What pair of BJT recommend me for single ended class A emitter follower on 16 ohm load?
Input 10 volt max, 0.5A max, best flat transfer curve possible (and possibly sound).
Many thanks!
Input 10 volt max, 0.5A max, best flat transfer curve possible (and possibly sound).
Many thanks!
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For low voltage application, it’s hard to beat D44H8/D45H8. Use the 8 not the 10, and the H not the VH.
I check it thx 🙏.
Is there even a better alternative considering the low current need? Max 2 A.
10A current capability guarantees linearity through 2A. The Big Deal about the D44/5 is their beta stays high down to Vce=1V. That doesn’t happen with higher voltage types or with generics like TIP41. The price paid is power handling is terrible above 15V or so, but that’s a don’t care.
I've just found this, is inherent?🤔
Seems he doesn't recommend them.
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The problem is the “atrocious” SOA ratings. Good for low voltage, but only for low voltage. They look tempting for a high performance amp running off +/-25V rails but they will go bang - even before getting hot. On a 12-18 volt single rail, fine, even in class A. 20 may be a stretch in class A. They do hold at +/-15 in AB, even driving 4 ohms. But under no circumstances go above that driving “speaker” impedances. In such low voltage applications, you DO want a device that doesn’t fall apart performance-wise at low Vce.
