FA7711V Datasheet, PDF (7/25 Pages) Fuji Electric – FUJI Power Supply Control IC

FA7711V
(3)Electrical chracteristics
・The characteristics is based on the condition of VCC=12V ，CREF=1.0 μF，RT=9.0k Ω，Ta=+25℃,unless
otherwise specified
(1)Refreence voltage section (VREF pin)
Item
Reference voltage
Line regulation
Load regulation
Variation with temperature
Symbol
VREF
VREF_LINE
VREF_LOAD
VREF_TC1
Condition
VCC=4.5 to 28V,IREF=0mA
IREF=0 to 7mA,VCC=8V to 28V
IREF=0 to 1mA,VCC=4.5V to 8V
Ta=- 20 to +85℃
MIN. TYP. MAX. Unit
3.663 3.700 3.737
V
－
±8
±25
mV
- 20
-5
mV
-5
±0.5
%
(2)Oscillator section (RT pin)
Item
Symbol
Oscillation frequency
fOSC
Line regulation
fOSC_LINE
Variation with temperature fOSC_TC1
Condition
RT=9.0kΩ
VCC=4.5 to 28V
Ta=- 20 to +85℃
MIN. TYP. MAX. Unit
500
560
620
kHz
－
±1
±5
%
±3
%
(3)Error Amplifier section (IN1+，IN1-，FB1，IN2+，IN2-，FB2，IN3+，IN3-，FB3 pin)
Item
Symbol
Condition
MIN.
Input offset voltage
VOFFSET VIN+=1.8V，IN+ - IN-
―
Line regulation (Input offset) VOFF_LINE VCC=4.5 to 28V
Input current
IIN
VIN=0.0 to 5V
Common mode input voltage
VCOM
0.5
Open loop gain
AVO
Unity gain bandwidth
fT
Output sink current
ISIFB
VFB=0.5V,VIN-=VREF,VIN+=1.8V
1.9
Output source current
ISOFB
VFB=VREF- 0.5V,VIN-=0V,VIN+=1.8V
- 280
TYP.
―
0
0
70
1.5
2.7
- 185
MAX.
±10
2.7
3.5
- 90
Unit
mV
mV
μA
V
dB
MHz
mA
μA
(4)Soft start section (CS1，CS2，CS3 pin)
Item
Symbol
Condition
Threshold voltage (CS3)
(Driving Nch-MOSFET)
Threshold voltage (CS1/3)
(Driving Pch-MOSFET)
Threshold voltage (CS2)
(Driving Nch-MOSFET)
Threshold voltage (CS2)
(Driving Pch-MOSFET)
VCS3D20N
VCS3D80N
VCS1/3D0P
VCS1/3D20P
VCS2D20N
VCS2D80N
VCS2D20P
VCS2D80P
DUTY3=20%,VFB3=2.8V
DUTY3=80%,VFB3=2.8V
DUTY1/3=20%,VFB1/3=2.8V
DUTY1/3=80%,VFB1/3=2.8V
DUTY2=20%,VFB2=0.8V
DUTY2=80%,VFB2=0.8V
DUTY2=20%,VFB2=0.8V
DUTY2=80%,VFB2=0.8V
MIN. TYP. MAX. Unit
1.4
1.5
1.6
V
2.0
2.1
2.2
V
1.4
1.5
1.6
V
2.0
2.1
2.2
V
2.0
2.1
2.2
V
1.4
1.5
1.6
V
2.0
2.1
2.2
V
1.4
1.5
1.6
V
Fuji Electric Systems Co., Ltd.
AN-060E Rev.1.0
7
Jun-2010
http://www.fujielectric.co.jp/fdt/scd/