FA5331P(M)/FA5332P(M)
FA5331P(M)/FA5332P(M)
Bipolar IC
For Power Factor Correction
■ Description
■ Dimensions, mm
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.
Á SOP-16
0.40±0.1
2.0
+0.1
8
0~10˚
10.06
1.27±0.2
0.7
Á DIP-16
FA5331P
16
6.5
9
1
8
19.4
1.5
0.2min
3.4
0.81
3.1min 4.3max
■ Block diagram
1
0.20 –0.05
5.5
7.8±0.3
■ Features
• 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.
9
16
7.6
0.5±0.1
2.54±0.25
+0.1 5
.0
0.3 –0
5˚
0~15
0~1
˚
FA5332P
9
6.3
16
Description
1
IFB
IIN–
VDET
OVP
VFB
VIN–
GND
OUT
VC
VCC
CS
ON/OFF
REF
SYNC
CT
IDET
Current error amplifier output
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
0.51min
Pin
symbol
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
1.3
3.6
0.71
Pin
No.
8
19.2
2.54±0.25
0.48±0.1
2.54min 5.06max
1
0~15
˚
+0.1 5
–0.0
0.25
7.62
5˚
0~1
FA5331P(M)/FA5332P(M)
■ Absolute maximum ratings
Item
Symbol
Rating
Unit
FA5331P(M)
Supply voltage
Output current
Input voltage
Total power dissipation
VCC, VC
30
IO
±1.5
VSYNC, VON/OFF, VVIN– –0.3 to +5.3
VVDET, VOVP
VIDET
Pd
–10.0 to +5.3
850 (DIP-16)
(Ta=25°C)
Operating temperature
Storage temperature
FA5332P(M)
Topr
Tstg
30
V
±1.5
A
–0.3 to +5.3
V
–10.0 to +5.3
*1
850 (DIP-16)
V
*1
mW
650 (SOP-16) * 2
650 (SOP-16) * 2
–30 to +85
–30 to +85
°C
–40 to +150
–40 to +150
°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)
■ Recommended operating conditions
Item
FA5331P(M)
FA5332P(M)
Min.
Max.
Min.
Max.
10
28
10
28
V
–1.0
0
–1.0
0
V
0
2.0
0
2.4
V
0.65
2.0
0.65
2.4
V
Oscillator timing capacitance
–
–
330
1000
pF
Oscillator timing resistance
–
–
10
75
kΩ
Supply voltage
IDET terminal input voltage
VDET terminal input voltage
VDET terminal peak input voltage
Symbol
VCC, VC
VIDET
VVDET
VPVDET
CT
RT
Oscillation frequency
fOSC
Noise filter resistance connected to IDET terminal Rn
Unit
10
220
15
150
kHz
0
100
0
27
Ω
■ Electrical characteristics (Ta=25°C, CT=470pF, RT=22kΩ, VCC=VC=18V)
Oscillator section
Item
Symbol
Oscillation frequency
fOSC
Frequency variation 1 (due to supply voltage change)
fdV
Frequency variation 1 (due to temperature change)
fdT
VOSC
VSYNC
Output peak voltage
Synchronizing input peak voltage
Test condition
CT=470pF
RT=22kΩ
VCC=10 to 30V
FA5331P(M)
FA5332P(M)
Unit
Min.
Typ.
Max. Min.
Typ.
Max.
68
75
82
75
82
Ta=–30 to +85°C
68
kHz
1
1
3
%
5
5
8
%
3.55
3.55
SYNC terminal voltage 1.5
V
1.5
V
FA5332P(M)
Unit
Voltage error amplifier section
Item
Symbol
Reference voltage
Output voltage
Vr
IBE
AVE
VOE+
No load
Output source current
VOE–
IOE+
VOE=0V
Input bias current
Open-loop voltage gain
Test condition
FA5331P(M)
Min.
Typ.
Max. Min.
1.48
1.54
1.60
–500 –50
Max.
–500 –50
80
3.5
Typ.
1.519 1.550 1.581 V
nA
80
3.8
50
–900
3.5
200
dB
3.8
50
–900
V
200
mV
µA
2
FA5331P(M)/FA5332P(M)
Current error amplifier section
Item
Symbol
Test condition
FA5331P(M)
Min.
Input threshold voltage
VTH IDET
Input bias current
IBC
Open-loop voltage gain
AVC
VOC+
VOC–
IOC+
Output voltage
Output source curent
Typ.
FA5332P(M)
Max. Min.
VDET=0V
–
–
–
VFB= Vr, Rn=30Ω
IDET=0V
–350 –230
80
No load
3.5
Max.
30
60
3.8
mV
–350 –250 –150 µA
80
50
VIFB=0V
0
Unit
Typ.
3.5
200
dB
3.8
50
–900
V
200
mV
µA
–900
Reference voltage section
Item
Symbol
Test condition
Output voltage
Voltage variation 1 (by supply voltage variation)
VREF
VRDV
VCC=10 to 30V
Voltage variation 2 (by load change)
VRDT
IOR=0.1 to 2mA
Symbol
Test condition
FA5331P(M)
FA5332P(M)
Unit
Min.
Typ.
Max. Min.
Typ.
Max.
4.8
5.0
5.2
5.0
5.2
V
25
mV
5
mV
4.8
25
2
2
Multiplier section
Item
FA5331P(M)
Min.
VDET terminal input voltage
VFB terminal input voltage
Output current
Output voltage coefficient
VMVDET
VMVFB
IM
K
Typ.
FA5332P(M)
Max. Min.
Typ.
Unit
Max.
0
2.0
0
2.4
V
1.5
3.5
1.5
3.5
V
VIIN–=0V
–65
–65
µA
–1.0
–1.0
–
Pulse width modulation circuit section
Item
Symbol
Maximum duty cycle
DMAX
Test condition
FA5331P(M)
FA5332P(M)
Unit
Min.
Typ.
Max. Min.
Typ.
Max.
89
92
95
92
95
89
%
Output circuit section
Item
Symbol
Test condition
FA5331P(M)
Min.
Output voltage
Rise time
Fall time
VOL
VOH
IO=100mA
IO=–100mA
VCC=18V
tr
tr
No load
No load
Symbol
Test condition
15.5
FA5332P(M)
Unit
Typ.
Max. Min.
Typ.
Max.
1.3
1.8
1.3
1.8
16.5
15.5
V
16.5
V
300
300
ns
200
200
ns
Soft-start circuit section
Item
FA5331P(M)
Min.
Typ.
FA5332P(M)
Max. Min.
Typ.
Unit
Max.
Input threshold voltage
VTHCSO
Duty cycle=0%
0.1
0.1
V
Duty cycle=DMAX
3.55
3.55
V
Charge current
VTHCSM
ICHG
CS terminal=0V
–10
–10
µA
3
FA5331P(M)/FA5332P(M)
Overvoltage protection circuit section
Item
Symbol
Input threshold voltage
VTHOVP
Input threshold voltage/reference voltage(VTHOVP/ Vr)
움
TPDOVP
Delay time
Test condition
OVP terminal
voltage
FA5331P(M)
FA5332P(M)
Typ.
Max. Min.
1.56
1.64
1.72
1.617 1.650 1.683 V
–
–
–
1.044 1.065 1.086 –
200
Typ.
Unit
Min.
Max.
200
ns
Overcurrent limiting circuit section
Item
Symbol
Test condition
FA5331P(M)
Min.
Input threshold voltage
VTHOCP
Delay time
TPDOCP
IDET terminal
voltage
Typ.
FA5332P(M)
Max. Min.
Typ.
Unit
Max.
–1.25 –1.15 –1.05 –1.20 –1.10 –1.00 V
200
200
ns
Output ON/OFF circuit section
Item
Threshold voltage
Input current at ON
Symbol
Test condition
VTHONOFF Ta=–30°C
ITHON
FA5331P(M)
FA5332P(M)
Typ.
Max. Min.
–
–
–
3.7
4.3
V
Ta=+25°C
2.0
Ta=+85°C
–
Typ.
Unit
Min.
Max.
3.5
2.8
3.4
V
–
–
1.5
2.8
V
ON/OFF terminal
voltage=3.5V
60
120
–
–
µA
ON/OFF terminal
voltage=VTHONOFF
–
–
10
40
µA
Undervoltage lockout circuit section
Item
Symbol
OFF to ON threshold voltage
VTHUON
ITHUOFF
VUHYS
ON to OFF threshold voltage
Voltage hysteresis
Test condition
FA5331P(M)
FA5332P(M)
Unit
Min.
Typ.
Max. Min.
Typ.
Max.
14.3
15.3
16.3
14.6
15.3
16.0
V
7.6
8.3
9.0
7.6
8.3
9.0
V
7.0
7.0
V
Overall device
Item
Symbol
Test condition
FA5331P(M)
Min.
Standby current
ICCST
Operating-state supply current
ICCOP
ICCOFF
OFF-state supply current
VCC=14V
Pin 12=0V
FA5332P(M)
Unit
Typ.
Max. Min.
Typ.
Max.
90
140
90
140
µA
10
15
10
15
mA
1.1
1.8
1.1
1.8
mA
4
FA5331P(M)/FA5332P(M)
■ Description of each circuit
13 REF
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 CT and RT values. The relationship
between the CT and RT 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.
RT
15
CT
OSC
CT
R
14
Csy
SYNC
D1
Fig. 1 Oscillator
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
Vo
C1
R2
5
R4
R3
ER.AMP
_
A1
+
6
R1
FA5331: Vr=1.54V(typ.)
FA5332: Vr=1.55V(typ.)
Vr
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 )
1
2π C1 • R4
................................................. (3)
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
OVP
4
C1
F.F
Vp
............................... (2)
Error amplifier cutoff frequency (fc) is as follows:
fc =
MUL
Fig. 2 Voltage error amplifier and overvoltage limiting circuit
FA5331P(M)/FA5332P(M)
3. Current error amplifier and overcurrent limiting circuit
The current error amplifier forms a current loop to change the
input circuit current into sinusoidal waves. As Fig. 3 shows, the
multiplier output is connected to pin 2 (IIN –) through a resistor
(RA) to input the reference current signal. Pin 16 (IDET) is a
current input terminal. Design the circuit so that the voltage at
pin 16 will be within the range from 0 (GND potential) to –1.0V.
Connect a phase correction resistor and capacitors across pin
1 (amplifier output) and pin 2. See Fig. 4 for the expected gain
characteristics of the circuit shown in Fig. 3.
Here,
Z=
1
.................................................. (5)
2π R5 • C3
p=
1
2π R5 • C
C=
C2 • C3
C2 + C3
............................................. (6)
MUL
Vm
R5
1
C3
10k
C2
RA
CURR.AMP
_
A2
+
2
PWM
comparator
VREF
RC
RB
5k
15k
16
4
5V
Cn
Rn
C2
Vocp
F.F
OPC
Current
detection
Fig. 3 Current error amplifier and overcurrent limiting circuit
The voltage gain (G1) between Z and P of the circuit (gain
between pins 16 and 1) is given as follows:
Voltage gain
(dB)
G1 = 20 • log10 { 0.75 ( R5 + 1) }
RA
.................... (7)
Ensure an adequate phase margin by selecting C1 and C2 so
that the p/z ratio is about 10. The current error amplifier output
is used as an input to the comparator for PWM.
G1
The overcurrent detection comparator (C2) limits an
overcurrent. The threshold voltage for overcurrent detection at
pin 16 is –1.15V for FA5331 and –1.10V for FA5332. Connect
noise filters Rn and Cn to prevent the voltage at pin 16 from
fluctuating due to noise, causing the comparator to malfunction.
For Rn, select a resistor of up to 100Ω for FA5331 and up to
27Ω for FA5332. (See P64, 4. No-load operation )
Z
P
Frequency
Fig. 4 Voltage gain-frequency
CURR.AMP(A2) output Vc
Oscillator output Va
4. Comparator for PWM
Figure 5 shows the comparator for PWM. When the oscillator
output (Va) is smaller than the current error amplifier output
(Vc), the comparator output is high and the output ON signal is
generated at pin 8. Pin 11 (CS) is a terminal for soft start. This
terminal charges capacitor C4 with the internal constant current
(10µA) for a soft start. Priority is given to Vb and Vc whichever
is lower.
5. Multiplier
The multiplier generates a reference current signal. Input a
fully rectified sinusoidal signal voltage into pin 3 (VDET).
Design the circuit to keep the peak voltage at pin 3 within a
range from 0.65V to 2V for FA5331 and 0.65V to 2.4V for
FA5332. The multiplier output voltage (Vm) is roughly given as
follows (see Fig. 6):
CS
C4
C3
11
Vb
PWM comparator
10µA
Fig. 5 PWM comparator
VIN
ER.AMP(A1) output
R7
Ve
Vm = 1.25 – (Ve –1.55) • Vs .................................... (8)
As Fig. 3 shows Vm is internally connected to pin 2 (IIN–) of the
current error amplifier A2 through a 10kΩ resistor. (See the
characteristic curve, page 66 for the input and output
characteristics of the multiplier.)
MUL
3
Vm
Vs
R6
Fig. 6 Multiplier
6
FA5331P(M)/FA5332P(M)
6. ON/OFF control input circuit
Figure 7 shows the ON/OFF control input circuit. If pin 12 is set
to the high level (enable), this IC outputs pulses from the OUT
pin. If pin 12 is set to the low level (disable), the internal bias
power (reference voltage) goes off and the IC current
consumption becomes about 1/10 that of its ON state. The
output level of pin 11 (CS for soft start) also goes low.
Vcc
ON/OFF
12
10µA
1k
7. Output circuit
As Fig. 8 shows, pin 9 is configured as the high power terminal
(VC), independent of the IC power terminal (VCC). This pin
allows an independent drive resistance when the power
MOSFET is ON and OFF. If the drive resistances in the ON and
OFF states are Rg (on) and Rg (off), the following formulas can
be used to determine the total gate resistance
Rg:
100k
Fig. 7 ON/OFF control input circuit
Rg (on) = Rg1 + Rg2 ............................................. (9)
Rg (off) = Rg2 ..................................................... (10)
VCC
In the standby state, the output level of pin 8 is held low.
If the potential at the drain terminal of the power MOSFET
fluctuates, the gate-drain capacitance may drive the IC output
voltage at pin 8 to below 0. Once the voltage at pin 8 reaches
–0.6V, an unwanted current flows in the IC and a large abnormal
current flows in the output circuit when the output transistor is
turned on. To prevent this, connect a Schottky diode across the
gate and source of the power MOSFET.
10
Rg1
9
+
Cv
Pin7
Rg2
8
GND
7
Schottky
diode
Fig. 8 Output circuit
7
FA5331P(M)/FA5332P(M)
■ Design advice
1. Start circuit
Figure 9 shows a sample start circuit. Since the IC current
while the Vcc pin voltage rises from 0V to VTHON is as small as
90µA (typ.), the power loss in resistor RA is small. If an
additional winding is prepared in the voltage step-up inductor
(L), power to the control circuit can be supplied from this
circuit. However, the voltage must be stabilized by a regulator
circuit (REG) to prevent an excess rise of the IC supply voltage
(Vcc). Use fast or ultra-fast rectifier diodes for the rectifier circuit
(DB1) of the winding for high-frequency operation.
DB1
L
Io
RA
AC input
Vcc
REG
16
Vin
√2 • Pin
.................................................. (11)
Vin: Minimum AC input voltage (effective value) [V]
Pin: Maximum input power [W]
Since the threshold voltage of the overcurrent limiting circuit
(pin 16) is –1.15V for FA5311 for and –1.10V for FA5332, the
peak input current limit (ip) is determined by:
FA5331: ip= 1.15
.............................................................................
(12)
Rs
FA5332: ip= 1.10
Rs
3. Voltage step-up type converter
Figure 9 shows the basic circuit of a voltage step-up type
converter which is used as a power factor correction.
(a) Output voltage
For stable operation, set the output voltage to be 10V or more
over the peak value of the maximum input voltage. When
using this IC for an active filter, set the output voltage (Vo) as
follows:
Vo ≥ √ 2 • Vin + 10V ............................................ (13)
Vin: Maximum AC input voltage [V]
(effective value of sinusoidal wave)
(b) Voltage step-up inductor
When using a voltage step-up converter in continuous current
mode, the ratio of inductor current ripple to the input peak
current is set to about 20%. Determine the inductance as
follows:
2
L ≥ Vin ( Vo – √ 2 • Vin )
γ • fs • Pin • Vo
................................ (14)
C
CA
RS
FA5331/FA5332
7
2. Current sensing resistor
The current sensing resistor (Rs) detects the current in the
inductor. Rs is used to make the input current sinusoidal. The
current in the inductor produces a negative voltage across Rs.
The voltage is input to IC pin 16 (IDET). Determine the value
of Rs so that the peak voltage of the IDET pin is –1V.
Rs =
10
Fig. 9 Start circuit
Example: FA5332
When Vin is 85V and Pin is 300W, the formulas of (11)
and (12) can be calculated as:
Rs =
ip =
85
= 0.2 [ Ω ]
√ 2 • 300
1.10
0.2
= 5.5 [ A ]
And,
R6
= 0.65 [ V ]
R6 + R7
If R6 is set to 2.7kΩ to satisfy these formulas, R7 becomes
480kΩ.
√ 2 • 85 •
Example:
When Vin is 85V, Vo is 385V, and γ is 0.2, the formula of (14)
can be calculated as:
L≥
2.48 ✕ 104 [ H ] ......................................... (15)
fs • Pin
(c) Smoothing capacitor
When a voltage step-up converter is used in a power factor
correction circuit, the input current waveform is regulated to be
in-phase with the input voltage waveform. Therefore, ripple
noise of twice the input line frequency appears at the output.
The output voltage (υo) is represented as:
υo = Vo –
Io
• Sin 2 ωo t
2 • ωo •C
................... (16)
Vin: Minimum AC input voltage (effective value) [V]
γ : Ratio of inductor current ripple (peak to peak value) to the
input peak current (about 0.2)
fs: Switching frequency [Hz]
Pin: Converter’s maximum input power [W]
Vo: Average output voltage
Io: Output current
ωo : 2π fo (fo: Input power frequency, 50 or 60Hz)
C: Smoothing capacitor value
As the characteristic curves on page 66 show, the peak
voltage at pin 3 should be at least 0.65V, even when the AC
input voltage is minimal. Considering this, determine R6 and
R7 shown in Fig. 6.
Therefore, the peak-to-peak value of the output ripple voltage
Vrp is given by:
Io
..................................................... (17)
ω oC
Using formula (17), determine the necessary C value.
Vrp =
8
FA5331P(M)/FA5332P(M)
4. No-load operation
The following condition should be meet to prevent from
overvoltage and audible noise during no-load or light-load
operation.
For FA5331 (Fig.10)
0.85•움 ≤ ROFST(kΩ)≤ 움
where, 움= 13 REF
ROFST
2 IIN–
C3
C2
Rx
FA5331
R5
(3.5•103–0.26•Rn)•12
1 IFB
42+0.26•Rn
and, Rn ≤ 100Ω
and, RX: don’t connect.
Current
detection
Rn
16 IDET
•You must not connect RX which reduces DC gain of current
error amplifier.
•You can connect R5 which is series with capacitor C3.
Cn
For FA5332 (Fig.11)
Rn ≤ 27Ω
and, RX: don’t connect.
Fig.10
•You must not connect RX which reduces DC gain of current
error amplifier.
•You can connect R5 which is series with capacitor C3.
•If you connect ROFST, dead time of AC input current will
extend.
13 REF
ROFST
2 IIN–
C3
C2
Rx
FA5332
R5
5. How to prevent from intermittent switching of low
frequency
An intermittent switching, which frequency is lower than 10Hz,
occurs in some applications.
In this case, it is possible to prevent from this intermittent
switching to reduce feedback gain by decreasing the
resistance of R4. (See Fig. 2)
You must check the effect thoroughly because this intermittent
switching depends on load, temperature and input condition.
9
1 IFB
Current
detection
Rn
16 IDET
Cn
Fig.11
FA5331P(M)/FA5332P(M)
■ Characteristic curves (Ta = 25°C)
Oscillation frequency (fOSC ) vs.
timing resistor resistance (R T)
FA5331
FA5332
200
fosc [kHz]
100
50
CT=330pF
CT=470pF
20
CT=680pF
10
20
10
100
50
RT [kΩ]
Oscillation frequency (fOSC ) vs.
ambient temperature (Ta)
FA5331
FA5332
78
77
76
fosc [kHz]
75
74
73
72
Vcc=18V
CT=470pF
RT=22kΩ
71
70
69
68
–40
–20
0
20
40
60
80
100
Ta [˚C]
Output duty cycle vs. CS terminal voltage (VCS )
ON/OFF control terminal current vs.
ON/OFF control terminal voltage
10
FA5331P(M)/FA5332P(M)
IIN– terminal voltage vs. VDET terminal voltage
Multiplier I/O
FA5331
FA5332
1.4
VFB=1.5V
VFB=1.7V
0.8
VFB=2.0V
B=
3.0
B=
0.4
V
2.5
B=
V
VF
0.6
VF
IIN– terminal voltage [V]
VFB=1.6V
1.0
VF
IIN– terminal voltage [V]
1.2
3.5
V
0.2
0
0
0.4
0.8
1.2
1.6
2
2.4
VDET terminal voltage [V]
IDET terminal voltage vs. IIN– terminal voltage
Normal operation
FA5331
FA5332
0
IDET terminal voltage [V]
IDET terminal voltage [V]
0
–0.5
–1.0
1.0
1.5
–1.5
0
0.5
1.0
IIN– terminal voltage [V]
H-level output voltage (VOH) vs.
output source current (ISOURCE)
11
0.5
1.5
0
0.5
1.0
IIN– terminal voltage [V]
L-level output voltage(VOL) vs.
output sink current (ISINK)
1.5
FA5331P(M)/FA5332P(M)
Overcurrent limiting threshold voltage vs.
ambient temperature (Ta)
FA5331
FA5332
Overcurrent limiting threshold voltage [V]
–1.08
–1.09
Vcc=18V
–1.1
–1.11
–1.12
–1.13
–40
–20
0
20
40
60
80
100
Ta [˚C]
OVP terminal threshold voltage vs.
ambient temperature (Ta)
FA5331
FA5332
1.67
OVP terminal threshold voltage [V]
Vcc=18V
1.66
1.65
1.64
1.63
1.62
1.61
–40
–20
0
20
40
60
80
100
Ta [˚C]
Supply current (ICC ) vs. supply voltage (VCC)
Normal operation
Supply current (ICC ) vs. supply voltage (VCC)
OFF mode
12
FA5331P(M)/FA5332P(M)
■ Application circuit
Á Example of FA5331 application circuit
Á Example of FA5332 application circuit
Parts tolerances characteristics are not defined in the circuit design sample shown above. When designing an actual circuit for a product, you
must determine parts tolerances and characteristics for safe and economical operation.
13