FA5331P(M)/FA5332P(M)
FA5331P(M)/FA5332P(M)
s
Description
FA5331P(M) and FA5332P(M) are control ICs for a power
factor correction system. These ICs use the average current
control system to ensure stable operation. With this system, a
power factor of 99% or better can be achieved.
FA5331P(M) is a 1st generation IC and FA5332P(M) is 2nd
generation IC which light-load characteristics are improved.
Bipolar IC
For Power Factor Correction
s
Dimensions, mm
SOP-16
16
9
5.5
7.8
±0.3
• Drive circuit for connecting a power MOS-FET(Io =
±1.5A)
• Pulse-by-pulse overcurrent and overvoltage limiting function
• Output ON/OFF control function by external signals
• External synchronizing signal terminal for synchronous
operation with other circuits
• Undervoltage malfunction prevention function
• Low standby current (90µA typical) for simple start-up circuit
• 16-pin package (DIP/SOP)
•
±2%
accuracy reference voltage for setting DC output and
overvoltage protection [FA5332P(M) only]
• When there is a possibility of light-load operation,
FA5332P(M) is suitable.
10.06
+0.1
1
8
0.20
–0.05
s
Features
0~10˚
0.7
0.40
±0.1
1.27
±0.2
DIP-16
FA5331P
16
9
s
Block diagram
1
0.81
19.4
1.5
8
3.1min 4.3max
0.2min
3.4
6.5
0.3
–0
7.6
+0.1 5
.0
2.54
±0.25
0.5
±0.1
0~15
˚
0~1
5˚
FA5332P
16
9
1
0.71
19.2
1.3
8
2.54min 5.06max
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin
symbol
IFB
IIN–
VDET
OVP
VFB
VIN–
GND
OUT
VC
VCC
CS
ON/OFF
REF
SYNC
CT
IDET
0.51min
Current error amplifier output
Inverting input to current error amplifier
Multiplier input
Overvoltage protection input
Voltage error amplifier output
Inverting input to voltage error amplifier
Ground
Output
Power supply to output circuit
Power supply
Soft-start
Output ON/OFF control input
Reference voltage
Oscillator synchronization input
Oscillator timing capacitor and resistor
Non-inverting input to current error amplifier
2.54
±0.25
3.6
Description
6.3
–0.0
0.25
7.62
0~1
5˚
0.48
±0.1
0~15
˚
1
2.0
+0.1 5
FA5331P(M)/FA5332P(M)
s
Absolute maximum ratings
Item
Supply voltage
Output current
Input voltage
Symbol
Rating
FA5331P(M)
FA5332P(M)
30
±1.5
–0.3 to +5.3
V
A
V
Unit
V
CC
,
V
C
30
I
O
±1.5
V
SYNC
,
V
ON/OFF
,
V
VIN–
–0.3 to +5.3
V
VDET
,
V
OVP
V
IDET
P
d
T
opr
T
stg
–10.0 to +5.3
850 (DIP-16) *
1
650 (SOP-16)
–30 to +85
–40 to +150
*
2
–10.0 to +5.3
850 (DIP-16) *
1
650 (SOP-16)
–30 to +85
–40 to +150
*
2
V
mW
°C
°C
Notes:
*
1
Derating factor Ta > 25°C: 6.8mW/°C (on PC board)
*
2
Derating factor Ta > 25°C: 5.2mW/°C (on PC board)
Total power dissipation
(Ta=25°C)
Operating temperature
Storage temperature
s
Recommended operating conditions
Item
Supply voltage
IDET terminal input voltage
VDET terminal input voltage
VDET terminal peak input voltage
Oscillator timing capacitance
Symbol
FA5331P(M)
Min.
Max.
28
0
2.0
2.0
–
–
220
100
10
–1.0
0
0.65
–
–
10
0
FA5332P(M)
Min.
10
–1.0
0
0.65
330
10
15
0
Max.
28
0
2.4
2.4
1000
75
150
27
V
V
V
V
pF
kΩ
kHz
Ω
Unit
V
CC
,
V
C
V
IDET
V
VDET
V
PVDET
C
T
Oscillator timing resistance
R
T
Oscillation frequency
f
OSC
Noise filter resistance connected to IDET terminal
R
n
s
Electrical characteristics
(Ta=25°C, C
T
=470pF, R
T
=22kΩ, V
CC
=V
C
=18V)
Oscillator section
Item
Oscillation frequency
Frequency variation 1 (due to supply voltage change)
Frequency variation 1 (due to temperature change)
Output peak voltage
Synchronizing input peak voltage
Symbol
Test condition
FA5331P(M)
Min.
Typ.
75
1
5
3.55
SYNC terminal voltage 1.5
1.5
68
82
FA5332P(M)
Max. Min.
68
Typ.
75
1
5
3.55
Max.
82
3
8
kHz
%
%
V
V
Unit
f
OSC
f
dV
f
dT
V
OSC
V
SYNC
C
T
=470pF
R
T
=22kΩ
V
CC
=10 to 30V
Ta=–30 to +85°C
Voltage error amplifier section
Item
Symbol
Test condition
FA5331P(M)
Min.
Reference voltage
Input bias current
Open-loop voltage gain
Output voltage
Typ.
1.54
FA5332P(M)
Max. Min.
1.60
Typ.
Max.
nA
dB
3.8
50
–900
200
V
mV
µA
Unit
V
r
I
BE
A
VE
V
OE+
V
OE–
I
OE+
1.48
80
No load
3.5
1.519 1.550 1.581 V
–500 –50
80
3.5
–500 –50
3.8
50
200
Output source current
V
OE
=0V
–900
2
FA5331P(M)/FA5332P(M)
Current error amplifier section
Item
Input threshold voltage
Input bias current
Open-loop voltage gain
Output voltage
Output source curent
Symbol
Test condition
FA5331P(M)
Min.
Typ.
FA5332P(M)
Max. Min.
0
Typ.
30
Max.
60
mV
Unit
V
TH IDET
I
BC
A
VC
V
OC+
V
OC–
I
OC+
V
DET
=0V
–
–
–
V
FB
=
V
r
,
R
n
=30Ω
I
DET
=0V
–350 –230
80
No load
3.5
3.8
50
200
–900
–350 –250 –150
µA
80
3.5
3.8
50
–900
200
dB
V
mV
µA
V
IFB
=0V
Reference voltage section
Item
Output voltage
Voltage variation 1 (by supply voltage variation)
Voltage variation 2 (by load change)
Symbol
Test condition
FA5331P(M)
Min.
Typ.
5.0
4.8
5.2
25
2
2
FA5332P(M)
Max. Min.
4.8
Typ.
5.0
Max.
5.2
25
5
V
mV
mV
Unit
V
REF
V
RDV
V
RDT
V
CC
=10 to 30V
I
OR
=0.1 to 2mA
Multiplier section
Item
Symbol
Test condition
FA5331P(M)
Min.
VDET terminal input voltage
VFB terminal input voltage
Output current
Output voltage coefficient
Typ.
FA5332P(M)
Max. Min.
2.0
3.5
–65
–1.0
0
1.5
–65
–1.0
Typ.
Max.
2.4
3.5
V
V
µA
–
Unit
V
MVDET
V
MVFB
I
M
K
0
1.5
V
IIN–
=0V
Pulse width modulation circuit section
Item
Maximum duty cycle
Symbol
Test condition
FA5331P(M)
Min.
Typ.
92
89
95
FA5332P(M)
Max. Min.
89
Typ.
92
Max.
95
%
Unit
D
MAX
Output circuit section
Item
Output voltage
Symbol
Test condition
FA5331P(M)
Min.
Typ.
1.3
15.5
16.5
1.8
15.5
FA5332P(M)
Max. Min.
Typ.
1.3
16.5
Max.
1.8
V
V
Unit
V
OL
V
OH
t
r
t
r
I
O
=100mA
I
O
=–100mA
V
CC
=18V
No load
No load
Rise time
Fall time
300
200
300
200
ns
ns
Soft-start circuit section
Item
Input threshold voltage
Symbol
Test condition
Duty cycle=0%
Duty cycle=D
MAX
CS terminal=0V
FA5331P(M)
Min.
Typ.
0.1
3.55
–10
FA5332P(M)
Max. Min.
Typ.
0.1
3.55
–10
Max.
V
V
µA
Unit
V
THCSO
V
THCSM
I
CHG
Charge current
3
FA5331P(M)/FA5332P(M)
Overvoltage protection circuit section
Item
Input threshold voltage
Input threshold voltage/reference voltage(V
THOVP
/ Vr)
Delay time
Symbol
Test condition
OVP terminal
voltage
FA5331P(M)
Min.
Typ.
1.64
–
200
1.56
–
1.72
–
FA5332P(M)
Max. Min.
Typ.
Max.
Unit
V
THOVP
1.617 1.650 1.683 V
1.044 1.065 1.086 –
200
ns
T
PDOVP
Overcurrent limiting circuit section
Item
Symbol
Test condition
FA5331P(M)
Min.
Input threshold voltage
Delay time
Typ.
FA5332P(M)
Max. Min.
Typ.
Max.
Unit
V
THOCP
T
PDOCP
IDET terminal
voltage
–1.25 –1.15 –1.05 –1.20 –1.10 –1.00 V
200
200
ns
Output ON/OFF circuit section
Item
Symbol
Test condition
FA5331P(M)
Min.
Threshold voltage
Typ.
–
–
60
–
FA5332P(M)
Max. Min.
–
3.5
–
120
–
3.7
2.8
1.5
–
10
Typ.
Max.
4.3
3.4
2.8
–
40
V
V
V
µA
µA
Unit
V
THONOFF
Ta=–30°C
Ta=+25°C
Ta=+85°C
–
2.0
–
Input current at ON
I
THON
ON/OFF terminal
voltage=3.5V
ON/OFF terminal
voltage=
V
THONOFF
Undervoltage lockout circuit section
Item
Symbol
Test condition
FA5331P(M)
Min.
OFF to ON threshold voltage
ON to OFF threshold voltage
Voltage hysteresis
Typ.
15.3
8.3
7.0
FA5332P(M)
Max. Min.
16.3
9.0
14.6
7.6
Typ.
15.3
8.3
7.0
Max.
16.0
9.0
V
V
V
Unit
V
THUON
I
THUOFF
V
UHYS
14.3
7.6
Overall device
Item
Standby current
Operating-state supply current
OFF-state supply current
Symbol
Test condition
FA5331P(M)
Min.
Typ.
90
10
Pin 12=0V
1.1
140
15
1.8
FA5332P(M)
Max. Min.
Typ.
90
10
1.1
Max.
140
15
1.8
µA
mA
mA
Unit
I
CCST
I
CCOP
I
CCOFF
V
CC
=14V
4
FA5331P(M)/FA5332P(M)
s
Description of each circuit
1. Oscillator section
This section outputs sawtooth waves oscillating between 0.15
and 3.55V using the capacitor charge and discharge
characteristics. Figure 1 shows how to connect the required
external components to this circuit. The oscillation frequency
is determined by the C
T
and R
T
values. The relationship
between the C
T
and R
T
values is shown in characteristic
curves. Pin 14 (SYNC) is a synchronizing input terminal
whose threshold voltage is about 1V. As Fig. 1 shows, input
rectangular synchronizing signal waves to pin 14 through an
RC circuit. Set the free-running frequency about 10% lower
than the synchronizing signal frequency. Connect a clamp
diode (D1) to prevent an unwanted current inside the IC.
2. Voltage error amplifier and overvoltage limiting circuit
The voltage error amplifier forms a voltage feedback loop to
keep the output voltage stable. The positive input terminal of
this amplifier is connected to the reference voltage (Vr). Fig. 2
shows how to connect the required external components to
this circuit.
The output voltage (Vo) is as follows:
............................................................................... (1)
Vo = R1 + R2 • Vr
R1
FA5331: Vr=1.54V(typ.)
FA5332: Vr=1.55V(typ.)
13 REF
RT
15
CT
CT
OSC
R
14
Csy
D1
SYNC
Fig. 1 Oscillator
Vo
C1
R2
5
R4
6
R3
R1
ER.AMP
_
A1
+
Vr
MUL
Connect a resistor and a capacitor in parallel across error
amplifier output pin 5 and error amplifier negative input pin
6 to set the voltage gain (Av).
The Av value is as follows:
Av =
R4
R3 ( 1 + jω C1 • R4 )
............................... (2)
4
Vp
OVP
C1
F.F
Error amplifier cutoff frequency (fc) is as follows:
fc =
1
2π C1 • R4
................................................. (3)
Fig. 2 Voltage error amplifier and overvoltage limiting circuit
If 100 or 120Hz ripples appear at the error amplifier output, the
active filter does not operate stably. To ensure stable
operation, set the fc value to about 1Hz.
An overvoltage detection comparator (C1) is built in to limit the
voltage if the output voltage exceeds the design value. The
reference input voltage (Vp) is as follows:
Vp =
α
• Vr ............................................................. (4)
α
=1.065
The connections shown in Fig. 2 limit the output voltage to
α
times the design value.
5
DSP and ARM Processors
京公网安备 11010802033920号
EEWORLD
