FA5332PM Datasheet PDF - Fuji Electric
| Part Number | FA5332PM | |
| Description | Bipolar IC For Power Factor Correction | |
| Manufacturers | Fuji Electric | |
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FFAA53351P3(M3)/F1A5P332(PM(M))/FA5332P(M)
Bipolar IC
For Power Factor Correction
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.
s 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.
s Block diagram
s Dimensions, mm
SOP-16
16 9
1 10.06 8
0.40±0.1
DIP-16
FA5331P
16
1.27±0.2
9
1
0.81
19.4
8
1.5
0.7
2.54±0.25
FA5332P
16
0.5±0.1
7.6
0~15˚
0.3+–00.1.05
0~15˚
9
Pin Pin
No. symbol
Description
1 IFB
Current error amplifier output
2 IIN–
Inverting input to current error amplifier
3 VDET
Multiplier input
4 OVP
Overvoltage protection input
5 VFB
Voltage error amplifier output
6 VIN–
Inverting input to voltage error amplifier
7 GND
Ground
8 OUT
Output
9 VC
Power supply to output circuit
10 VCC
Power supply
11 CS
Soft-start
12 ON/OFF Output ON/OFF control input
13 REF
Reference voltage
14 SYNC Oscillator synchronization input
15 CT
Oscillator timing capacitor and resistor
16 IDET
Non-inverting input to current error amplifier
1
1
0.71
19.2
8
1.3
2.54±0.25
0.48±0.1
7.62
0~15˚
0.25+–00.1.05
0~15˚
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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 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.
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:
V..o...=.....R...1...+...R..2......•..V...r............................................... (1)
R1
FA5331: Vr=1.54V(typ.)
FA5332: Vr=1.55V(typ.)
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
............................... (2)
R3 ( 1 + jω C1 • R4 )
Error amplifier cutoff frequency (fc) is as follows:
fc =
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.
13 REF
RT
15 CT
CT
OSC
R
14
Csy SYNC
D1
Fig. 1 Oscillator
Vo
C1
5
R2 R4
R3
R1
6
_ ER.AMP
A1
+
Vr
4
Vp
OVP
C1
MUL
F.F
Fig. 2 Voltage error amplifier and overvoltage limiting circuit
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for FA5332PM electronic component. |
| Information | Total 13 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ FA5332PM.PDF Datasheet ] | |
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