ha16142fp Renesas Electronics Corporation., ha16142fp Datasheet - Page 15

• Manufacturer Part Number: ha16142fp
• Description: Pfc And Pwm Controller
• Manufacturer: Renesas Electronics Corporation.

4. PFC-ON pin
The following functions are effected by inputting an AC voltage that has undergone primary rectification
and has been divided with an external resistance to the PFC-ON pin (see figure below).
a) Turning PFC operation off when AC voltage is low
b) Switching multiplier gain with AC 100 V system and 200 V system input
AC voltage
Vac
PFC-ON
PFC Status
(internal status)
Multiplier gain
(internal status)
Note: All numeric values in the figure are typical values.
Precondition: VREF GOOD, Non latched.
2.2µF
Em
Rec+
157Vac
62Vac
R1
R2
3.83V
0Vac
1.5V
OFF
0.25
0.05
ON
0V
720kΩ
20kΩ
PFC-ON
PFC-ON(dc) = 2 ⋅ Em / π ⋅ R2 / (R1 + R2)
3.83V
3.63V
1.5V
1.2V
= 2 ⋅ (√ ) ⋅ Vac / π ⋅ R2 / (R1 + R2)
PFC-ON Period
−
+
−
+
149Vac
3.63V
HA16141P/FP, HA16142P/FP
Switching Multiplier Gain
PFC-ON/OFF Control
Rev.4, Sep. 2001, page 13 of 13
49Vac
1.2V