Datasheet

L78xx - L78xxC Typical performance
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Note: Q
2
is connected as a diode in order to compensate the variation of the Q
1
V
BE
with the
temperature. C allows a slow rise time of the V
O
.
Figure 35. Adjustable output voltage with temperature compensation
V
O
= V
XX
(1+R
2
/R
1
) + V
BE
Figure 36. Light controllers (V
Omin
= V
XX
+ V
BE
)
V
O
rises when the light goes up
V
O
falls when the light goes up