Datasheet

LM1949
www.ti.com SNLS349C –FEB 1995–REVISED MARCH 2013
As shown, the power dissipation by Q
1
in this manner is substantially reduced. Measurements made with a
thermocouple on the bench indicated better than a fourfold reduction in power in Q
1
. However, the power
dissipation of the zener (which is independent of the zener voltage chosen) is increased over the circuit of
Figure 1.
Figure 22. Switching Application Circuit
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