HA16178P Renesas Technology, HA16178P Datasheet - Page 15
HA16178P
Manufacturer Part Number
HA16178P
Description
Power Factor Correction Controller IC
Manufacturer
Renesas Technology
Datasheet
1.HA16178P.pdf
(25 pages)
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HA16178P/FP
3. Soft Start
This function prevents applying excessive stress on external components and overshooting of the PFC output voltage (B
+ voltage) when start up. The pulse width is gradually widening from 0% duty cycle. During soft-start operation, the
SS and CAO signals lower with link. The duty cycle is controlled by the CAO signal.
The soft-start time can be set by an external capacity.
PFC output voltage
REJ03D0903-0100 Rev.1.00 Jun 12, 2007
Page 15 of 24
PFC-ON
CAO
OUT
SS
CT
1.75 V
Figure 3 Soft-Start Operation Waveform
CAO
SS
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