HA16141P_05 RENESAS [Renesas Technology Corp], HA16141P_05 Datasheet - Page 11

• Manufacturer Part Number: HA16141P_05
• Description: PFC and PWM Controller
• Manufacturer: RENESAS [Renesas Technology Corp]

HA16141P/FP, HA16142P/FP
3. PFC controller status
Rev.5.00 Jun 15, 2005 page 11 of 17
PFC-ON
PFC-FB
PG
PFC-OUT
Notes: 1.
PFC pulses stopped
by PFC-ON,
and PG signal high
Precondition: VREF GOOD, Non latched.
PG signal high due to
low PFC-FB voltage
2.
3.
(Note 3 is continued on the next page)
2.75V
2.34V
1.5V
All numeric values in the figure are typical values.
PFC-ON
The HA16141P/FP can perform on/off control of the PFC function using the PFC-ON pin.
If an AC voltage that has undergone primary rectification and has been divided with an external resistance is input,
PFC stoppage is possible in the event of a low input voltage.
On/off control by means of a logic signal is also possible.
PFC-FB
The input to this pin is the voltage obtained by dividing the stepped-up PFC output voltage.
The pin voltage is fed back to the PFC control system, and is also used for step-up voltage logic decisions.
This is outlined in the figure below.
Feedback voltage
2.50V
Normal
operation
PFC pulses stopped due to
high PFC-FB voltage
(overshoot prevention)
Hysteresis
Hysteresis
2.75V
2.34V
2.60V
Normal
operation
1.2V
2.60V
1.70V
PFC pulses stopped
by PFC-ON,
and PG signal high
PFC-OUT pulse stoppage
(Reduction of step-up voltage overshoot)
PG (Power Good) signal is output
1.5V
Normal
operation
1.70V
PG signal high due to
low PFC-FB voltage
2.34V
1.2V
Normal
operation
PFC pulses stopped
by PFC-ON,
and PG signal high