HA16178P Datasheet, PDF (23/25 Pages) Renesas Technology Corp – Power Factor Correction Controller IC

HA16178P/FP
System Diagram
Rec+
T1
Q1
B+
680 k
To FB
680 k
B+ OUT
(385 V dc)
Rec–
From OUT
470 µ
(450 V)
24 V
4.7 µ
from
auxiliary
VRB1
GND
VCC
16
27 k ^RT
9
CT
10
1000 p
VREF
3.3 n 30
k^CAO
7
27.5 V
10.5 V
H
UVLO
L _{9.0 V}
770 ns
15.4 µs
3.6 V
PFC-DT
RAMP
0.65 V
65 kHz
Oscillator
470 p
3M
IAC
12
1.75 M
1000 p
100
CS
8
0.016
(5 W)
0.01 µ
EO
820 k
14
33 n
FB
13
From
VRB1 (B+ monitor1)
IMO = K × {IAC × (VEO – 1 V)}
IAC
IMO
CAMP
K
55 k
3.3 k
Gain
Selector
Gain
Select
K = 0.20
K = 0.05
2.5 V
VAMP
VREF
SS
VREF
CLIMIT
–0.30 V
720 k
PFC-ON
5
0.50 V
2.2 µ ^{20 k}
0.1 µ
1.75 V
1.60 V
5 V VREF
Generator
5 V Internal Bias
VREF
6
0.1 µ
VREF In
GOOD _Out
UVL
RQ
SQ
RQ
SQ
VREF GOOD
Gate Driver
±1.0 A (PEAK)
To
Q1 gate
1
OUT
2.688 V
2.638 V
B+OVP
FB LOW
PFC-OFF
VREF
VREF
25 µA
15
4.7 µ
SS
PGND
2
SGND
3
REJ03D0903-0100 Rev.1.00 Jun 12, 2007
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