Beta / Hfe of SSM2212 Packages

Question

The data sheet shows wildly different Current Gain (beta / Hfe) for the two packages (SOIC and QFN), Is this accurate?

SOIC shows a typical 1mA Hfe = 600

QFN shows a typical 1mA Hfe = 1,800

Are there different dies in each package? What causes this extreme difference in what otherwise should be an identical part, irrespective of package.

DaveThib · Accepted Answer

Hello Driz, 
 Sorry for the long delay. It took a while to track this down. 
 As it turns out the part was first released in the SOIC package and then five years later it was released in the QFN package. So the two parts are not built from the same die at all. They are different dies and there was most likely a silicon process update that had been made during the five years of time. So the die is different and there must be some process changes that in turn caused the hFe to be drastically different. 
 I hope this helps. 
 Thanks for asking! 
 Dave T)

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Beta / Hfe of SSM2212 Packages

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