HA16158P Datasheet, PDF (21/23 Pages) Renesas Technology Corp – PFC & PWM Control IC

HA16158P/FP
ApplicationCircuit Example
Rec+
Rec−
T1
Q1
From PFC-OUT
+
470µ 24V
(450V)
+
4.7µ
680k
from
auxiliary
To
PFC-FB
680k
VRB1
200k RT
VREF
36k
CAO
OSCILLATOR
3.2V 130kHz
7.7µs ^1.6V _3.85µs
CT
27.5V
PWM-RES
770ns
15.4µs
0.65V
3.4V
65kHz
PFC-DT
RAMP
VCC
H ^16V
UVLO
L _10V
5V Internal Bias
5V VREF
Generator
VREF ^In
H
GOOD _Out
L
UVL
VREF GOOD
3.3n
220p _IAC
750k
PFC
-CS
0.1
(2W)
PFC
1M -EO
47n
4.7n
PFC
-FB
From
VRB1(B+monitor1)
IMO = K {IAC × (VEO − 1V)}
IAC
VEO K IMO
3.3k
PFC-CAMP
−
+
−
+
VREF
GAIN SELECTOR
K = 0.20
K = 0.05
2.5V
+
3.80V
−
3.40V
−
+
R
Q
S
−0.5V −0.25V
+
−
PFC-CLIMIT
R
Q
S
Supervisor
Gate Driver
±1.0A(PEAK)
VREF GOOD _{Gate Driver}
±1.0A(PEAK)
R
Q
S
1V
2R
R
1.4V
B+ OUT
(385V dc)
GND
VREF
100n
PFC ^To
-OUT ^{Q1 gate}
To
main trans
PWM
-OUT _Q2
1
(1W)
VREF
PWM
-COMP ^5.1k
1n
720k
PFC
-ON
2.2µ
20k
−
1.5V ⁺
1.2V
0.1µ
+
−
PFC-OVP
2.80V
2.60V
−
+
B+ LOW
2.40V
1.50V
PFC-OFF
VREF GOOD
GND ^Circuit
Ground
S
Q
R
PFC-PLIMIT _SUPERVISOR
Power Saving for PWM
f/64 Divider
PWM-RES
−
+
1.7V
PWM stop
QS
−
R
PFC stop
+
OVP Latch
Vref
VCC
7.1V
Vref
+
−
4.0V
+
−
RAMP
−
+
SOFT START
CT
25µA
25µA
2.5k
3.5V
PWM
-CS
VREF
33n
VREF
PFC
-SS
PWM
-SS
33n
Unit R: Ω
C: F
Rev.0, Aug. 2002, page 21 of 23