NCP1060 Datasheet, PDF (18/30 Pages) ON Semiconductor – High-Voltage Switcher

VCC (on ) = 9 .0 V
VCC (min ) = 7. 5 V
NCP1060, NCP1063
Drain
Istart 1
VCC
R limit
D1
Shut down
Internal DRV
80 ms
filter
VOVP
C VCC
GND
C AUX
N AUX
Figure 34. A more detailed view of the NCP106X offers better insight on how to properly wire an auxiliary winding
V _OVP
V CC(on)
V CC(min)
VCC
ICOMP
Fault level
TIMER
48 ms typ.
400 ms typ.
DRV
internal
Figure 35. describes the main signal variations when the part operates in auto−recovery OVP:
Soft−start
The NCP106X features a 4 ms soft−start which reduces
the power−on stress but also contributes to lower the output
overshoot. Figure 36 shows a typical operating waveform.
The NCP106X features a novel patented structure which
offers a better soft−start ramp, almost ignoring the start−up
pedestal inherent to traditional current−mode supplies.
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