ha16174p Renesas Electronics Corporation., ha16174p Datasheet - Page 14

• Manufacturer Part Number: ha16174p
• Description: Power Factor Correction Controller Ic
• Manufacturer: Renesas Electronics Corporation.

HA16174P/FP
RT Pin:
A pin for frequency adjustment of the oscillator.
CT Pin:
A pin for frequency adjustment of the oscillator.
PG Pin:
Open-drain pin for output of the Power Good signal. The internal MOS FET is in the ON state when the output voltage
of the PFC power supply is started up or in case of abnormality. When the output voltage becomes normal, the MOS
FET is switched to the OFF state after the delay time.
IAC Pin:
This pin is for detecting the input AC voltage waveform. For processing within the IC, the AC voltage waveform is
converted to current information.
FB Pin:
This pin is the input to the voltage error amp. This pin is applied to voltage divided PFC output with resistors. The
feedback loop is intended to keep 2.5 V (typ.).
EO Pin:
This pin is the output of the voltage error amp. This pin is connected to the phase-compensation circuit of the voltage
error amp. The voltage on this pin is the input signal to the internal multiplier.
SS Pin:
This pin is connected to GND or VREF via a capacitor. This pin is pulled up to the VREF pin voltage until PFC
operation starts. When the voltage on the PFC-ON pin has reached 1.75 V (typ.) PFC operation is start and this pin
flows 25 A source current. Operation of the CAO pin is affected by that of the SS pin, the pulse width of the OUT pin
is limited, and this prevents overshooting when start up.
VCC Pin:
IC power-supply pin. The IC starts up at 10.5 V (typ.), and stops at 9 V (typ.).
Rev.1.00 Jan 06, 2006 page 14 of 36