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FA551X
3
■ Electrical characteristics (VCC=18V, RT=47k
Ω, Ta=25˚C)
Reference voltage section (REF pin)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Reference voltage
VREF
Tj=25˚C
4.75
5.00
5.25
V
Line regulation
Vdv1
VCC=10 to 28V
±6
±20
mV
Load regulation
Vdv2
IL=0 to 10mA, VCC=18V
–40
–12
mV
Temperature stability
VdT
Ta=–30 to 85˚C
±0.5
mV/˚C
Oscillator section (RT pin)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Oscillation frequency
fOSC
RT=47k
Ω, Tj=25˚C
92.6
100
107.4
kHz
Voltage stability
fdv
VCC=10 to 28V
±1.0
%
Temperature stability
fdT
Ta=–30 to 85˚C
±0.02
%/˚C
Pulse width modulation circuit section (FB pin)
Item
Symbol
Test condition
FA5510/14
FA5511/15
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
FB pin source current
IFB
VFB=0
–855
–720
–585
–855
–720
–585
µA
Input threshold voltage (FB pin)
VTH FB0
Duty cycle =0%
0.9
1
0.9
1
V
VTH FBM
Duty cycle =
DMAX
1.92
2.40
V
Maximum duty cycle
DMAX
42
46
50
66
70
74
%
Overcurrent limiting circuit section (IS pin)
Item
Symbol
Test condition
FA5510/11
FA5514/15
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Input threshold voltage (IS pin)
VTHIS
220
240
260
–190
–170
–150
mV
Source current (IS pin)
IIS
VIS=0V
±5
–28
–20
–12
µA
Delay time
tpdIS
150
150
ns
Output ON/OFF control circuit section (CS pin)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Source current (CS pin)
IS0CS
VCS=0V, Tj=25˚C
–7.2
–5.2
–3.2
µA
ON/OFF control threshold voltage (CS pin)
VTHON
OFF
→ON, Tj=25˚C
0.8
0.93
V
VTHOFF
ON
→OFF, Tj=25C
0.50
0.68
V
Hysteresis voltage
VTHOHS
0.12
V
Soft start circuit section (CS pin)
Item
Symbol
Test condition
FA5310/14
FA5311/15
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Charge current (CS pin)
ICHG
VCS=1V, Tj=25˚C –7.2
–5.2
–3.2
–7.2
–5.2
–3.2
µA
Input threshold voltage (CS pin)
VTH CS0
Duty cycle =0%
0.90
1.0
0.90
1.0
V
VTH CSM
Duty cycle =
DMAX
1.92
2.40
V
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