TPS7B81-Q1: TPS7B8150QDGNRQ1 reflow condition - preheat time

Hiroyuki Masada

Prodigy 90 points

Part Number: TPS7B81-Q1

TI guidline for preheat time is 60sec~120sec from 150degC to 200degC.

BUt cusotmer is asking if TPS7B8150QDGNRQ1 can accept 150sec preheat time from 160degC to 190degC or not.

Could you please answer ?

over 1 year ago

0 Hannah Grace over 1 year ago

TI__Genius 15125 points

Hello,

Thank you for your question.

Please allow me 2-3 business days to respond to your question.

Best Regards,

Hannah

0 Hannah Grace over 1 year ago

TI__Genius 15125 points

According to the TI representation of the J-STD-020, it seems like max preheat time up to 120 seconds. This time is in compliance with the J-STD-020, which is standardized across the industry. To remain IPC/JEDEC compliant, you must stay within the time limits specified.

Please see MSL Ratings and Reflow Profiles (Rev. A) for additional information on reflow profiles.

+1 Allan Webber over 1 year ago

TI__Intellectual 1670 points

Assuming this is a one time exposure, the 150 seconds of a preheat from 160C to 190C instead of a 120 seconds JEDEC maximum should be acceptable. A longer time in the preheat should allow the IC to stablize before the more harsher reflow portion of the SMT profile.

Note that during an IC qualification, we would submit it to 3x reflow cycles so our devices have shown it can survive to 3 exposures to such JEDEC preheat times.

0 Hannah Grace over 1 year ago in reply to Allan Webber

TI__Genius 15125 points

Hello Allan,

Thank you for clarifying JEDEC preheat times based on TI IC qualification. Please feel free to let the customer know that it is okay to proceed with their system. I will be closing this thread now.

Best Regards,

Hannah

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TPS7B81-Q1: TPS7B8150QDGNRQ1 reflow condition - preheat time