FA7703 Datasheet, PDF (7/21 Pages) Fuji Electric – FUJI Power Supply Control IC

FA7703/04
FA7703/7704
(3)Electrical characteristics [Unless otherwise standard,Ta=25°C,Vcc=6V,RT=22kΩ]
(1) Internal Bias Section (REF terminal voltage)
Item
Symbol
Conditions
MIN. TYP.
Output Voltage
VREF
REF terminal load current
IREF=0mA
0.990 1.000
Line Regulation
VLINEF
FA7703:Vcc=2.5 to 28V,IREF=0mA
FA7704:Vcc=2.5 to 18V,IREF=0mA
±1
Load Regulation
VLDF IREF=0 to 1mA
-10
-3
Variation
with temperature
VTCF
Ta=-30 to +85°C
Change rate for value at 25°C
-0.8 to
+0.2
MAX.
1.010
±5
Units
V
mV
mV
%
(2) Regulated Voltage for Internal Control Blocks Section (REG terminal voltage)
Item
Symbol
Conditions
MIN. TYP.
Output Voltage
VREG
REG terminal load current
IREG=0mA
2.156 2.200
Line Regulation
VLINEG
FA7703:Vcc=2.5 to 28V,IREG=0mA
FA7704:Vcc=2.5 to 18V,IREG=0mA
±4
Load Regulation
Variation
with temperature
VLDG
VTCG
IREG=0 to 2mA
Ta=-30 to +85°C
Change rate for value at 25°C
-12
-2
-0.8 to
+0.2
MAX.
2.244
±14
Units
V
mV
mV
%
(3) Oscillator Section
Item
Oscillation frequency
Line Regulation
Variation
With temperature
Symbol
fOSC
f LINE
fTC1
fTC2
Conditions
RT=22kΩ
FA7703:Vcc=2.5 to 28V
FA7704:Vcc=2.5 to 18V
Ta=+25 to -30°C, f=50k to 1MHz
Ta=+25 to +85°C, f=50k to1MHz
MIN.
160
TYP.
190
±0.1
±2
±3
MAX.
220
Units
kHz
%
%
%
(4) Error Amplifier Section (Input:IN1-,IN2+,IN2-,Output:FB1,FB2 terminal)
Item
Symbol
Conditions
MIN.
Reference Voltage
VB IN1- terminal threshold voltage
0.980
(ch1)
Input offset (ch2)
VOFST (IN2+) - (IN2-)
-
Common mode input
voltage
VIN
0.3
Input Current
IIN
-100
Open Loop Gain
AVO
70
Unity Gain Bandwidth
fT
Output Source Current
IOHE
FB1,2
terminal voltage=VREF-0.5V
-220
Output sink Current
IOLE FB1,2 terminal voltage=0.5V
3
TYP.
1.000
-
0
1.5
-160
6
MAX.
1.020
±10
1.4
+100
-100
12
Units
V
mV
V
nA
dB
MHz
μA
mA
(5) Pulse Width Modulation Section (FB1,FB2 terminal)
Item
Symbol
Conditions
Input threshold voltage VFB0 Duty Cycle=0%
Input threshold voltage VFB100 Duty Cycle=100%
MIN.
0.550
1.000
TYP.
0.650
1.100
MAX.
0.750
1.200
Units
V
V
(6) Dead Time Adjustment Circuit Section (DT1, DT2 terminal)
Item
Symbol
Conditions
Input threshold voltage VDT0 Duty Cycle=0%
Input threshold voltage VDT100 Duty Cycle=100%
MIN.
0.550
1.000
TYP.
0.650
1.100
MAX.
0.750
1.200
Units
V
V
Fuji Electric Systems Co., Ltd.
AN-057E Rev.1.0
Jun-2010
7
http://www.fujielectric.co.jp/fdt/scd/