L78xx - L78xxC
Typical performance
Figure 35. Adjustable output voltage with temperature compensation
VO = VXX (1+R2/R1) + VBE
Note:
Q is connected as a diode in order to compensate the variation of the Q V with the
2 1 BE
temperature. C allows a slow rise time of the V .
O
Figure 36. Light controllers (V
= V + V
)
BE
Omin
XX
VO rises when the light goes up
VO falls when the light goes up
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