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FA7703 Datasheet(PDF) 7 Page - Fuji Electric

Part # FA7703
Description  FUJI Power Supply Control IC
Download  21 Pages
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Manufacturer  FUJI [Fuji Electric]
Direct Link  http://www.fujielectric.co.jp/eng/fdt/scd
Logo FUJI - Fuji Electric

FA7703 Datasheet(HTML) 7 Page - Fuji Electric

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


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