LT8648S Part Name Question

Hi team

What is the difference between LT8648SJ and LT8648SH?
The contents of Note 2 are as follows.
I did not explain the difference

LT8648SJ and LT8648SH are guaranteed over the full –40°C to 150°C operating junction temperature range.
High junction temperatures degrade operating lifetimes.
Operating lifetime is derated at junction temperatures greater than 125˚C.
The junction temperature (TJ, in °C) is calculated from the ambient temperature (TA in °C) and power dissipation (PD, in Watts)
according to the formula:
TJ = TA + (PD • JA)
where JA (in °C/W) is the package thermal impedance..

Thanks,

Damon

Parents
  • +1
    •  Analog Employees 
    on Mar 20, 2020 11:25 AM

    ADI Power by Linear’s production lots go through a rigorous outgoing electrical quality tests that include 100% tested after packaging at 25C to all datasheet’s electrical characteristic. Furthermore, each production lot is sample testing at hot and cold junction temperatures to some of the datasheet’s electrical characteristic as noted by red dot, ˜. It is important to note that if at any point a single part fails during sample testing, the lot will be 100% tested. The J-grade and H-grade products have a different sampling plan at these junction temperatures.

    • The H-grade sampling plan is 100% sampled at 150C (or 125C, see datasheet) and 1,000 pieces sampled at -40C.
    • The J-grade sampling plan is 1,000 sampled at 150C (or 125C, see datasheet) and 1,000 pieces sampled at -40C.

    Obviously, the H-grade products provide a lower time zero failure rate and as such are priced higher than J-grade devices. Regardless, both grades are guaranteed to meet performance specification by sample testing rather than typical “assured by design, characterization and correlation with statistical process control” of our competition.

Reply
  • +1
    •  Analog Employees 
    on Mar 20, 2020 11:25 AM

    ADI Power by Linear’s production lots go through a rigorous outgoing electrical quality tests that include 100% tested after packaging at 25C to all datasheet’s electrical characteristic. Furthermore, each production lot is sample testing at hot and cold junction temperatures to some of the datasheet’s electrical characteristic as noted by red dot, ˜. It is important to note that if at any point a single part fails during sample testing, the lot will be 100% tested. The J-grade and H-grade products have a different sampling plan at these junction temperatures.

    • The H-grade sampling plan is 100% sampled at 150C (or 125C, see datasheet) and 1,000 pieces sampled at -40C.
    • The J-grade sampling plan is 1,000 sampled at 150C (or 125C, see datasheet) and 1,000 pieces sampled at -40C.

    Obviously, the H-grade products provide a lower time zero failure rate and as such are priced higher than J-grade devices. Regardless, both grades are guaranteed to meet performance specification by sample testing rather than typical “assured by design, characterization and correlation with statistical process control” of our competition.

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