HA16141P Datasheet, PDF (12/18 Pages) Hitachi Semiconductor – PFC and PWM Controller

HA16141P/FP, HA16142P/FP
3. PFC controller status (cont.)
Notes: 3. PFC-FB (cont.)
The actual input voltage to the PFC-FB pin is the step-up voltage divided with a resistance (see figure below).
W W If R1 is set as 710 k and R2 as 4.7 k , the decision voltage at the step-up pin (+B) is as shown in the figure below.
+B
W R1 710k
PFC-FB
W R2 4.7k
PFC-V_AMP
-
+
To Multiplier
2.5V
PFC-EO
Precondition: VREF GOOD, PFC-ON, Non latched.
418V
Step-up voltage
+B
356V
395V
PFC-FB
2.75V
2.34V
2.60V
PG
Power Good Period
259V
380V
(Typical Output Voltage)
1.70V
2.5V
(PFC Feedback Voltage)
PFC-OUT
Notes: 4. All numeric values in the figure are typical values.
Rev.4, Sep. 2001, page 12 of 18