HA16178P Renesas Technology, HA16178P Datasheet - Page 23

• Manufacturer Part Number: HA16178P
• Description: Power Factor Correction Controller IC
• Manufacturer: Renesas Technology

HA16178P/FP
System Diagram
REJ03D0903-0100 Rev.1.00 Jun 12, 2007
Page 23 of 24
720 k
2.2 µ
From
VRB1 (B+ monitor1)
0.016
(5 W)
Rec+
Rec–
3.3 n
1000 p
470 p
VREF
100
820 k
33 n
3 M
PFC-ON
1.75 M
20 k
30 k
27 k
1000 p
CAO
0.01 µ
IAC
CS
EO
RT
CT
FB
10
12
14
13
9
7
8
5
IAC
From OUT
IMO = K × {IAC × (VEO – 1 V)}
0.1 µ
2.5 V
T1
Q1
K
15.4 µs
IMO
V
Oscillator
0.65 V
770 ns
AMP
Selector
0.50 V
470 µ
(450 V)
Gain
3.3 k
65 kHz
3.6 V
1.75 V
1.60 V
C
24 V
AMP
K = 0.20
K = 0.05
Select
Gain
VCC
B+
27.5 V
RAMP
55 k
4.7 µ
PFC-DT
16
VREF
VREF
– 0.30 V
H
L
680 k
C
SS
9.0 V
LIMIT
10.5 V
UVLO
from
auxiliary
2.688 V
2.638 V
R
S
R
S
Q
Q
Q
Q
To FB
B+OVP
UVL
FB LOW
Generator
5 V VREF
680 k
PFC-OFF
VRB1
VREF
GOOD
VREF GOOD
Gate Driver
± 1.0 A (PEAK)
Out
In
5 V Internal Bias
25 µA
B+ OUT
VREF
(385 V dc)
15
6
1
2
3
GND
VREF
OUT
SS
PGND
SGND
To
Q1 gate
4.7 µ
VREF
0.1 µ