HA16141P_05 RENESAS [Renesas Technology Corp], HA16141P_05 Datasheet - Page 13

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

HA16141P/FP, HA16142P/FP
4. PFC-ON pin
Rev.5.00 Jun 15, 2005 page 13 of 17
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 ⋅ (√2) ⋅ Vac / π ⋅ R2 / (R1 + R2)
PFC-ON Period
−
+
−
+
149Vac
3.63V
Switching Multiplier Gain
PFC-ON/OFF Control
49Vac
1.2V