FA3641N 데이터 시트보기 (PDF) - Fuji Electric
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FA3641N Datasheet PDF : 21 Pages
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FA3641P(N), FA3647P(N)
s Recommended operating condition
Item
Supply voltage
REF pin bypass capacitor
Soft-start capacitor
Oscillation frequency (FB >1.2V)
Min.oscillation frequency at light load mode (FB <1.2V)
Symbol
VCC
Cref
CS
fOSC
fOSCL
Min.
10
0.1
0.01
30
10
Typ.
0.47
Max.
28
1
500
Unit
V
µF
µF
kHz
kHz
s Electrical characteristics (Vcc=18V, RT=47kΩ, Ta=25˚C)
Reference voltage section
Item
Reference voltage
Voltage variation 1 (Line regulation)
Voltage variation 2 (Load regulation))
Voltage variation 3 (Temperature stability)
Symbol
VREF
VdV
VdV
VdT
Test condition
Tj=25˚C
VCC=10 to 28V
IL=0 to 10mA, Vcc=18V
Ta= –30 to +85°C
Min.
4.75
Typ.
5.00
±6
±6
±0.5
Max.
5.25
±20
±20
Unit
V
mV
mV
mV/°C
Oscillator section
Item
Oscillation frequency
Frequency variation 1 (Voltage stability)
Frequency variation 2 (Temperature stability)
Symbol
fOSC
fdV
fdT
Test condition
RT=47kΩ, Tj=25˚C
VCC=10 to 28V
Ta= –30 to +85°C
Min.
92.6
Typ.
100
±1.6
±0.02
Max.
107.4
Unit
kHz
%
% / °C
Pulse width modulation circuit section
Item
FB pin source current
Input threshold voltage (FB pin)
Maximum duty cycle
Symbol
IFB
VTH FBO
VTH FBM
DMAX
Test condition
VFB=0V
Duty cycle =0%
Duty cycle =DMAX
VFB=2.5V
Min. Typ. Max. Unit
–985 –750 –615 µA
0.95 1.03
V
2.40
V
66
70
74
%
Reducing oscillation frequency section
Item
FB pin threshold voltage
Frequency reduction
Minimum oscillation frequency
Symbol
VTH FBS
kfS1
foscS2
Test condition
VFB=1.10 to 1.15V
Min.
Typ.
1.18
16.7
46
Max. Unit
V
kHZ
kHZ
Overcurrent limiting circuit section
Item
Input threshold voltage (IS pin)
Input terminal source current (IS pin)
Delay time
Symbol
VTH IS
I IS
TPD IS
Test condition
VIS =0V
FA3641P/N
Min. Typ.
215 235
150
FA3647P/N
Unit
Max. Min. Typ. Max.
255 –188 –168 –148 mV
–5
–20
µA
150
ns
Soft-start circuit section
Item
Charge current (CS pin)
Input threshold voltage (CS pin)
Symbol
ICHG
VTH CSO
VTH CSM
Test condition
VCS =1V, Tj=25˚C
Duty cycle =0%
Duty cycle =DMAX
Min.
–4.0
0.95
Typ.
–6.5
1.03
2.40
Max. Unit
–9.0 µA
V
V
60
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