UCC12050: Insulation Curves for DC

Alen Barisic

Intellectual 1300 points

Part Number: UCC12050
Other Parts Discussed in Thread: UCC12040

Hi Team,

do we have DC Insulation Curves available for the UCC12050?

Regards,

Alen

over 2 years ago

0 Steven Mappus1 over 2 years ago

TI__Mastermind 21085 points

Hi Alen,

TI completes safety isolation testing at independent agencies such as UL, VDE and CQC, as well subjecting the UCC12050 and UCC12040 to our own internal isolation breakdown testing. The isolation limits given in the data sheet are verified by the safety agencies and TI and additional safety margin is added. The breakdown data is not public. Do you have a customer asking for "DC insulation curves" and can you provide an example of what the curves look like?

Regards,

Steve M

0 Alen Barisic over 2 years ago in reply to Steven Mappus1

TI__Intellectual 1300 points

Hi Steve,

my customer is saying the projected lifetime is always based on AC voltage Do you think this value can be just calculated to DC and is valid?

Regards,

Alen

0 Steven Mappus1 over 2 years ago in reply to Alen Barisic

TI__Mastermind 21085 points

Alen,

UCC12050 is a transformer based DC/DC converter module. Projected lifetime based on DC voltage makes no sense from an isolation point of view.

Steve

0 Alen Barisic over 2 years ago in reply to Steven Mappus1

TI__Intellectual 1300 points

Hi Steve,

there is a constant DC voltage of up to 2000V on the DC/DC, the transformer and on the isolators.

If the customer can convert AC to DC with square root of 2, this would be fine for them.

1414VAC = 2000VDC

Any thoughts or concerns?

Regards,

Alen

+1 Steven Mappus1 over 2 years ago in reply to Alen Barisic

TI__Mastermind 21085 points

Alen,

I'm not so concerned the HV on just one side of the isolation boundary but what really matters is the voltage differential across the isolation. Also, no problem on the SC/DC conversion. I assume we are referring to a pure sine wave for the AC voltage?

Regsrads,

Steve M

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UCC12050: Insulation Curves for DC