isolation products.
best regards
ergin
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Hello,
Viowm is in another words, the consistent voltage that the isolation barrier of product needs to withstand for the lifetime of the system.
best regards
ergin
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Here is the insulation characteristics part of the datasheet of IC "1ED3491MC12M".
Can you please show me here the value Viowm? it is not defined. To define its value, it should first be tested. I already checked other similar IC with Viowm defined in its own datasheet, which have a maximium working voltage of 1000 Vrms. But I need an IC at least with Viowm of 1200 Vrms.
best regards
ergin
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here is a Half-bridge drive IC "2EDF7275F" with voltage class of 650 V. And Viowm (max. Isolation working voltage for reinforced isolator between high- and low-voltage side) is given to be 1000Vrms.
best regards
ergin
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Hello @Guru_Prasad
So can you help me with it? or i should seek another solution for it.
best regards
ergin
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because it is actually material characteristic, which used as Isolation barier. There may be an additional info sheet which describes insulation characteristics for some Infineon IC family.
best regards
ergin
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Hello @ergin
Infineon has a maximum rating of 2300V class. Those are filtered on the product page .please click here.
I just want to know your product application and voltage class.
looks the link which was provided will help with your application.
Note: The relation for Viowm and Viorm is given below
Viowm=Viorm/1.414
Note: Unfortunately, Infineon doesn't have Viowm>1k
Thanks
Guru